Rotordynamics modelling and analysis of high‐speed permanent magnet electrical machine rotors

2018 ◽  
Vol 12 (8) ◽  
pp. 1104-1109 ◽  
Author(s):  
Ziyuan Huang ◽  
Yun Le
Keyword(s):  
Permanent Magnet ◽  
High Speed ◽  
Electrical Machine

The Strength Analysis of Rotor Sleeve and PM for High-Speed Electrical Machine

2011 ◽  
Vol 338 ◽  
pp. 477-480 ◽  
Author(s):  
Hong Chang Ding ◽  
Lin Jing Xiao
Keyword(s):  
Theoretical Calculation ◽  
Permanent Magnet ◽  
High Speed ◽  
High Strength ◽  
Strength Analysis ◽  
Electrical Machine ◽  
Interference Fit ◽  
Result Show ◽  
High Rotation Speed ◽  
Ansys Workbench

For high-speed permanent magnet (PM) electrical machine, the PM material has very small tensile stress, and it can’t withstand the huge centrifugal force. So, a high-strength sleeve with interference fit is necessary to protect the PM. This paper mainly analyzes the strength of rotor sleeve and PM. It deduces the theoretical calculation method of the strength according to Lame equation, and it also analyzes the stress of sleeve and PM by ANSYS Workbench. The result show that the theoretical calculation value is closely to the ANSYS result, and it can meet the requirements of protecting the permanent magnet in high rotation speed.

Influence of magnets magnetization direction on the performance of high-speed permanent magnet synchronous starter-generator for micro-gas turbine

2020 ◽  
Vol 21 (6) ◽  
Author(s):  
Haiyang Zhao ◽  
Xutian Zou ◽  
Hongbo Qiu ◽  
Yiwei Ding
Keyword(s):  
Finite Element ◽  
Permanent Magnet ◽  
Gas Turbine ◽  
High Speed ◽  
Torque Ripple ◽  
Electrical Machine ◽  
Generation System ◽  
Magnetization Direction ◽  
Micro Gas Turbine ◽  
Comprehensive Performance

AbstractHigh-speed surface-mounted permanent magnet synchronous machine is often used in micro gas turbine generation system due to its high rotor strength and high efficiency. The electrical machine in this kind of generation system needs to integrate two functions of starter and generator. Therefore, its comprehensive performance, including starting performance and generating performance, has become a comprehensive standard to measure machine performance. In this paper, a 40 kW, 20,000 r/min high-speed machine is taken as an example, the influence of magnets magnetization direction on the machine comprehensive performance is studied. The machine models with different magnets magnetization directions are established by using finite element method and the correctness of the models is verified by comparing the experimental data with the finite element calculation data. On this basis, the influence of different magnetization directions on the performance of the machine, such as generation loss, torque ripple, output voltage, start-up time and maximum starting ability, is analyzed. Furthermore, based on the Fourier decomposition of air gap flux density and the decoupling analysis of starting torque, the influence mechanism of magnetization direction on the performance of the machine is revealed. The presented results provide a reference for the selection of a suitable magnetization direction for high-speed surface-mounted permanent magnet machines.

scholarly journals Design And Implementation Of Ls-Pmsg For Small Scale Hydro Power Plant

2018 ◽  
Vol 1 (2) ◽  
Author(s):  
Yusuf Ismail Nakhoda ◽  
Feri Prasetyo Nugroho ◽  
M. Abd. Hamid ◽  
Awan Uji Krismanto ◽  
Eko Yohanes Setiawan
Keyword(s):  
Power Plant ◽  
Permanent Magnet ◽  
Output Voltage ◽  
High Speed ◽  
Synchronous Generator ◽  
Small Scale ◽  
Stable Operation ◽  
Electrical Machine ◽  
Hydro Power ◽  
Low Speed

- In conventional power system, synchronous generator which characterized by high-speed operating condition has been widely implemented. However, those high-speed synchronous machines are not suitable for a power plant powered by renewable energy (RE) due to uncertain feature of renewable resources. To overcome this problem, an electrical machine with low-speed characteristic is required for ensuring stable operation and maintaining output power of the RE based distribution generation (DG) unit. In this paper, a low-speed permanent magnet synchronous generator (LS-PMSG) is designed and implemented. To realize low-speed operation capability, the multi-stages permanent magnet synhcronous machine is proposed. The multi-stages machine equipped with two stators and three rotors construction. From the experimental results, it was monitored that output voltage of single rotor of the designed machine was 35 V. Moreover, to increase the output voltage to 50 V, those three rotors can be connected in series.

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
Sign in / Sign up

Export Citation Format

Share Document