Switched shaded-pole type induction motor

Details Switched shaded-pole type induction motor Switched shaded-pole type induction motor

1985-08-06

1987-08-25

Salce, Patrick R.

Electrical generator or motor structure

Dynamoelectric

Rotary

310211, 310225, 318778, 318791, 318793, H02P 148, H02P 748

Patent

active

046895086

ABSTRACT:
A shaded pole induction motor includes a plurality of series-connected running windings and a plurality of series-connected shaded pole coils (windings). A normally closed, centrifugal-force-responsive switch is provided in series with the shaded pole coils to effect an interruption in current therethrough when the motor reaches a predetermined speed. As a replacement to the normally closed switch, a switch constituted by a relay winding and normally open relay contacts may be provided, the contacts being in series with the shaded pole coils, these normally open contacts being closed in response to high initial starting current in the running windings flowing through a relay winding and being opened again when the motor gets up to a predetermined speed; less current flows in the relay winding and in the running windings under this condition. A heat-responsive circuit breaker may be placed in series with the normally open contacts or centrifugal-force responsive switch.

REFERENCES:
patent: 4467257 (1984-08-01), Douthart et al.
patent: 4472670 (1984-09-01), Stanley

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