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World Electric Vehicle Journal is published by MDPI from Volume 9 issue 1 (2018). Articles in this Issue were published by The World Electric Vehicle Association (WEVA) and its member the European Association for e-Mobility (AVERE), the Electric Drive Transportation Association (EDTA), and the Electric Vehicle Association of Asia Pacific (EVAAP). They are hosted by MDPI on mdpi.com as a courtesy and upon agreement with AVERE.
Open AccessArticle

Assessment of Axial Flux Motor Technology for Hybrid Powertrain Integration

GKN EVO eDrive Systems Ltd, Unit 14, Woking Business Park, Woking GU21 5JY, U.K.
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World Electr. Veh. J. 2015, 7(2), 187-194; https://doi.org/10.3390/wevj7020187
Published: 26 June 2015
PDF [987 KB, uploaded 18 May 2018]

Abstract

Axial flux (AF) motors and generators have been used in niche automotive applications for many years. Given their disk like shape they offer distinct advantages for integration into hybrid powertrains where available length is limited. An overview of axial machine topologies is given and the design and performance laws that govern the sizing of axial flux permanent magnet machines are presented. Based on the analytical laws described it is shown that an axial machine can achieve significantly more torque than a size comparable radial machine. 3D finite element analysis is used to fine-tune designs and to investigate loss mechanisms. A P2 hybrid module case study is used to show the benefits and challenges of the axial topology when compared to the radial one. The cooling system of the machine is presented in order to show how the integration of coolant passages could be achieved. The possibility of introducing heat barriers into a hybrid powertrain, decoupling the hybrid module from the rest of the powertrain, is also presented. The predicted performance of the machine is presented and compared to the initial test results.
Keywords: Axial Flux; Hybrid Module; P2 Hybrid; Electric Machine; Hybrid Powertrain Axial Flux; Hybrid Module; P2 Hybrid; Electric Machine; Hybrid Powertrain
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Lampérth, M.U.; Malloy, A.C.; Mlot, A.; Cordner, M. Assessment of Axial Flux Motor Technology for Hybrid Powertrain Integration. World Electr. Veh. J. 2015, 7, 187-194.

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