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

Energies

Xiaofeng Ding²  Guanliang Liu²  Min Du²  Hong Guo²  Hao Qiao²  Christopher Gerada¹ 

[1]Department of Electrical and Electronic Engineering, the University of Nottingham, Nottingham NG7 2RD, UK

[2] E-Mail:

[3]School of Automation Science and Electrical Engineering, Beihang University, Beijing 100191, China

[4] E-Mails:

关键词: axial flux;    microelectromechanical system (MEMS);    efficiency;    power density;    magnetic equivalent circuit (MEC);    multi-objective firefly algorithm (MOFA);   

DOI  :  10.3390/en8076608

来源: mdpi

【 摘 要 】

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.

【 授权许可】

CC BY   
© 2015 by the authors; licensee MDPI, Basel, Switzerland.