JPS5928238U - Overvoltage protection circuit - Google Patents

Overvoltage protection circuit

Info

Publication number
JPS5928238U
JPS5928238U JP12355982U JP12355982U JPS5928238U JP S5928238 U JPS5928238 U JP S5928238U JP 12355982 U JP12355982 U JP 12355982U JP 12355982 U JP12355982 U JP 12355982U JP S5928238 U JPS5928238 U JP S5928238U
Authority
JP
Japan
Prior art keywords
thyristor
capacitor
overvoltage protection
circuit
protection circuit
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP12355982U
Other languages
Japanese (ja)
Inventor
小林　忠夫
前川　英洋
Original Assignee
株式会社明電舎
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 株式会社明電舎 filed Critical 株式会社明電舎
Priority to JP12355982U priority Critical patent/JPS5928238U/en
Publication of JPS5928238U publication Critical patent/JPS5928238U/en
Pending legal-status Critical Current

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  • Emergency Protection Circuit Devices (AREA)
  • Protection Of Static Devices (AREA)

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図は従来の過電圧保護回路図、第２図は本考案の一
実施例を示す回路図、第３図は第２図に　　　　゛おけ
るサーミスタフの特性図である。 ２・・・電力変換装置、３・・・整流回路、４・・・コ
ンデンサ、６・・・サイリスタ、７・・・正特性サーミ
スタ、８・・・定電圧ダイオード。FIG. 1 is a conventional overvoltage protection circuit diagram, FIG. 2 is a circuit diagram showing an embodiment of the present invention, and FIG. 3 is a characteristic diagram of the thermistor shown in FIG. 2. 2... Power converter, 3... Rectifier circuit, 4... Capacitor, 6... Thyristor, 7... Positive characteristic thermistor, 8... Constant voltage diode.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 半導体素子を主回路に持つ電力変換装置の交流側に交流
入力側を接続した整流回路と、この整流回路の直流出力
側に接続したコンデンサと、このコンデンサと並列に接
続したサイリスタと正特性サーミスタの直列接続回路と
、上記サイリスクのアノード・カソード間に接続して上
記コンデンサが過電圧充電されたときに該サイリスタを
オンさせるゲート電流を供給する定電圧ダイオードとを
備えたことを特徴とする過電圧保護回路。A rectifier circuit whose AC input side is connected to the AC side of a power conversion device having a semiconductor element as its main circuit, a capacitor connected to the DC output side of this rectifier circuit, and a thyristor and a positive temperature coefficient thermistor connected in parallel with this capacitor. An overvoltage protection circuit comprising a series connection circuit and a constant voltage diode connected between the anode and cathode of the thyristor to supply a gate current that turns on the thyristor when the capacitor is charged with an overvoltage. .
JP12355982U 1982-08-13 1982-08-13 Overvoltage protection circuit Pending JPS5928238U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12355982U JPS5928238U (en) 1982-08-13 1982-08-13 Overvoltage protection circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12355982U JPS5928238U (en) 1982-08-13 1982-08-13 Overvoltage protection circuit

Publications (1)

Publication Number Publication Date
JPS5928238U true JPS5928238U (en) 1984-02-22

Family

ID=30282003

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12355982U Pending JPS5928238U (en) 1982-08-13 1982-08-13 Overvoltage protection circuit

Country Status (1)

Country Link
JP (1) JPS5928238U (en)

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