Improved method for field analysis of surface permanent magnet machines using Schwarz-Christoffel transformation

被引：34
作者：
Ramakrishnan, Kesavan [1 ]
Zarko, Damir [2 ]
Hanic, Ana [3 ]
Mastinu, Gianpiero [1 ]
机构：
[1] Politecn Milan, Dept Mech Engn, La Maza 1, I-20156 Milan, Italy
[2] Univ Zagreb, Dept Elect Machines Drives & Automat, Fac Elect Engn & Comp, Unska 3, HR-10000 Zagreb, Croatia
[3] Univ Zagreb, Fac Min Geol & Petr Engn, Pierottijeva 6,PP 390, HR-10000 Zagreb, Croatia
来源：
IET ELECTRIC POWER APPLICATIONS | 2017年 / 11卷 / 06期
关键词：
permanent magnet machines; rotors; finite element analysis; conformal mapping; air gaps; field analysis; surface permanent magnet machines; numerical Schwarz-Christoffel transformation; air gap field solution; PM machine; outer rotor permanent magnet machine; SC transformation; single slot geometry; point wire field analytical solution; rectangular canonical domain; geometrical distortions; field evaluation points; complex relative air gap permeance; air gap flux density waveforms; armature winding; cogging torque; time-stepping transient finite element simulation; DC MOTORS; TORQUE;
D O I：
10.1049/iet-epa.2016.0712
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
Air gap field solution for an outer rotor permanent magnet (PM) machine is derived based on numerical Schwarz-Christoffel (SC) transformation of a single slot geometry and analytical solution of a point wire field in the rectangular canonical domain. This approach takes into account geometrical distortions of PM edges and field evaluation points located along the air gap centre, which occur due to conformal mapping of the slotted air gap into a slotless domain and impair the accuracy of the existing analytical field solutions using SC transformation and complex relative air gap permeance. The increased accuracy of the improved solution is confirmed by comparing the air gap flux density waveforms produced by the PMs and armature winding, cogging torque, and total torque with the results of time-stepping transient finite element simulation.
引用
收藏
页码：1067 / 1075
页数：9
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