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. 09, 1988
Filed:
Jun. 25, 1987
Applicant:
Inventors:
Robert S Lundin, Northfield, CT (US);
Demetris C Petritis, Athens, GR;
Assignee:
The Superior Electric Company, Bristol, CT (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02P / ;
U.S. Cl.
CPC ...
318254 ; 318342 ; 318430 ; 318599 ;
Abstract
A brushless D.C. motor drive circuit provides full available D.C. bus voltage to the motor during periods of motor speed acceleration and deceleration and modulated D.C. voltage to the motor during periods when no demands are made on the motor to accelerate or decelerate, thus avoiding time-lag problems inherent in the type of conventional brushless D.C. motor drive circuits which employ pulse-width modulators to continuously provide modulated D.C. voltage to the motor.