| 摘要 |
PROBLEM TO BE SOLVED: To protect a resistor from overheat and ensure a system activated state in a device in which the resistor is shared between two precharge circuits respectively charging two smoothing capacitors.SOLUTION: When a system activation is performed by connecting a battery 22 and a driving device 12, a power supply device performs an SMR holding control to hold a state that a positive electrode side relay for driving SMRB and a negative electrode side relay for driving SMRG are turned on when a counter CT reflecting a temperature of a resistor R reaches a predetermined value Cset or more by precharge of a smoothing capacitor for driving C1. When connecting the battery 22 and a charger 14, the power supply device performs a CHR holding control to hold a state that a positive electrode side relay for charging CHRB and a negative electrode side relay for charging CHRG are turned on when the counter CT reaches a value or more, which is obtained by subtracting a predetermined value α from the predetermined value Cset, by precharge of a smoothing capacitor for charging C2. This ensures a system activated state even when the CHR holding control is being performed. |
