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Motor market is moving to IE3/Premium and IE4/Super-Premium efficiency classes and a significant effort is being made by motor manufacturers to increase the rated efficiency without increasing significantly manufacturing and materials cost. Moreover, since line-operated squirrel-cage induction motors can be started with electronic soft starters, their stator windings may be designed to operate in...
In this paper, a novel ultra-compact, self-powered, high-efficiency, solid-state electronic device to reduce the energy consumption and improve the power factor at light load of direct-on-line, variable-torque, fixed-speed, three-phase, squirrel-cage induction motors, by means of a novel load-based stator-winding connection-mode management technique, is presented, including some technical and economic...
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