变频器毕业论文外文翻译

变频器外文翻译文献

变频器外文翻译文献(文档含中英文对照即英文原文和中文翻译)外文:Converter reference design(1)Converter Selection:Selection to determine the frequency converter when the following points:1) The purpose of a variable frequency; constant pressure to control or constant current control.2) the load converter types such as leaves or pump volume pumps, with special attention to load the performance curve, the performance curve of the decision of the ways and means.3) the frequency converter and load matchingVoltage match: a rated voltage converter with a rated voltage line with the load. Current matches: ordinary pump, the rated current inverter and motor rated current match. For special load such as deep-water pumps, and so on need to refer to the electrical performance parameters to determine the most current inverter current and Guozainengli.Torque match: in this case constant torque load or slow down when the device may have occurred.4) the use of high-speed motor drive inverter, because of the high-speed motor, anti-small, high harmonics lead to increased output current value increases. So for high-speed motor inverter Selection, its capacity to be slightly larger than the ordinary motor selection.5) If the frequency converter to a long cable run, this time to take measures to curb the long cable to the impact of capacitive coupling, inadequate efforts to avoid converter, so in this case, the drive to enlarge the capacity of a file or the converter Output installed output reactor.6) For the application of some special occasions, such as high temperatures, high altitude, at this time would cause the down converter capacity, the drive to enlarge the capacity of a block.(2) inverter control schematic design:1) First confirmation of the installation environment ConverterOperating temperature: high-power converter is the internal electronic components, vulnerable to the effects of temperature, product general requirementsfor 0 ~ 55 ℃, but in order to ensure the safe, reliable, the use of room to be taken into account, the best control in 40 ℃below. In the control box, the converter box should generally be installed in the upper and strictly comply with the Manual of installation requirements, absolutely not be allowed to heating elements or components easily fever close to the converter installed at the bottom.Ambient temperature: the temperature is too high and large temperature changes, within easy converter there is dew, the insulation properties will be greatly reduced,or even short-circuit caused the accident. When necessary, to be added to the desiccant in the box and heater. In water treatment, generally heavier than water vapor, if the temperature changes, then this problem would be more prominent.Corrosive gases: the use of the environment if the corrosive gas concentrations, will not only lead corrosion of components, printed circuit boards, but it will also accelerate the aging of plastic devices, reducing insulation properties.Vibration and shock: the control cabinet with converter by vibration and mechanical shocks will cause electrical connection is bad. Huaian thermoelectric there such a problem. Apart from raising the control cabinet at this time of the mechanical strength, vibration and shock away from the source, we must also use seismic rubber pad fixed within and outside the control cabinet, such as electromagnetic switches have a vibration components. Equipment operation after a period of time and should conduct inspections and maintenance.Electromagnetic interference: Inverter at work due to rectification and frequency, produce around a lot of electromagnetic interference, these high-frequency electromagnetic waves in the vicinity of the instrument, apparatus, a certain interference. Therefore, the cabinet instrumentation and electronic systems, it should be optional metal, shielding the inverter instrument interference. All the components should be reliable grounding, in addition, the electrical components, equipment andinstrumentation should use the connectivity between the shielding control cables, and the shield should be grounded. If handled properly electromagnetic interference, often cause the entire system does not work, leading to the control unit failure or damage.2) Drives and determine the distance between the electrical cables and wiring methodsDrives and motor the short distance should be as much as possible. This reduces the capacitance of the cable, reducing the emission source of interference.Control cables optional shielded cable, power cable or optional shielding from the cable converter to use all the threads of the electrical shield.Electric cables should be independent of the other cable alignment, the minimum distance of 500 mm. At the same time should avoid the electrical cables and other long-running cable lines, in order to reduce the output voltage inverter rapid changes in the electromagnetic interference. If the control cables and power cables cross, as far as possible so that they cross the 90-degree angle. Converter and analog signals on the line and back to the main line of separation of alignment, even in the case also in the control cabinet.And the analog signal converter line the best choice of unshielded twisted pair, shielded power cables selection of the three-core cable (its specifications than ordinary electrical cables in the files) or to comply with the user manual converter.3) inverter control schematicsMain circuit: the role of reactor is to prevent the high-frequency converter harmonic power through the input circuit to return to the grid by the impact of other electronic devices, in accordance with the capacity size converter to decide whether to increase reactor; filter Converter is installed in the output, the output of high-frequency converter to reduce harmonics, when the electrical inverter to the longer distance, we should install filters. Although the frequency converter itself has all kinds of protection, but the lack of protection is not perfect, the main circuit breaker played overload, lack the same protection, selection, in accordance with the capacity to choose the frequency converter. Converter itself can be used to replace thermal overload protection relay.Control loop: the frequency with the frequency manually switch to the failure frequency can be manually cut-operation, not because of output voltage, frequency and frequency-be interlocked.4) Inverter groundingInverter correct grounding is to improve the system stability, the ability to inhibit an important means of noise. Inverter grounding resistance grounding terminal of the smaller the better, the grounding wire cross-section of not less than 4 mm, the length of not more than 5 m. Inverter should be grounded and power equipment to the sites separately, not in total. The shield signal converter from one end of the grounding end, the other floating air. Inverter and control of electrical between the same counter.(3) Inverter Control DesignConverter should be installed in the control cabinet internal control counters in the design should pay attention to the following issues1) heat: Inverter fever is the internal loss. In the frequency converter in the main part of the loss mainly to the main circuit, or about 98 percent, accounting for 2% of control circuits. In order to ensure reliable operation of the normal inverter, Thermal must inverter are usually used for cooling fan; converter fan of the contents of the converter box can be removed internal heat, if the fan does not work, should immediately stop inverter Operation; the high-power inverter also need to increase control Guishang fan, Control of the wind, to design a reasonable, all outlet into the net to set up dust, exhaust open, to avoid over the counter in a swirl, in a fixed location dust Accumulation, according to the statement converter ventilation fans to select the match, fans installed to the attention of earthquake problems.2) the problem of electromagnetic interferenceConverter in its work due to rectification and frequency, produce around a lot of electromagnetic interference, these high-frequency electromagnetic waves in the vicinity of the instrument, apparatus, a certain interference, and will produce high harmonics, the high harmonics will be available for adoption Xinhua loop into the whole power supply network, thus affecting other instruments. If the power inverter system as a whole lot of more than 25 percent, to be considered the anti-jammingmeasures to control supply.When the system in the high-frequency welding machine such as the impact load, electroplating power, the converter itself will appear as interference protection, to consider the whole system of power quality problems.3) protection issues need to pay attention to the following pointsWaterproof anti-condensation: If the converter on the scene, the need to pay attention to the frequency converter Guishang not have the flange or other pipeline leak, the inverter can not be near the water splash, sum up the scene OEM Switchgear Kits & level of security to IP43 above.BOOT: All outlet into the net to set up dust debris into the barrier floc, dust network should be designed to be removable, to facilitate the clean-up, maintenance. Dust of the grid network in accordance with the specific circumstances at the scene determined that dust around the net and Control Department to handle the combination of tight.Anti-corrosive gases: the chemical industry in this relatively Most of this can be on the frequency counters in the control room.(4) converter cable normsSignal lines and power lines must be separately alignment: the use of analog signal converter for remote control, in order to reduce the analog converter and other equipment from the interference, please control signal converter line with the strong electric circuit (H Circuit-and-loop) separate alignment. Distance should be 30 cm above. Even in the control cabinet, the same connection to maintain such a standard. The signal converter and the control should not be longer than the road back to 50 m. Signal lines and power lines must be placed in different metal pipe or metal hose internal: connect PLC and the signal converter if not placed in metal tubes, Drives and vulnerable to external interference equipment; because the converter No built-in the reactor, so the converter input and output level of external power line will have a very strong interference, placing the signal lines of metal or metal hose has to be extended to the inverter control terminal, to ensure that the signal Line and the complete separation of power lines.1) analog control signal line should use two-strands shielding line, cable specifications for 0.75 mm2. When the wiring must pay attention to, to the extent possible, the cable Baoxian short (5-7 mm or so), while Bao Xian after the shield should wrap insulating tape to prevent shielding lines and other equipment contact with the introduction of interference.2) To improve the simple wiring and reliability, signal recommend the use of online video pressure bar.(5) converter and the operation of the relevant parameters setInverter setting parameters, the parameters of each have a certain range of options, often encountered in the use of individual set of parameters for misconduct, leading converter does not work phenomenon.Control: that is, speed control, transferred from the control, PID control or other means. To take control, according to the general control precision, the need for static or dynamic identification.Running a minimum of: that is, the minimum speed motor running, the motor running at low speed, its poor performance cooling, electrical long run on low speed, it can cause burning motor. And at low speed, the cable will increase in the current, cable will lead to fever.The maximum operating frequency: the general maximum frequency converter to 60 Hz, and some even to 400 Hz, high-frequency will enable high-speed motor operation, which the ordinary motor, its bearings can not be over-speed long run, whether the motor rotor To be capable of such a centrifugal force.Carrier frequency: the higher the carrier frequency setting its high harmonics greater weight, and the length of cable, the electrical heating, cable converter fever fever and other factors are closely related.Electrical parameters: the frequency converter to set parameters of the motor power, current, voltage, speed, maximum frequency, these parameters can be directly in the motor nameplate.FH: In a frequency point, there may be a resonance phenomenon, particularly in the relatively high when the entire device in control of the compressor, thecompressor to avoid the surge point.(6) common fault analysis1) flow failure: over-current fault can be divided into acceleration, deceleration, constant speed over-current. May be due to the increase in frequency converter too little time to slow down, load mutations, the unequal distribution of load, output short-circuit, and other causes. At this time can be extended by the general acceleration and deceleration time, reduce the load of mutations, plus braking energy components, load distribution design, the lines to be checked. If off-load converter ora failure that has been Central converter inverter circuits, to be replaced converter.2) overload fault: overload fault, including frequency and overload the electrical overload. May be accelerated their time is too short, too low voltage power grids, Fuzaiguochong and other causes. General can be accelerated through the extension of time to extend the braking time, such as check-voltage power grid. Fuzaiguochong, selected motor and inverter can not drag the load, but also may be due to poor machinery lubrication caused. If the former is the need to replace high-power motors and inverter, if the latter will have to carry out maintenance on production machinery.3) under-voltage: the importation of some of the power inverter that there are problems, need to check before you can run.变频器设计使用参考（1）变频器选型：变频器选型时要确定以下几点：1) 采用变频的目的；恒压控制或恒流控制等。

