A DC-link Capacitor Voltage Balancing with CMV Elimination using only the Switching State Redundancies for a Reduced Switch Count Multi-Level Inverter fed IM Drive

被引:4
|
作者
Mondal, Gopal [1 ]
Sheron, F. [1 ]
Das, Anandarup [1 ]
Sivakumar, K. [1 ]
Gopakumar, K. [1 ]
机构
[1] Indian Inst Sci, CEDT, Bangalore 560012, Karnataka, India
关键词
D O I
10.1080/09398368.2009.11463701
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
Common mode voltage (CMV) variations in PWM inverter-fed drives generate unwanted shaft and bearing current resulting in early motor failure. Multilevel inverters reduce this problem to some extent, with higher number of levels. But the complexity of the power circuit increases with an increase in the number of inverter voltage levels. In this paper a five-level inverter structure is proposed for open-end winding induction motor (IM) drives, by cascading only two conventional two-level and three-level inverters, with the elimination of the common mode voltage over the entire modulation range. The DC link power supply requirement is also optimized by means of DC link capacitor voltage balancing, with PWM control., using only inverter switching state redundancies. The proposed power circuit gives a simple power bits structure.
引用
收藏
页码:5 / 15
页数:11
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