New Ac-Dc power converters with power factor correction

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The use of electrical equipment powered from the utility grid is rising dramatically and will continue to do so, mainly due to the demands of an information age. Action must be taken to meet the accompanying demand for energy to avoid dire economic consequences, but there is little desire to build expensive hydro-electric projects or polluting coal plants that contribute to global warning, and more research is needed before "green" sources like wind become common. Campaigns such as "FLICK-OFF" in Ontario and global events such as Earth Hour have stressed the need to conserve energy and to process it more efficiently.