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Title:: Optimization design of high-speed surgical power tools driving motor based on response surface methodology

作者:: 鲁自强1; 2; 李保国1; 耿晓斌1; 2; 张天逸1; 2; 程云章1; 2△; （1.上海理工大学健康科学与工程学院，上海 200093；2.上海理工大学上海介入医疗器械工程技术研究中心，上海 200093）

Author(s):: LU Ziqiang1; 2; LI Baoguo1; GENG Xiaobin1; 2; ZHANG Tianyi1; 2; CHENG Yunzhang1; 2; （1. School of Health Science and Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China；2. Shanghai Interventional Medical Device Engineering Technology Research Center, University of Shanghai for Science and Technology, Shanghai 200093）

Keywords:: High-speed surgical power tools; Permanent magnet brushless DC motor; Finite element simulation; Response surface method; Optimization design

摘要:: 为提高高速电动手术工具的转速和稳定性，本研究设计了一款转速为70 000 rpm的永磁无刷直流电机。首先，对电机本体、位置检测电路和换相控制电路的主要组成部分进行结构选型，并计算各项电磁参数；其次，在Ansys Maxwell电磁仿真软件中绘制电机模型，进行稳态与瞬态有限元仿真，验证其性能；最后，采用响应曲面法，建立以定子内径、转子外径、永磁体厚度为优化变量，空载电流为优化目标的优化方程，并分析求解。结果表明，优化设计后的永磁无刷直流电机，空载电流降低了57.8%，有效提升了高速电动手术工具应用的可靠性。

Abstract:: In order to optimize the speed and stability of high-speed electric surgical tools, we designed a permanent magnet brushless DC motor with a speed of 70 000 rpm. Firstly, the main components of the motor body, position detection circuit and commutation control circuit were structurally selected, and various electromagnetic parameters were calculated; Secondly，the motor model was drawn in Ansys Maxwell electromagnetic simulation software, and steady-state and transient finite states were carried out. Element simulation was used to verify its performance. Finally, the response surface method was used to establish an optimization equation with stator inner diameter, rotor outer diameter, permanent magnet thickness as optimization variables and no-load current as optimization target, analyze and solve it. The results showed that the no-load current of the optimized permanent magnet brushless DC motor was reduced by 57.8%.This study effectively improves the reliability in the application of high-speed electric surgical tools.