摘要
功率因数校正(PFC)变换器输入电压有效值前馈控制算法计算量大,且存在输入电流畸变现象。本文详细分析了PFC变换器输入电流在输入电压过零点附近产生畸变的原因,指出PFC变换器输入电流超前于输入电压是导致输入电流畸变的主要原因。通过一种输入电压前馈控制算法,简化了控制算法并提高了DSP的工作效率,改善了PFC变换器输入电流畸变现象。仿真结果证明了本文所提出的方法的有效性,特别是提高了PFC变换器对输入电压的响应速度。
Fccdforward control arithmetic calculation load of PFC input voltage effecive value is huge, and there exists input current distortion The article discusses in detail the reasons of input current distortion after the input voltage of PFC convertor passes zero point, pointing out that the major reason for input current distortion is that the input current of PFC convertor advances before the input voltage. By an input w）ltage feedforward control arithmetic, the control arithmetic is simplified, the efficiency of DSP is improved and the input current distortion of PFC convertor is mended. Simulation experiments prove that the strategy provided by this article is effective. In particular, the PFC convertor response speed to input voltage has been significantly improved
出处
《电源世界》
2012年第5期30-33,37,共5页
The World of Power Supply
