基于多目标优化的低速大力矩超声电机设计  

Design of Low-Speed and High-Torque Ultrasonic Motor Based on Multi-Objective Optimization

作　　者：刘军 牛瑞坤 张益铭 朱华[3] LIU Jun;NIU Ruikun;ZHANG Yiming;ZHU Hua(Nanjing Research Institute of Electronics Technology,Nanjing 210039,China;Jinling Institute of Technology,Nanjing 211169,China;State Key Laboratory of Mechanics and Control of Mechanical Structures,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China)

机构地区：[1]南京电子技术研究所,江苏南京210039 [2]金陵科技学院,江苏南京211169 [3]南京航空航天大学机械结构力学及控制国家重点实验室,江苏南京210016

出　　处：《压电与声光》2024年第6期894-901,共8页Piezoelectrics & Acoustooptics

基　　金：国家重点基础研究发展计划资助项目(2015CB057500)。

摘　　要：低速、大力矩是超声电机的重要特性之一,电机外径尺寸对该特性有正相关影响。为增强超声电机的低速大力矩特性而不增大电机外径,提出了基于电机定子特征参数的多目标优化方法。该方法以自研的TRUM-70HA样机为研究对象,以定子齿面法向振幅与切向速度的数值比(简称幅速比)为低速大力矩特性表征参数,利用ANSYS优化设计平台AWE对其定子进行参数化建模,实现了对定子特征参数的多目标优化。制作了优化后的第二代样机TRUM-70HB,并搭建了电机机械特性测试平台。测试结果显示,优化后的70HB最大转速从65 r/min降低到50 r/min,降幅为23.1%;最大堵转力矩从1.2 N·m增大到2.4 N·m,增幅为100%。该研究成果有助于节省电机的应用空间。Low-speed and high-torque are crucial characteristics of an ultrasonic motor,and they are positively correlated with the outer diameter of the motor.A multi-objective optimization method based on stator feature parameters is proposed to improve the low-speed and high-torque characteristics without increasing the outer diameter of the motor.For demonstration,this study considers a TRUM-70HA prototype motor as the research object.The ratio between the normal amplitude and tangential velocity of the stator teeth is used as the characterization for low-speed and high-torque characteristics.The parametric stator modeling of the 70HA is conducted using the ANSYS Workbench Environment.The multi-objective adaptive optimization of stator feature parameters is conducted.A second generation optimized prototype motor named TRUM-70HB is considered,and its mechanical performance is evaluated.The experimental results show that the maximum speed of the 70HB decreases from 65 r/min to 50 r/min,a decrease of 23.1%,and the maximum stall torque rises from 1.2 N·m to 2.4 N·m,an increase of 100%.The findings help save space in the manufacture of ultrasonic motors.

关 键 词：超声电机 低速大力矩特性 多目标优化 机械特性曲线 

分 类 号：TM359.9[电气工程—电机]