| 摘要 |
PURPOSE: A motor drive control apparatus is provided to achieve improved accuracy of control of motor drive by sensing the magnet on a rotation shaft and rotational frequency of the shaft through the use of a hall sensor. CONSTITUTION: A motor drive control apparatus comprises a magnet(15), a hall sensor(20), a comparator(30), and a micro computer(40). The magnet is shaft-coupled to a rotor(13) of a motor(10) and disposed on a predetermined position on a rotating shaft(14) protruded outward from a motor case(11). The hall sensor senses the magnet on the rotating shaft during rotation of the motor, and detects the rotational frequency of the motor. The comparator takes, as an input, a hall signal output from the hall sensor, compares the received hall signal with a reference level, and outputs a pulse signal. The micro computer obtains the rotation velocity and rotational frequency of the rotating shaft from the pulse signal output from the comparator, calculates the rotation velocity and rotational frequency of the motor, and controls drive of the motor with reference to the calculated rotation velocity and rotational frequency of the motor.
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