Apparatus for operating plural poly phase A.C. motors having a c

Details Apparatus for operating plural poly phase A.C. motors having a c Apparatus for operating plural poly phase A.C. motors having a c

1983-08-16

1985-06-25

Shoop, William M.

Electricity: motive power systems

Plural, diverse or diversely controlled electric motors

Synchronizing or phasing control

318100, 318650, H02P 552

Patent

active

045256560

ABSTRACT:
Described is an operating system for a plurality of poly phase alternating current motors having a common load, said alternating current motors including a first motor which is a synchronous induction motor and a second motor which is a synchronous induction motor or a synchronous motor, and driving said load in synchronism through respective connecting means connecting said alternating current motors to said load, each of said alternating current motors having respective phase field windings excited variably by direct current supplied by separate excitor circuits. The system comprises antiparallel connected thyristor means provided to one of said exciter circuits of said first motor and means for sensing the gap between the internal phase angles of said first and second motors and supplying gate control signals to said thyristor means provided to said exciter circuit of said first motor.

REFERENCES:
patent: 3596155 (1971-07-01), Huxtable
patent: 3611080 (1971-10-01), Herzog
patent: 3718846 (1973-02-01), Bejach
patent: 3735217 (1973-05-01), Kilgore et al.
patent: 3991349 (1976-11-01), Watson et al.
patent: 4056759 (1977-11-01), Mitsui et al.
patent: 4135118 (1979-01-01), Seeger et al.
IBM Technical Disclosure Bulletin, vol. 18, No. 4, pp. 1106-1107, Sep. 1975.

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