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:
Jul. 17, 2012
Filed:
Feb. 26, 2009
Mehdi Abolhassani, Austin, TX (US);
Thomas Keister, Georgetown, TX (US);
Alex Skorcz, Cedar Park, TX (US);
Ryan Edwards, Round Rock, TX (US);
Enrique Ledezma, Austin, TX (US);
Mehdi Abolhassani, Austin, TX (US);
Thomas Keister, Georgetown, TX (US);
Alex Skorcz, Cedar Park, TX (US);
Ryan Edwards, Round Rock, TX (US);
Enrique Ledezma, Austin, TX (US);
TECO—Westinghouse Motor Company, Round Rock, TX (US);
Abstract
A transformer module includes a main primary winding coupled to a first input power source to receive a medium voltage signal, multiple main secondary windings each to couple to a power cell of a drive system, and an auxiliary primary winding coupled to a second input power source to receive a low voltage signal. The auxiliary primary winding can be spatially separated from the main windings to increase leakage inductance. The auxiliary primary winding can be active during a pre-charge operation to pre-charge the power cells.