变频器工作原理外文文献翻译、中英文翻译

变频器工作原理外文文献翻译、中英文翻译外文资料Converter working principleMain circuit is for induction motors provide voltage variable frequency power source power conversion part, the inverter main circuit in general can be divided into two categories [1]: voltage is voltage source DC converter for AC inverter, the DC loop filter is capacitance. Current model is the current source of the direct streamization AC inverter, the DC circuit filter inductance. It consists of three parts, the power supply conversion for DC power rectifier, absorption produced in converter and inverter voltage ripple "flat wave circuit, and DC power converter for AC power" inverter ".(1) rectifier: Recently a lot of use is diode converter, it is the power supply conversion for the DC power supply. Also available two groups of transistor converters constitute a reversible converter, due to its power direction reversible can regeneration operation.(2) the flat wave circuit: in the rectifier DC voltage, containing 6 times the frequency of power supply ripple voltage, furthermore the inverter produces a pulsating current the DC voltage changes. In order to suppress the voltage fluctuation, the inductance and capacitance absorption pulsating voltage (current). Device volume hours, if power supply and a main circuit component in margin can save inductance of the simple flat wave circuit.(3) inverter: Contrary to rectifier, inverter is the DC power conversion is the desired frequency AC power and to determine the time the six switch device turn-on and off you can get 3 phaseAC output. By voltage type PWM converter as exemplifying the switching time and voltage waveform.Control circuit is to provide a loop control signal to the asynchronous motor power supply (voltage, frequency) of the main circuit, the frequency, the voltage "operation circuit", the main circuit of the "voltage and current detection circuit, the motor" speed detection circuit, operation circuit of control signal amplification drive circuit ", and the inverter and the motor" protection circuit.(1) arithmetic circuit: the external speed, torque and other instructions with the detection circuit of the current, voltage signal comparison operation, determine the output voltage of the inverter, frequency.(2) voltage, current detection circuit: with the main circuit potential isolation detection voltage, current and so on.(3) driving circuit, driving circuit of main circuit devices. It and control isolation circuit enable device in the main circuit turn-on, turn off.(4) speed detection circuit installed in asynchronous motor shaft machine speed detector (TG, PLG) signal for speed signal into the computing circuit, according to the instruction and operation can make the motor run in the speed command.(5) protection circuit: detection of the main circuit of the voltage, current and so on, when the occurrence of overload or over voltage, etc., in order to prevent the inverter and asynchronous motor damage, so that the inverter to stop working or inhibit voltage, current value.中文翻译变频器工作原理主电路是给异步电动机提供调压调频电源的电力变换部分，变频器的主电路大体上可分为两类[1]:电压型是将电压源的直流变换为交流的变频器，直流回路的滤波是电容。

