永磁体助磁的单相双凸极电机优化设计

doi:10.16180/j.cnki.issn1007-7820.2020.09.001

摘要/Abstract

摘要：

针对永磁体助磁的单相双凸极电机优化设计问题开展了研究,推导出电机理想运行工况下的基本方程,并结合开关磁阻电机的设计原则总结出该电机的设计步骤。文中采用锥形气隙实现电机的自起动,然后利用总结的设计步骤设计了一台额定功率45 W,额定转速2 000 r·min^-1的永磁体助磁的单相双凸极电机。通过仿真计算电机主要结构参数对效率和齿槽转矩的影响并归纳出其规律性,为电机优化提供了参考。文中讨论了锥形气隙比率与电机起动能力的关系,并利用田口实验设计方法对电机进行了优化。优化后电机效率为89.86%,相比优化前提高了4.46%,证明了电机设计及优化的有效性。

关键词: 永磁体助磁的单相双凸极电机, 优化设计, 性能分析, 田口法, 锥形气隙, 齿槽转矩

Abstract:

In this paper, the optimization design of permanent-magnet-assisted single-phase doubly salient motor is studied. The basic equations for the ideal operating condition of the motor are derived, and the design step of the motor are summarized by referring to the design principle of the switched reluctance motor.Self-starting of the motor is achieved by using a tapered air gap. A permanent-magnet-assisted single-phase doubly salient motor with power rating of 45 W and rated speed of 2 000 r·min^-1 is designed by using the summarized design step. The influence of the main structural parameters of the motor on the efficiency and cogging torque is calculated by simulation, and its regularity is summarized, which provids a reference for motor optimization. The relationship between the ratio of the tapered air gap and the starting ability of the motor is discussed, and the motor is optimized by Taguchi experimental design method. The optimized motor efficiency is 89.86%, which is 4.46% higher than that before optimization, vorifying the effectiveness of motor design and optimization.

Key words: permanent-magnet-assisted single-phase doubly salient motor, optimized design, performance analysis, Taguchi method, tapered airgap, cogging torque

中图分类号:

TN787

上官璇峰,马亚涛,王双平,胡刚强,李飞祥. 永磁体助磁的单相双凸极电机优化设计[J]. 电子科技, 2020, 33(9): 1-9.

SHANGGUAN Xuanfeng,MA Yatao,WANG Shuangping,HU Gangqiang,LI Feixiang. Optimal Designing of Permanent-magnet-assisted Single-phase Doubly Salient Motor[J]. Electronic Science and Technology, 2020, 33(9): 1-9.

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参数	数值
额定功率/ W	45
额定转速/ r·min^-1	2 000
定子极数	2
转子极数	4
定子极弧/(°)	90
转子极弧/(°)	45

参数	数值
定子外径/mm	84.00
定子内径/mm	42.00
轴向长度/mm	21.00
第一气隙/mm	0.40~0.60
第二气隙/mm	9.20
隔磁槽宽度/mm	4.00
转子轭部高度/mm	7.00
转轴直径/mm	10.00
气隙比率	1.50
定子左右轭部宽度/mm	12.00
定子上下轭部高度/mm	8.00
永磁体高度/mm	4.80
永磁体宽度/mm	39.00

参数	a	b/(°)	c/mm	d/mm
水平1	1.5	30	4.0	5.1
水平2	1.7	35	4.5	5.4
水平3	-	40	5.0	5.7

实验次数	a	b	c	d	效率/%
1	1.5	30	4.0	5.1	89.01
2	1.5	30	4.5	5.4	89.79
3	1.5	30	5.0	5.7	89.57
4	1.5	35	4.0	5.1	89.17
5	1.5	35	4.5	5.4	89.44
6	1.5	35	5.0	5.7	89.76
7	1.5	40	4.0	5.4	89.51
8	1.5	40	4.5	5.7	89.86
9	1.5	40	5.0	5.1	89.82
10	1.7	30	4.0	5.7	89.26
11	1.7	30	4.5	5.1	89.47
12	1.7	30	5.0	5.4	89.21
13	1.7	35	4.0	5.4	89.53
14	1.7	35	4.5	5.7	89.76
15	1.7	35	5.0	5.1	89.48
16	1.7	40	4.0	5.7	89.33
17	1.7	40	4.5	5.1	89.19
18	1.7	40	5.0	5.4	89.27

参数	水平	效率/%
气隙比率	水平1	89.55
气隙比率	水平2	89.39
转子极弧	水平1	89.39
	水平2	89.52
	水平3	89.50
隔磁槽宽度	水平1	89.30
	水平2	89.58
	水平3	89.52
永磁体磁化高度	水平1	89.36
	水平2	89.46
	水平3	89.59