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Patent Searching and Data


Title:
CONTINUOUSLY VARIABLE DYNAMIC BRAKE FOR A LOCOMOTIVE
Document Type and Number:
WIPO Patent Application WO/2013/095721
Kind Code:
A3
Abstract:
This disclosure is directed to a traction motor drive system (200). The traction motor drive system (200) may include a field winding subsystem (202) comprising a field winding (105) associated with a traction motor (103). The traction motor drive system (200) may also include an armature subsystem (201) arranged in parallel with the field winding subsystem (202). The armature subsystem (201) may include an armature (104) having first and second armature terminals and a grid resistor (211) selectively electrically coupled in series with the armature (104). The armature subsystem (201) may also include an armature chopper (212) arranged in parallel with the grid resistor (211) and electrically coupled in series with the armature (104). The armature chopper (212) may be configured, when the grid resistor (21 1) is electrically coupled to the armature (104), to conditionally conduct current to the armature (104).

Inventors:
KRAL JOHN FRANKLIN (US)
BELTRAMIN SIDARTA FORNARI (BR)
Application Number:
PCT/US2012/053981
Publication Date:
August 15, 2013
Filing Date:
September 06, 2012
Export Citation:
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Assignee:
PROGRESS RAIL SERVICES CORP (US)
KRAL JOHN FRANKLIN (US)
BELTRAMIN SIDARTA FORNARI (BR)
International Classes:
B60L3/00; B60L3/04; B60L7/04; B60L7/08; H02P3/12; H02P5/685
Domestic Patent References:
WO2006020587A22006-02-23
Foreign References:
DE19637713A11998-03-19
US5323095A1994-06-21
EP1385261A22004-01-28
EP0578366A21994-01-12
Attorney, Agent or Firm:
CHEEK, John, J. et al. (Peoria, IL, US)
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