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:
Jul. 22, 2003
Filed:
Nov. 29, 2001
Applicant:
Inventors:
Ted T. Lin, Saratoga, CA (US);
Ryan C. Lin, Saratoga, CA (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02K 3/714 ; H02K 3/700 ; H02P 8/00 ;
U.S. Cl.
CPC ...
H02K 3/714 ; H02K 3/700 ; H02P 8/00 ;
Abstract
A two-phase step motor with bifilar winding around the stator poles is connected to phases &agr; and &bgr; (90° apart) of a two-phase driver in a manner that maximizes torque at medium speed operation and minimizes vibrations. In particular, the coils that are wound around different groups of stator poles are connected in series. In one set, both coils are connected in a forward sense around the stator, while in the other set, the two coils are connected in opposite senses. All coils are energized in every phase of a pulse cycle. The properties are intermediate between that of convention series and parallel stator coil connections.