PWM thyristor inverter with one bypass GTO utilizing line and device commutations

Author

Matsui, Mikihiko ; Segami, Masahiro ; Seong, Sejin ; Fukao, Tadashi

Author_Institution

Dept. of Electr. & Electron. Eng., Tokyo Inst. of Technol., Japan

fYear

1988

fDate

11-14 April 1988

Firstpage

469

Abstract

The waveforms and power factor of an ordinary line-commutated thyristor inverter can be improved by adding one bypass GTO (gate-turn-off) thyristor and a small AC filter unit. Possible transitions between the switching states of the inverter are investigated on the basis of instantaneous voltage and current vectors. The extended freedom from adding the GTO is clearly shown. Restrictions for the pulse width-modulation (PWM) pattern are also shown, and an example pattern is deduced. A criterion for the design of the AC filter parameters is given. The validity of the method is confirmed by simulation and experimental results.<>

Keywords

commutation; filters; invertors; power factor correction; pulse width modulation; thyristor applications; AC filter; GTO; PWM thyristor inverter; current vectors; design; line-commutated thyristor inverter; power factor; simulation; switching states; voltage vectors; Bridge circuits; Choppers; Filters; Inductance; Power semiconductor switches; Pulse width modulation; Pulse width modulation inverters; Switching converters; Thyristors; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Power Electronics Specialists Conference, 1988. PESC '88 Record., 19th Annual IEEE

Conference_Location

Kyoto, Japan

Type

conf

DOI

10.1109/PESC.1988.18169

Filename

18169