变频器-PLC在供水控制系统的应用中英文对照翻译全文

Transducer in the water control system applicationsCurrently，the water level control in a large part of the electrical pumps are not towing gear shift system, no gear shift most of the electrical energy consumed in the water supply to the frequent changes in the pumps stopped. This not only makes the electrical work in inefficient zones, cut short the useful life of electrical and electrical equipment for the frequent failure to stop the high rate, leading to serious waste of water resources, system maintenance，repairs larger workload。

With high living water and industrial water gradually increased, the traditional control methods that are outdated。

Originally used for artificial water level control，water level due to the lack of accurate positioning hour monitoring，it is difficult to accurately control the pumps have stopped；Using buoys or mechanical control devices such as water supply situation has made some changes，but because of mechanical failure more devices，poor reliability to maintenance will face great trouble。

PLC及变频器技术论文中英文资料对照外文翻译文献综述

PLC及变频器技术中英文资料对照外文翻译文献综述PLC and inverter technology trends1. The development trend of the programmable controller“PLC is one kind specially for the digital operation operation electronic installation which applies under the industry environment designs. It uses may the coding memory, uses for in its internal memory operation and so on actuating logic operation, sequence operation, time, counting and arithmetic operation instructions, and can through digital or the simulation-like input and the output, controls each type the machinery or the production process. PLC and the related auxiliary equipment should according to form a whole easy with the industrial control system, easy to expand its function the principle to design.”In the 21st century, PLC will have a bigger development. Technologically speaking, computer technology's new achievement more will apply in the programmable controller's design and the manufacture, will have the operating speed to be quicker, the storage capacity to be bigger, an intelligent stronger variety to appear; Looked from the product scale that further develops to subminiature and the ultra-large direction; Looked from the product overcoatability that the product variety will be richer, the specification to be more complete, the perfect man-machine contact surface, the complete communication facility will adapt each industrial control situation demand well; Looked from the market that various countries will produce the multi-variety product the situation to break respectively along with the international competition aggravating, will present the minority several brand monopoly international market the aspect, will present the international general programming language; Looking from the network state of play, the programmable controller and other industrial control computer networkconstitution large-scale control system is the programmable controller technology development direction. Present computer collection and distribution control system DCS (Distributed Control System) had the massive programmable controller application. Is following computer network's development, the programmable controller takes the automation directed net and the international universal network important component, outside industry and industry numerous domain display more and more major function.2. Inverter technology development trendsInverter into the practical phase of more than 1 / 4 century during this period, the frequency converter technology as the basis of power electronics technology and microelectronics technology manager of a leap in the development, as the new power electronic devices and high-performance microprocessor The application of control technology and the development of increasingly high cost performance of the inverter, more and more small size, but manufacturers are still in constant frequency converter to achieve the further miniaturization and doing new efforts. From a technical point of view, with the frequency converter to further expand the market of the future, with the converter and inverter technology will be on the development of technologies in the following areas further development:(1) large capacity and small size;(2) high-performance and multi-function;(3) enhance the ease-of-use;(4) increase in life expectancy and reliability;(5) of pollution-free.Large capacity and small size of the power semiconductor devices will be with the development of continuous development. In recent years, driven by a voltage power semiconductor devices IGBT (Isolated Gate Bipolar Transistor, isolation gate bipolar transistors) has developed very rapidly and quickly into the traditional use of BJT (bipolar power transistor) and power MOSFET (FET) The various fields. In addition, the IGBT switching device for the IPM (Intelligent Power Module, IPM) and Monolithic Power IC chip will power switching devices and driving circuit, such as the protection of integrated circuits in the same package, with high performance andreliability The merits, with their high current and high pressure of the development of small and medium-sized converter will certainly be more widely used.With micro-electronics technology and semiconductor technology development, for Inverter CPU and semiconductor devices and a variety of sensors of getting higher and higher. With the frequency converter technology and the development of the growing maturity of the exchange governor, modern control theory are constantly new applications. These have further improved the performance of inverter provided the conditions. In addition, with the frequency converter to further promote the use and support are also constantly made new demands, the frequency converter manufacturers to continuously improve the performance and frequency converter functions in Inverter new efforts to meet user And the need for the fierce competition in the market in an invincible position.With the frequency converter market continues to expand, how to further enhance the ease-of-use inverter, so that the technical staff and even ordinary non-technical staff can quickly master the use of frequency converter technology has become manufacturers must consider the issue. Because only easy-to-use products can continue to acquire new customers and further expand the market, so the future of the new converter will be more easy to operate.With the development of semiconductor technology and the development of power electronics technology, the frequency converter used in the various components of the life and reliability are constantly improving, they will make their own life and the frequency converter to further increase reliability.In recent years, people have attached great importance to environmental issues, and thus a "green products" name. Therefore, the inverter, must also consider its impact on the surrounding environment.Promote the use of the frequency converter in the early stages of the noise problem was once a big problem. With the low-noise converter IGBT the emergence of this issue has basically been resolved. However, with the noise problem to solve, people's looks and a converter to the surrounding environment and the impact of other continuously explore new solutions. For example, the use of a diode-voltage converter and PWMinverter circuit converter, the frequency converter itself the high harmonics will bring supply voltage and current distortion, and at the same power to affect the other equipment. However, through the use of the frequency converter Rectifier circuit PWM, we can basically solve the problem. Although because of price and control technology and other aspects of the reasons for the current PWM converter has not been promoting the inverter, but, with the frequency converter technology development and the people of the importance of environmental issues.PLC及变频器技术的发展趋势1．可编程控制器的发展趋势可编程控制器是一种数字运算操作的电子系统，专为在工业环境下应用而设计。

