Patent ID: 9054623
Filing Date: 2015-06-09
Classification: H02P

Abstract:
1. A motor control device comprising: a motor driving unit for driving a motor; a current vector controller for controlling a current of the motor by separating the current into a d-axis current and a q-axis current orthogonal to each other in accordance with a target command value from an outside; a magnetic-flux weakening current command generator for generating a d-axis current command controlling an amount of the d-axis current based on one of a difference between a first predetermined reference value and an absolute value of a voltage command from the current vector controller to the motor driving unit and a difference between a second predetermined reference value and a q-axis component of the voltage command; and one of a target command limiter and a q-axis current command limiter, the target command limiter for setting a limit value of the target command value from the outside based on a value by which the d-axis current command exceeds a negative upper limit, and the q-axis current command limiter for setting a limit value of a q-axis current command controlling an amount of the q-axis current.