Single phase asynchronous motor

Details Single phase asynchronous motor Single phase asynchronous motor

1977-06-21

1978-10-10

Rubinson, Gene Z.

Electricity: motive power systems

Motor-reversing

Armature or primary circuit control

318221E, 318221H, 318229, H02P 144

Patent

active

041198948

ABSTRACT:
The invention relates to a single phase asynchronous motor having a main winding branch and an auxiliary winding branch for starting. The auxiliary branch has a first section having a first winding and a second section having a second winding and a capacitor in series. The second branch has a PTC resistor in shunt with the second winding and capacitor combination. This arrangement with the PTC resistor facilitates a design which involves selecting the number of turns and the resistance values of the auxiliary windings so that an optimum starting torque can be achieved at the cold temperature of the PTC resistor and a high breakdown torque can be achieved at the hot temperature of the PTC resistor.

REFERENCES:
patent: 3303402 (1967-02-01), Martin

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