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. 02, 2004
Filed:
Mar. 19, 2002
Applicant:
Inventors:
Kiyonori Moroto, Kariya, JP;
Motoya Ito, Hekinan, JP;
Assignee:
Denso Corporation, Kariya, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02K 2/326 ;
U.S. Cl.
CPC ...
H02K 2/326 ;
Abstract
A DC motor includes an armature winding that includes a first coil group of a plurality of phase coils and a second coil group of a plurality of phase coils, a commutator, a brush unit that includes two pairs of brushes and a motor current supply device. The first and second coil groups are connected in series to a DC power source via the commutator and the two pairs of brushes to be supplied with motor current by the motor current control device. Therefore, voltage applied across the brushes and the commutator is reduced, and arc discharge is suppressed.