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:
Nov. 09, 1999
Filed:
Jul. 23, 1996
Hiroshi Murakami, Suita, JP;
Kazushige Narazaki, Katano, JP;
Yukio Honda, Katano, JP;
Naoyuki Kadoya, Kadoma, JP;
Masayuki Shinto, Sabae, JP;
Hiroshi Ito, Takefu, JP;
Yoshinari Asano, Takefu, JP;
Matsushita Electric Industrial Co., Ltd., Osaka-fu, JP;
Abstract
A brushless motor having at least one current influence detector (10a, 10b, 10c) for detecting influence of an induced voltage caused by variations of current flowing in an armature winding (3). Furthermore, a positional signal detecting circuit means (11) detects a positional signal corresponding to rotational position of the rotor (2) in accordance with the voltage signal appearing at the armature winding (3) and the output signal issued from the at least one current influence detector (10a, 10b, 10c).