JPS6096992U

JPS6096992U - Inverter overcurrent limiter

Info

Publication number: JPS6096992U
Application number: JP18777583U
Authority: JP
Inventors: 丹羽　亨; 正徳藤原; 市岡　忠士
Original assignee: 株式会社明電舎
Priority date: 1983-12-05
Filing date: 1983-12-05
Publication date: 1985-07-02

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 drawings]

第１図は本考案の実施例に係るインバータの過電流制限
装置の電気回路図、第２図は第１図の装置の要部を示す
電気結線図である。１・・・交流電源、２・・・コンバータ、５・・・イン
バータ、６・・・パワートランジスタ、８・・・負荷で
ある誘導電動機、９・・・電流検出器、１０・・・電流
設定器、１１・・・逆変換制御部、１２・・・突合せ回
路、１３・・・・−論理信号発生回路、１４・・・演算
処理回路、１５・・・ナントゲート、１６ａ〜１６ｃ・
・・アンドゲート、１７・・・点弧信号発生回路。FIG. 1 is an electrical circuit diagram of an overcurrent limiting device for an inverter according to an embodiment of the present invention, and FIG. 2 is an electrical wiring diagram showing essential parts of the device shown in FIG. DESCRIPTION OF SYMBOLS 1... AC power supply, 2... Converter, 5... Inverter, 6... Power transistor, 8... Induction motor as load, 9... Current detector, 10... Current setting 11... Inverse conversion control unit, 12... Matching circuit, 13... - logic signal generation circuit, 14... Arithmetic processing circuit, 15... Nants gate, 16a to 16c.
...And gate, 17...Ignition signal generation circuit.

Claims

[Scope of utility model registration request]

A converter that converts AC power into DC power, an inverter that converts the DC power from the converter into AC power and supplies it to a load, and a current detector that detects the input DC current of the inverter to detect an overload of the inverter. A device for limiting current, comprising: a matching circuit that compares a detection signal from the current detector with a setting signal to obtain a deviation signal; a logic signal generating circuit that converts the deviation signal from the matching circuit into a logic signal; an arithmetic processing circuit that arithmetic processes the output signal of the signal generation circuit, a signal corresponding to the operating state of the inverter, and a control signal for controlling switching elements of the inverter; and an arithmetic processing circuit that operates the inverter according to the output of the arithmetic processing circuit. An overcurrent limiting device for an inverter, comprising: an ignition signal generating circuit for controlling an ignition signal.