Magnetic field presetting circuit for an exciter field winding i

Details Magnetic field presetting circuit for an exciter field winding i Magnetic field presetting circuit for an exciter field winding i

1980-09-15

1982-09-07

Truhe, J. V.

Electricity: motive power systems

Generator-fed motor systems having generator control

Control of both the generator and the motor

318151, H02K 2300

Patent

active

043486207

ABSTRACT:
A traction vehicle propulsion system comprises a d-c motor and an excitation generator for separately exciting the motor field. Current in the field winding of the excitation generator is normally controlled by a control circuit which is arranged to prevent vehicle misdirection due to control circuit failure modes wherein normal excitation current is not supplied. The control circuit comprises means responsive to an acceleration command signal for temporarily removing the field winding from the normal control circuit and for placing it instead in a biasing circuit comprising low impedance paths to the respective terminals of a direct voltage source, thereby presetting the magnetic field of the field winding in the proper direction to prevent vehicle misdirection upon acceleration from rest.

REFERENCES:
patent: 3492556 (1970-01-01), Friend
patent: 3684937 (1972-08-01), Reeves et al.
patent: 3798520 (1974-03-01), Friend et al.
patent: 3974429 (1976-08-01), Friend et al.
patent: 4188569 (1980-02-01), Campbell

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