基于Taguchi 方法的三相混合式步进电机电磁结构优化

doi:10.16180/j.cnki.issn1007-7820.2021.12.002

Abstract

Abstract:

The tooth layer area of a hybrid stepping motor is the key to its torque generation. To achieve specific performance, the appropriate tooth layer geometry needs to be selected during motor design. In this study, the shape parameters of the trapezoidal tooth are optimized, and the electromagnetic structure of the motor is optimized to achieve a higher torque output. Specifically, an existing three-phase hybrid stepping motor in the market is used as a prototype. Based on its structural parameters, an efficient three-dimensional finite element model is established to generate optimized samples. Then, combined with the Taguchi optimization algorithm, the stator and rotor tooth shape parameters are used as optimization design variables to obtain the best trapezoidal tooth structure through numerical methods to maximize the motor output torque. After optimization, the torque peak of the torque-maximizing prototype is increased by nearly 25%, which proves the effectiveness of the optimization scheme.

Key words: hybrid stepping motor, motor performance, trapezoidal tooth layer, electromagnetic structure, three-dimensional finite element model, Taguchi optimization, numerical method, torque maximization

CLC Number:

TP273

FANG Lingli,XIAO Longfei,BI Chao. Electromagnetic Structure Optimization of Three-Phase Hybrid Stepping Motor Based on Taguchi Method[J].Electronic Science and Technology, 2021, 34(12): 7-12.

Figures/Tables 15

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References 18

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结构参数	数值
定子极数	12
每极定子上的小齿数	4
转子层数	4
每层转子上的小齿数	50
隔磁材料层数	1
永磁体层数	2
永磁体材料	N35
永磁体厚度	1.4 mm
额定电流	5.8 A
机身长度	76.5 mm
出轴直径	8 mm
出轴长度	21 mm
安装孔距	50 mm
法兰尺寸	60 mm×60 mm
重量	1.3 kg
出轴类型	D

优化因子	具体参量
A	r_t₁/r_λ
B	S_t₁/S_λ
C	r_θ
D	s_θ

序号	结构参数及水平				峰值转矩 /mN·m	信噪比
序号	A	B	C	D	峰值转矩 /mN·m	信噪比
1	1	1	1	1	1 672	64.307
2	1	2	2	2	1 580	63.973
3	1	3	3	3	1 588	64.020
4	2	1	2	3	1 560	63.860
5	2	2	3	1	1 559	63.857
6	2	3	1	2	1 590	64.028
7	3	1	3	2	1 540	63.750
8	3	2	1	3	1 462	63.300
9	3	3	2	1	1 532	63.705

样机	转矩峰值/mN·m
样机	仿真结果	实验结果
原型机	1 447	1 405
转矩峰值最大化样机	1 672	1 755

Electromagnetic Structure Optimization of Three-Phase Hybrid Stepping Motor Based on Taguchi Method

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