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首页> 外文期刊>IEEE Transactions on Industrial Electronics >Digitally Controlled Boost Power-Factor-Correction Converters Operating in Both Continuous and Discontinuous Conduction Mode
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Digitally Controlled Boost Power-Factor-Correction Converters Operating in Both Continuous and Discontinuous Conduction Mode

机译：连续和不连续导电模式下运行的数控升压功率因数校正转换器

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摘要

Whereas power-factor-correction (PFC) converters for low-power ranges (less than 250 W) are commonly designed for operation in the discontinuous conduction mode, converters for higher power levels are operated in the continuous conduction mode. Nevertheless, when these converters are operated at reduced power, discontinuous conduction mode will appear during parts of the line period, yielding input current distortion. This distortion can be eliminated by employing a dedicated control algorithm, consisting of sample correction and duty-ratio feedforward. The reduction of the harmonic distortion of the input current and the increase of the power factor are demonstrated by experiments on a 1-kW boost PFC converter.
机译：低功率范围（小于250 W）的功率因数校正（PFC）转换器通常设计为在不连续传导模式下运行，而更高功率水平的转换器则在连续传导模式下运行。但是，当这些转换器在降低的功率下工作时，在部分线路周期内会出现不连续导通模式，从而产生输入电流失真。这种失真可以通过采用专用的控制算法来消除，该算法包括样本校正和占空比前馈。通过在1kW升压PFC转换器上进行的实验证明了输入电流谐波失真的减少和功率因数的增加。

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