Design, Analysis of a Seven-Phase Fault-Tolerant Bi-Harmonic Permanent Magnet Machine With Three Active Air Gaps for In-Wheel Traction Applications - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue IEEE Transactions on Energy Conversion Année : 2024

Design, Analysis of a Seven-Phase Fault-Tolerant Bi-Harmonic Permanent Magnet Machine With Three Active Air Gaps for In-Wheel Traction Applications

Résumé

For the requirements of in-wheel traction systems, a new motor is proposed based on a specific property of multiphase machines: the ability in vector control to develop smooth torque at low speeds by using simultaneously the first and third harmonics to generate p and 3p polarities. From an initial fault-tolerant seven-phase axial–flux machine with two outer axial rotors for small vehicles such as moto/scooter is born the proposed motor just by adding magnets in the cylinder closing the two 2p-pole axial rotors of initial in-wheel motor, this addition creates thus a third radial rotor with 3p poles without changing the global volume. With an increase by 51% of the torque density, this more expensive motor can be considered in comparison with the initial in-wheel motor as a modular solution. With the same volume, more constraining torque requirements for higher acceleration and slopes can be obtained. The possibility to use different polarities with quite non-sinusoidal emf but without increase of the torque ripples e is verified in 3D-FEM simulation and in a manufactured 28 slots prototype with 12/36 poles. Experimental results are given to prove the effectiveness of the proposal.
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Dates et versions

hal-04409059 , version 1 (22-01-2024)

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J. Gong, X. Wang, B. Zhao, F. Tan, Eric Semail, et al.. Design, Analysis of a Seven-Phase Fault-Tolerant Bi-Harmonic Permanent Magnet Machine With Three Active Air Gaps for In-Wheel Traction Applications. IEEE Transactions on Energy Conversion, 2024, pp.1-13. ⟨10.1109/tec.2023.3305291⟩. ⟨hal-04409059⟩
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