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:
Dec. 25, 1979
Filed:
Jul. 29, 1971
Applicant:
Inventor:
Robert L Risberg, Milwaukee, WI (US);
Assignee:
Cutler-Hammer, Inc., Milwaukee, WI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02P / ;
U.S. Cl.
CPC ...
318308 ; 3183 / ; 363138 ; 363 27 ;
Abstract
A 'chopper' type armature current control system for a D.C. motor when connected across the output of a rectifier, A.C. to D.C. type supply source that is characterized by having closed-loop regulating control, and having overhauling load energy dissipating circuit which is automatically connected between the motor armature circuit and the low potential side of the source output whenever the potential across the output sides of the source exceeds a predetermined value. A modified form provides addition of a fixed D.C. potential to afford enhanced speed of system response, and controlled slow speed reverse operation of the motor.