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:
Jul. 27, 1999
Filed:
Oct. 02, 1997
Applicant:
Inventor:
William M Hallidy, Glendora, CA (US);
Assignee:
Other;
Primary Examiner:
Int. Cl.
CPC ...
H02P / ; H02P / ;
U.S. Cl.
CPC ...
318494 ; 318493 ; 318434 ; 388803 ; 388806 ;
Abstract
The DC electrical motor system includes a motor having an armature DC transducer coupled to an armature current controller by a sensor/detector arrangement to control the armature current. A field DC transducer coupled to a field current controller by another sensor/detector arrangement facilitates the control of the field current. An armature-field comparator is coupled to the field current controller to help control the field current when the motor armature windings are short-circuited through windings in the armature field comparator.