Magnet-Less Electrical Machines are Characterized by a High Material Availability and therefore Predestined for a Broad Application in Hybrid and Electric Cars (Poster Presentation)

Authors

Dr. H. Schäfer, hofer eds GmbH, Würzburg

Year

2014

Print Info

Fortschritt-Berichte VDI, Reihe 12, Nr. 777

Summary

During the last years, the introduced hybrid cars with electrical machines, integrated into transmissions, were mainly based on rear ear magnet excited synchronous machine, because the machine size, compared to other kinds of electrical machines, is normally smaller. Also in electrical axle drives, this kind of machine is dominant at this time with few exceptions e.g. the Tesla electric car (high power induction machine) or the Renault electric car (separately excited synchronous machine). Due to limited global availability of rear ear magnets, especially of dysprosium, the costs of this material are very high. Therefore OEMs and automotive suppliers are pushing the so called “magnet-less” electrical machines.