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:
Aug. 02, 1988
Filed:
Feb. 27, 1987
Applicant:
Inventor:
Robert S Lundin, Northfield, CT (US);
Assignee:
The Superior Electric Company, Bristol, CT (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02P / ; H02K / ;
U.S. Cl.
CPC ...
310 / ; 318293 ; 318739 ;
Abstract
A circuit for operating a brushless DC motor, the circuit receiving as inputs the positive/negative, or negative/positive DC power normally applied to reverse a brush-type DC motor, with the polarity of the input power determining direction of rotation of the motor. The input power is full-wave rectified to provide positive/negative DC power to the brushless DC motor drive. A polarity sense circuit determines the polarity of the input DC power and provides to the brushless DC motor drive a logic signal indicating commanded direction.