JPS6031188U

JPS6031188U - Current source inverter control circuit

Info

Publication number: JPS6031188U
Application number: JP12391583U
Authority: JP
Inventors: 柳沢　啓司
Original assignee: 富士電機株式会社
Priority date: 1983-08-10
Filing date: 1983-08-10
Publication date: 1985-03-02

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図は電流形インバータの回路図であり、第２図は電
流形インバータのサイリスタ点弧パルス指令信号のタイ
ムチャートである。第３図は本考案の実施例を示す論理
回路図であり、第４図は第３図に示す論理回路のタイム
チャートである。２・・・３相交流電源、４・・・整流器、６・・・直流
リアクトル、８・・・負荷、１１，１２，１３．１４・
・・主サイリスタ、２１，２２，２３，２４・・・補助
サイリスタ、３１，３３・・・転流コンデンサ、３２．
３４・・・転流リアクトル、４０．４２・・・ＯＲ素子
、４４．５６・・・ＮＡＮＤＡＮＤ素子、　５４．５８
・・・タイマ素子、４８・・・反転素子、５０．５２・
・・ＡＮＤ素子、Ａ・・・主サイリスタ１１，１４の点
弧パルス指令信号、Ｂ・・・主サイリスタ１２，１３の
点弧パルス指令信号、Ｃ・・・補助サイリスタ２１，２
４の点弧パルス指令信号、Ｄ・・・補助サイリスタ２２
゜２３の点弧パルス指令信号、Ｅ・・・インバータ異常
信号、Ｆ・・・反転素子４８出力信号、Ｊ・・・補助サ
イリスタ２１．２４点弧パルス出力信号、Ｋ・・・補助
サイリスタ２２．２３点弧パル伐出力信号、Ｍ・・・整
流器４パルスシフト指令信号、Ｎ・・・整流器４パルス
オフ指令信号、Ｔ・・・停止指令信号。Ａ」土−一− ８−一」下− Ｃ−−−−−−−−FIG. 1 is a circuit diagram of a current source inverter, and FIG. 2 is a time chart of a thyristor firing pulse command signal of the current source inverter. FIG. 3 is a logic circuit diagram showing an embodiment of the present invention, and FIG. 4 is a time chart of the logic circuit shown in FIG. 2... Three-phase AC power supply, 4... Rectifier, 6... DC reactor, 8... Load, 11, 12, 13. 14.
... Main thyristor, 21, 22, 23, 24... Auxiliary thyristor, 31, 33... Commutation capacitor, 32.
34... Commutation reactor, 40.42... OR element, 44.56... NAND AND element, 54.58
...Timer element, 48...Inversion element, 50.52.
...AND element, A... firing pulse command signal for main thyristors 11, 14, B... firing pulse command signal for main thyristors 12, 13, C... auxiliary thyristors 21, 2
ignition pulse command signal of No. 4, D... auxiliary thyristor 22
23 firing pulse command signal, E: inverter abnormality signal, F: inverting element 48 output signal, J: auxiliary thyristor 21.24 firing pulse output signal, K: auxiliary thyristor 22. 23 firing pulse cutting output signal, M... Rectifier 4-pulse shift command signal, N... Rectifier 4-pulse off command signal, T... Stop command signal. A" Sat-1- 8-1" Bottom- C----------------------

Claims

[Scope of utility model registration request]

A commutating circuit formed by connecting a commutating capacitor and a commutating reactor in series is commonly connected to two sets of main thyristors connected in series, and the main thyristor is connected in common to two sets of main thyristors connected in series, and the commutating current from the commutating circuit is caused to flow through the main thyristors. In a current source inverter in which the required number of inverter phases forming one set are connected in parallel to a DC power source via a DC reactor with auxiliary thyristors connected in parallel to each of the auxiliary thyristors, the current source inverter is commanded to stop. means for determining whether or not the auxiliary thyristor firing pulse command signal is output when the signal is issued, and if the auxiliary thyristor firing pulse command signal is not output when the stop command signal is issued, from that point on; If the auxiliary thyristor firing pulse command signal is being output, means for not outputting the auxiliary thyristor firing pulse signal for a predetermined period of time after waiting for the termination of the firing pulse command signal; 1. A control circuit for a current source inverter, comprising means for cutting off DC output from a DC power source after a sufficient time for ignition has elapsed and within the predetermined time.