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Axial Flux Variable Gap Motor: Application in Vehicle Systems
ISSN: 0148-7191, e-ISSN: 2688-3627
Published March 04, 2002 by SAE International in United States
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Alternative electric motor geometry with potentially increased efficiency is being considered for hybrid electric vehicle applications. An axial flux motor with a dynamically adjustable air gap (i.e., mechanical field weakening) has been tested, analyzed, and modeled for use in a vehicle simulation tool at Argonne National Laboratory. The advantage of adjusting the flux is that the motor torque-speed characteristics can better match the vehicle load. The challenge in implementing an electric machine with these qualities is to develop a control strategy that takes advantage of the available efficiency improvements without using excessive energy to mechanically adjust the air gap and thus reduce the potential energy savings. Motor efficiency was mapped in terms of speed, torque, supply voltage, and rotor-to-stator air gap. Maps of optimal gap versus efficiency were used to develop a motor model and control strategy, which were incorporated into the PNGV Systems Analysis Toolkit vehicle modeling software.
CitationOh, S., Kern, J., Bohn, T., Rousseau, A. et al., "Axial Flux Variable Gap Motor: Application in Vehicle Systems," SAE Technical Paper 2002-01-1088, 2002, https://doi.org/10.4271/2002-01-1088.
- Patterson D. “Recent Advances in the Design and Construction of Axial Flux Permanent Magnet Machines,” Proc. of IEEE Aust. Summit Darwin 1996 435 440
- Patterson D. Spee R. “The Design and Development of an Axial Flux Permanent Magnet Brushless DC Motor for Wheel Drive in a Solar Powered Vehicle,” IEEE Trans. on IA 31 5 1995 1054 1061
- Caricchi F. Crescimbini F. Capponi F. Solero L “Permanent-Magnet, Direct-Drive, Starter/Alternator Machine with Weakened Flux Linkage for Constant-Power Operation Over Extremely Wide Speed Range,” Proc. of IAS'01
- Conlon B. “A Comparison of Induction, Permanent Magnet, and Switched Reluctance Electric Drive Performance in Automotive Traction Applications,” Advanced Propulsion & Emission Technology, GPC '01 32 47
- Jermakian J. Mohd M. Motevalli V. “Testing and Modeling of Variable Axial Flux Brushless DC Motor,” Argonne National Laboratory December 2000