CHARGING DEVICE

A charging device includes: a plurality of legs including respective upper and lower arms having respective switching elements, the upper and lower arms being connected to a battery and a negative pole of a DC charger, respectively; a motor having three phases with a neutral point connected to a positive pole of the DC charger; a driver that drives the switching elements with respective PWM signals; and a controller that monitors a current from the legs to the battery, and instructs the driver to apply duty ratios of the PWM signals so that a fluctuation width of the monitored current is reduced. Further, the controller monitors the measurement result of the sensor at a period other than 1/N of a period of a carrier of the PWM signals, where N is a number of the plurality of legs used for charging the battery.