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:
Mar. 04, 2003
Filed:
Aug. 16, 2000
Applicant:
Inventors:
Assignee:
Sankyo Seiki Mfg. Co., Ltd., Nagano-ken, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02K 1/100 ; H02K 5/00 ; H02K 5/16 ;
U.S. Cl.
CPC ...
H02K 1/100 ; H02K 5/00 ; H02K 5/16 ;
Abstract
A pulse width modulated brushless electric motor employs a conductive metal screw or similar connector to create a common potential between the stator core and the iron substrate on which the motor drive circuit is mounted. By approximately setting the common potential to, for example, the base line of the power source and motor drive circuit, the noise electromagnetically generated by the pulse width modulation is suppressed.