变频器外文翻译文献

变频器外文翻译文献(文档含中英文对照即英文原文和中文翻译)外文:Converter reference design(1)Converter Selection:Selection to determine the frequency converter when the following points:1) The purpose of a variable frequency; constant pressure to control or constant current control.2) the load converter types such as leaves or pump volume pumps, with special attention to load the performance curve, the performance curve of the decision of the ways and means.3) the frequency converter and load matchingVoltage match: a rated voltage converter with a rated voltage line with the load. Current matches: ordinary pump, the rated current inverter and motor rated current match. For special load such as deep-water pumps, and so on need to refer to the electrical performance parameters to determine the most current inverter current and Guozainengli.Torque match: in this case constant torque load or slow down when the device may have occurred.4) the use of high-speed motor drive inverter, because of the high-speed motor, anti-small, high harmonics lead to increased output current value increases. So for high-speed motor inverter Selection, its capacity to be slightly larger than the ordinary motor selection.5) If the frequency converter to a long cable run, this time to take measures to curb the long cable to the impact of capacitive coupling, inadequate efforts to avoid converter, so in this case, the drive to enlarge the capacity of a file or the converter Output installed output reactor.6) For the application of some special occasions, such as high temperatures, high altitude, at this time would cause the down converter capacity, the drive to enlarge the capacity of a block.(2) inverter control schematic design:1) First confirmation of the installation environment ConverterOperating temperature: high-power converter is the internal electronic components, vulnerable to the effects of temperature, product general requirementsfor 0 ~ 55 ℃, but in order to ensure the safe, reliable, the use of room to be taken into account, the best control in 40 ℃below. In the control box, the converter box should generally be installed in the upper and strictly comply with the Manual of installation requirements, absolutely not be allowed to heating elements or components easily fever close to the converter installed at the bottom.Ambient temperature: the temperature is too high and large temperature changes, within easy converter there is dew, the insulation properties will be greatly reduced,or even short-circuit caused the accident. When necessary, to be added to the desiccant in the box and heater. In water treatment, generally heavier than water vapor, if the temperature changes, then this problem would be more prominent.Corrosive gases: the use of the environment if the corrosive gas concentrations, will not only lead corrosion of components, printed circuit boards, but it will also accelerate the aging of plastic devices, reducing insulation properties.Vibration and shock: the control cabinet with converter by vibration and mechanical shocks will cause electrical connection is bad. Huaian thermoelectric there such a problem. Apart from raising the control cabinet at this time of the mechanical strength, vibration and shock away from the source, we must also use seismic rubber pad fixed within and outside the control cabinet, such as electromagnetic switches have a vibration components. Equipment operation after a period of time and should conduct inspections and maintenance.Electromagnetic interference: Inverter at work due to rectification and frequency, produce around a lot of electromagnetic interference, these high-frequency electromagnetic waves in the vicinity of the instrument, apparatus, a certain interference. Therefore, the cabinet instrumentation and electronic systems, it should be optional metal, shielding the inverter instrument interference. All the components should be reliable grounding, in addition, the electrical components, equipment andinstrumentation should use the connectivity between the shielding control cables, and the shield should be grounded. If handled properly electromagnetic interference, often cause the entire system does not work, leading to the control unit failure or damage.2) Drives and determine the distance between the electrical cables and wiring methodsDrives and motor the short distance should be as much as possible. This reduces the capacitance of the cable, reducing the emission source of interference.Control cables optional shielded cable, power cable or optional shielding from the cable converter to use all the threads of the electrical shield.Electric cables should be independent of the other cable alignment, the minimum distance of 500 mm. At the same time should avoid the electrical cables and other long-running cable lines, in order to reduce the output voltage inverter rapid changes in the electromagnetic interference. If the control cables and power cables cross, as far as possible so that they cross the 90-degree angle. Converter and analog signals on the line and back to the main line of separation of alignment, even in the case also in the control cabinet.And the analog signal converter line the best choice of unshielded twisted pair, shielded power cables selection of the three-core cable (its specifications than ordinary electrical cables in the files) or to comply with the user manual converter.3) inverter control schematicsMain circuit: the role of reactor is to prevent the high-frequency converter harmonic power through the input circuit to return to the grid by the impact of other electronic devices, in accordance with the capacity size converter to decide whether to increase reactor; filter Converter is installed in the output, the output of high-frequency converter to reduce harmonics, when the electrical inverter to the longer distance, we should install filters. Although the frequency converter itself has all kinds of protection, but the lack of protection is not perfect, the main circuit breaker played overload, lack the same protection, selection, in accordance with the capacity to choose the frequency converter. Converter itself can be used to replace thermal overload protection relay.Control loop: the frequency with the frequency manually switch to the failure frequency can be manually cut-operation, not because of output voltage, frequency and frequency-be interlocked.4) Inverter groundingInverter correct grounding is to improve the system stability, the ability to inhibit an important means of noise. Inverter grounding resistance grounding terminal of the smaller the better, the grounding wire cross-section of not less than 4 mm, the length of not more than 5 m. Inverter should be grounded and power equipment to the sites separately, not in total. The shield signal converter from one end of the grounding end, the other floating air. Inverter and control of electrical between the same counter.(3) Inverter Control DesignConverter should be installed in the control cabinet internal control counters in the design should pay attention to the following issues1) heat: Inverter fever is the internal loss. In the frequency converter in the main part of the loss mainly to the main circuit, or about 98 percent, accounting for 2% of control circuits. In order to ensure reliable operation of the normal inverter, Thermal must inverter are usually used for cooling fan; converter fan of the contents of the converter box can be removed internal heat, if the fan does not work, should immediately stop inverter Operation; the high-power inverter also need to increase control Guishang fan, Control of the wind, to design a reasonable, all outlet into the net to set up dust, exhaust open, to avoid over the counter in a swirl, in a fixed location dust Accumulation, according to the statement converter ventilation fans to select the match, fans installed to the attention of earthquake problems.2) the problem of electromagnetic interferenceConverter in its work due to rectification and frequency, produce around a lot of electromagnetic interference, these high-frequency electromagnetic waves in the vicinity of the instrument, apparatus, a certain interference, and will produce high harmonics, the high harmonics will be available for adoption Xinhua loop into the whole power supply network, thus affecting other instruments. If the power inverter system as a whole lot of more than 25 percent, to be considered the anti-jammingmeasures to control supply.When the system in the high-frequency welding machine such as the impact load, electroplating power, the converter itself will appear as interference protection, to consider the whole system of power quality problems.3) protection issues need to pay attention to the following pointsWaterproof anti-condensation: If the converter on the scene, the need to pay attention to the frequency converter Guishang not have the flange or other pipeline leak, the inverter can not be near the water splash, sum up the scene OEM Switchgear Kits & level of security to IP43 above.BOOT: All outlet into the net to set up dust debris into the barrier floc, dust network should be designed to be removable, to facilitate the clean-up, maintenance. Dust of the grid network in accordance with the specific circumstances at the scene determined that dust around the net and Control Department to handle the combination of tight.Anti-corrosive gases: the chemical industry in this relatively Most of this can be on the frequency counters in the control room.(4) converter cable normsSignal lines and power lines must be separately alignment: the use of analog signal converter for remote control, in order to reduce the analog converter and other equipment from the interference, please control signal converter line with the strong electric circuit (H Circuit-and-loop) separate alignment. Distance should be 30 cm above. Even in the control cabinet, the same connection to maintain such a standard. The signal converter and the control should not be longer than the road back to 50 m. Signal lines and power lines must be placed in different metal pipe or metal hose internal: connect PLC and the signal converter if not placed in metal tubes, Drives and vulnerable to external interference equipment; because the converter No built-in the reactor, so the converter input and output level of external power line will have a very strong interference, placing the signal lines of metal or metal hose has to be extended to the inverter control terminal, to ensure that the signal Line and the complete separation of power lines.1) analog control signal line should use two-strands shielding line, cable specifications for 0.75 mm2. When the wiring must pay attention to, to the extent possible, the cable Baoxian short (5-7 mm or so), while Bao Xian after the shield should wrap insulating tape to prevent shielding lines and other equipment contact with the introduction of interference.2) To improve the simple wiring and reliability, signal recommend the use of online video pressure bar.(5) converter and the operation of the relevant parameters setInverter setting parameters, the parameters of each have a certain range of options, often encountered in the use of individual set of parameters for misconduct, leading converter does not work phenomenon.Control: that is, speed control, transferred from the control, PID control or other means. To take control, according to the general control precision, the need for static or dynamic identification.Running a minimum of: that is, the minimum speed motor running, the motor running at low speed, its poor performance cooling, electrical long run on low speed, it can cause burning motor. And at low speed, the cable will increase in the current, cable will lead to fever.The maximum operating frequency: the general maximum frequency converter to 60 Hz, and some even to 400 Hz, high-frequency will enable high-speed motor operation, which the ordinary motor, its bearings can not be over-speed long run, whether the motor rotor To be capable of such a centrifugal force.Carrier frequency: the higher the carrier frequency setting its high harmonics greater weight, and the length of cable, the electrical heating, cable converter fever fever and other factors are closely related.Electrical parameters: the frequency converter to set parameters of the motor power, current, voltage, speed, maximum frequency, these parameters can be directly in the motor nameplate.FH: In a frequency point, there may be a resonance phenomenon, particularly in the relatively high when the entire device in control of the compressor, thecompressor to avoid the surge point.(6) common fault analysis1) flow failure: over-current fault can be divided into acceleration, deceleration, constant speed over-current. May be due to the increase in frequency converter too little time to slow down, load mutations, the unequal distribution of load, output short-circuit, and other causes. At this time can be extended by the general acceleration and deceleration time, reduce the load of mutations, plus braking energy components, load distribution design, the lines to be checked. If off-load converter ora failure that has been Central converter inverter circuits, to be replaced converter.2) overload fault: overload fault, including frequency and overload the electrical overload. May be accelerated their time is too short, too low voltage power grids, Fuzaiguochong and other causes. General can be accelerated through the extension of time to extend the braking time, such as check-voltage power grid. Fuzaiguochong, selected motor and inverter can not drag the load, but also may be due to poor machinery lubrication caused. If the former is the need to replace high-power motors and inverter, if the latter will have to carry out maintenance on production machinery.3) under-voltage: the importation of some of the power inverter that there are problems, need to check before you can run.变频器设计使用参考（1）变频器选型：变频器选型时要确定以下几点：1) 采用变频的目的；恒压控制或恒流控制等。

