Electrical generator or motor structure – Dynamoelectric – Rotary
Patent
1993-10-29
1994-09-06
Stephan, Steven L.
Electrical generator or motor structure
Dynamoelectric
Rotary
361 24, 318783, H02K 1100, H02H 708
Patent
active
053451260
ABSTRACT:
A protection circuit for a permanent split capacitor motor includes a positive temperature coefficient (PTC) resistor in series with the auxiliary winding of the motor for protecting the auxiliary winding during normal operation. At a predetermined temperature anomaly due to over-current conditions in the windings, the PTC resistor will sharply increase its resistance to a point wherein no current will pass, effectively open circuiting the auxiliary winding from the power source, thereby protecting the windings from damage. A thermally responsive protector may also be used in conjunction with the PTC resistor for providing further over-current protection to both the main and auxiliary windings.
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LaBalk Clayton E.
Stephan Steven L.
Tecumseh Products Company
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