Variable speed control for a brushless direct current motor

摘要: A variable speed control for an encoderless, brushless, direct current motor. An input signal, representing a desired of the motor, is received by both power supply and counter. The counter responsively issues sequence signals corresponding to particular motor windings be energized. voltage in accordance with signal as well. error corrector circuit connected senses waveform on winding when indicates that not If deviates from predetermined standard, gives correction command supply. accordingly increases or decreases voltage.