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:
Jun. 04, 2002
Filed:
Jan. 13, 2000
Applicant:
Inventors:
Assignee:
NSK, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01R 3/946 ; H02K 1/300 ; H02P 7/50 ;
U.S. Cl.
CPC ...
H01R 3/946 ; H02K 1/300 ; H02P 7/50 ;
Abstract
A brushless DC-motor driving controller is provided which can significantly reduce torque fluctuations in the brushless DC motor. The brushless DC-motor driving controller uses a position detector, generates rotation-angle signals representing rotor-rotation angles or a part thereof in high resolution, uses the rotation-angle signals, and performs rectangular-wave driving. By using the rotation-angle signals, the brushless DC-motor driving controller compensates for electrical angles corresponding to commutation-position skews in rectangular-wave driving which are caused by armature reaction in a brushless DC-motor.