Passive snubber energy recovery for a GTO thyristor inverter bridge leg

Author

Williams, Barry W. ; Finney, Stephen J.

Author_Institution

Dept. of Comput. & Electr. Eng., Heriot-Watt Univ., Edinburgh, UK

Volume

47

Issue

1

fYear

2000

fDate

2/1/2000 12:00:00 AM

Firstpage

2

Lastpage

8

Abstract

This paper presents a turn-on and turn-off passive energy recovery snubber circuit suitable for high-voltage high-power gate-turn-off thyristor inverter bridge configurations. The circuit recovers not only inductive turn-on and capacitive turn-off snubber energies, but also energies associated with freewheel diode reverse recovery. Energy is transferred back to the DC supply via a high-frequency transformer, that is fully reset. A method for reducing the transformer secondary diode voltage stress is presented. The performance of the circuit is supported by PSpice simulation, mathematical analysis, and practical results

Keywords

bridge circuits; high-frequency transformers; invertors; snubbers; thyristor convertors; DC supply; GTO thyristor inverter bridge leg; PSpice simulation; capacitive turn-off snubber energy recovery; energy transfer; freewheel diode reverse recovery; gate-turn-off thyristor inverter bridge; high-frequency transformer; high-power; high-voltage; inductive turn-on snubber energy recovery; mathematical analysis; passive snubber energy recovery; transformer secondary diode voltage stress reduction; turn-off passive energy recovery snubber; turn-on passive energy recovery snubber; Bridge circuits; Capacitors; Diodes; Inductors; Inverters; Leg; Power transformer insulation; Snubbers; Switches; Thyristors;

fLanguage

English

Journal_Title

Industrial Electronics, IEEE Transactions on

Publisher

ieee

ISSN

0278-0046

Type

jour

DOI

10.1109/41.824016

Filename

824016