Mitsubishi Denki Kabushiki Kaisha

Mitinaga Suzuki

Keiichi Nishikawa

Atsuo Onoda

Yukio Izumi

Hidetada Nagaoka

Yuuji Oomura

Kiyotaka Hoshi

A brushless motor driving circuit is provided for obtaining a reliable starting and stable rotation driving irrespective of the load condition of the motor. The brushless motor driving circuit has a terminal voltage detector located at each phase of the armature windings of the motor, a terminal voltage compensator for adding or subtracting a compensation value to/from the terminal voltage of the armature windings detected at respective phases during actual driving periods, and a comparator for comparing respective terminal voltages to obtain a rotor location signal after compensation has been performed. The compensation value is determined by a resistor of the armature winding and a winding current. The armature windings are driven by the rotor location signal detected at the comparator.

Growing community of inventors

Fukushima, Japan

Mitinaga Suzuki