Patent ID: 6724157
Filing Date: 2004-04-20
Classification: H05B

Abstract:
An energy savings device for an inductive or resistive load that is powered by an input AC voltage waveform, comprising:a setting unit configured to allow a user to set a desired power operating level for the load; a microprocessor configured to receive a signal from the setting unit indicative of the desired power operating level for the load, to determine a phase delay to be provided to an output AC voltage waveform that is to be provided to the load, and to output a control signal as a result thereof; and an active element provided between a line that provides the input AC voltage waveform and the load, the active element receiving the control signal and turning off and on at predetermined times in accordance with the control signal, so as to create the output AC voltage waveform from the input AC voltage waveforms, wherein the load is connected to a neutral line, and wherein the energy savings device is not connected to the neutral line and thereby operates as a two-wire device.