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:
Feb. 16, 1993
Filed:
Feb. 26, 1991
Applicant:
Inventors:
Richard M Hutchison, New London, WI (US);
Don J Corrigall, Appleton, WI (US);
Assignee:
Miller Electric Mfg. Co., Appleton, WI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G05F / ; G05F / ; G05F / ;
U.S. Cl.
CPC ...
323250 ; 323254 ; 323302 ; 323331 ; 336160 ;
Abstract
A transformer having a shunt magnetic path and a shunt coil is provided. The transformer includes control circuitry to control the output of the transformer by controlling current flow in the shunt coil, thereby controlling the flux through the shunt magnetic path and the flux coupling with the secondary coil. The current in the shunt coil is phase-controlled and power for the control circuitry is derived from the current induced in the shunt coil.