用于斯特林热机的动圈式直线电机设计与分析  

Design and performance testing of moving coil linear motor for Stirling generator

作　　者：贾红书[1,2] 洪国同[1] 陈厚磊[1] 

机构地区：[1]中国科学院理化技术研究所,北京100190 [2]中国科学院研究生院,北京100049

出　　处：《电机与控制学报》2011年第12期21-25,共5页Electric Machines and Control

基　　金：国家自然科学基金(5106112)

摘　　要：为了研制用于自由活塞斯特林发电机的直线电机,完成动圈式直线电机结构设计,模拟并测试电机磁场强度,对发电机的输出特性进行实验研究。采用有限元软件ANSYS计算电机的磁场密度,并与测试结果进行比较,气隙宽度为6 mm时,磁通密度为626 mT,计算结果与测试值一致;搭建动圈式发电机的输出特性测试系统,进行实验研究。实验结果表明,磁场中线圈长度和电机频率不变时,有效输出电压随线圈位移线性增大,斜率与线圈阻抗和外接负载有关;系统的固有频率计算值为16.5 Hz,当工作频率远离系统固有频率时,电机输出电流随工作频率的增大而变小,系统效率最高为20%。In order to develop linear motor for free piston Stirling generator,moving coil linear motor structure was designed.Magnetic field of the motor was obtained by finite element simulation and testing,and the output characteristic were studied.The calculated results of magnetic field using the finite element software ANSYS meet the experimental results,and the results show that magnetic flux density achieved 626 mT at the air-gap is 6 mm.Experimental system for testing output characteristics of the moving coil motor was established.Output characteristics testing of moving coil linear motor was conducted.The results show that effective output voltage increases linearly with displacement at constant magnetic field strength,coil length and moving frequency.The slope is the function of coil impedance and external load.Moreover,the output voltage increases at load resistance under conditions of same input voltage at a constant coil displacement.The calculatied natrual frequency is 16.5 Hz.The output current of the motor decreases with the increasing of work frequency away from the system natural frequency,and the efficiency of the system is 20%.

关 键 词：动圈式直线电机 自由活塞斯特林发电机 磁通密度 输出特性 频率 

分 类 号：TM34[电气工程—电机]