Electricity: motive power systems – Induction motor systems – Primary circuit control
Patent
1992-11-09
1993-09-21
Ip, Paul
Electricity: motive power systems
Induction motor systems
Primary circuit control
318785, 318781, 318795, H02P 144
Patent
active
052472361
ABSTRACT:
An auxiliary capacitance starting device is connected by only two wires to a permanent split capacitor motor. The device includes an auxiliary start capacitor and a control relay which has a set of normally closed contacts, a coil, and a resistor. The auxiliary start capacitor and the normally closed contacts are connected in series and the coil and resistor are connected in series and in parallel with the auxiliary start capacitor and contacts. The free ends of two non-polarized wire leads are interchangeably electrically connected to the start and run windings or the run capacitor of the motor to place the circuit in parallel with the start and run windings or the run capacitor such that the relay coil means becomes energized upon detection of voltage representing full motor speed to open the contacts and break the electrical connection between the auxiliary start capacitor and the start and run windings. The relay coil becomes de-energized upon detection of no voltage to close the contacts to allow the immediate re-application of electrical power to the common and run terminals of the motor. The components and circuitry are enclosed in a housing which may be mounted on a suitable surface in close proximity to the motor.
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Ip Paul
Roddy Kenneth A.
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