scholarly journals Systematic design study into the influence of rotational speed on the torque density of surface-mounted permanent magnet machines

2019 ◽  
Vol 2019 (17) ◽  
pp. 4595-4600
Author(s):  
Anshan Yu ◽  
Geraint W. Jewell
Keyword(s):  
Permanent Magnet ◽  
Rotational Speed ◽  
Permanent Magnet Machines ◽  
Systematic Design ◽  
Design Study ◽  
Torque Density

scholarly journals Design studies of inner and outer embedded Permanent Magnet for hybrid electric vehicles

2018 ◽  
Vol 159 ◽  
pp. 02003
Author(s):  
Aravind CV ◽  
Ramani Kannan ◽  
Heng Jing Lei ◽  
Joga Dharma Setiawan
Keyword(s):  
Performance Analysis ◽  
Permanent Magnet ◽  
Numerical Study ◽  
Permanent Magnet Machines ◽  
Flux Flow ◽  
Torque Density ◽  
Wide Range ◽  
Interior Permanent Magnet ◽  
High Torque ◽  
Hybrid Electric

Hybrid vehicles require high torque for propel, hence permanent Magnet machines are highly suiting for the improvement in the torque density. The paper focus on designing built-in interior permanent magnet (IPM) synchronous machine for hybrid electric drive. With the permanent magnet switched from rotor to stator and the characteristics over a wide range of speed operation is studied. The results obtained though performance analysis shows that at 130 rpm high torque with power peaking at around 900 rpm. Both the inner and outer machine are studied using numerical study tool for performance analysis for the application mentioned above. The inner magnet rotor design has provide a better magnetic flux flow due to the larger flux linkage between the permanent magnet and stator pole. Both type of machines are evaluated for torque where the machine with inner magnet provide a higher torque density of 4.94% as compared to the outer magnet machines.

scholarly journals Reducing Torque Ripples of the Axial Flux PM Motors by Magnet Stepping and Shifting

2018 ◽  
Vol 8 (1) ◽  
pp. 2385-2388
Author(s):  
E. Cetin ◽  
F. Daldaban
Keyword(s):  
Permanent Magnet ◽  
Electromotive Force ◽  
Torque Ripple ◽  
Electric Machines ◽  
Permanent Magnet Machines ◽  
Axial Flux ◽  
Element Analysis ◽  
Torque Density ◽  
Research Goal ◽  
Torque Ripples

Higher efficiency on electric machines is the research goal of many studies. An example is the axial flux permanent magnet machines. These machines have some advantages like their watt/kg efficiency and torque density. This study aims to develop the performance characteristics of the axial flux permanent magnet machines. A new rotor magnet poles design in axial flux machines is suggested to mitigate the torque ripples. The method of stepping and shifting of the magnets is used. Two different designs are compared to verify the proposed approach. 3D finite element analysis is used for simulations. Torque ripple and back electromotive force waveforms are obtained from computer analysis. As a conclusion, the suggested method is found to be useable and mitigates the torque ripples. In addition to that, back EMF waveforms are turned to sinusoidal by the suggested design.

scholarly journals Electromagnetic Performance of the Novel Hybrid-Pole Permanent Magnet Machines for High Peak Torque Density

IEEE Access ◽  
2020 ◽  
Vol 8 ◽  
pp. 220384-220393
Author(s):  
Yu-Xi Liu ◽  
Ji-Wei Cao ◽  
Qin-He Gao ◽  
Zhi-Hao Liu ◽  
Ya-Chao Lu ◽  
...  
Keyword(s):  
Permanent Magnet ◽  
Peak Torque ◽  
High Peak ◽  
Permanent Magnet Machines ◽  
The Novel ◽  
Torque Density ◽  
Electromagnetic Performance
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