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Interior permanent magnet synchronous motors (IPMSMs) are used in various applications. It is desirable to reduce the amount of Dy used in the rare-earth magnets contained in IPMSMs, but Dy-free magnets can easily be irreversibly demagnetized, leading to the performance degradation of IPMSMs. Thus, this study investigates the influence of the shape of the demagnetized area in a permanent magnet on...
Interior permanent magnet synchronous motors (IPMSMs) that employ rare-earth permanent magnets (PMs) containing dysprosium (Dy) are used in home appliances, electric vehicles and hybrid electric vehicles. However, it is desirable to reduce the amount of Dy used in such PMs due to its high cost. This study investigates the rotor structure of an IPMSM with a Dy-free rare-earth PM. Flux barrier shapes...
Permanent magnet (PM) motors that employ rare-earth magnets containing dysprosium (Dy) are used in electric and hybrid electric vehicles. However, it is desirable to reduce the amount of Dy used since it is expensive. This study investigates the rotor structure of a PM synchronous motor with a Dy-free rare-earth magnet. Flux barrier shapes and PM thicknesses that enhance the irreversible demagnetization...
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