JPS60190139U - Capacitor initial charging 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) [Summary] 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図は本考案の充電回路の実施例を示す回路図、第２
図は同上交流入力の場合の応用例を示す′回路図、第３
図はＰＴＣサーミスタの素子抵抗特性を示すグラフ、第
４図はＰＴＣサーミスタが臨界温度に達するまでにこの
サーミスタに注入されるエネルギーの関係を示すグラフ
、第５図は従来の充電回路を示す回路図、第６図はこの
第５図回路の動作波形図である。 １・・・直流電源、２・・・スイッチ、３・・・充電抵
抗、４・・・充電抵抗短絡用スイッチ、５・・・コンデ
ンサ、６・・・負荷、７・・・ＰＴＣサーミスタ、８・
・・抵抗、９　　　゛・・・交流電源、１０・・・整流
器。 第５図 第６図Figure 1 is a circuit diagram showing an embodiment of the charging circuit of the present invention;
The figure is a circuit diagram showing an example of application in the case of AC input as above.
The figure is a graph showing the element resistance characteristics of a PTC thermistor, Figure 4 is a graph showing the relationship between the energy injected into the PTC thermistor until it reaches its critical temperature, and Figure 5 is a circuit diagram showing a conventional charging circuit. , FIG. 6 is an operational waveform diagram of the circuit of FIG. 5. 1... DC power supply, 2... Switch, 3... Charging resistor, 4... Charging resistor short circuit switch, 5... Capacitor, 6... Load, 7... PTC thermistor, 8・
...Resistance, 9゛...AC power supply, 10...Rectifier. Figure 5 Figure 6

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 電解コンデンサ等の大容量コンデンサを初期充電する回
路において、充電抵抗として臨界温度で急激に抵抗が増
大する特性を有する正特性サーミスタを用いたことを特
徴とするコンデンサの初期充電回路。1. An initial charging circuit for a capacitor, the circuit initially charging a large capacity capacitor such as an electrolytic capacitor, characterized in that a positive temperature coefficient thermistor having a characteristic of rapidly increasing resistance at a critical temperature is used as a charging resistor.