螺线管线圈式MEMS永磁电动机的热分析  

Thermal analysis of a solenoid coil MEMS permanent-magnet motor

作　　者：黄志平 吴玉莹 王文斌 朱凯云 吴瀚枭 雷凯博 徐天彤[1] HUANG Zhiping;WU Yuying;WANG Wenbin;ZHU Kaiyun;WU Hanxiao;LEI Kaibo;XU Tiantong(National Key Laboratory of Science and Technology on Aero-Engine Aero-thermodynamics,Beihang University,Beijing 100191,China)

机构地区：[1]北京航空航天大学航空发动机气动热力国家级重点实验室,北京100191

出　　处：《航空动力学报》2023年第10期2383-2394,共12页Journal of Aerospace Power

基　　金：航空发动机气动热力国家级重点实验室基金(6142702190509,6142702190510);先进航空动力创新工作站(HKCX2020-02-015)。

摘　　要：针对一种螺线管线圈式MEMS(微机电系统)永磁电动机进行了热分析并给出了初步测温方案。介绍了此MEMS永磁电动机的总体设计方案,选用单晶硅衬底内二氧化硅绝缘的绕组达到散热性能优异的目的,利用ANSYS的稳态传热和静结构力学模块进行热固耦合模拟。在此基础上,通过数值模拟验证了电动机静子温度分布均匀,可将绕组和衬底视为无温度梯度。通过热固耦合模拟,得出不发生膨胀失配的最大工作温度为86℃和相应的最大发热损耗功率为2.83 W,据此预估电动机的额定工作性能,验证了本电动机的耐温能力和高功率密度潜力,最终设计的额定输出功率为0.362 W,计算的设计功率密度为0.117 W/g。A thermal analysis of a solenoid coil type MEMS permanent-magnet motor was conducted,and the preliminary temperature measurement plan was given.The overall design scheme of this MEMS permanent-magnet motor was introduced.The windings with silicon dioxide insulation inside the single crystal silicon substrate were selected to achieve the purpose of excellent heat dissipation performance.The thermal-structural coupling simulation was carried out by using the steady-state heat transfer and static structure mechanics modules of ANSYS.On this basis,it was verified by numerical simulation that the temperature distribution of the motor stator was uniform,and the winding and the substrate without temperature gradient can be considered.Through thermal-structural coupling simulation,it was concluded that the maximum operating temperature without expansion mismatch was 86℃and the corresponding maximum heat loss power was 2.83 W.Based on this,the rated operating performance of the motor was estimated,and the temperature tolerance capacity and high power density potential of the motor were verified.The rated output power of the final design was 0.362 W,and the calculated design power density was 0.117 W/g.

关 键 词：电动机热分析 MEMS电动机 永磁电动机 MEMS螺线管线圈 膨胀失配 

分 类 号：V242.44[航空宇航科学与技术—飞行器设计]