一种采用级联型多电平技术的IPT系统谐波消除与功率调节方法  

A Harmonic Elimination and Power Regulation Approach of a Cascaded Multilevel Technology in IPT Systems

作　　者：李勇[1] 麦瑞坤[1] 陆立文 何正友[1] 

机构地区：[1]西南交通大学电气工程学院,四川省成都市610031

出　　处：《中国电机工程学报》2015年第20期5278-5285,共8页Proceedings of the CSEE

基　　金：国家自然科学基金项目(51507147);铁路总公司科技研究开发计划课题(2014J013-B)~~

摘　　要：传统的感应电能传输(inductive power transfer,IPT)系统采用单相全桥谐振逆变器,由于受到功率器件的容量限制,IPT系统的输出功率较低。为实现IPT系统大功率输出,构建了基于阶梯波移相合成方法的级联型多电平逆变器的IPT系统,并详细分析其工作原理和功率自平衡特性。在此基础上,建立谐波消除方程,得到移相角与脉宽的显式解,从而避免求解高次超越方程。在消除3次谐波的基础上,通过改变移相角与脉宽,不需增加DC-DC环节便能实现IPT系统输出功率的连续调节。仿真和实验验证了IPT系统的级联型逆变器输出功率为1.6 kW时,每个全桥单元的输出功率约为800 W,且级联逆变器的输出电压的3次谐波被完全消除,同时能连续调节IPT系统的功率。这种基于阶梯波移相合成方法的级联型多电平逆变器可望在大功率IPT系统中得到应用。The power capacity of the single-phase H-bridge inverter used in the traditional IPT （Inductive Power Transfer） systems is limited by the constraint of the power electronic devices. A novel staircase waveform method employed in the cascaded multilevel inverter was proposed in this paper to enhance the system＇s power capacity. By analyzing its working principle in detail, the power auto balance characteristic can be achieved. The explicit solutions of phase-shift angle and pulse width are given by solving harmonic elimination equation to avoid solving high transcendental equations. This approach not only can eliminate the 3rd harmonic, but also can continuously regulate the output voltage in order to control the output power of IPT systems by altering the phase-shift angle and pulse width without DC-DC devices. The performance of the proposed method was evaluated by the simulation and experimentation with 1.6kW maximum output power, e.g. 800W per bridge. The output power of cascaded inverters could be regulated continually without the 3rd harmonic. This staircase waveform method based cascaded inverters is suitable for the high power IPT application.

关 键 词：感应电能传输 级联型多电平逆变器 谐波消除 功率调节 

分 类 号：TM46[电气工程—电器]