The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 01, 1997
Filed:
Jan. 06, 1995
Hidetada Nagaoka, Kanagawa, JP;
Atsuo Onoda, Kanagawa, JP;
Yukio Izumi, Kanagawa, JP;
Keiichi Nishikawa, Kanagawa, JP;
Yuuji Oomura, Kanagawa, JP;
Mitinaga Suzuki, Fukushima, JP;
Kiyotaka Hoshi, Fukushima, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
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.