Semiconductor device and motor control program

A motor control computer readable storage medium that outputs a motor control signal to an inverter that supplies power to a motor, and controls the motor via the inverter,

• wherein a Hall sensor that toggles a Hall signal when a rotation angle of the motor reaches a predetermined rotation angle is attached to the motor, the motor control computer readable storage medium causing a computer to function as:
• a speed detector configured to receive the Hall signal, and calculate, each time toggling of the Hall signal occurs, a first speed detection value representing a rotation speed of the motor based on a toggle time interval;
• when the toggle time interval based on the first speed detection value at present is set as a reference time, using an elapsed time from when the toggling of the Hall signal occurs, a speed correction circuit configured to calculate a second speed detection value by correcting the first speed detection value in a decelerating direction during a correction period from when the elapsed time exceeds the reference time until next toggling of the Hall signal occurs;
• and
• a speed controller configured to calculate a torque command value of the motor based on a speed deviation between the second speed detection value and a preset speed command value.