TY - JOUR
T1 - Influence of rotor endcaps on the electromagnetic performance of high-speed PM machine
AU - Al-Timimy, Ahmed
AU - Al-Ani, Mahir
AU - Degano, Michele
AU - Giangrande, Paolo
AU - Gerada, Chris
AU - Galea, Michael
N1 - Publisher Copyright:
© The Institution of Engineering and Technology 2018.
PY - 2018/9/1
Y1 - 2018/9/1
N2 - Surface-mounted permanent magnet (SPM) machines are preferred for high-speed aerospace applications over induction and switched reluctance machines, since they combine the advantages of high torque density and efficiency. Also, in aerospace applications, where low rotor weight and inertia are essential requirements, a permeable hollow shaft is proposed to replace the need for rotor back-iron and reduce the overall rotor weight. For rotor mechanical integrity, a retaining sleeve is commonly used, leading to thicker magnetic airgap. Furthermore, when permeable rotor endcaps are applied, an increase of the magnetic end leakage occurs, i.e. end-effect. In this study, the influence of the rotor endcaps on the mechanical and electromagnetic performance of a high-speed SPM machine is investigated through 3D-finite element analyses. Also, different endcap thickness and different rotor shaft materials are investigated and compared in this work. Finally, a prototype of the SPM machine under study has been manufactured and tested. The comparison between simulation and experimental results is presented and discussed.
AB - Surface-mounted permanent magnet (SPM) machines are preferred for high-speed aerospace applications over induction and switched reluctance machines, since they combine the advantages of high torque density and efficiency. Also, in aerospace applications, where low rotor weight and inertia are essential requirements, a permeable hollow shaft is proposed to replace the need for rotor back-iron and reduce the overall rotor weight. For rotor mechanical integrity, a retaining sleeve is commonly used, leading to thicker magnetic airgap. Furthermore, when permeable rotor endcaps are applied, an increase of the magnetic end leakage occurs, i.e. end-effect. In this study, the influence of the rotor endcaps on the mechanical and electromagnetic performance of a high-speed SPM machine is investigated through 3D-finite element analyses. Also, different endcap thickness and different rotor shaft materials are investigated and compared in this work. Finally, a prototype of the SPM machine under study has been manufactured and tested. The comparison between simulation and experimental results is presented and discussed.
UR - http://www.scopus.com/inward/record.url?scp=85052524078&partnerID=8YFLogxK
U2 - 10.1049/iet-epa.2017.0811
DO - 10.1049/iet-epa.2017.0811
M3 - Article
AN - SCOPUS:85052524078
SN - 1751-8660
VL - 12
SP - 1142
EP - 1149
JO - IET Electric Power Applications
JF - IET Electric Power Applications
IS - 8
ER -