大功率开关电源就是用通过电路控制开关管进行高速的导通与截止。将直流电转化为高频率的交流电提供给变压器进行变压，从而产生所需要的一组或多组电压。
因此，高功率因数的大功率开关电源成为研究的热门。
Therefore, the high power factor high-power Switching-Mode power supply becomes the major topic of discussion studying.
大功率开关电源一般采用三相二极管整流桥作为前级整流电路。
The switching power supply usually uses the diodes rectifier as the front converter.
利用大功率开关电源技术研制出新一代的IGBT逆变式恒电位仪。
A new generation of IGBT inverse constant potential instrument is developed by using powerful switching power supply technology.
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