摘要
三相逆变电源一个最重要的性能是维持三相电压的对称输出。本文提出了一种新的针对不平衡负载三相逆变电源控制方法,其通过对逆变电源交流中性点的控制,使得主电路中三相电压可以独立控制。所提出的方案在1KW,400Hz的三相逆变电源实现,在不平衡负载下,逆变电源能够维持很好的对称输出电压。
One of the important performance issues for threephase inverter power supply is to maintain symmetrical output voltages. This paper proposes a new control strategy of a threephase inverter power supply with the threephase unbalanced load applied. In this paper, an accessible AC neutral point is established. When the AC neutral point is controlled to half of the DClink voltage, the potential of AC neutral point N is equal to that of DClink midpoint O, thus each phase voltage can be controlled independently. The proposed control strategy has been implemented on a 400Hz, 1KW threephase inverter power supply, in contrast with the usual control strategy, the inverter can maintain symmetrical output voltages not only at balance load but also at unbalance load.
出处
《电工电能新技术》
CSCD
2003年第1期29-31,60,共4页
Advanced Technology of Electrical Engineering and Energy
