JPS61134637U

JPS61134637U -

Info

Publication number: JPS61134637U
Application number: JP1642885U
Authority: JP
Priority date: 1985-02-07
Filing date: 1985-02-07
Publication date: 1986-08-22

Description

[Brief explanation of the drawing]

第１図および第２図は本考案の一実施例の要部
構成を示す系統図および部分詳細図、第３図は第
１図および第２図の説明のため示した特性図、第
４図は従来例のトランジスタインバータ保護回路
の要部構成を示す系統図、第５図はトランジスタ
インバータの保護作用の説明のため示した特性図
である。４……インバータ回路、６……制御回路、７…
…直流電圧検出器、９……出力電流検出器、１２
……動作特性信号発生回路、ＳＶ……電圧検出信
号、ＳＩ……電流検出信号、ＳＯ……保護指令信
号、Ｗ_１，Ｗ_２，ＷＶ，ＷＩ，Ｃ，Ｃ′……動作
特性線。 1 and 2 are a system diagram and a partial detailed diagram showing the main part configuration of an embodiment of the present invention, FIG. 3 is a characteristic diagram shown for explaining FIGS. 1 and 2, and FIG. 4 5 is a system diagram showing the main part configuration of a conventional transistor inverter protection circuit, and FIG. 5 is a characteristic diagram shown for explaining the protection action of the transistor inverter. 4...Inverter circuit, 6...Control circuit, 7...
...DC voltage detector, 9...Output current detector, 12
...Operating characteristic signal generation circuit, SV... Voltage detection signal, SI... Current detection signal, SO... Protection command signal, W ₁ , W ₂ , WV, WI, C, C'... Operating characteristic line.

補正昭６０．３．６実用新案登録請求の範囲を次のように補正する
。Amendment March 6, 1980 The scope of claims for utility model registration is amended as follows.

【実用新案登録請求の範囲】インバータ回路の直流電圧および出力電流を検
出して過電圧・過電流保護を行うトランジスタイ
ンバータ保護回路において、電圧検出信号の高い
領域で電圧量に反比例して過電流動作点を低減さ
せ、かつ電流検出信号の高い領域で電流量に反比
例して過電圧動作点を低減させる信号補正回路を
具備し、該信号補正回路出力により近似した逆バ
イアス安全動作領域曲線を得る保護信号発生手段
を設けて成ることを特徴とするトランジスタイン
バータ保護回路。[Claim for Utility Model Registration] In a transistor inverter protection circuit that detects the DC voltage and output current of an inverter circuit to provide overvoltage and overcurrent protection, the overcurrent operating point is inversely proportional to the voltage amount in the high voltage detection signal region. and a signal correction circuit that reduces the overvoltage operating point in inverse proportion to the amount of current in a high region of the current detection signal, and obtains a reverse bias safe operating area curve approximated by the output of the signal correction circuit. A transistor inverter protection circuit comprising: means.

Claims

[Scope of utility model registration request]

In a transistor inverter protection circuit that detects the input voltage and output current of an inverter circuit to provide overvoltage/overcurrent protection, the overcurrent operating point is reduced in inverse proportion to the voltage amount in the high voltage detection signal region, and the current detection signal The present invention is characterized by comprising a signal correction circuit that reduces the overvoltage operating point in inverse proportion to the amount of current in a high current region, and a protection signal generating means for obtaining a reverse bias safe operating area curve approximated by the output of the signal correction circuit. Transistor inverter protection circuit.