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

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

H - Electricity

02

P

318/14

H02P 5/50 (2006.01) H02P 5/747 (2006.01)

Patent

CA 1211786

ABSTRACT OF THE DISCLOSURE In an operating system for a plurality of poly phase alternating current motors having a common load, the alternating current motors include a first motor which is a synchronous in- duction motor, and a second motor which is a synchronous induc- tion motor or a synchronous motor. The load is driven in synchronism through respective connecting devices connecting the alternat- ing current motors to the load. Each of the alternating current motors have respective phase field windings excited variably by direct current supplied by separate exciter circuits. The system comprises antiparallel connected thyristors provided for one of the exciter circuits of the first motor, and sensor for sensing the gap between the internal phase angles of the first and second motors and supplying gate control signals to the thyristors provided for the exciter circuit of the first motor.

435303

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