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:
Oct. 28, 1986
Filed:
Nov. 09, 1984
Applicant:
Inventor:
Thomas C Matty, N. Huntingdon Township, Irwin County, PA (US);
Assignee:
Westinghouse Electric Corp., Pittsburgh, PA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02P / ; H02M / ;
U.S. Cl.
CPC ...
318811 ; 363 41 ;
Abstract
An adjustable frequency AC motor drive control system includes pulse width modulation control of an inverter coupled with the motor and a programmed microprocessor which generates a cosine wave in cooperation with a sine wave and a carrier wave to provide a synthesized sine wave voltage to the motor by controlling the conduction of power switches at a rate higher than the fundamental frequency of the sine wave voltage output.