synchronous motor excited by permanent magnets is a promising design. The present invention concerns a multi-strand design of a transverse flux machine with unilateral stator and rotor, with essentially U-shaped yokes (6) and I-shaped yokes (3) in the stator, as well as a rotor with permanent magnets (5) that are attached planar and a circular back iron (4). The bending of the U-shaped yokes (6) at a right angle results in a considerable reduction of the leakage paths.
In general, transversal flux machines feature a comparably high torque density (torque per machine weight). Consequently, a transversal flux machine of relatively low weight is able to provide a high mechanical power output. Additionally, very high efficiencies (up to 97%) in comparison to an asynchronous machine (90%) can be reached. A joint use of the stator yoke by several strands results in a considerable increase in the torque density, as compared to known embodiments. The direct cooling of winding and stator iron makes it possible to have a machine design with considerably reduced eddy current losses.
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PVA Mecklenburg-Vorpommern AG
Phone: +49 (0)381/49 74 74 0
Moritz v. Grotthuss, Dr. Rüdiger Werp
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