FAN DRIVE DEVICE

摘要

A FAN DRIVE DEVICE IS NOT AFFECTED BY VARIATIONS IN THE STRENGTH OF THE FAN DRIVE MOTOR ROTOR MAGNET OR THE COMPONENTS OF THE CIRCUIT FOR DETECTING FAN DRIVE MOTOR INDUCTION VOLTAGE, OR BY THE CAPACITANCE OF A HIGH CAPACITANCE CAPACITOR IN THE DC SUPPLY CIRCUIT AND CAN THEREFORE DETECT WITH GOOD PRECISION AND WITHOUT ADDING COMPONENTS THE SPEED OF A HIGH VOLTAGE, PWM DRIVE FAN DRIVE MOTOR WHEN DRIVEN BY AN EXTERNAL FORCE SUCH AS THE WIND. THE FAN DRIVE DEVICE DETECTS DRIVE MOTOR SPEED USING A PLURALITY OF SIGNALS OBTAINED FROM HALL ICS DISPOSED IN THE FAN DRIVE MOTOR FOR DETECTING THE ROTOR MAGNET POSITION AND PROHIBITS FAN DRIVE MOTOR DRIVE WHEN THE FAN DRIVE MOTOR SPEED IS DETECTED TO EXCEED A SPECIFIC THRESHOLD VALUE. FIG 1