| 摘要 |
Provided are an electric power steering device which is capable of determining a failure without using a motor current, and an electric power steering device which removes any motor current detecting unit for detecting the motor current such as a shunt resistor, and suppresses the heat generation and the power loss in the device, thereby making it possible to realize the downsized device, a reduction in the costs, and the higher efficiency. An electric power steering device according to the present invention includes: a motor coupled with a steering system; a drive control unit for controlling a drive of the motor; a motor impression voltage detecting unit for detecting an applied voltage of the motor; and an abnormality determining unit for determining abnormality based on a comparison result of the detected motor impression voltage and an output voltage of the drive control unit.
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