Power supply circuit for suppressing starting surge current

The utility model discloses a power supply circuit for suppressing starting surge current. The power supply circuit comprises an AC input port, a power resistor, an AC-DC power supply chip, a relay and a DC output port. The zero line of the AC input port is connected with one voltage input pin of th...

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Bibliographische Detailangaben
Hauptverfasser:	YAN CHENGBIN, WANG CHENGUANG
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC,OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWERSUPPLY SYSTEMS CONTROL OR REGULATION THEREOF CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER CONVERSION OR DISTRIBUTION OF ELECTRIC POWER ELECTRICITY EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS GENERATION
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Beschreibung
Zusammenfassung:	The utility model discloses a power supply circuit for suppressing starting surge current. The power supply circuit comprises an AC input port, a power resistor, an AC-DC power supply chip, a relay and a DC output port. The zero line of the AC input port is connected with one voltage input pin of the AC-DC power supply chip, the live line of the AC input port is connected with one voltage input pin of the AC-DC power supply chip through the power resistor, and the output pin of the AC-DC power supply chip is connected with the DC output port; the switch end of the relay is connected in parallel with the two ends of the power resistor; the resistance value of the power resistor is larger than or equal to 100 ohms. According to the utility model, the large-resistance power resistor is connected in series with the live wire to absorb the surge current generated by capacitor charging, and the charging time of the capacitor is prolonged by dozens of times, so that the surge peak current is reduced by dozens of tim