三相,电能质量改进的直交变频器外文翻译

毕业设计(论文)外文资料翻译学院：专业：姓名：学号：外文出处：Electric Power Systems Research78(2008)276-289附件： 1.外文资料翻译译文；2.外文原文。

指导教师评语：签名：年月日附件1：外文资料翻译译文三相，电能质量改进的直/交变频器概要除了谐波功率和无功功率的其他来源，电力电子变频器的广泛使用大大影响着谐波的产生和在电力系统的无功潮流。

单相，电能质量改进的变频器在国内设计，开发和成功应用，商业和工业环境已经使三相，电能改进的变频器的设计和发展成为可能，而且它们广泛使用在不同的应用。

本文将对三相，电能改进的变频器配置，控制方法，对供应方和负载性能的输入功率因数计算，总谐波失真和完善管理，缩减波纹直流输出，额定功率，成本和特定应用选择做全面的探讨。

它还提供了国家在电能质量改善的变频器对工作在三相，开关式交直交变频器的研究人员，设计师和工程师而言最先进的技术。

内容1 说明交直交电源变频器广泛应用于各种应用，如电源供应器、直流马达驱动，调速交流驱动器、直流输出、开关电源前端变频器、实用接口与非传统能源来源。

在工艺技术，如焊接、电信系统的电源供应器、航空航天、军事环境等。

传统上，交直交电源变频器已主要由二极管或作为对电力系统非线性负载和在谐波的丰富，供应不足的功率因数的相控整流器作为借鉴，然而出现了配电网络和附近其他电器的整流系统的电能质量问题。

