Apparatus for starting and running a plurality of three-phase mo

Details Apparatus for starting and running a plurality of three-phase mo Apparatus for starting and running a plurality of three-phase mo

1986-09-22

1988-05-17

Smith, Jr., David

Electricity: motive power systems

Induction motor systems

Reversing

318817, H02P 144

Patent

active

047453486

ABSTRACT:
An apparatus for starting and running a plurality of three-phase motors from a single-phase power source is described. Two of the main coils of a three-phase motor are used to run the motor as a single-phase induction motor. The third coil of a three-phase motor is used as a starting coil and is selectively powered through a switch and a capacitor. The capacitor provides the necessary difference in the phase angle of the current in the starting coil and the main coils to provide starting torque for the operation of the motor.

REFERENCES:
patent: 602921 (1898-04-01), Steinmetz
patent: 4642545 (1987-02-01), Lewus

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