Protective circuit for a separately excited d-c motor

Details Protective circuit for a separately excited d-c motor Protective circuit for a separately excited d-c motor

1983-10-11

1986-02-04

Moose, Jr., Harry E.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Motor protective condition responsive circuits

318 87, 361 87, H02H 708

Patent

active

045689962

ABSTRACT:
The magnitudes of currents in the armature and field windings of a separately excited d-c motor are compared, and a fault signal is produced in response to the field current magnitude either rising above a first reference level (which varies as a first predetermined function of the armature current magnitude) or falling below a second reference level (which varies as another predetermined function of the latter magnitude).

REFERENCES:
patent: 3435289 (1969-03-01), Aselman, Jr.
patent: 3558978 (1970-04-01), Nye, Jr. et al.
patent: 3612950 (1971-10-01), Knott
patent: 4103211 (1978-07-01), Gardner et al.

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