六相对称互补超大功率PFC电路的建模与设计

Modeling and Design of Six Phase Symmetrical Complementary Super Power PFC Circuit

随着电力电子设备功率等级的提高,开关器件将承受更大的电流应力,开关器件制造工艺限制了其自身的功率等级,因此单相Boost PFC电路和两相交错并联Boost PFC电路作为电力电子装置的功率因数校正环节时,其功率等级有限。为了提高功率因数校正电路的功率等级,提出了一种六相对称互补超大功率PFC电路,其功率等级比是单相Boost PFC电路的六倍,两相交错并联Boost PFC电路的三倍。首先给出了六相对称互补超大功率PFC主电路拓扑结构,然后分析了控制电路和驱动电路的设计方法,并介绍了一种实用的电压环和电流环的补偿器设计工具,应用这个工具可以选择合适的补偿器类型,调试出合适的补偿器参数。MATLAB仿真和在基于DSP的PFC实验平台的实验结果证明六相对称互补超大功率PFC电路能够实现交流输入电压与交流输入电流的同相位,并且同时实现了交流输入电流的正弦化。

In order to improve the power level of PFC circuit,this paper presents a six phase symmetrical complementary super power PFC circuit.Its power level ratio is six times of that of single-phase boost PFC circuit and three times of that of two-phase interleaved parallel boost PFC circuit.Firstly,the topological structure of the main circuit of the six phase symmetrical complementary super power PFC circuitis given,then the design method of the control circuit and the driving circuit is analyzed,and a design tool of the voltage loop and the current loop is introduced.With this tool,the appropriate type of the compensator can be selected and the appropriate parameters of the compensator can be debugged.Matlab simulation and experimental results on PFC platform basedDSPshow that thesix phase symmetrical complementary super power PFC circuit can achieve the same phase of AC input voltage and AC input current,and at the same time achieve the sinusoidal AC input current.