field rheostat

field rheostat

[′fēld ¦rē·ə‚stat]
(electricity)
A rheostat used to adjust the current in the field winding of an electric machine.
References in periodicals archive ?
The excitation may be controlled manually by the operator's motor-operated exciter field rheostat or automatically by the PRX-400B voltage regulator in response to the terminal voltage and current of the synchronous generator.