电动汽车用双层永磁体IPMSM解析与优化设计

doi:10.19562/j.chinasae.qcgc.2021.08.002

Abstract

Abstract:

In order to accurately and quickly obtain the air?gap flux density waveform， the equivalent magnetic circuit method is used to analyze and calculate the air?gap magnetic field of the inter permanent magnet synchronous machine （IPMSM） with a double?layer permanent magnet structure. Considering the influence of the stator slotting effect， the air?gap length is corrected by the improved Carter coefficient. To reduce waveform total harmonics distortions （THD） of air?gap magnetic flux density and torque ripple， a Taguchi method is introduced for multi?objective fast optimization design analysis for the motor cores. The multivariable and multi?objective optimization design process of IPMSM with a double?layer permanent magnet structure is described using finite element simulation analysis and numerical calculation. The analysis shows that the output torque of the optimized double?layer IPMSM is improved by 2%， the torque ripple is reduced by 2.77%， the no?load air?gap magnetic density harmonic distortion rate is reduced by 4.28%. The experiments of the prototype have verified the reliability of the finite element and the validity of the theoretical analysis.

Key words: permanent magnet synchronous machine, air?gap magnetic field, multi?objective optimization, Taguchi method, prototype experiment

Xiping Liu,Jiesheng Fu,Longxin Du,Gaosheng Zhu Wenjian Guo. Analysis and Optimization Design of IPMSM with a Double⁃layer Permanent Magnet Structure of Electric Vehicles[J].Automotive Engineering, 2021, 43(8): 1128-1135.

Figures/Tables 22

参数	$B s 0$ /mm	$O 2$ /mm	$R i b$ /mm
水平1	1.6	40	9
水平2	2.0	42	11
水平3	2.4	44	13
水平4	2.8	46	15

实验数量	实验矩阵编码	$T a$ /（N?m）	$T r$ /%	空载气隙磁密THD/%
1	111	424.413 9	8.81	24.20
2	122	431.614 7	6.89	18.44
3	133	438.207 5	6.74	18.68
4	144	441.859 0	6.16	20.43
5	212	428.302 2	7.82	19.52
6	221	428.027 4	8.02	19.91
7	234	440.367 3	6.96	20.80
8	243	439.609 3	5.99	19.93
9	313	431.865 5	7.40	21.04
10	324	437.482 5	6.93	21.83
11	331	430.322 4	8.29	21.14
12	342	435.261 6	7.01	21.10
13	414	433.917 4	7.42	23.51
14	423	434.261 7	6.86	22.36
15	432	432.587 8	7.29	22.20
16	441	431.738 5	8.76	23.13

参数	$T a ? ˉ$ /（N·m）	$T r ? ˉ$ /%
平均值	433.74	7.35

参数	$B s 0$ /mm		$O 2$ /mm		$R i b$ /mm
参数	$T a m$	$T k r$	$T a m$	$T k r$	$T a m$	$T k r$
水平1	434.0	7.23	429.6	7.86	428.6	8.47
水平2	434.1	7.20	432.8	7.20	431.9	7.25
水平3	433.7	7.40	435.4	7.32	436.0	6.75
水平4	433.1	7.58	437.1	7.04	438.4	6.90

参数	$T a$		$T r$
参数	SS	FF/%	SS	FF/%
$B s 0$	2.404 8	0.673	0.369 2	4.02
$O 2$	128.273 6	35.91	1.518 4	16.51
$R i b$	226.513 6	63.42	7.307 6	79.47

参数	数值	参数	数值
额定功率/kW	70	额定电压/V	380
峰值转矩/（N·m）	430	定子外径/mm	300
额定转矩/（N·m）	220	定子内径/mm	192
额定转速/（r·min^-1）	3 000	联接方式	Y
气隙长度/mm	1	矫顽力/（kA·m^-1）	915
每槽导体数	10	剩磁/T	1.266
$w m 1$ /mm	13.9	$α / (o)$	16
$h m 1$ /mm	3.1	$β / (o)$	18
$w m 2$ /mm	30.3	$γ / (o)$	33
$h m 2$ /mm	4	$δ / (o)$	37
$a 1$ /mm	0.8	$a 2$ /mm	0.8

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Analysis and Optimization Design of IPMSM with a Double⁃layer Permanent Magnet Structure of Electric Vehicles

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