Title :
Influence of skew and cross-coupling on d- and q-axis inductances and flux-weakening performance of PM brushless AC machines
Author :
Qi, G. ; Chen, J.T. ; Zhu, Z.Q. ; Howe, D. ; Zhou, L.B. ; Gu, C.L.
Author_Institution :
Dept. of Electr. Machines & Drives, Huazhong Univ. of Sci. & Technol., Wuhan
Abstract :
A method is proposed for predicting the d- and q-axis inductances and flux-weakening performance of PM brushless AC machines accounting for skew and d-q axis cross-coupling. The method is based on a d-q-axis flux-linkage model, a hybrid 2-D FE-analytical method being used to predict the d- and q-axis inductances. However, it only requires 2-D FE analysis of the magnetic field distribution over a cross-section of the machine. The developed method is used to predict the torque-speed characteristic of an interior PM brushless AC machine with one stator slot-pitch skew, which is compared with predictions from a direct FE analysis and validated by measurements.
Keywords :
AC machines; brushless machines; electromagnetic coupling; finite element analysis; magnetic flux; permanent magnet machines; stators; d-axis inductances; d-q axis cross-coupling; flux-linkage model; flux-weakening performance; hybrid 2-D FE-analytical method; interior PM brushless AC machines; magnetic field distribution; q-axis inductances; stator slot-pitch skew; torque-speed characteristics; AC machines; Electromagnetic induction; Electromagnetic measurements; Forging; Iron; Magnetic analysis; Magnetic field measurement; Saturation magnetization; Stators; Torque measurement;
Conference_Titel :
Electrical Machines and Systems, 2008. ICEMS 2008. International Conference on
Conference_Location :
Wuhan
Print_ISBN :
978-1-4244-3826-6
Electronic_ISBN :
978-7-5062-9221-4
