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:
Mar. 14, 1978
Filed:
Dec. 17, 1976
Applicant:
Inventor:
Chandler A Johnson, III, Sussex, WI (US);
Assignee:
General Electric Company, Erie, PA (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02P / ;
U.S. Cl.
CPC ...
318338 ; 318331 ; 3183 / ; 318326 ;
Abstract
A control circuit for a direct current motor having separately excited armature and field windings and operable in both the constant torque and constant horsepower modes includes a speed control circuit having a transfer characteristic providing an extremely high gain at lower frequencies and a low gain, for example unity, at higher frequencies and further includes means to reduce the low frequency gain when motor operation is switched from the constant torque to the constant horsepower mode.