Motor control device, current control method applied to motor control device, and electric power steering device using motor control device

Abstract

Provided is a motor control device () for controlling a motor () provided with a plurality of sets of windings, in which, when a current control unit () detects a short-circuit failure as a primary failure, the current control unit () continues the control, and, further, when the current control unit () detects a secondary failure, the current control unit () provides control of opening a power supply relay (). Accordingly, in a case where a failure of a winding of a motor or an inverter occurs, a torque pulsation is restrained and a sufficient output torque is provided, and further, in a case where a secondary failure occurs, excessive heat generation and current consumption are prevented and the cost of the device is reduced.