第19卷第6期 2011年6月
文章编号
1004-924X(2011)06-1306-07
光学精密工程
Optics and Precision Engineering
旋转式微发电机的设计与制造
孙韶春*，石庚辰
（北京理工大学机电工程与控制国家级重点实验室，北京100081）
Vol. 19No. 6
Jun.2011
摘要：为了实现旋转式微发电机对微系统的持续供电，研究了黄转式微发电机的设计、制造以及实验方法，首先，设计了具有单转子和单定子的三相、永磁同步微发电机模型。使用传统的磁路分析法得出了微发电机气隙磁密和感应电动势的表达式，确定了微发电机的主要设计参数。对模型进行有限元分析，得到了感应电动势波形，然后，利用精密加工技术加工了转子和定子各构件，并装配成为尺寸为（@7×2）mm的微发电机样机。最后，通过实验得出了微发电机在不同气除厚度和不同转建下的感应电动势实验结果显承，在气欧厚度为300m，转子转速为10kr/min时，微发电机的一相感应电动势蜂峰值为26.2mV；当接入0.23α的对称负载时，三相输出功率为3573W。结果表明，微发电机输出结果比较理想，有望作为微系统的电源装置。
关键调：微机电系统；微电源；微发电机；旋转式发电机
中图分类号：TM382
文献标识码：A
doi;10.3788/OPE.20111906.1306
Design and fabrication of micro rotational generators
SUN Shao-chun',SHI Geng-chen
(StateKey Laboratory for Mechatronic Engineering and Control,
BeijingInstituteof Technology,Beijing 10008l,China) Correspondingauthor,E-mail:sunshaochun66@gmail.com
Abstract: In order to provide continuous electric powers to micro systems by using micro rotational generators as power sources,the design approach, fabrication technique and test method of a micro rotational generator were researched. Firstly, a model of three-phase and permanent magnet synchronous generator with a rotor and a stator was designed, The formulas for air density and induced Electromotive Force(EMF) were given by a magnetic circuit analysis and main design parameters of the micro generator were determined, Then, Finite Element Analysis(FEA) was used to analyze the model to obtain the waveform of induced EMF. Further-more, the precise machining technique was used to fabricate the components of the rotor and stator and to as semble to a micro generator with a size of (@7 X2) mm'. Finally, micro generator was tested in varia tions of air-gap thickness and rotation speed. Experimental results indicate that with a air-gap thick ness of 300 μm and a rotation speed of 10 kr/min, the induced EMF in one phase is 26. 2 mV,p+ when symmetrical loads of o. 23 are connected to the generator, the sum of output power is 357. 3 μW. Compared to the FEA results, the micro generator shows an ideal output,which means that the gener-ator may be used in micro systems as the power sources.
收稿日期：2010-08-16；修订日期：2010-09-29. 基金项目：装备预研基金资助项目