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The Carrier-based PWM Method for Voltage Balance of Flying Capacitor Multi-bevel Inverter  

이상길 (한양대학교 전기공학과)
강대욱 (한양대 대학원 전기공학과)
이요한 (LG전자 디지털 어플라이언스 연구소)
현동석 (한양대 전자전기공학과)
Publication Information
The Transactions of the Korean Institute of Power Electronics / v.7, no.1, 2002 , pp. 65-73 More about this Journal
Abstract
This paper proposes a new carrier-based PWM method to solve the most serious problem of flying capacitor multi-level inverter that is the unbalance of capacitor voltages. The voltage unbalance occurs due to the difference of each capacitor's charging and discharging time applied to Flying Capacitor Inverter. New solution controls the variation of capacitor voltages into the mean '0'during some period by means of new carriers using the leg voltage redundancy in the flying capacitor inverter. The solution can be easily expanded to the multi-level inverter. The leg voltage redundancy in the new method makes the switching loss of device equals to the conduction loss of device. This paper will examine the unbalance of capacitor voltage and the conventional theory of self-balance using Phase-shifted carrier. And then the new method that is suitable to the flying capacitor inverter will be explained.
Keywords
carrier-based PWM; flying capacitor inverter; voltage redundancy; balance of capacitor voltages;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
연도 인용수 순위
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[ Y.H.Lee;R.Y.Kim;D.S.Hyun ] / IEEE-APEC Conf.Rec.
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6 플라잉 커패시터 멀티레벨 인버터 및 컨버터를 위한 스너버 회로 /
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7 An Improved Carrier-based SVPWM Method by the Redistribution of Carrier-wave Using Leg Voltage Redundancies in Generalized Cascaded Multilevel Inverter /
[ D.W.Kang;Y.H.Lee;B.S.Suh;C.H.Choi;D.S.Hyun ] / Journal of Power Electronics   과학기술학회마을