A motor is to be driven with power supplied from at least one of a first energy storage and a second energy storage. The booster is to boost a first voltage output from the first energy storage such that the first voltage and a second voltage output from the second energy storage satisfy a first condition, a second condition, and a third condition. In the first condition, the second voltage does not exceed a withstand voltage limit of the motor. In the second condition, the second voltage is lower than or equal to a maximum boosted value to which the booster boosts the first voltage with a maximum boosting ratio. In the third condition, the second voltage is higher than or equal to a minimum boosted value to which the booster boosts the first voltage with a minimum boosting ratio.