Patent ID: 6750563
Filing Date: 2004-06-15
Classification: H02M

Abstract:
A device for selectively receiving electric power from an AC power source oscillating at a system frequency, adjusting the voltage of the power, and delivering a corresponding voltage-corrected AC power supply to a connected load; comprising:a transformer; a modulating switch connected in series with the transformer operable between an open configuration and a closed configuration for selectively connecting the AC power source to the transformer; and a control unit operative for: in response a voltage sag or over-voltage condition of the AC power source, selectively gating the modulating switch between the open configuration and the closed configuration multiple times per cycle of the system frequency to generate the voltage-corrected AC power supply for delivery to the load, and in response to a cessation of the voltage sag or over-voltage condition, discontinuing patina of the modulation switch.