POWER SUPPLY OF VENTILATION BLDC MOTOR

摘要

PURPOSE: A BLDC motor power supply device of a ventilation machine and a ventilation machine with the same are provided to perform the drive and the control of the BLDC motor applied on the ventilation machine by steadily supplying operating voltage. CONSTITUTION: A BLDC motor power supply device of a ventilation machine comprises a power transformer(T1) and first and second rectifier circuits(D1~D4,D5~D8). The BLDC motor power supply device of the ventilation machine comprises a constant voltage regulator(U1). The power transformer generates AC voltage for controlling a fan motor and AC voltage for driving the fan motor. The first and the second rectifier circuits rectify the AC voltage for controlling a fan motor and the AC voltage for driving the fan motor respectively. The voltage regulator stabilizes the fan motor control DC voltage rectified in the first rectifier circuit. A power transformer(LF1) for removing electromagnetic wave is equipped at the front end of the power transformer.