Boost变换器跨周期调制(PSM)的状态空间平均模型
Space State Average Model of PSM in Boost Converter
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摘要: 基于Boost变换器，利用状态空间平均法对跨周调制(Pulse Skipping Modulation，PSM)进行建模和特性分析，推导出电感电流连续(CCM)和电感电流断续(DCM)时系统变压比，调制度M与负载的关系及系统转换效率的理想化公式，得到PSM具有轻载下高转换效率的结论，并设计具有PSM调制特性的控制电路，给出仿真结果。Abstract: Based on boost converter, a new mode named PSM is modeled and analyzed using space state average method. Some useful formulae such as output voltage ratio, relationship between modulation factor and load, conversion efficiency are given in this paper. The conclusion can be easily got that PSM is an available control mode with high efficiency, especially for converter with light loads. The simulation results are given by designing the control circuit with PSM characteristic.
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