Three-phase soft-switching inverter for induction motor drives

Author

Chao, K.H. ; Liaw, C.M.

Author_Institution

Dept. of Electr. Eng., Nat. Tsing Hua Univ., Hsinchu, Taiwan

Volume

148

Issue

1

fYear

2001

fDate

1/1/2001 12:00:00 AM

Firstpage

8

Lastpage

20

Abstract

A zero-voltage transition (ZVT) soft-switching inverter for an induction motor drive is developed. The proposed soft-switching inverter is formed from the traditional pulse-width modulated (PWM) inverter by simply augmenting with auxiliary resonant circuits, and the soft switching is achieved through applying PWM switching control signals with suitable delays for the main and auxiliary switches. No additional voltage and current sensors are required in the implementation. The operations and governing equations in various modes of the proposed soft-switching inverter are first analysed, then, accordingly, a quantitative design procedure is given to find the values of the auxiliary resonant circuit components and the delay times of the switches for achieving ZVT control. Finally, the designed soft-switching inverter is used for powering an indirect field-oriented (IFO) induction motor drive to test its effectiveness. The simulation and measured results show that a smaller switching loss and higher conversion efficiency are obtained by the proposed soft-switching inverter

Keywords

DC-AC power convertors; PWM invertors; induction motor drives; machine vector control; resonant power convertors; switching circuits; PWM inverter; PWM switching control signals; ZVS; auxiliary resonant circuits; conversion efficiency; governing equations; indirect field-oriented control; induction motor drives; measurement; quantitative design procedure; simulation; switch delay times; switching loss; three-phase soft-switching inverter;

fLanguage

English

Journal_Title

Electric Power Applications, IEE Proceedings -

Publisher

iet

ISSN

1350-2352

Type

jour

DOI

10.1049/ip-epa:20010123

Filename

902335