Power conversion device, motor module, and electric power steering device

A power conversion device that converts power from a power supply into power to be supplied to a motor having n-phase windings, where n is an integer of three or more, the power conversion device comprising:

• a first inverter which includes n legs connected to first ends of the respective phase windings of the motor;
• a second inverter which includes n legs connected to second ends of the respective phase windings of the motor;
• and
• a control circuit which performs Pulse Width Modulation (PWM) control of switching elements of the first and second inverters according to at least one switching scheme;
• wherein
• the n-phase windings, the n-legs of the first inverter, and the n-legs of the second inverter define H bridges of the n phases, and each of the H bridges of the n phases includes a pair of legs;
• and
• for the H bridges of the respective phases, the control circuit performs PWM control according to the at least one switching scheme that turns on a high-side switching element in one of the pair of legs and then switches a low-side switching element in the other of the pair of legs or turns on a low-side switching element in one of the pair of legs and then switches a high-side switching element in the other of the pair of legs.