Design and Strength Analysis of Ultra-High Speed Permanent Magnet DC Rotor

2011 ◽  
Vol 188 ◽  
pp. 481-486 ◽  
Author(s):  
J.C. Xiao ◽  
S.H. Xiao ◽  
H. Wu
Keyword(s):  
Finite Element ◽  
Centrifugal Force ◽  
High Speed ◽  
Rotational Velocity ◽  
Contact Theory ◽  
Strength Analysis ◽  
Interference Fit ◽  
Rotating Speed ◽  
Shrink Fitting ◽  
Nonmagnetic Steel

The sintered neodymium-iron-boron (Nd-Fe-B) material is used in most of PM machines. The kind of PM materials has small tensile strength and cannot withstand large centrifugal force due to high rotational velocity. A nonmagnetic steel enclosure is needed to cover the PM material. The tensile stress of the PM can reduced by pre-pressure applied to the outer surface of the PM through shrink-fitting into the enclosure. Based on the elasticity theory and the elastic-plastic contact theory, in soft ANSYS it is feasibility to establish a finite element mechanical model of interference fit between the enclosure and motor rotor PM at high rotating speed. This paper simulates the effects of the temperature and rotating speed (centrifugal force) on the displacement and the contact pressure on the interference-fitting surfaces .By finite element non-linear contact model analysis, if setting up right fit clearance, this paper could ensure the security of the PM rotor under rotational velocity up to 300,000 r/min high and temperature up to 150°C.

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.

Strength Analysis of Energy Storage Flywheel Wrapped with Composite Material

2013 ◽  
Vol 577-578 ◽  
pp. 105-108
Author(s):  
Hong Li ◽  
Yi Meng Pang ◽  
Fang Fang Xu ◽  
Li Li
Keyword(s):  
Composite Material ◽  
Energy Storage ◽  
Power Systems ◽  
High Speed ◽  
Strength Analysis ◽  
Flywheel Energy Storage ◽  
Element Analysis ◽  
Rotating Speed ◽  
Energy Storage Efficiency ◽  
Design And Manufacture

The technology of flywheel energy storage is already widely used in motorcar, electric power systems, spaceflight and martial fields. Decreasing the weight, increasing rotating speed and strength of the flywheel rotor and improving the energy storage efficiency of the flywheel are always attention-getting. In this paper, the flywheel energy storage wrapped with composite material by interference fit to hub is designed and finite element analysis is done to obtain the stress distribution of it before being produced. The maximum and variety of stress are studied and the influence of composite material wrapped on flywheel rotating at a high speed is discussed. Then the action of composite material preload to the flywheel is thought about. The results of this analysis can prepare a valuable guide for flywheel energy storage at design and manufacture stage.

Modal Analysis of BT Spindle-Toolholder Interface Based on Abaqus/Standard

2013 ◽  
Vol 662 ◽  
pp. 632-636
Author(s):  
Yong Sheng Zhao ◽  
Jing Yang ◽  
Xiao Lei Song ◽  
Zi Jun Qi
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Modal Analysis ◽  
Dynamic Characteristics ◽  
High Speed ◽  
Element Model ◽  
Contact Theory ◽  
High Speed Machining ◽  
The Finite Element Model

The quality of high speed machining is directly related to dynamic characteristics of spindle-toolholder interface. The paper established normal and tangential interactions of BT spindle-toolholder interface based on finite element contact theory, and analysed free modal in Abaqus/Standard. Then the result was compared with the experimental modal analysis. It shows that the finite element model is effective and could be applied in the future dynamic study of high-speed spindle system.

scholarly journals The Influence of Centrifugal Force on the Interference Fit of High-Speed Electric Spindle

2020 ◽  
Vol 08 (04) ◽  
pp. 792-799
Author(s):  
Chao Ding ◽  
Xiangyang Qi ◽  
Zhen Gao ◽  
Lei Chang
Keyword(s):  
Centrifugal Force ◽  
High Speed ◽  
Interference Fit

