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:
Aug. 25, 2015
Filed:
May. 05, 2014
Progress Rail Services Corp., Albertville, AL (US);
John Franklin Kral, Plainfield, IL (US);
Sidarta Fornari Beltramin, Curitiba, BR;
Progress Rail Services Corporation, Albertville, AL (US);
Abstract
A traction motor drive system may include a plurality of armatures arranged in parallel with each other. The traction motor drive system may also include a plurality of field circuits arranged in series with one another, where each field circuit is associated with a respective one of the armatures. The plurality of field circuits may be arranged in parallel with the plurality of armatures. The traction motor drive system may also include a field isolation system. The field isolation system may include a shunt circuit associated with at least one of the field circuits. The shunt circuit may have a first and second shunt terminal. The field isolation system may also include a first field switch arranged in series with the plurality of field circuits. The first field switch may be configured to switch between the first shunt terminal of the shunt circuit and a first field terminal of at least one of the field circuits. The field system may also include a second field switch, arranged in series with the plurality of field circuits. The second field switch may be configured to switch between the second shunt terminal of the shunt circuit and a second field terminal of at least one of the field circuits.