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.

Date of Patent:
Dec. 12, 1995

Filed:

Jun. 10, 1994
Applicant:
Inventor:

Geoffrey B Lansberry, Cambridge, MA (US);

Assignee:

Westinghouse Electric Corp., Pittsburgh, PA (US);

Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02M / ; H02P / ; H02P / ;
U.S. Cl.
CPC ...
363 41 ; 318801 ; 318811 ;
Abstract

A waveform flat-topping unit includes a signal generator for producing first, second and third reference signals and a normalizing unit for normalizing the first reference signal. A waveform generator produces a third harmonic waveform of the normalized first reference signal. A comparator compares a vector value, which is produced according to the first, second and third reference signals, to a predetermined threshold value, the predetermined threshold value being the largest realizable pure signal value. An adder in response to the comparison, adds zero to each of the first, second and third reference signals when the vector value is less than or equal to the predetermined threshold value. The adder adds the third harmonic signal to each of the first, second and third reference signals when the vector value is greater than the predetermined threshold value.


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