考慮定子軸向偏移的YASA軸向磁通電機解析方法

打開文本圖片集

DOI：10.15938/j. emc.2025.04.007

中圖分類號：TM315 文獻標(biāo)志碼：A 文章編號：1007-449X（2025）04-0065-08

Analytical method of YASA axial flux machine considering axial stator offset

SHU Xindong1，2，YI Feng1，2，Z ZHANG Hui1，2 ， ZHANG Chi 1，2 CHEN Silu1，2， CHEN Jinhua1，2

（1.Ningbo Instituteof Materials Technologyand Engineering，Chinese Academyof Sciences，Ningbo 315201，China; . KeyLaboratoryofRoboticsand Inteligent Manufacturing EquipmentTechnologyof ZhejangProvince，Ningbo315201，China）

Abstract ：In yokeless and segmented armature （YASA） axial flux permanent magnet machines，the stator may be axially shifted due to the manufacture and assembly，leading to vibration noise of the machine. An analytical method considering the axial stator ofset was proposed to calculate the no-load magnetic field air gap for the YASA machine. The YASA machine was transformed into a series of 2-D models with varying radii by employing a quasi-3-D approach. Subsequently， the accurate subdomain method was used to divide the YASA machine into five subdomains in Cartesian coordinates，which can effectively consider the effects of stator axial offset and stator slot depth on the air-gap magnetic field distribution.

Harmonic coefficients of each subdomain are solved based on boundary conditions，yielding the distribution of no-load air gap magnetic flux density，back electromotive force （back-EMF），and cogging torque. The calculation results were compared with finite element analysis（FEA），which shows a good agreement between the analytical method and FEA.Furthermore，it can be concluded that the variation of back-EMF and cogging torque can be almost neglected when the axial stator offset is less than 25% . Finally，the YASA machine was fabricated and experiments were carried out to further validate efectiveness of the proposed analytical method.

Keywords：axial flux permanent magnet machine; analytical model; offset; yokeless and segmented armature

0引言

軸向磁通永磁電機具有高轉(zhuǎn)矩密度、高效率和結(jié)構(gòu)緊湊等優(yōu)點，廣泛應(yīng)用于電動汽車、風(fēng)力發(fā)電和飛輪儲能等場合[1-2]。（剩余8993字）