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M. Hofer, M. Schrödl:
"An Analysis of Ferrite Magnet Assisted Synchronous Reluctance Machines for Low Power Drives Including Flux Weakening";
Poster: IEEE International Electric Machines and Drives Conference (IEMDC), San Diego, Kalifornien; 12.05.2019 - 15.05.2019; in: "Proceedings of the IEEE International Electric Machines and Drives Conference (IEMDC)", (2019), S. 650 - 655.

In this paper permanent magnet assisted synchronous reluctance machines are investigated for low power industrial drives. Several drive applications require a constant power demand over a wide speed range up to high rotational speeds. Therefore, electrical drives are usually operated in the flux weakening range. In addition, a high efficiency, a high power factor, low product as well as low operational costs are reasonable demands for future electrical drives. The proposed machine type without rare earth material is a potential candidate for such requirements. The level of pre-magnetization at permanent magnet assisted synchronous machines is not only the key parameter to reach high torque densities, but also mainly responsible to adjust the machine power and the power factor in the flux weakening region. By finite element analysis the Vshape and straight magnet arrangement type rotors with three flux barriers are discussed. Different types of ferrites and the amount of magnets are varied to show the influence on the machine parameters and performance. Further, for a sufficient operation at high speeds a mechanical stress analysis is included. The anti-demagnetization behavior is discussed and results in a limitation of the V-shape topology.

Synchronous Reluctance Machine, Permanent Magnet Synchronous Machine, Industrial Drive

http://dx.doi.org/10.1109/IEMDC.2019.8785297

https://publik.tuwien.ac.at/files/publik_287000.pdf