SEMICONDUCTOR INTEGRATED CIRCUIT AND MOTOR DRIVE DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a motor drive device capable of improving efficiency.SOLUTION: A motor drive device includes a brushless motor. The motor drive device includes a position sensor that outputs a position detection signal synchronized with the phase of an induction voltage of a coil of the brushless motor. The motor drive device includes a control circuit that supplies a drive voltage of a pseudo sine wave to the coil of the brushless motor on the basis of a command signal specifying the position detection signal and the number of rotations to control the driving of the brushless motor.