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:
Jan. 19, 1988
Filed:
Mar. 31, 1986
Applicant:
Inventors:
David W Welch, Columbus, MS (US);
Dennis R McCully, Columbus, MS (US);
Assignee:
United Technologies Electro Systems, Inc., Columbus, MS (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02P / ;
U.S. Cl.
CPC ...
318341 ; 318603 ; 318254 ; 318439 ; 318327 ; 318314 ; 318318 ;
Abstract
A brushless DC motor control circuit for efficiently controlling motor speed is described. A digital circuit for providing centered pulse turn-on during that period when the specific winding is capable of providing torque for the desired direction of rotation to the rotor is described. Each phase has its own timing circuit including an initial delay-time interval and an on-time interval. These time intervals are set to obtain desired motor speed and efficient motor operation.