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:
Apr. 17, 1984
Filed:
Mar. 05, 1982
Applicant:
Inventor:
Ralph D Jessee, Lima, OH (US);
Assignee:
Westinghouse Electric Corp., Pittsburgh, PA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02M / ; H02M / ;
U.S. Cl.
CPC ...
363 41 ; 363 98 ; 363132 ;
Abstract
A pole switch firing control for a pulse width modulated inverter controls pole switch operation under steady state operating conditions such that the inverter output duplicates a reference signal waveform after a fixed time delay. Pole switch operating time for a given pulse in an inverter output cycle is measured and subtracted from a fixed time interval to get a delay time. In the succeeding output cycle, the corresponding pulse is produced by initiating the pole switch operating sequence after the delay time, thereby causing the pole switch to operate a fixed time following the reference signal.