H - Electricity – 02 – K
Patent
H - Electricity
02
K
H02K 11/00 (2006.01) H02H 7/09 (2006.01) H02K 17/08 (2006.01)
Patent
CA 2085202
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.
Ridout & Maybee Llp
Tecumseh Products Company
LandOfFree
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