INVESTIGATION OF A 3-PHASE ASYNCHRONOUS SINGLE-MACHINE REVERSIBLE FREQUENCY-CONVERTER

Operating conditions of three-phase asynchronous single-machine freque ncy converters with two working heteropole magnetic fields in the main magnetic circuit are investigated. New schemes of rotor and stator wi ndings are shown. Their electromagnetic parameters are investigated by means of m.m.f. polygons. Results of the investigation and analysis o f a single-machine reversible frequency converter for 50/60 Hz multipl ication and 60/50 Hz division with a power rating of up to 10 kV.A are given. (C) 1997 Elsevier Science Ltd. All rights reserved.