Centrifugal switching device of single-phase induction motor

Details Centrifugal switching device of single-phase induction motor Centrifugal switching device of single-phase induction motor

2011-07-19

2011-07-19

Luebke, Renee (Department: 2833)

Electricity: circuit makers and breakers

Centrifugal

Liquid contact

C310S06800R

Reexamination Certificate

active

07982147

ABSTRACT:
A centrifugal switching device of a single-phase induction motor includes a centrifuge and pressure switches. The centrifuge includes a centrifugal sleeve, a centrifugal base, shaft coupling blocks, and a spring. The spring is directly fitted on the centrifugal base. Under a centrifugal force generated by the rotation of the motor, shaft coupling blocks I and II slide axially against an axial force of the spring, thus forcing an axial end surface of the centrifugal sleeve to be separated from contacts of the pressure switches, such that a starting winding of a stator ferrite-core coil of the single-phase induction motor is disconnected and a heater is turned on. The shaft coupling blocks I and II adopt a design with round transition, central sliding contact, and smooth rotation, thereby achieving a simple structure, convenient mounting, and safety usage.

REFERENCES:
patent: 3691415 (1972-09-01), Hancock et al.
patent: 4661732 (1987-04-01), Gehrt
patent: 5153471 (1992-10-01), Ottersbach
patent: 6710271 (2004-03-01), Spedale et al.

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