The Finite Element Analysis of Rotor Contact Strength for a High-Speed Traction Motor

2012 ◽  
Vol 503-504 ◽  
pp. 876-879 ◽  
Author(s):  
Hui Yu Xiang ◽  
De Mao Hu ◽  
Chong Jie Leng ◽  
Yan Jue Gong
Keyword(s):  
Finite Element ◽  
High Speed ◽  
Short Circuit ◽  
Strength Analysis ◽  
Contact Strength ◽  
Element Analysis ◽  
Traction Motor ◽  
Speed Test ◽  
Efficiency Increase ◽  
Starting Conditions

In order to evaluate the contact strength of a type of high-speed train traction motor rotor，in this paper, for the high speed test train traction motor under the five working conditions, Based on the established motor rotor 3D model, NX.Nastran environment, the contact pressure between rotor and lamination is analyzed by the finite element and got the stress intensity distribution on the rotor. The five working condition include starting, constant work starting condition, rated, short circuit condition, the highest speed condition. The result shows that for the high speed tractor motor, in the starting conditions, and won't appear rotor shaft and laminated relation between slip. The finite element method is useful to do the contact strength analysis, and thus to improve the design efficiency, increase the reliability of the product, and lay the foundation for the latter design optimization.

Stress Analysis of Interference Fit in Wheelset

2014 ◽  
Vol 926-930 ◽  
pp. 873-876
Author(s):  
Min Zhang ◽  
Guang Zhong Hu ◽  
Shou Ne Xiao ◽  
Yong Ming Tang
Keyword(s):  
Finite Element ◽  
Stress Analysis ◽  
Axial Force ◽  
Contact Stress ◽  
Contact Area ◽  
High Speed ◽  
Main Role ◽  
Load Case ◽  
Total Stress ◽  
Interference Fit

The locomotive wheelset running with a high-speed, the wheels and axles of wheelset usually assembled by interference fit, the radial contact stress produced by interference cause the friction on the contact area, the axial force and torque of the wheelset transmitted by the friction. The value of prestress produced by the magnitude of interference change small in each load case, and it plays the main role in total stress of wheelset. So it’s very important that choosing a appropriate interference for the wheelset assembly base on the results solved by the finite element contact analysis.

scholarly journals Parametric Study of the Centrifugal Insurance Mechanism in MEMS Safety and Arming Device

2017 ◽  
Author(s):  
Dakui Wang ◽  
Wenzhong Lou ◽  
Yue Feng ◽  
Fufu Wang
Keyword(s):  
Finite Element ◽  
Centrifugal Force ◽  
Parametric Study ◽  
Nonlinear Dynamic ◽  
Dynamic Method ◽  
Finite Element Models ◽  
Fem Model ◽  
Electromechanical Systems ◽  
Rotating Speed ◽  
Insurance Mechanism

MEMS (Micro-electromechanical Systems) becomes important increasingly due to the smarter and smaller fuze used in OICW (Objective Individual Combat Weapon). MEMS Safety and Arming (S&A) device is employed in different platforms and regions for small caliber projectile. Therefore, it is necessary to make a parametric study of the MEMS S&A device in different apply environments and explore the main sensitive factors of the MEMS S&A device to provide reference for designs. In this paper, based on the MEMS S&A device designed by our term, theory and finite element models are established, and the centrifugal insurance mechanism of the MEMS S&A device is parametric studied under the different speeds, temperature and thickness of the model by nonlinear dynamic method. By comparing the experimental and predicted results, the established FEM model is verified, and the conclusion is that the temperature and the centrifugal force are the main sensitive factors in the centrifugal insurance mechanism. In summary, we can suggest that the application environment, which the MEMS S&A device is suitable for, is the temperature equal to or slightly greater than normal temperature and the rotating speed higher than35000r/min of small caliber projectile.

