Motor control apparatus and the magnetic pole position detection method

By utilizing the hysteresis characteristic of the motor, an object of robust to provide a motor control apparatus and a control method thereof perform magnetic pole position detection without being affected by the magnetic saturation of the motor rotor. A current profile generator 111 for generating a current profile, by calculating the exploration voltage pulse based on the current profile, the probe voltage calculator 110 for adding the d-axis voltage command, the magnetic pole position of the permanent magnet motor based on exploration voltage pulse a magnetic pole position detector 106 for detecting the polarity discrimination evaluation current calculation for calculating the polarity discrimination evaluation current to determine the magnetic pole polarity of the permanent magnet motor from d-axis current value of the motor current detected in synchronization with the cycle of the PWM control It comprises a vessel 108, a polarity detector 109 which outputs a phase correction value from the deviation between the polarity discriminating rated current and the current command, a.