Electricity: motive power systems – Induction motor systems – Primary circuit control
Reexamination Certificate
2006-01-03
2006-01-03
Ro, Bentsu (Department: 2837)
Electricity: motive power systems
Induction motor systems
Primary circuit control
C318S782000
Reexamination Certificate
active
06982539
ABSTRACT:
A motor starting device employs a relay to connect and disconnect an auxiliary start capacitor in parallel with the existing start capacitor of a single-phase split-capacitor induction motor. The relay is normally closed and in the initial state connects the auxiliary start capacitor in parallel with the existing start capacitor. After a source of alternating current voltage is connected to the motor, a control circuit energizes the relay to disconnect the auxiliary start capacitor after a delay time. When the source of alternating current voltage is disconnected from the motor, a relay protection circuit maintains the relay switch open until the charge has dissipated from both the existing start capacitor and the auxiliary start capacitor.
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Diversitech Corporation
Ro Bentsu
Smith , Gambrell & Russell, LLP
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