Patent ID: 7755306

Claim:
An electric power control device comprising: a first polyphase AC motor including a star-connected first polyphase winding as a stator winding; a second polyphase AC motor including a star-connected second polyphase winding as a stator winding; a first power storage device supplying electric power to said first and second polyphase AC motors; a vehicle-mounted load electrically connected between a first neutral point of said first polyphase winding and a second neutral point of said second polyphase winding; a request voltage calculation portion calculating a request voltage for said vehicle-mounted load; voltage control portion controlling a voltage across said first and second neutral points in accordance with the request voltage calculated by said request voltage calculation portion; and a first inverter receiving a first signal from said voltage control portion and a second inverter receiving a second signal from said voltage control portion, said first inverter setting a potential of said first neutral point at a potential that is higher than a potential of said second neutral point set by said second inverter, wherein said request voltage for said vehicle-mounted load is controlled by said voltage control portion.