JPS58103598U

JPS58103598U - Protection device for power converter equipment

Info

Publication number: JPS58103598U
Application number: JP1981195267U
Authority: JP
Inventors: 正男田中
Original assignee: 富士電機株式会社
Priority date: 1981-12-29
Filing date: 1981-12-29
Publication date: 1983-07-14
Also published as: JPS639279Y2

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薗は本考案による電力変換装置の保護装置を備えた
電力変換装置の主回路と制御電源回路とを示す回路図、
第２図は本考案による電力変換装置の保護装置の一実施
例を示す回路図である。６・・・・・・サイリスクスタック、１１・・・・・・
ダイオードスタック、１２・・・・・・平滑フィルタ、
２４・・・・・・比較器、２５・・・・・・・ダ稗オー
ド、２６．３５・曲・コンデンサ、３１，３６．３８・
・・・・・トランジスタ、３４・・・・・・抵抗。The first section is a circuit diagram showing a main circuit and a control power supply circuit of a power converter equipped with a protection device for a power converter according to the present invention;
FIG. 2 is a circuit diagram showing an embodiment of a protection device for a power conversion device according to the present invention. 6...Sirisk stack, 11...
Diode stack, 12... Smoothing filter,
24...Comparator, 25...Danishode, 26.35・Song・Capacitor, 31,36.38・
...Transistor, 34...Resistor.

Claims

[Scope of utility model registration request]

(1) A thyrisk stack that converts alternating current supplied from an AC power source into direct current, a switch means that controls generation and stop of gate signals given to each thyristor of the thyristor, and a switch means that rectifies and regulates the alternating current voltage. a constant voltage circuit that generates a predetermined first stabilized DC voltage by voltage means;
a rectifier circuit with a small time constant that rectifies the AC voltage to generate a second DC voltage corresponding to the AC voltage; a capacitor connected to the output terminal of the rectifier circuit via a diode; and an output voltage of the rectifier circuit. One input is the third voltage corresponding to the charging voltage of the capacitor, and the fourth voltage corresponding to the charging voltage of the capacitor is
a comparator that takes the voltage of the second input as the other input and uses the charging voltage of the capacitor as the power source to generate an output of a predetermined level when the third voltage becomes lower than the fourth voltage; a non-inch circuit for switching the gate signal switch means to a stopped state; a delay circuit that operates when the output of the comparator is inverted; A protection device for a power conversion device, comprising: a circuit for operating a switch circuit.

(2) Utility Model Registration Scope In the protection device for a power converter according to claim 1, the delay circuit includes a transistor 31 that receives the output of the comparator and a constant voltage circuit that outputs the first DC voltage. A resistor 32 connects the connected capacitor 35, the transistor 3m, and the :17 capacitor 35,
A protection device for a power conversion device including a transistor 36 that opens and closes depending on the potential at a connection point between a resistor 32 and a capacitor 35.