Stepper motor control device, movement, timepiece and stepper motor control method

Abstract

The invention relates to a stepper motor (100) control device (107) comprising a drive unit (106) that drives a stepper motor including a rotor that rotates a pointer and a winding that generates a magnetic flux to rotate the rotor, a control unit (103) that sends a drive pulse to the drive unit to rotate the rotor and an oscillation pulse to oscillate the rotor, a voltage detection unit (105) that detects an induced voltage generated in the winding when the rotor oscillates, and a determination unit (104) that, based on a result of the detection by the voltage detection unit, determines a mechanical load received by the rotor