Motor control device and motor control method

A motor control method comprising, by a controller that performs an arithmetic operation for voltage command values of d and q axes of a three-phase brushless motor through feedback control including integral control performed on current deviations between current detection values and current command values of the d and q axes and controls, on the basis of the voltage command values, a power converter that converts DC into AC and supplies the AC to the three-phase brushless motor;

• limiting an integrated value in the integral control within a predetermined range when the arithmetic operation for the voltage command values is performed, wherein
• the controller performs an arithmetic operation for the predetermined range in accordance with the current deviation, the integrated value, an electric motor constant of the three-phase brushless motor, an angular speed detection value of the three-phase brushless motor, control response angular frequencies of the d and q axes, and voltage upper limit values and voltage lower limit values of the d and q axes set on the basis of a power source voltage of the power converter.