Driving circuit for brushless DC motor

摘要

A driving circuit for a brushless DC motor provided with an element for detecting the angular position of the rotor of the motor, characterized in that by the output of the differential amplifier for amplifying the output of the detecting element, a switching element is rendered on and off during a certain portion of the duration of the output of the detecting element and that the motor is rotated at a constant speed by applying a rotation control voltage to an element for energizing the stator winding of the motor during the non-conductive period.