Modified Winding Function Analytical Analysis Method Based on Segmentation of Both Coil and Air Gap Distributions

doi:10.11985/2023.04.008

Abstract

Abstract:

Variable reluctance resolvers(VVRs) have been widely used as position sensors in harsh working conditions because of their advantages in high temperature resistance, insensitity to mechanical vibration, simple structure and so on. In previous work, a hybrid dual-stator machine with an inner-stator VRR radially integrated in a permanent magnet synchronous machine(PMSM) is proposed. The magnetic field distribution and the electromagnetic parameters of the internal machine are analyzed via the modified winding function approach(MWFA). However, the calculated distribution of air gap flux density differed from the finite element analysis(FEA) result at the slot opening. To solve this problem, the segmented winding function method(SWFM) is proposed, where both the air gap length and the coil distribution function are segmented considering the actual distributions of magnetic field and coils so that to achieve more precise analytical approach. With the proposed method, the air gap flux density and the self-inductance of the excitation winding are calculated, and the analytical results of both the SWFM and the MWFA are compared with FEA to verify the accuracy of the proposed method.

Key words: Air gap flux density, modified winding function approach, self-inductance of the excitation winding, variable reluctance resolver, segmented winding function method

CLC Number:

TM351

NI Ronggang, CAI Yaqian, HAN Siyu, ZHAO Yong. Modified Winding Function Analytical Analysis Method Based on Segmentation of Both Coil and Air Gap Distributions[J]. Journal of Electrical Engineering, 2023, 18(4): 66-73.

Figures/Tables 11

References 33

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参数	数值
定子槽数Z	8
定子绕组极对数p_w	2
励磁绕组最大线圈匝数N_exc	8
正弦绕组最大线圈匝数N_sin	16
余弦绕组最大线圈匝数N_cos	16
定子外半径R_so/mm	25
气隙长度最大值g_max/mm	2.4
气隙长度最小值g_min/mm	0.6
定子轴向长度L_ef/mm	100

参数	数值	参数	数值
B_s/mm	10	B_s0/mm	3
H_s0/mm	1	α_s/(°)	63
H_s1/mm	1.78	L_s1/mm	3.927
H_s2/mm	2.92	L_s2/mm	1.683