| 摘要 |
PROBLEM TO BE SOLVED: To provide an electric power steering device including a soft switching inverter, capable of improving steering feeling when an electric motor is rotated at low speed.SOLUTION: When a steering wheel 2 is in an operated state, and the rotational angular speed ω of a rotor is equal to or less than a predetermined value A, a mode switching control unit 89 determines that an electric motor 18 is rotated at low speed and sets the control mode of an SS control unit 88 to a second mode. Accordingly, when the electric motor 18 is rotated at low speed, respective relays 71 to 73 are maintained in ON states, and high side FETs 51, 53, and 55 are not subjected to soft switching. |
