Shunt field control apparatus and method

Electricity: motive power systems – Field or secondary circuit control – Plural – diverse or diversely connected or controlled field...

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318251, 318252, 318529, H02P 506

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active

043706037

ABSTRACT:
A field shunt operation for a chopper controlled series DC propulsion motor in the power mode is provided in response to a desired torque request, when a predicted value of the resulting shunt field motor current is determined to be no greater than the known commutation current limit of the chopper.

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J. J. Moxie et al., "Propulsion Control for Passenger Trains Provides High-Speed Service", Westinghouse Engineer, Sep. 1970, pp. 143-149.
B. J. Krings, "Alternative Systems for Rapid-Transit Propulsion and Electrical Braking", Westinghouse Engineer, Mar. 1973, pp. 34-41.

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