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. 03, 1996
Filed:
Aug. 31, 1994
Applicant:
Inventors:
Russel J Kerkman, Milwaukee, WI (US);
David Schlegel, Saukville, WI (US);
Calvin C Steinweg, Hartford, WI (US);
Assignee:
Allen-Bradley Company, Inc., Milwaukee, WI (US);
Primary Examiner:
Int. Cl.
CPC ...
H02P / ;
U.S. Cl.
CPC ...
318811 ; 318798 ; 318806 ; 318254 ; 318138 ;
Abstract
A method and apparatus used with a motor controller having a PWM inverter for eliminating discontinuities in a stator current that are caused by noise, command signal discontinuities and feedback corrections. While noise, discontinuities, and correction can cause multiple crossings between a carrier signal and a command signal during a half cycle of a carrier signal, the present invention only allows a single crossing during any carrier signal half cycle to effect motor operation.