| 摘要 |
PROBLEM TO BE SOLVED: To provide a charger to miniaturize the charger and to reduce the weight thereof while deterioration of the charging efficiency is avoided. SOLUTION: A minus side output terminal of a rectifier 5 is connected to a negative pole of a battery 9, a plus side output terminal of the rectifier 5 is connected to a neutral point of coils 411-413 of a motor 4 of an electric car, the coils 411-413 are connected to each end of the battery 9 through an inverter circuit 25, and thus, the rectified current from the rectifier 5 can charge the battery 9 through the inverter circuit 25 and flywheel diodes 33, 35, 37 (of an upper arm) on the high side of the coils 411-413. The inverter circuit 25 converts the battery voltage to the prescribed AC voltage to drive the motor 40 when the motor 40 is electrically driven. Because the coils 411-413 of the motor 40 perform the reactor function to reduce the ripple component in the rectified output of the rectifier 5 without any change when the battery 9 is charged, the reactor to reduce the ripple component can be dispensed with, and the device is miniaturized, its weight is reduced, and the charging voltage of the battery can be stabilized. |
