Disengageable one-way mechanism for synchronous motors

Details Disengageable one-way mechanism for synchronous motors Disengageable one-way mechanism for synchronous motors

1986-11-06

1987-12-29

Wong, Peter S.

Electrical generator or motor structure

Dynamoelectric

Rotary

192 7, 310 78, 335 35, H02K 710

Patent

active

047163259

ABSTRACT:
A mechanism prevents the start-up of a synchronous a.c. motor in other than a desired direction. The mechanism includes a flexible arm having a finger that will engage a radially projecting abutment on the motor shaft. The finger blocks rotation of the shaft in a first direction and slides over the abutment when the shaft rotates in the opposite direction. A solenoid moves the arm and finger out of the path of the abutment shortly after the motor is energized, to allow the shaft to rotate in the first direction if the motor encounters an overload. Alternately, the arm may be formed of a bi-metal which is differentially heated by electrical current following motor energization to move the arm out of the path of the abutment.

REFERENCES:
patent: 2873848 (1959-02-01), Steinmetz
patent: 3225874 (1965-12-01), Woolley
patent: 3309635 (1967-03-01), Walker
patent: 3473058 (1969-10-01), Landgraf et al.
patent: 3501658 (1970-03-01), Morley
patent: 3747033 (1973-07-01), Bennett
patent: 3795075 (1974-03-01), Orzechowski

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