BLDC MOTOR DRIVING DEVICE

摘要

PURPOSE: A BLDC motor driving device is provided to stably drive a motor by maintaining a compulsory driving mode for a time when the driving mode of a BLDC motor is converted from the compulsory driving mode to a self driving mode. CONSTITUTION: A feedback section detects an electromotive force according to the rotation of a motor and generates a first control signal which is proportional to the speed of the motor. A control section outputs a mode selecting signal according to the mode. The motor is initially controlled in a compulsory mode and is converted to a self driving mode if a first control signal is inputted. The controlling section outputs a first control signal and second and third control signals by comparing the object speed of the motor. A motor driving section adds or subtracts the driving current of a motor according to the control of the controlling section. A driving stabilizing section delays the second and third controlling signals from being transferred to the motor driving section if the controlling section is converted from the compulsory driving mode to a self driving mode.