电源转换效率
电源转换效率
转换效率就是电源的输入功率与输出功率的比值：即电源转换效率=电源为主机提供的即时输出功率/输入电源的即时功率×100%。
重点介绍
转换效率就是电源的输入功率与输出功率的比值：即电源转换效率=电源为主机提供的即时输出功率/输入电源的即时功率×100%。
一般来说，PC电源规范对转换效率有着一定的要求。最初电源转换效率仅有60%左右，在Intel的ATX12V 1.3电源规范中，规定电源的转换效率满载时不得小于68%，
而在ATX 12V 2.01中，对电源的转换效率提出了更高的要求──不得小于80%。因此在购买电源时，从它遵循的电源规范上大家就能大致了解其电源转换效率的高低。
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电源转换率是什么意思？
add4q4ox16m|Lv3|被浏览75次2013-03-06 18:51
比如我额定230W的电源 230*0.8等于184
是不是我只能配满载功耗184的主机？？
还有 帮我看下这配置能配什么样的显卡 E5700 G41 2G DDR3 1333 WD500G 硬盘 一个光驱· 电源才额定230W
满意回答检举|2013-03-06 22:20
1. 你那个算法是不对的。转换效率是指电源实际输出的功率和实际消耗的功率之比。由于电源工作时会发热，所以会浪费一部分功率，这个比值肯定会低于100%。
所以，转换效率越高的电源就越省电，跟能带什么配件是没关系的。
2. CPU和显卡是由电源的12V输出供电的，所以能带什么显卡就要看电源的12V输出功率。ATX12V 2.3版本的额定230W电源，它的12V输出功率应该在170W左右。
E5700的满载功耗为65W，去掉其他一些配件的12V功率消耗，应该可以带动满载功耗90W以下的显卡。那么，HD5750（满载86W）是你最佳选择，价格不贵，性能也不错。
另外，你最好能写一下你的电源铭牌参数或贴个图，我帮你看一下。
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如何提高开关电源的转换效率？
a3962584|Lv3|被浏览16次2013-03-27 9:04
电路转换效率只有60%，震荡频率54KHz,开关管B极波形是方波，变压器采用EE16磁芯。
满意回答检举|2013-03-27 21:46
开关电源的损耗主要有变压器线圈的直流电阻损耗，这个频率越高损耗越小。
磁芯涡流损耗，磁芯要工作在合适的频率范围和磁感应强度上过饱和则易损坏开关管，损耗也大。再一个损耗就是开关管，频度越高损耗越大，
开关管B极波形是不是方波不大要紧，输出的集极或漏极电压波形一定要是方波，变形则损耗增大，开关电源的效率一般能太到80左右，你这个是低了些
。
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在开关电源中，PFC和转换效率有什么区别?
LevVdlcpz|Lv3|被浏览3次|来自360安全卫士2013-09-07 7:14
满意回答检举|2013-09-07 17:47
PFC指的是功率因数较正，用于调节输入电压和电流相位保持一致，提高电路的功率因数。是有效功率除以总耗电量(视在功率)的比值
转换效率是指输出功率除以输入功率。
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高频开关电源提高转换效率采用哪些措施
sls1580|Lv3|被浏览4次|来自360安全卫士2013-10-13 19:06
高频开关电源提高转换效率采用哪些措施
满意回答检举|2013-10-14 13:45
1,提高工作频率可以提高开关电源效率。这个需要在设计初做好决定。
2.正确的变压器参数也可以提高效率。这个可以多次尝试。
3.改用低阻值开关管。
4.正向管压降较小的整流二极管也可以提高效率。
5.采用低通高阻的电解电容也可以适当的提高效率。特别是空载时的效率。
6.在允许的情况下(能启动)，增大启动电阻阻值。
7.然后PCB布线也可以适当的起到一定的作用。
8.一些较新的技术，谐振变换器，同步整流等都能起到作用。
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