可实现电机输入电源功率因数的改善，减轻其容量。
It can obtain the improve of power factor of the input motor power, and can lighten its capacity.
介绍了一种借助单片机和PC机构成的开关电源功率因数分析系统。
A measuring and analysing system for power factor of switching power supply, based on MCS 51 and PC, is discussed.
分析了该电路的基本工作原理、关键参数的设计计算，仿真结果表明这种新型的单级大功率开关电源功率因数可达到0 . 995。
Moreover, its operation process principles and critical parameters are analyzed, its simulation results proved that the novel single stage high power switch source's power factor can achieve 0.995.
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