AC locomotive operation without DC current sensor

Prime-mover dynamo plants – Electric control – Engine control

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290 40A, 290 40C, 290 40D, 290 40E, 290 40F, 322 10, 322 14, 322 24, F02N 1106, H02P 904

Patent

active

059988800

ABSTRACT:
A system and method for controlling operation of a diesel electric traction vehicle of the type including a synchronous generator driven by a diesel engine for producing alternating current (AC) electric power, the AC electric power being converted to direct current (DC) electric power and transferred over a DC link to a plurality of DC to AC inverters, and each of the inverters being coupled to transfer controlled frequency power to at least one AC electric traction motor coupled in driving relationship to at least one wheel-axle set of the vehicle. A computer-based control system controls operation of the engine, generator and inverters in response to a power command signal. The control system computes power supplied by the generator from calculated torque developed by the AC traction motors and electric power losses in the inverters and other circuit elements coupling power from the generator to the motors. The computed generator supplied power is compared to the power command signal and engine operation is adjusted so as to minimize any difference between the commanded power and the computed power.

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"Open Loop Electronic Cyliner Pressure Balancing for Diesel Engine in Locomotive Application," R. Volpe, Jr., SA Patel, Serial No. 08/813,124 (GE docket 20-DD-1825) filed Mar. 7, 1997.

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