Last electric soft charging circuit of electrolytic capacitor

The utility model provides a last electric soft charging circuit of electrolytic capacitor, includes a relay, a thermistor and the time -delay control circuit that charges, the relay includes switch and coil, electrolytic capacitor's positive pole connects DC power supply's positive pole, electrolytic capacitor's negative pole passes through thermistor connects DC power supply's negative pole, the switch of relay with thermistor is parallelly connected, the coil of relay with the time -delay control circuit that charges connects. The relay is because only participate in electrolytic capacitor charge -discharge return circuit, the choice of motor rating of relay satisfy charge and discharge of capacitor ripple current can, adopt the parallelly connected thermistor of big power relay to concatenate the mode on load power supply major loop than ordinary soft start circuit, can greatly reduced relay current capacity, reduction power supply relay cost. 种电解电容上电软充电电路，包括继电器、热敏电阻和充电延时控制电路，所述继电器包括开关和线圈，所述电解电容的正极接直流电源的正