Elimination of common-mode voltage in three-phase sinusoidal power converters

被引:237
作者
Julian, AL [1 ]
Oriti, G
Lipo, TA
机构
[1] United Technol Res Ctr, E Hartford, CT 06108 USA
[2] Univ Wisconsin, Madison, WI 53706 USA
关键词
common mode voltage; electromagnetic interference; four-phase inverter; modulation; pulsewidth modulation; resonant dc link;
D O I
10.1109/63.788504
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 active solution to a common-mode voltage created by typical three-phase inverters. It is shown that the addition of a fourth leg to the bridge of a three-phase inverter eliminates the common-mode voltage to ground created by the modulation of the inverter. An appropriate four-phase LC filter is inserted between the inverter and the load in order to create sinusoidal output line-to-line voltage, A simple modification of the modulation strategy is implemented for the four-phase inverter to achieve a three-phase wye-output neutral-to-ground voltage which is equal to zero at all times for an ideal inverter. The modulation strategy thereby completely eliminates the common-made potential produced by traditional modulation techniques with traditional three-phase inverter topologies.
引用
收藏
页码:982 / 989
页数:8
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