Electricity: motive power systems – Induction motor systems – Primary circuit control
Patent
1994-09-09
1996-06-18
Shoop, Jr., William M.
Electricity: motive power systems
Induction motor systems
Primary circuit control
318778, 318782, 318781, H02P 142
Patent
active
055281206
ABSTRACT:
A starting circuit for a single-phase induction motor having a start capacitor, an auxiliary or start winding, and a run winding includes user adjustable pick-up voltage means to allow a user to select a pick-up voltage in the field to correspond to the pick-up voltage of a particular induction motor such that a relay disconnects the start winding from the power supply when the start winding voltage exceeds the selected pick-up voltage. Protective circuitry is provided including a timing circuit to protect from missetting of the pick-up voltage or when the motor will not start for any reason and a relay current circuit to control the current flowing in the relay to protect from high voltage overloading.
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Masih Karen
Sealed Unit Parts Co., Inc.
Shoop Jr. William M.
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