Topology and Capacitor Voltage Balancing Control of a Symmetrical Hybrid Nine-Level Inverter for High-Speed Motor Drives
Topology and Capacitor Voltage Balancing Control of a Symmetrical Hybrid Nine-Level Inverter for High-Speed Motor Drives
复制标题
用于高速电机驱动的对称混合九电平逆变器的拓扑和电容器电压平衡控制
DOI：
10.1109/tia.2017.2726503
复制
发表时间：
2017-11-01
影响因子：
4.4
通讯作者：
Li, Yongdong
中科院分区：
文献类型：
--
作者：
Wang, Kui;Zheng, Zedong;Li, Yongdong
为了提高输出电压电平，减少隔离直流电源，本文提出了一种对称混合九电平逆变器的高速电机驱动应用。该逆变器的每一相由一个五电平DC/DC变换器单元和一个H桥单元组成。DC/DC转换器在低电压器件的情况下在高频下操作，并且H桥在高电压器件的情况下在基频下操作。三相连接到一个公共直流链路，每个相驱动一个开路绕组电机的隔离绕组。介绍了其工作原理和调制方法。详细分析了飞跨电容和直流母线中性点的平均电流，提出了一种基于移相脉宽调制的电容电压平衡方法。仿真和实验结果证明了这种拓扑结构和控制方法的可行性。
In order to increase the output voltage levels and reduce the isolated dc sources, a symmetrical hybrid nine-level inverter for high-speed motor drive applications is presented in this paper. Each phase of this inverter is composed of a five-level dc/dc converter cell and an H-bridge cell. The dc/dc converter is operated at high frequency with low-voltage devices and the H-bridge is operated at fundamental frequency with high-voltage devices. The three phases are connected to a common dc-link and each drives an isolated winding of an open-winding motor. The operating principles and modulation method are introduced. A detailed analysis of the average currents through the flying capacitor and neutral point of the dc-link is presented and a capacitor voltage balancing method based on phase-shifted pulse-width modulation is proposed. Simulation and experimental results are presented to demonstrate the feasibility of this topology and control method.