Fault responsive means for changing control sequence of a...

Details Fault responsive means for changing control sequence of a... Fault responsive means for changing control sequence of a...

B - Operations, Transporting

60

L

342/34

B60L 9/12 (2006.01)

Patent

CA 1201516

FAULT RESPONSIVE MEANS FOR CHANGING CONTROL SEQUENCE OF A MULTIPLE-BRIDGE ELECTRIC POWER CONVERTER ABSTRACT OF THE DISCLOSURE In the propulsion system of an electric locomotive, a-c wayside power is converted to direct current for the traction motors by means of several phase-controlled rectifying bridges having serially connected outputs The bridges are controlled sequentially so that their respective output voltages are introduced in stages as increasing amounts of voltage are required at the motors of an accelerating locomotive. Normally certain thresholds of speed need to be attained before the second bridge, and later the third bridge, are permitted to be phased on. Means is provided for changing the bridge control sequence in response to faults in the first or second bridges.

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