JPS58168892U - DC short circuit detection device for inverse conversion circuit - Google Patents

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) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

【図面の簡単な説明】[Brief explanation of drawings]

第１図は逆変換回路図、第２図は本考案の一実施例を示
す回路図である。 １・・・・・・直流電源、２・・・・・・逆変換部、３
〜６・・・・・・ＧＴｏ、７・・・・・・スナバ−回路
、８・・・・・・帰環ダイオード、１２・・・・・・負
荷、２３〜２６・・・・・・変流器。FIG. 1 is an inverse conversion circuit diagram, and FIG. 2 is a circuit diagram showing an embodiment of the present invention. 1...DC power supply, 2...Inverse conversion section, 3
~6...GTo, 7...Snubber circuit, 8...Return diode, 12...Load, 23-26... Current transformer.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 自己消弧形半導体素子を直列接続して構成したアームを
少くとも２対備え前記自己消弧形半導体素子の各々両端
にスナバ−回路と帰環ダイオードを並列接続し、前記自
己消弧形半導体素子をｆｆ１Ｕ御回路によりオン、オフ
させて負荷に電力を供給するように構成した逆変換回路
において、前記逆変換回路の正常運転時は検出電流が出
力されず、異常事故時にのみ検出電流が出力されるよう
に前記アームと負荷を結ぶ電路およびアームに第１、第
２電流検出器を配設したことを特徴とする逆変換回路の
直流短絡検出装置。At least two pairs of arms are formed by connecting self-arc-extinguishing semiconductor elements in series, and a snubber circuit and a return diode are connected in parallel to both ends of each of the self-arc-extinguishing semiconductor elements, and the self-arc-extinguishing semiconductor element In an inverse conversion circuit configured to supply power to a load by turning on and off the ff1U control circuit, a detection current is not output during normal operation of the inversion circuit, and a detection current is output only in the event of an abnormal accident. 1. A DC short circuit detection device for an inverse conversion circuit, characterized in that first and second current detectors are disposed on the arm and an electric line connecting the arm and the load so that the arm and the load are connected to each other.