This paper describes a new method used for controlling convert power supply, which can make the input current to be sinus waveform, and the power factor to be 1.
提出一种新的整流电源控制策略，它可以使整流电源工作时，从电网输入的电流近似为正弦波，功率因素接近1。
In the no-load test of transformer, because of the low power factor and non-sinusoid current waveform, the high precision measurement is difficult.
变压器的空载试验中，由于功率因数低，空载电流不是正弦信号，高精度测量其有功功率具有一定的难度。
The present invention has no intermediate DC link and thus simplified circuit, low cost, less harmonic component in the voltage anc current waveform and high power factor.
本发明所设计的波形变换方法及其装置，省去了中间直流环节，使线路得以大大简化，显著降低了成本，同时使电压、电流谐波得以减小，并可获得较高的功率因数。
The current response speed is proved to be faster, and the grid-connected current waveform is sine and the power factor is unity.
获得了较快的电流响应速度，实现了并网电流的正弦化和单位功率因数。
The current response speed is proved to be faster, and the grid-connected current waveform is sine and the power factor is unity.
获得了较快的电流响应速度，实现了并网电流的正弦化和单位功率因数。
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