JPS59135090U

JPS59135090U - GTO gate circuit

Info

Publication number: JPS59135090U
Application number: JP2843983U
Authority: JP
Inventors: 亨中村
Original assignee: 株式会社明電舎
Priority date: 1983-02-28
Filing date: 1983-02-28
Publication date: 1984-09-10
Also published as: JPH0424787Y2

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

第１図は従来のゲート回路の一例を示す回路図、第２図
ａは第１図に示されるＧＴＯのアノード電流を示す波形
図、第２図すは第１図に示されるＧＴＯのゲート電流を
示す波形図、第３図は第１図のゲート回路を備えたＧＴ
Ｏを構成した場合の波形図であり、同図ａはアノード・
カソード間電圧を示す波形図、同図すはアノード電流を
示す波形図、同図Ｃはゲートオン電流を示す波形図、同
図ｄは同図Ｃのゲートオン電流を常時供給した場合の波
形図、第４図は本考案に係るＧＴＯのゲート回路の一実
施例を示す回路図、第５図中ａは第４図に示す回路図、
第５図中ａは第４間電圧を示す波形図、第５図中すは第
４図に示されるＧＴＯのアノード電流を示す波形図、第
５図中Ｃは第４図に示されるＧＴＯのゲートオン電流を
示す波形図である。ＧＴＯ・・・ゲート・ターンオフ・サイリスタ、Ｔ、。Ｔ２・・・トランジスタ、■Ｆ・・・電流供給回路、Ｔ
３・・・トランジスタ、Ｅ□、Ｅ２・・・直流電源、Ｃ
・・・コンデンサ、ＳＮ・・・スナバ回路、ＤＳ・・・
ダイオード、Ｃ３・・・ダイオード、ＭＴ・・・監視回
路、ＶＳ・・・電圧検出回路、ＣＭＰ・・・コンパレー
タ。ＲＴｌ −Ｅ１−巳　Ｃ工丁−丁Ｅ２↓二　　　　　　　　　　？２゛第２図に第４図Figure 1 is a circuit diagram showing an example of a conventional gate circuit, Figure 2a is a waveform diagram showing the anode current of the GTO shown in Figure 1, and Figure 2 is the gate current of the GTO shown in Figure 1. Figure 3 is a waveform diagram showing the GT equipped with the gate circuit shown in Figure 1.
This is a waveform diagram when O is configured, and a in the figure is an anode
A waveform diagram showing the cathode voltage, a waveform diagram showing the anode current, a waveform diagram showing the gate-on current, and a waveform diagram showing the gate-on current of C in the diagram. 4 is a circuit diagram showing an embodiment of the gate circuit of the GTO according to the present invention, a in FIG. 5 is a circuit diagram shown in FIG. 4,
In FIG. 5, a is a waveform diagram showing the voltage across the 4th line, A in FIG. 5 is a waveform diagram showing the anode current of the GTO shown in FIG. 4, and C in FIG. FIG. 3 is a waveform diagram showing gate-on current. GTO...Gate turn-off thyristor, T. T2...transistor, ■F...current supply circuit, T
3...Transistor, E□, E2...DC power supply, C
...Capacitor, SN...Snubber circuit, DS...
Diode, C3...Diode, MT...Monitoring circuit, VS...Voltage detection circuit, CMP...Comparator. RTl -E1-Snake C-King-DingE2↓2? 2 ゛Figure 2 and Figure 4

Claims

[Scope of utility model registration request]

(1) In a GTO gate circuit equipped with a snubber circuit, there is a means for monitoring the voltage state between the anode and cathode of the GTO, and a gate-on current is supplied to the gate in a steady state according to the monitoring result by the monitoring means. 1. A gate circuit for a GTO, comprising means for additively supplying a pulsed current.

(2) The monitoring means includes a voltage detection circuit that detects the snubber capacitor voltage of the snubber circuit or the voltage between the anode and cathode of the GTO, and a value corresponding to the voltage detection output of the voltage detection circuit and a value suitable for turning on the GTO. The utility model according to claim 1, further comprising a comparator that compares the voltage level with a predetermined voltage level and issues a command to the current supply means when a value corresponding to the detected output reaches the voltage level. GTO gate circuit.

(3) The current supply means is composed of a transistor that is turned on in response to a command from the comparator, and is turned on to the transistor that supplies a steady gate current to the gate of the GTO.
A gate circuit for a GTO according to claim 2, characterized in that the gate circuit is connected so as to add a required pulsed current in the N state.