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Correction published on 21 January 2016, see Energies 2016, 9(1), 62.

Open AccessArticle
Energies 2015, 8(7), 6608-6626; doi:10.3390/en8076608

Development of an Axial Flux MEMS BLDC Micromotor with Increased Efficiency and Power Density

1
School of Automation Science and Electrical Engineering, Beihang University, Beijing 100191, China
2
Department of Electrical and Electronic Engineering, the University of Nottingham, Nottingham NG7 2RD, UK
These authors contributed equally to this work.
*
Author to whom correspondence should be addressed.
Academic Editor: Paul Stewart
Received: 2 April 2015 / Revised: 14 May 2015 / Accepted: 27 May 2015 / Published: 30 June 2015
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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. View Full-Text
Keywords: axial flux; microelectromechanical system (MEMS); efficiency; power density; magnetic equivalent circuit (MEC); multi-objective firefly algorithm (MOFA) axial flux; microelectromechanical system (MEMS); efficiency; power density; magnetic equivalent circuit (MEC); multi-objective firefly algorithm (MOFA)
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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MDPI and ACS Style

Ding, X.; Liu, G.; Du, M.; Guo, H.; Qian, H.; Gerada, C. Development of an Axial Flux MEMS BLDC Micromotor with Increased Efficiency and Power Density. Energies 2015, 8, 6608-6626.

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