其他与这些变频器相关的问题包括：（1）从要求配电设备的处理大功率的电力系统大量无功功率由整流器得出，从而增加其伏安评级。

（2）电压在总线下降。

（3）较高的输入电流谐波导致扭曲的线电流，往往扭曲线电压波形。

这往往造成在同一总线上的敏感设备可靠运行的问题。

（4）在设备中增加损失（由于谐波）如变压器和电机连接到实际应用。

（5）与附近的通信线路电磁干扰。

（6）由于来自共振的高电压和电流与线路阻抗和电容故障，保险丝对电容器功率因数校正。

毕业设计外文翻译：在频率变运行过程中存在的疑问和对策

In the frequency changer movement process existsquestion and countermeasureThis paper analyzed the problem of harmonic wave, matching of load andcalorification for inverters in running, and made the relatively the measure.Keywords: inverter harmonic wave loading calorification1 forewordhas entered the Chinese market since the 80's general frequency changers, obtained the extremely widespread application in the short several year time.At present, the general frequency changer by its merits and so on intellectualization, digitization, network more and more receives people's favor.Along with the general frequency changer application scope expansion, the question which exposes more and more are also many, mainly has following several aspects:① Overtone question ② Frequency changer matching of load question ③ Gave off heat abovethe question these questions already to cause the related control section and the factory and mine attention and has formulated the related technical standard.If the overto ne question, our country and in 1993 passed “the electrical power system overtone management temporary provisions” in 1984 and the GB/T-14549-93 standard, with limits the power supply system and the current collector overtone pollution. In view of the above question, this article carried on has analyzed and proposed the solution and the countermeasure.2 overtone questions and the countermeasuregeneral frequency changer main circuit form is composed generally by three parts: Rectification part, contravariant part and filter part.The rectification part for the three-phase bridge type uncontrolled rectifier, the invertor part is the IGBT three-phase bridge type invertor, also the output is the PWM profile.Regarding the bipolarity modulation frequencychanger.because the general frequency changer rectification part uses the diode uncontrolled bridge type leveling circuit, the middle filter part uses the big electric capacity to take the filter, therefore the rectifier input current in fact is the capacitor charging current, assumes a higher more and precipitous pulse wave, its harmonic component is big.For the harmonic cancellation, may use following countermeasure:①Increase frequency changer electric power supply internal resistance In the usual situation, the power equipment internal resistance may play the cushion frequency changer cocurrent filter electric capacity reactive power role.This kind of internal resistance is the transformer short-circuit impedance.When power source capacity relative frequency changer capacity hour, then internal resistance value relative bigger, the harmonic content is smaller; When the power source capacity relative frequency changer capacity is bigger, then internal resistance value relative bigger, the harmonic content is bigger. Regarding Mitsubishi FR-F540 series frequency changer, when internal resistance is 4%, may play the very good harmonic suppression role .Therefore time choice frequency changer electric power supply transformer, best choice short-circuit impedance big transformer.(2) Installs the reactor to install the reactor in fact from exterior increase frequency changer electric power supply internal resistance. Installs the direct current reactor in the frequency changer exchange side installment exchange reactor or in the frequency changer direct current side, or also installs, suppression harmonic current. The table as soon as listed the Mitsubishi FR-A540 frequency changer to install the reactor and not to install the reactor the content comparative table.(3) The transformer heterogeneity movement general frequency changer rectification part is six pulse waves rectifiers, therefore produces the overtone is bigger. If applies the transformer the heterogeneity movement, causes mutually to miss 30° like Y- △, △ - △ the combination two transformers constitution is equal to 12 pulse waves effects may reduce the harmonic current 28%, played the very good harmonic suppression role.(4) Adjusts the frequency changer the carrier compared to from (1), (2), (3) the formula may see, so long as the carrier enough is bigger than, comparatively 低次the overtone may effectively suppress, specially the reference wave peak-to-peak value and the carrier peak-to-peak value are smaller than 1 o'clock, 13 below odd number overtone no longer appears.(5) Special-purpose filter this special-purpose filter uses in to examine the frequency changer harmonic current the peak-to-peak value and the phase, and produces to be same also the phase just right opposite electric current with the harmonic current peak-to-peak value, passes through in the frequency changer, thus may extremely effectively absorb the harmonic current.3 matchings of load question and its the countermeasure produce machinery the type to be many, performance and technological requirement respectivelydifferent,its torque characteristics is complex, roughly divides into three kind of types: The permanent torque loading, the air blower pump a kind of load and the permanent power load. In view of the different load type, should choose the different type the frequency changer.(1) The permanent torque loading permanent torque loading is refers to the load moment to have nothing to do with with the rotational speed, under any rotational speed, the torque maintains constantly. The permanent torque loading divides into the friction class load and the potential energy type load. About friction class load starting moment general request nominal torque 150%, about brake torque general request nominal torque 100%, therefore the frequency changer should choose these to have the constant torque characteristics, and starts and the brake torque all quite big, the overload time is long and the overload capacity big frequency changer. If Mitsubishi frequency changer FR-A540 series. The potential energy type load generally requests the big starting moment and the energy back coupling function, can fast realize is reversing, the frequency changer should choose has four quadrants running ability the frequency changer. If Mitsubishi frequency changer FR-A241 series. (2) air blower pumps the kind of load air blower to pump a kind of load is present industry field application mostequipment, although pumps the gentle breeze machine characteristic many and varied, but mainly by the centrifugal pump and the centrifugal air blower application primarily, the general frequency changer are most in this kind of load application. The air blower pumps a kind of load is one square torque loading, its rotational speed n and current capacity Q.May see from the previous type, the air blower load system rotation inertia computation is wants extremely again. When frequency changer concrete design, presses down the type computed result, carries on the suitable revision, starts when the frequency changer in the situation which does not have the class to trip decelerates with the frequency changer when does not occur 过电压 trips, choice shortest time.Pumps a kind of load in the actual movement process, is easy to have the buzz, the build the pressure and the water hangs the effect, therefore time frequency changer shaping, must choose is suitable for to pump a kind of load the frequency changer also the frequency changer when the function hypothesis must aim at the above question to carry on alone establishes:Buzz: Surveys easily to have the buzz frequency spot, jumps the frequency through the hypothesis and the width, avoids the phylogeny resonance