Tooth shape optimization of brushless permanent magnet motors for reducing torque ripples

2004 ◽  
Vol 282 ◽  
pp. 193-197 ◽  
Author(s):  
Liang-Yi Hsu ◽  
Mi-Ching Tsai
Keyword(s):  
Shape Optimization ◽  
Permanent Magnet ◽  
Permanent Magnet Motors ◽  
Tooth Shape ◽  
Torque Ripples

scholarly journals Prediction of Torque Pulsations in Brushless Permanent-Magnet Motors Using Improved Analytical Technique

2010 ◽  
Vol 61 (1) ◽  
pp. 37-43 ◽  
Author(s):  
Arash Kiyoumarsi
Keyword(s):  
Permanent Magnet ◽  
Analytical Method ◽  
Open Circuit ◽  
Permanent Magnet Motors ◽  
Analytical Technique ◽  
Design And Optimization ◽  
Brushless Motor ◽  
Torque Pulsations ◽  
Torque Ripples ◽  
Flux Density Distribution

Prediction of Torque Pulsations in Brushless Permanent-Magnet Motors Using Improved Analytical TechniqueTorque pulsations have prominent effects on the performance of brushless permanent- magnet (PM) machines. There are different sources of torque ripples in PM motors. These torque pulsations depend on the shape of the flux density distribution in the airgap region. For predicting the open-circuit airgap field distribution in brushless PM motors, a two dimensional (2-D) analytical method, in which the direction of magnetization, either radial or parallel and the effect of the stator slot-openings are taken into account, is used. The method uses an improved 2-D permeance model. In order to evaluate the accuracy of this method, a 2-D time-stepping FEM coupled with the two motion equations is used. A 3-phase, 36-slot, 4-pole, 5 HP, brushless PM motor is modeled by two methods. In this analysis both, the radial and parallel magnetization of the brushless motor are considered. The results obtained by the analytical method are compared with those obtained by FE analysis that shows the valuable accuracy of the analytical method for performance calculations in design and optimization processes.

Development of Interior Permanent Magnet Motors with Concentrated Windings for Reducing Magnet Eddy Current Loss

2009 ◽  
Vol 129 (11) ◽  
pp. 1022-1029 ◽  
Author(s):  
Katsumi Yamazaki ◽  
Yuji Kanou ◽  
Yu Fukushima ◽  
Shunji Ohki ◽  
Akira Nezu ◽  
...  
Keyword(s):  
Permanent Magnet ◽  
Eddy Current ◽  
Eddy Current Loss ◽  
Permanent Magnet Motors ◽  
Current Loss ◽  
Interior Permanent Magnet
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