Electromagnetic torque and strength analysis of combination rotor in high speed PMSM

2020 ◽  
Vol 64 (1-4) ◽  
pp. 1019-1027
Author(s):  
Hao Lin ◽  
Haipeng Geng ◽  
Lie Yu ◽  
Hao Li ◽  
Sheng Feng ◽  
...  
Keyword(s):  
Finite Element ◽  
High Speed ◽  
Permanent Magnet Synchronous Motor ◽  
Three Dimensional ◽  
Analytical Calculation ◽  
Element Model ◽  
Strength Analysis ◽  
Electromagnetic Torque ◽  
Foil Bearings ◽  
Three Dimensional Finite Element

For a high-speed permanent magnet synchronous motor supported by air foil bearings, analyzing the influence of the electromagnetic torque on the strength of the combination rotor was necessary. In this study, the electromagnetic torque was obtained using the analytical calculation and the finite element simulation. The contact interface stress analytical equation affected by the electromagnetic torque was elaborated. A three-dimensional finite element model simulating the combination rotor was constructed, and the stress calculations were performed. The strength of the combination rotor met the design requirement. It properly reflected the characteristics of the electromechanical analysis in the combination rotor. The operation experiments were realized to verify the electromagnetic performance and the strength of the combination rotor. The simulation and experimental results were significant for the electromechanical design and analysis of the combination rotor.

Study on Radial Deformation of CBN Grinding Wheel Considering Centrifugal Force and Grinding Heat

2013 ◽  
Vol 797 ◽  
pp. 500-504
Author(s):  
Xue Zhi Wang ◽  
Wan Shan Wang ◽  
Tian Biao Yu ◽  
Na Yuan ◽  
Xue Sun
Keyword(s):  
Finite Element ◽  
Centrifugal Force ◽  
High Speed ◽  
Grinding Force ◽  
Grinding Wheel ◽  
Machining Accuracy ◽  
Radial Deformation ◽  
Element Analysis ◽  
Grinding Speed ◽  
Cbn Grinding Wheel

For ultra-high-speed grinding, the deformation of grinding wheel has a greater impact on the machining accuracy. Finite element method was used to study the radial deformation of the CBN grinding wheel considering centrifugal force and grinding heat. The study shows that the effects of centrifugal force and grinding heat are same magnitude, and the proportion changes with the change of grinding speed and grinding force. By finite element analysis, it is possible to solve the grinding wheel the radial deformation and grinding temperature under different grinding speed and grinding force, and it also provides theoretical support for predicting the machining accuracy, compensating precision and avoiding grinding burn.

Analysis of Step Interference Fit of the High Speed Motorized Spindle with Finite Element Method

2004 ◽  
Vol 471-472 ◽  
pp. 844-849 ◽  
Author(s):  
Ping Ma ◽  
Cheng Xiang Liao ◽  
M.L. Duan ◽  
J.K. Li ◽  
D.N. Li ◽  
...  
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
High Speed ◽  
Three Dimensional ◽  
Internal Surface ◽  
Three Dimensional Model ◽  
Motorized Spindle ◽  
Interference Fit ◽  
Balance Accuracy ◽  
Element Method

Balance for high speed motorized spindle is most important, it will influence the dynamic behavior of the high speed machine tools. In this paper, the GD-IV high speed spindle is introduced. In order to improve its balance accuracy, the step interference fit is developed to connect the rotor and the shaft. The interference fitted assembly has been modeled theoretically, the analysis highlights that the tolerance of the interference fit consists of the static section and dynamic section, the static section is determined by the transmitting torque while the dynamic section is determined by the centrifugal force. The Calculation of interference fit for the GD-IV spindle shows that the dynamic section is about 4.5 times larger than the static. Furthermore, the three dimensional model of the step interference fit between the shaft and the rotor has also been built up with finite element method and the stress distribution on the mating surface has been calculated. The results show that the maximum stress occurring near the chamfer region of the internal surface of the rotor is up to 235 MPa lower than the permissible material stress 278 MPa, so that the design of the step interference fit is reliability and safety.

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