effect. Build the pressure: Pumps a kind of load when the low speed movement, causes the current capacity as a result of the system build the pressure is zero, thus creates pumps burn outs. When frequency changer function hypothesis, through defines the frequency changer the most low frequency, but had defined pumps the current capacity the critical point place system lowest rotational speed, this has avoided this kind of phenomenon occurrence.The water hangs the effect: Pumps a kind of load when the sudden power failure, as a result of pumps in the pipeline the liquid gravity to flow backwards. If the check valve is lax or does not have the check valve, will cause the electrical machinery reverse, will cause the frequency changer because of the electrical machinery electricity generation to break down to report to the police burn outs. When frequency changer system design, should cause the frequency changer to stop according to the deceleration curve, separates the main circuit electricity again after electrical machinery dead stop, or thehypothesis "the power failure decelerates stops" the function, has like this avoided this phenomenon occurrence.(3) The permanent power loadpermanent power load is refers to the torque roughly with to transfer the intensive inverse ratio the load, like coiler, opening a book machine and so on. Actuates the permanent power load when using the frequency changer, should be, the usual consideration which speaking of the certain speed change scope below some rotational speed selects the permanent torque velocity modulation method, but when is higher than this rotational speed only then selects the permanent power velocity modulation method. We usually are called this rotational speed spot the base frequency, this point correspondence voltage for frequency changer output rated voltage.Theoretically speaking, must want to realize in the true significance permanent power control,Frequency changer output frequency f and output voltage U must follow the U2/f=const coordination control, but this is does not permit in the actual frequency changer movement process, because above the base frequency, the frequency changer output voltage cannot increase along with its output frequency, only can maintain the rated voltage,therefore only can be in one kind of approximate significance permanent power control.4 gives off heat the question and its the countermeasureFrequency changer giving off heat is produces by the internal loss. In the frequency changer in each part of losses mainly by the main circuit primarily, approximately composes 98%, the control circuit accounts for 2%. In order to guarantee the frequency changer normal reliable movement, must carry on the radiation to the frequency changer, usually uses following method:(1) Uses the ventilator radiation: The frequency changer internal installation ventilator may carry off the frequency changer box body interior radiation, if the ventilator cannot the normal work, be supposed to stop the frequency changer movement immediately.(2) Reduces installs the ambient temperature: Because the frequency changer is the electronic installation, content electron Yuan, electrolysiselectric capacity and so on, therefore the temperature quite is big to its life influence. The general frequency changer environment operating temperature generally requests -10 ℃ ~-50 ℃, if can take the measure to reduce the frequency changer operating temperature as far as possible, then the frequency changer service life lengthens, the performance quite is also stable.We adopt two methods: One method is the construction independent frequency changer low pressure, the interior installs the air conditioning, the maintenance low pressure the temperature in +15 ℃ ~+20 ℃ between. Another method is the frequency changer installment space needs to satisfy the frequency changer instruction for use the request.Above talks about the frequency changer gives off heat is refers to the frequency changer in the fixed scope the normal operation loss. When the frequency changer has the unusual movement (for example class, crosses pressure, the loss which overload and so on) produces must avoid this kind of phenomenon through the normal shaping the occurrence.Pumps a kind of load regarding the air blower, when we choose Mitsubishi frequency changer FR-F540, its overload can be 1.20%/6 million second, its overload cycle is 300 seconds, in other words, when the frequency changer is opposite to its rated load 120% overload, it the duration is 60 seconds, and does not allow within 300 seconds to appear the second overload. When the frequency changer appears the overload, the power unit because it has flowed the excess current elevates temperature, causes the frequency changerheat,by now had to cause its temperature decrease to cause the frequency changer the hot protection movement as soon as possible to eliminate, this undercooling was the frequency changer overload cycle. The different frequency changer, its overload multiple, the overload time and the overload cycle are not same, and its overload multiple bigger,the overload time is shorter,Electrical machinery actuates which regarding the frequency changer, may divide into two kinds according to its working condition: Long lasting worksystem and repetition short-term operation system. The long lasting work system electrical machinery may according to its name brand stipulation data long-term movement. In view of this kind of load, the frequency changer may carry on the shaping according to the electrical machinery data plate data, like continuous running oil pump, if its electrical machinery power is time 22kW, may choose the FR-F540-22k frequency changer then.The repetition short-term operation system electrical machinery, its characteristic is the duplication and the short time, namely the electrical machinery operating time and the idle time time carry on in turn, moreover quite is all short, sum of the two, according to the country stipulated does not have to surpass for 60 seconds. The repetition short-term operation system electrical machinery permits its overload also has certainly certainly Temperature elevation.This time, if chooses the frequency changer according to the electrical machinery data plate data, inevitably will create the frequency changer the damage. In view of this kind of load, the frequency changer in the reference electrical machinery data plate data situation must according to the electrical machinery load diagram and the frequency changer overload multiple, the overload time, the overload cycle comes the shaping. If duplicates the short-time movement the elevator, its electrical machinery power is 18.5kW, may choose the FR-A540-22k frequency changer.5 conclusionsthis article through has the problem to the general frequency changer movement process in the analysis, proposed solves these questions actual countermeasures, along with the new technology and the new theory unceasingly on the frequency changer application, these questions which the frequency changer exists hopefully and compensates through the frequency changeritselffunction solves. Unceasingly enhance along with the industry scene and the social environment to the frequency changer request, meets the actual needs the falsehood "the green" the frequency changer also to be able soon to appear on the market.6 references(1) Han Anrong General frequency changer and its application Beijing: Mechanical industry publishing house, 2,000(2)Mitsubishi frequency conversion velometer FR-A500 user's manual(3)Mitsubishi frequency conversion velometer FR-F500 user's manual在频率变运行过程中存在的疑问和对策本文针对变频器运行过程中存在的谐波问题、负载匹配问题和发热问题，进行了分析，并提出了相对应的解决方案自从 80 年代以来频率变进入中国市场, 在那短好几年时间获得广泛的应用。

