| 摘要 |
PROBLEM TO BE SOLVED: To provide a low-cost power supply of a simple structure for a vehicle. SOLUTION: This power supply is provided with a main battery 10, an auxiliary battery 60 that is charged and discharged at a low voltage than that of the main battery, an inverter circuit 30a into which the voltage from the main battery is inputted via a main contactor 24a, a smoothing capacitor 31 provided parallel between the main battery and the inverter circuit; a DC-DC converter 50 that, provided between the main battery and the auxiliary one, supplies electric energy stored in the main battery or smoothing capacitor to the auxiliary battery after voltage change, and supplies electric energy stored in the auxiliary battery to the smoothing capacitor after the voltage change; and an electronic controlling device 80 that controls the DC-DC converter before starting the conduction to the inverter circuit, and that closes a switch after charging the smoothing capacitor until the voltage of the stored electricity of the main battery 10 becomes a voltage of a specified permissible range. |
