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:
May. 28, 1985
Filed:
Apr. 03, 1984
Applicant:
Inventor:
Alberto Abbondanti, Penn Hills, PA (US);
Assignee:
Westinghouse Electric Corp., Pittsburgh, PA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01R / ; H02P / ;
U.S. Cl.
CPC ...
318490 ; 318805 ; 318811 ;
Abstract
In a voltage-source inverter AC power supply, the AC currents are measured exclusively by sampling the DC current in the DC link between voltage-source and inverter. Each sample so derived is correlated to the status of the switches in the inverter at the instant of sampling, or before and after a change in the switching status of the inverter. This technique applies more generally to pulse-width modulation applications, but also to an adjustable voltage input (AVI) inverter motor drive.