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. 13, 1997
Filed:
Dec. 28, 1994
Applicant:
Inventors:
Yoshihiro Okuyama, Tendou, JP;
Koichi Seno, Tendou, JP;
Assignee:
Mitsumi Electric Co., Ltd., , JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02P / ;
U.S. Cl.
CPC ...
388804 ; 318254 ;
Abstract
A control circuit adapted to control a motor includes a first circuit part for generating an excitation current to be supplied to the motor and having a predetermined period that is dependent on a predetermined rotation period of the motor, and a second circuit part for superimposing on the excitation current pulses having a period that is small compared to the predetermined period of the excitation current.