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US 5,053,908 AGranted
PSC motor start system
AssigneeTexas Instruments Incorporated
InventorsLawrence E. Cooper, Richard L. Jenne
Life of this patent
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AssigneeTexas Instruments Incorporated
InventorsLawrence E. Cooper, Richard L. Jenne
Estimating the term…
A motor winding system having a main winding and a start winding circuit with a start winding and a PTC resistor in series therewith wherein the resistor is electrically removed from the circuit at a predetermined time after motor starting and remains in this state until motor shut off. The start winding circuit also includes a bimetallic switch in series with the resistor and a series circuit of a capacitor and an electromagnet in parallel with the resistor and switch. At motor start up, current from the main power source is applied across the main winding and the start winding circuit heats up the resistor and causes an increase in the resistance thereof. Also, current through the switch and PTC heat causes the bimetallic element to snap or move when it has reached a predetermined temperature to open the start winding circuit. Meanwhile, low current passes through the capacitor and electromagnet winding, energizing the electromagnet and causing the bimetallic element to be attracted and latched to the electromagnet after predetermined movement.
A motor system having a start winding and a main winding, comprising:
A motor system having a start winding and a main winding, comprising:
A motor system comprising:
A motor starting system comprising:
A motor starting system comprising:
Dependencies are inferred from the claim text.