Design and Optimization of Multi-ring Permanent Magnet Bearings for High-speed rotors- A Computational Framework

2021 ◽  
Author(s):  
Raghavendra Kamath C ◽  
◽  
Ritesh Bhat ◽  
Siddappa I. Bekinal ◽  
Vijay G. S. ◽  
...  
Keyword(s):  
Permanent Magnet ◽  
High Speed ◽  
Computational Framework ◽  
Design And Optimization

scholarly journals Design and Optimization of a High-Speed Switched Reluctance Motor

Energies ◽  
2021 ◽  
Vol 14 (20) ◽  
pp. 6733
Author(s):  
Stefan Kocan ◽  
Pavol Rafajdus ◽  
Ronald Bastovansky ◽  
Richard Lenhard ◽  
Michal Stano
Keyword(s):  
Permanent Magnet ◽  
Output Power ◽  
High Speed ◽  
Permanent Magnet Synchronous Motor ◽  
Switched Reluctance Motor ◽  
Torque Ripple ◽  
Synchronous Motor ◽  
Switched Reluctance ◽  
Design And Optimization ◽  
Reluctance Motor

Currently, one of the most used motor types for high-speed applications is the permanent-magnet synchronous motor. However, this type of machine has high costs and rare earth elements are needed for its production. For these reasons, permanent-magnet-free alternatives are being sought. An overview of high-speed electrical machines has shown that the switched reluctance motor is a possible alternative. This paper deals with design and optimization of this motor, which should achieve the same output power as the existing high-speed permanent-magnet synchronous motor while maintaining the same motor volume. The paper presents the initial design of the motor and the procedure for analyses performed using analytical and finite element methods. During the electromagnetic analysis, the influence of motor geometric parameters on parameters such as: maximum current, average torque, torque ripple, output power, and losses was analyzed. The analysis of windage losses was performed by analytical calculation. Based on the results, it was necessary to create a cylindrical rotor shape. The rotor modification method was chosen based on mechanical analysis. Using thermal analysis, the design was modified to meet thermal limits. The result of the work was a design that met all requirements and limits.

Performance analysis of magnetic gear with Halbach array for high power and high speed

2020 ◽  
Vol 64 (1-4) ◽  
pp. 959-967
Author(s):  
Se-Yeong Kim ◽  
Tae-Woo Lee ◽  
Yon-Do Chun ◽  
Do-Kwan Hong
Keyword(s):  
Permanent Magnet ◽  
Eddy Current ◽  
High Power ◽  
High Speed ◽  
Torque Ripple ◽  
Eddy Current Loss ◽  
Element Analysis ◽  
Current Loss ◽  
Halbach Array ◽  
Magnetic Gear

In this study, we propose a non-contact 80 kW, 60,000 rpm coaxial magnetic gear (CMG) model for high speed and high power applications. Two models with the same power but different radial and axial sizes were optimized using response surface methodology. Both models employed a Halbach array to increase torque. Also, an edge fillet was applied to the radial magnetized permanent magnet to reduce torque ripple, and an axial gap was applied to the permanent magnet with a radial gap to reduce eddy current loss. The models were analyzed using 2-D and 3-D finite element analysis. The torque, torque ripple and eddy current loss were compared in both models according to the materials used, including Sm2Co17, NdFeBs (N42SH, N48SH). Also, the structural stability of the pole piece structure was investigated by forced vibration analysis. Critical speed results from rotordynamics analysis are also presented.

High-Speed Permanent-Magnet Generator with Controlled Magnetic Flux for Aerospace Application

2019 ◽  
Vol 12 (6) ◽  
pp. 290 ◽  
Author(s):  
Viacheslav Vavilov ◽  
Luca Papini ◽  
Flyur Ismagilov ◽  
Shoujun Song ◽  
Valentina Ayguzina
Keyword(s):  
Magnetic Flux ◽  
Permanent Magnet ◽  
High Speed ◽  
Aerospace Application ◽  
Permanent Magnet Generator
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