PT Journal AU Sekerak, P Hrabovcova, V Onufer, M Rafajdus, P Kalamen, L TI Losses, Efficiency and Thermal Behavior of the Synchronous Motors with Different PM Materials SO Communications - Scientific Letters of the University of Zilina PY 2013 BP 46 EP 54 VL 15 IS 11 DI 10.26552/com.C.2013.2A.46-54 WP https://komunikacie.uniza.sk/artkey/csl-201311-0008.php DE NdFeB; ferrite; synchronous motor; efficiency; thermal behavior; V - curves SN 13354205 AB The paper deals with losses, efficiency and thermal behavior of the synchronous machines with different permanent magnet (PM) materials. Three PMSM are presented in this paper: First, the PMSM with NdFeB PM, which is really constructed. Second, the NdFeB was replaced by ferrites PM. Third, the new design of synchronous motor with ferrites is presented. The volume of PM and the whole size are increased to keep the same power output. Equivalent circuit parameters, EMF, V-curves, losses, efficiency and thermal behavior of all three machines are investigated and compared. ER