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Low-Cost Interior Permanent Magnet Machine With Multiple Magnet Types
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DOI：10.1109/TIA.2020.2966458.png)
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摘要
En 中文
This article is a contribution to answer the following question: Is it possible to design a permanent magnet machine with the performance expected from rare-earth magnets but at a lower cost? Performance being understood as torque, size, efficiency, demagnetization, and temperature rise together. The question is addressed with a systematic exploration of different interior permanent magnet machine topologies mixing rare-earth and ferrite permanent magnets. The study starts from a production baseline, the Prius 2010 traction motor, with interior magnets placed in a single V pattern. It investigates various rotor designs, most specifically, single V and double V patterns as well as spoke configurations. The stator cross-section design and winding selection are fixed, providing a solid comparison basis from the point of view of machine cooling. For each rotor design, torque potential and machine material cost are assessed, the latter expressed as torque per dollar. A promising configuration was found based on a spoke pattern for which further modeling was performed to assess efficiency as well as mechanical strength and resistance to short circuits and to demagnetization. It reduces the rare-earth magnet volume by over 60%.
Keyword:
Magnetic flux
Ferrites
Torque
Rotors
Magnetostatics
Reluctance motors
Traction motors
Cost
ferrite
finite-element analysis (FEA)
interior permanent magnet (IPM) machine
magnetostatics
rare earth
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期刊
IF:
4.5
论文数:
1.1W
被引数:
3.5W
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