A switching power supply device includes: a plurality of power supply circuits which include a first power supply circuit and a second power supply circuit and respectively correspond to a plurality of phases of a multiphase AC power supply; a switching circuit; an inrush current prevention (ICP) circuit; and a control circuit. The control circuit causes the switching circuit to switch a phase to be connected to the second power supply circuit to a phase corresponding to the first power supply circuit, and causes the ICP circuit to function so that initial charge of electrolyte capacitors included in the respective power supply circuits is performed. After the initial charge is completed, the control circuit causes the switching circuit to switch the phase to be connected to the second power supply circuit to the phase corresponding to the second power supply circuit, and causes the ICP circuit to turn off.
Switching power supply device including an inrush current prevention circuit
2020-03-10
Patent
Electronic Resource
English
IPC: | H02M APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS , Anlagen zur Umformung von Wechselstrom in Wechselstrom, von Wechselstrom in Gleichstrom oder umgekehrt, oder von Gleichstrom in Gleichstrom und zur Verwendung in Netzen oder ähnlichen Stromversorgungssystemen / B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen |
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