Losses Calculation and Ventilation Cooling of Air-Cooled Axial-Flux Permanent Magnet Asynchronous Couplings

Yu, Linxin; Zhao, Xin‐Huai; Wang, Dazhi; Bao, Xue

doi:10.1109/ccdc.2018.8408007

Cited by 1 publication

(1 citation statement)

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“…One of the advantages of AFPM machines is the inherent self-ventilation and heat extraction due to their disc-shape rotor structure. While single sided AFPM machines can be cooled with a natural air or fan system [21], [22], stronger liquid cooling is commonly used in combination with the YASA machine [4], [7], [23], [24]. In the case of the YASA machine, the stator is sandwiched between two rotors and therefore the heat dissipation area may be less than that of a single stator AFPM structure.…”

Section: Specifications Of the Topologies Comparedmentioning

confidence: 99%

Evaluating the Effects of Electric and Magnetic Loading on the Performance of Single and Double Rotor Axial Flux PM Machines

Taran

Heins

Rallabandi

et al. 2020

IEEE Trans. on Ind. Applicat.

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Axial flux PM (AFPM) machines are used particularly in applications requiring a compact structure. Their disc shape topology and axial air-gap have led to a variety of configurations including two popular ones: the yokeless and segmented armature (YASA), and the single-stator singlerotor or single sided machine. In this study, a comprehensive comparative analysis of these configurations is conducted at different magnetic and electric loadings. It is found that at lower loadings, typically employed for air-cooled machines, the torque/ampere characteristics of the YASA machine are almost identical to those of a single sided machine constructed with half the magnet volume. On the other hand, the single sided machine outperforms the YASA machine when the magnet volumes in both machines are maintained equal. However, for higher electric loadings, the torque/ampere characteristics of the YASA machine droop significantly less than those of the single sided machine. The paper includes analytical estimations which are verified with experimentally validated FEA simulations. In addition, the impacts of the armature reaction on saturation and the magnetic flux linkage, the magnet losses and eddy current losses in both machines are also explored. Index Terms-Axial flux permanent magnet, yokeless and segmented armature, YASA, armature reaction, power factor, eddy current losses, magnet losses, torque production.

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