Abstract: A microprocessor operated controller device and associated method for modifying an AC input power to provide a reduced power AC output power to a load when coupled to the controller device. The AC output power has a series of cut-out pulses in each half cycle of the AC output power waveform. The device includes a switching system having a plurality of switching elements for positioning the series of cut-out pulses in each half cycle of a waveform of the AC input power to result in said reduced power AC output power and a switch control system for coordinating opening and closing of the plurality of switching elements during positioning of the series of cut-out pulses. The switch control system includes a synchronization system for synchronizing the switching system with timing of each half cycle of the AC input power waveform.

Abstract: A method and system for continuously predicting an input line power waveform frequency of alternating current having maximum and minimum values, and a reference value located therebetween by specifying an outer window defining a sense point of the waveform between lower and upper limits of the outer window, the sense point being located away from the reference value and having a corresponding predicted sense point time; providing an inner window having an inner time interval less than an outer time interval corresponding to time between the lower and upper limits; positioning the inner window at the predicted sense point time; identifying an actual sense point time of a measured inner sense point value and excluding one or more identified actual outer sense point values being both outside of the inner time interval and within the outer time interval; and calculating the frequency of a future cycle of the waveform.

Abstract: A method and system for continuously predicting an input line power waveform frequency of alternating current having maximum and minimum values, and a reference value located therebetween by specifying an outer window defining a sense point of the waveform between lower and upper limits of the outer window, the sense point being located away from the reference value and having a corresponding predicted sense point time; providing an inner window having an inner time interval less than an outer time interval corresponding to time between the lower and upper limits; positioning the inner window at the predicted sense point time; identifying an actual sense point time of a measured inner sense point value and excluding one or more identified actual outer sense point values being both outside of the inner time interval and within the outer time interval; and calculating the frequency of a future cycle of the waveform.

Abstract: A microprocessor operated controller device and associated method for modifying an AC input power to provide a reduced power AC output power to a load when coupled to the controller device. The AC output power has a series of cut-out pulses in each half cycle of the AC output power waveform. The device includes a switching system having a plurality of switching elements for positioning the series of cut-out pulses in each half cycle of a waveform of the AC input power to result in said reduced power AC output power and a switch control system for coordinating opening and closing of the plurality of switching elements during positioning of the series of cut-out pulses. The switch control system includes a synchronization system for synchronizing the switching system with timing of each half cycle of the AC input power waveform.

Abstract: A controller device and corresponding method for modifying an AC input power to provide a reduced power AC output power to a load when coupled to the controller device. The AC output power has a series of cut-out pulses in half cycles of the AC output power waveform. The device includes a switching system having a plurality of switching elements for positioning the series of cut-out pulses in the half cycles of a waveform of the AC input power to result in said reduced power AC output power; and a switch control system for coordinating opening and closing of the plurality of switching elements during positioning of the series of cut-out pulses. The switch control system includes a synchronization system for synchronizing the switching system with timing of said half cycles of the AC input power waveform; wherein the series of cut-out pulses includes at least two cut-out pulses having different durations and different positioning in said half cycles.