An Improved H8 Topology for Common-Mode Voltage Reduction

被引：29
|
作者：
Xiang, Yangxiao [1 ]
Pei, Xuejun [1 ]
Wang, Meijuan [1 ,2 ]
Shi, Puxin [3 ]
Kang, Yong [1 ]
机构：
[1] Huazhong Univ Sci & Technol, Sch Elect & Elect Engn, Wuhan 430074, Peoples R China
[2] Huazhong Univ Sci & Technol, China EU Inst Clean & Renewable Energy, Wuhan 430073, Peoples R China
[3] State Grid Corp China, Beijing 100031, Peoples R China
来源：
IEEE TRANSACTIONS ON POWER ELECTRONICS | 2019年 / 34卷 / 06期
关键词：
Common-mode voltage (CMV) reduction; electromagnetic interference (EMI) source suppression; H8; topology; LEAKAGE CURRENT ELIMINATION; BEARING CURRENT; INVERTER; EMI;
D O I：
10.1109/TPEL.2018.2870039
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
This paper presents an improved H8 power converter for common-mode voltage (CMV) reduction and electromagnetic interference suppression. The proposed H8 converter can realize zero CMV variation when entering and leaving the zero state, which is mainly achieved by both the improvement of the structure and the control strategy. For the system structure, two switches are added on the dc bus to float the ac part of the three-phase converter in the zero state. Besides, additional capacitors are used to realize controllable CMV. For the control strategy, a simple control strategy is proposed for the H8 converter. It can automatically adapt to the flowing orientation of the load current to realize synchronous switching of the power switches, which effectively eliminates the impact of the dead time. Through analysis, simulations, and experiment, a comparison between the proposed H8 converter and the conventional H6 converter is performed. Results validate the effectiveness of the H8 topology.
引用
收藏
页码：5352 / 5361
页数：10
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