Motor control circuit having series or compound excitation durin

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

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318521, 318252, 318297, H02P 118

Patent

active

054122988

ABSTRACT:
A motor control circuit provides series or compound excitation during starting and shunt excitation during normal running. A switch responsive to the motor speed, the armature current, the armature EMF, or the like, includes terminals connected to the series winding and a series winding bypass to permit switching between a compound series and a shunt configuration. In addition, a tap may be provided on the series winding for providing intermediate characteristics, and separate switches for the series and shunt field windings may also be provided.

REFERENCES:
patent: 3569809 (1971-03-01), Comer
patent: 3670225 (1972-06-01), Kitaoka et al.
patent: 3845368 (1974-10-01), Elco
patent: 5310016 (1994-05-01), Rudelle

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