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Cascade 3-Phase IHCML Inverter using Maximal Distension Vector Control

최근접 벡터 제어기법을 이용한 cascade 3상 IHCML 인버터

  • Published : 2009.05.31

Abstract

In this paper, a new method, cascade 3 phase IHCML(Isolated H-bridge Cascade Multi-Level) inverter and a control method is proposed by using two 3-phase transformers that have respectively different transformation rates. Vector control technique in which the highest proximity vector has been used is also put into use. With this process, the switching frequency is almost identical with the output fundamental frequency, which makes less switching loss, and the switching frequency of the small volume of the H-bridge that is in charge of small power is highly controlled, which improves the quality of the output voltage.

본 논문에서는 변압비가 다른 2개의 삼상 변압기를 이용한 새로운 방식의 cascade 3상 IHCML(Isolated H-bridge Cascade Multi-Level) 인버터 및 제어 방식을 제안한다. 또한 cascade 3상 IHCML 인버터를 제어하기 위해 최근접 벡터를 이용한 벡터제어 기법을 사용하였다. 이로 인해 많은 전력을 담당하는 대용량 H-bridge의 스위칭 주파수는 출력 기본주파수와 거의 동일하여 제어 스위치 손실이 작으며, 작은 전력을 담당하는 저용량 H-bridge의 스위칭 주파수는 높게 제어 하므로 출력전압의 품질이 향상되었다.

Keywords

References

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