A large capacity GTO inverter with low-loss snubber circuits

Author

Kawakami, N. ; Jifuku, Y. ; Ueda, S. ; Hombu, M. ; Ueda, A.

Author_Institution

Hitachi Ltd., Ibaraki-ken, Japan

fYear

1991

fDate

Sept. 28 1991-Oct. 4 1991

Firstpage

892

Abstract

A large capacity inverter using high power gate turn-off (GTO) thyristors which can be used instead of a cycloconverter in AC drives is presented. With the techniques of multiple configuration and GTO series connection, the inverter capacity is increased effectively. High conversion efficiency is obtained by using low-loss snubber circuits using energy recovery units (ERUs) have good performance in PWM operation. High energy recovery efficiency is obtained, especially in leading operation (turn-on operation when free-wheeling diode conducts). These snubber circuits have the superior ability for clamping overvoltage at GTO turn-off.<>

Keywords

invertors; overvoltage protection; thyristor applications; GTO inverter; GTO turn-off; energy recovery units; free-wheeling diode; gate turn-off; low-loss snubber circuits; overvoltage clamping; turn-on operation; Circuits; Induction motors; Power supplies; Power system harmonics; Pulse width modulation inverters; Rectifiers; Snubbers; Switching frequency; Thyristors; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Industry Applications Society Annual Meeting, 1991., Conference Record of the 1991 IEEE

Conference_Location

Dearborn, MI, USA

Print_ISBN

0-7803-0453-5

Type

conf

DOI

10.1109/IAS.1991.178343

Filename

178343