【摘要】 在提出的一款谐振型桥式模块化多电平开关电容变换器拓扑基础上,提出了移相加PWM的控制策略。该控制策略实现了变换器高频开关(MOSFET)的零电流、零电压开关,并在保证变换器较高效率运行的基础上,实现了变换器输出电压的可调性,解决了回路峰值电流过大或过小的问题。详细分析了开关电容变换器高频开关移相角与输出电压和回路峰值电流之间的关系,并通过仿真软件SABER和硬件平台对所述控制策略下的软开关、输出电压、峰值电流特性进行了验证,仿真结果与实验结果均证实了上述结论。更多还原

【Abstract】 This paper presents a phase shift plus PWM control strategy for the novel resonant bridge modular multilevel switched-capacitor converter. The proposed method ensures that almost all switching devices keep zero current switching or zero voltage switching, which achieves a high system efficiency. Meanwhile, the output voltage is regulated and the loop peak current is limited in a proper range. The impacts of the switching phase of metal-oxide-semiconductor field-effect transistors( MOSFETs) on both the output voltage and the loop peak current are deduced,respectively. By means of simulation software Saber and hardware platform,the proposed characteristics of soft switching,output voltage,and peak current are verified well.更多还原