| 摘要 |
<P>PROBLEM TO BE SOLVED: To shorten processing time if needed, while efficiently collecting power stored in capacitor to a battery when stopping the vehicle. <P>SOLUTION: A power supply device 100 which is carried in the vehicle 1 equipped with a motor 21 includes: a battery 110 electrically connected to the motor through a boosting circuit 120; a capacitor 130 electrically connected to the motor through a buck-boost circuit 140; and a control means 150 which controls a circuit small in switching loss among a buck-boost circuit and a boosting circuit to carry out step down of a voltage concerning a capacitor when collecting power accumulated in the capacitor into the battery through the buck-boost circuit and the boosting circuit, when an ignition key concerning the vehicle is turned off. <P>COPYRIGHT: (C)2012,JPO&INPIT |
