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Development of an axial flux MEMS BLDC micromotor with increased efficiency and power density

Ding, Xiaofeng; Liu, Guanliang; Du, Min; Guo, Hong; Qiao, Hao; Gerada, C.

Authors

Xiaofeng Ding

Guanliang Liu

Min Du

Hong Guo

Hao Qiao

C. Gerada



Abstract

This paper presents a rigorous design and optimization of an axial flux microelectromechanical systems (MEMS) brushless dc (BLDC) micromotor with dual rotor improving both efficiency and power density with an external diameter of only around 10 mm. The stator is made of two layers of windings by MEMS technology. The rotor is developed by film permanent magnets assembled over the rotor yoke. The characteristics of the MEMS micromotor are analyzed and modeled through a 3-D magnetic equivalent circuit (MEC) taking the leakage flux and fringing effect into account. Such a model yields a relatively accurate prediction of the flux in the air gap, back electromotive force (EMF) and electromagnetic torque, whilst being computationally efficient. Based on 3-D MEC model the multi-objective firefly algorithm (MOFA) is developed for the optimal design of this special machine. Both 3-D finite element (FE) simulation and experiments are employed to validate the MEC model and MOFA optimization design.

Journal Article Type Article
Publication Date Jun 30, 2015
Journal Energies
Electronic ISSN 1996-1073
Publisher MDPI
Peer Reviewed Peer Reviewed
Volume 8
Issue 7
APA6 Citation Ding, X., Liu, G., Du, M., Guo, H., Qiao, H., & Gerada, C. (2015). Development of an axial flux MEMS BLDC micromotor with increased efficiency and power density. Energies, 8(7), https://doi.org/10.3390/en8076608
DOI https://doi.org/10.3390/en8076608
Keywords axial flux; microelectromechanical system (MEMS); efficiency; power density; magnetic equivalent circuit (MEC); multi-objective firefly algorithm (MOFA)
Publisher URL http://www.mdpi.com/1996-1073/8/7/6608
Copyright Statement Copyright information regarding this work can be found at the following address: http://creativecommons.org/licenses/by/4.0
Additional Information Correction at http://www.mdpi.com/1996-1073/9/1/62

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Copyright Statement
Copyright information regarding this work can be found at the following address: http://creativecommons.org/licenses/by/4.0





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