Inductor commutation soft-switched PWM inverter driven by frequency-modulated PWM signal

Author

Nagao, Michihiko ; Harada, Koosuke

Author_Institution

Energy Electron. Lab., Kumamoto Inst. of Technol., Japan

Volume

13

Issue

1

fYear

1998

fDate

1/1/1998 12:00:00 AM

Firstpage

67

Lastpage

74

Abstract

This paper presents a novel technique using frequency modulation (FM) to improve the efficiency of an inductor commutation soft-switched pulse-width-modulation (PWM) inverter (ICSI). In the ICSI, a circulating current for soft switching always flows through the switches of the inverter, independent of the load and input signal. The circulating current significantly deteriorates the efficiency of ICSI. With the FM technique, the circulating current is effectively suppressed without sensing any current or voltage in the inverter. Efficiencies of ICSI and ICSI with FM (FM ICSI) are analyzed and verified experimentally. As a result, the efficiency of FM ICSI rises about 20%-40% compared with the ICSI

Keywords

DC-AC power convertors; PWM invertors; commutation; frequency modulation; power inductors; switching circuits; ZCS; ZVS; circulating current suppression; frequency-modulated PWM signal; inductor commutation; power conversion efficiency; soft switching; soft-switched PWM inverter; Filters; Frequency modulation; Inductors; Pulse inverters; Pulse width modulation; Pulse width modulation inverters; Switched capacitor circuits; Switches; Zero current switching; Zero voltage switching;

fLanguage

English

Journal_Title

Power Electronics, IEEE Transactions on

Publisher

ieee

ISSN

0885-8993

Type

jour

DOI

10.1109/63.654960

Filename

654960