Motor driving device

摘要

A motor driving device includes an analog-to-digital conversion circuit to which a speed command voltage instructing a rotation speed of a motor is inputted, and a m icrocomputer for generating a speed command having a pulse w idth which is changed according to the speed command voltage based on an output signal of the analog-to-digital conversion circuit. Further, the motor driving devi ce includes a signal isolation unit for transmitting the spe ed command between an input and an output while providing is olation between the input and the output, and a drive circui t for generating a driving signal in response to the speed c ommand outputted from the signal isolation unit and to chang e the rotation speed of the motor.