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:
May. 18, 2004
Filed:
Jan. 24, 2002
Applicant:
Inventor:
Masao Namai, Gunma, JP;
Assignee:
Sawafuji Electric Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B23B 7/04 ;
U.S. Cl.
CPC ...
B23B 7/04 ;
Abstract
In a control system for a motor-generator capable of functioning as a three-phase magnet-type synchronous motor after starting of an engine and functioning as a brushless DC motor before starting of the engine, a rotated-position detecting device is arranged to detect an induced voltage in each of three-phase coils included in the motor-generator and to detect a rotated position of a rotor based on such induced voltage. Thus, the rotated position of the rotor can be detected without use of a sensor, whereby the operation for assembling the motor-generator can be simplified.