JPS58193894U

JPS58193894U - Protection circuit for inverter equipment

Info

Publication number: JPS58193894U
Application number: JP9025582U
Authority: JP
Inventors: 光博芝田
Original assignee: 株式会社東芝
Priority date: 1982-06-18
Filing date: 1982-06-18
Publication date: 1983-12-23

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図は電圧源形インバータをサイリスク定電圧直流電
源で付勢するインバータ装置の一般的構成を示す系統図
、第２図は本考案によるインバータ装置の保護回路の一
実施例を示すブロック図、第３図は第１図の短絡事故時
の状態を示す等価回路図、第４図は従来の保護回路によ
る保護動作を説明するための事故電流波形図、第５図は
本考案による保護動作を説明するための事故電流波形図
である。１・・・サイリスク定電圧直流電源、２・・・電圧源形
インバータ、３・・・サイリスタ順逆変換器、４・・・
直流しゃ断器、５・・・直流リア・クトル、６．７・・
・コンデンサ、８・・・トランジスタインバータ、９・
・・交流電動機、１０・・・直流短絡検出回路、１１・
・・直流しゃ断器用外し指令回路、１２・・・ベースカ
ットオフ回路。第２図Fig. 1 is a system diagram showing the general configuration of an inverter device that energizes a voltage source type inverter with a SIRIS constant voltage DC power supply, and Fig. 2 is a block diagram showing an embodiment of the protection circuit of the inverter device according to the present invention. Fig. 3 is an equivalent circuit diagram showing the state at the time of the short circuit accident in Fig. 1, Fig. 4 is an accident current waveform diagram to explain the protection operation by the conventional protection circuit, and Fig. 5 is the protection operation according to the present invention. It is a fault current waveform diagram for explanation. 1... Thyrisk constant voltage DC power supply, 2... Voltage source type inverter, 3... Thyristor forward/reverse converter, 4...
DC breaker, 5...DC breaker, 6.7...
・Capacitor, 8...Transistor inverter, 9・
...AC motor, 10...DC short circuit detection circuit, 11.
...Removal command circuit for DC breaker, 12...Base cutoff circuit. Figure 2

Claims

[Scope of utility model registration request]

A DC short circuit detection circuit for detecting a DC short circuit accident in the thyristor constant voltage DC power supply of an inverter device that energizes one or more voltage source type inverters with a forward/reverse conversion type thyristor constant voltage DC power supply via a DC breaker. and a trip command circuit that issues a trip command to the DC breaker in response to the DC short circuit detection signal, and an inverter cutoff circuit that issues an operation stop command to the voltage source type inverter simultaneously with the trip command. A protection circuit for an inverter device, characterized in that: