Motor control device

A motor control device, comprising:

• an inverter that converts a direct current (DC) voltage supplied from a DC power source into an alternating current (AC) voltage and applies the AC voltage to a motor by PWM control;
• a calculation unit that detects a bus current of the inverter using a resistor connected between the DC power source and the inverter and calculates, on a basis of the bus current, a motor current flowing through the motor at intervals of a predetermined control period;
• a speed estimation unit that estimates a motor speed on a basis of a detection current that is a motor current detected by being calculated by the calculation unit;
• and
• a current control unit that controls the motor current such that the speed estimated by the speed estimation unit is a command speed,
• the current control unit including an integrator that performs integral control at intervals of the predetermined control period and stopping performing the integral control in a control period in which the detection current could not be detected.