Abstract
A three-phase induction motor was supplied from a single-phase public utility using a new and unique reconnection of the machine windings and three power capacitors to provide balanced currents and voltages in all of the windings and the corresponding three-phase high efficiency. Zero-crossing solid-state relays changed the capacitor values in response to load changes so that the single-phase efficiency was within 3% of the three-phase efficiency for all shaft loads between 20% and 120%. The single-phase power line power factor was near unity for a wide range of powers. This method is applicable to both high efficiency and standard three-phase motors without motor modifications.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">></ETX>
Published Version
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