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논문 기본 정보

자료유형
학술대회자료
저자정보
Sungmin Kim (서울대학교) Jung-Ik Ha (서울대학교) Seung-Ki Sul (서울대학교)
저널정보
전력전자학회 ICPE(ISPE)논문집 ICPE 2011-ECCE Asia
발행연도
2011.5
수록면
1,445 - 1,451 (7page)

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초록· 키워드

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This paper describes how to reconstruct the three phase current using the only single shunt in a three-level Neutral-Point-Clamped (NPC) PWM inverter. The area where phase currents are measurable is analyzed and the reconstruction method is proposed in three-level PWM inverter. According to the characteristics of the immeasurable areas in voltage plane, the voltage injection method, which relocates the original voltage reference in the immeasurable area to that in a measurable area in the voltage plane, has been devised. For this relocation, the compensating voltage is added and subtracted to the voltage reference in a switching period. And a control algorithm to inject the compensating voltage is also proposed. The proposed reconstruction of the phase currents in the single shunt sensing inverter has been tested by the computer simulation at various reference voltages, being in or passing in the immeasurable area. The results show the satisfactory measurement of the phase currents in overall operating conditions.

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Abstract
Ⅰ. INTRODUCTION
Ⅱ. THREE-LEVEL PWMINVERTER TOPOLOGY AND PWM SEQUENCE
Ⅲ. SINGLE SHUNT SENSING TECHNIQUE IN THREE-LEVEL NPC PWMINVERTER
Ⅳ. MINIMIZED IMMEASURABLE AREA BY VOLTAGE INJECTION
Ⅴ. SIMULATION RESULTS
Ⅵ. CONCLUSION
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