Motor control device

A motor control device configured to control drive of a motor including a motor winding, the motor control device comprising:

• an energization control unit that is configured to control energization of the motor winding in accordance with an encoder count value of a rotational position sensor that is configured to detect a rotational position of the motor;
• and
• a standstill determination unit that is configured to determine a standstill of the motor, wherein
• the energization control unit is configured to, when the standstill of the motor is detected, control energization in a change pattern, which is an energization pattern different from a preset regular pattern, in accordance with the detection value of the rotational position sensor, and
• the standstill determination unit is configured to determine, when the encoder count value of the rotational position sensor remains unchanged over a standstill determination time,
• that the motor is in a torque decrease region in which a torque of the motor drops, and
• that the standstill of the motor occurs.