Importance

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Abstract

An electronic startup device and a method of using it for single phase induction motors, such as those used in hermetic compressors, and permanent capacitor motors may save energy by eliminating energy consumption after the startup period of the motor. The electronic startup device may comprise a circuit including a unidirectional electronic switch which connects a start winding of an induction motor to an alternating voltage source through a thermistor or a solid state pill, which defines the starting time of the motor, and to a full wave rectifier. A timing circuit may activate the unidirectional electronic switch disconnecting the thermistor from the rest of the circuit during an adjustable turning off time.

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First Claim