基于IGBT的变频电源设计论文中英文翻译

英文资料及中文翻译The Design of a Rapid Prototype Platform for ARM BasedEmbedded SystemHardware prototype is a vital step in the embedded system design. In this paper, we discuss our design of a fast prototyping platform for ARM based embedded systems, providing a low-cost solution to meet the request of flexibility and testability in embedded system prototype development. It also encourages concurrent development of different parts of system hardware as well as module reusing.Though the fast prototyping platform is designed for ARM based embedded system, our idea is general and can be applied to embedded system of other types.I.INTRODUCTIONEmbedded systems are found everywhere, including in cellular telephones, pagers, VCRs, camcorders, thermostats, curbside rental-car check-in devices, automated supermarket stockers, computerized inventory control devices, digital thermometers, telephone answering machines, printers, portable video games, TV set-top boxes -- the list goes on. Demand for embedded system is large, and is growing rapidly.In order to deliver correct-the-first-time products with complex system requirements and time-to-market pressure, design verification is vital in the embedded system design process. A possible choice for verification is to simulate the system being designed. If a high-level model for the system is used, simulation is fast but may not be accurate enough, with a low-level model too much time may be required to achieve the desired level of confidence in the quality of the evaluation. Since debugging of real systems has to take into account the behavior of the target system as well as its environment, runtime information is extremely important. Therefore, static analysis with simulation methods is too slow and not sufficient. And simulation cannot reveal deep issues in real physical system.A hardware prototype is a faithful representation of the final design, guarantying its real-time behavior. And it is also the basic tool to find deep bugs in the hardware. For these reasons, it has become a crucial step in the whole design flow. Traditionally, a prototype is designed similarly to the target system with all the connections fixed on the PCB (printed circuit boards).As embedded systems are getting more complex, the needs for thorough testing become increasingly important. Advances in surface-mount packaging and multiple-layer PCB fabrication have resulted in smaller boards and more compact layout, making traditional test methods, e.g., external test probes and "bed-of-nails" test fixtures, harder to implement. As a result, acquiring signals on boards, which is beneficial to hardware testing and software development, becomes infeasible, and tracking bugs in prototype becomes increasingly difficult. Thus the prototype design has to take account of testability. However, simply adding some test points is not enough. If errors on the prototype are detected, such as misconnections of signals, it could be impossible to correct them on the multiple-layer PCB board with all the components mounted. All these would lead to another round of prototype fabrication, making development time extend and cost increase.Besides testability, it is important to maintain high flexibility during development of the prototype as design specification changes are common. Nowadays complex systems are often not built from scratch but are assembled by reusing previously designed modules or off-the-shelf components such as processors, memories or peripheral circuitry in order to cope with more aggressive time-to-market constraints. Following the top-down design methodology, lots of effort in the design process is spent on decomposing the customers, requirements into proper functional modules and interfacing them to compose the target system.Some previous research works have suggested that FPLDs (field programmable logic device) could be added to the final design to provide flexibility as FPLDs can offer programmable interconnections among their pins and many more advantages. However, extra devices may increase production cost and power dissipation, weakening the market competition power of the target system. To address these problems, there are also suggestions that FPLDs couldbe used in hardware prototype as an intermediate approach [1]-[3], whereas this would still bring much additional work to the prototype design. Moreover, modules on the prototype cannot be reused directly. In industry, there have been companies that provide commercial solutions based on FPLDs for rapid prototyping [4]. Their products are aimed at SOC (system on a chip) functional verification instead of embedded system design and development.In this paper, we discuss our design of a Rapid Prototyping Platform for ARM based Embedded System, providing a low cost solution to meet the request of flexibility and testability in embedded system prototype development. It also encourages concurrent development of different parts of system hardware as well as module reusing. The rest of the paper is organized as follows. In section 2, we discuss the details of our rapid prototyping platform. Section3 shows the experimental results, followed by an overall conclusion in section4.II. THE DESIGN OF A RAPID PROTOTYPING PLATFORMA. OverviewARM based embedded processors are wildly used in embedded systems due to their low-cost, low-power consumption and high performance. An ARM based embedded processor is a highly integrated SOC including an ARM core with a variety of different system peripherals[5]. Many arm based embedded processors, e.g.[6]-[8], adopt a similar architecture as the one shown in Fig.1.The integrated memory controller provides an external memory bus interface supporting various memory chips and various operation modes (synchronous, asynchronous, burst modes). It is also possible to connect bus-extended peripheral chips to the memory bus. The on-chip peripherals may include interrupt controller, OS timer, UART, I2C, PWM, AC97, and etc. Some of these peripherals signals are multiplexed with general-purpose digital I/O pins to provide flexibility to user while other on-chip peripherals, e.g. USB host/client, may have dedicated peripheral signal pins. By connecting or extending these pins, user may use these onchip peripherals. When the on-chip peripherals cannot fulfill the requirement of the target system, extra peripheral chips have to be extended.The architecture of an ARM based embedded system is shown in Fig. 2. The whole system is composed of embedded processor, memory devices, and peripheral devices. To enable rapid prototyping, the platform should be capable of quickly assembling parts of the system into a whole through flexible interconnection. Our basic idea is to insert a reconfigurable interconnection module composed by FPLD into the system to provide adjustable connections between signals, and to provide testability as well. To determine where to place this module, we first analyze the architecture of the system.The embedded system shown in Fig. 2 can be divided into two parts. One is the minimal system composed of the embedded processor and memory devices. The other is made up of peripheral devices extended directly from on-chip peripheral interfaces of the embedded processor, and specific peripheral chips and circuits extended by the bus.The minimal system is the core of the embedded system, determining its processing capacity. The embedded processors are now routinely available at clock speeds of up to 400MHz, and will climb still further. The speed of the bus connecting the processor and the memory chips is exceeding 100MHz. As pin-to-pin propagation delay of a FPLD is in the magnitude of a few nanoseconds, inserting such a device will greatly impair the system performance.The peripherals enable the embedded system to communicate and interactive with the circumstance in the real world. In general, peripheral circuits are highly modularized and independent to each other, and there are hardly needs for flexible connections between them.Here we apply a reconfigurable interconnection module to substitute the connections between microcomputer and the peripherals, which enables flexible adjusting of connections to facilitate interfacing extended peripheral circuits and modules. As the speed of the data communication between the peripherals and the processor is much slower than that in the minimal system, the FPLD solution is feasible.Following this idea, we design the Rapid Prototyping Platform as shown in Fig. 3. We define the interface ICB between the platform and the embedded processor core boar that holds the minimal system of the target embedded system. The interface IPB between the platform and peripheral boards that hold extended peripheral circuits and modules is also defined. These enable us to develop different parts of the target embedded system concurrently and to compose them into a prototype rapidly, and encourage module reusing as well. The two interfaces are connected by a reconfigurable interconnect module. There are also some commonly used peripheral modules, e.g. RS232 transceiver module, bus extended Ethernet module, AC97 codec, PCMCIA/CompactFlash Card slot, and etc, on the platform which can be interfaced through the reconfigurable interconnect module to expedite the embedded system development.。

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PLC及变频器技术论文中英文资料对照外文翻译文献综述

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三相,电能质量改进的直交变频器外文翻译

毕业设计外文翻译：在频率变运行过程中存在的疑问和对策

基于IGBT的变频电源设计论文中英文翻译

变频器毕业论文外文翻译