一种基于DSP的PFC变换器采样控制算法

A Sampling Algorithm of PFC Converter Based on DSP Controlled

为DSP控制的功率因数校正（PFC）变换器提出了一种新的采样算法，它能够很好地消除PFC电路中高频开关动作产生的振荡对数字采样的影响。尤其是当开关频率高于30kHz时，所提出的新颖采样算法能够更加有效地提高开关电路抗噪声性能。最后将此算法运用到一台2kW的PFC变换器中，实验结果证明了该算法对于分析、设计和调试所有处于开关工作状态的数字采样电路均有实际参考价值。

A novel sampling algorithm for DSP controlled power factor correction （PFC） converters is presented, which successfully avoids the influences of the oscillation brought by the operational high-frequency switching. The proposed sampling algorithm can greatly improve the switching antinoise performance, especially when the switching frequency is above 30kHz. A 2kW PFC converter based on the proposed sampling algorithm is implemented at last, and the experimental results proves the practicality of the proposed novel sampling algorithm in analysis, design and debugging of all digital sampling circuits with switching.