The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Based on the traditional method which only considered inertia force and boundary contact force upon PM motor'rotor, this paper calculates the complex coupling effects of electromagnetic force and the mentioned force by three-dimensional finite-element analyzing, gets more accurate result of 3D stress distribution of the rotor under the electromagnetic-structural coupling effects, brings new ideas...
Effects of retention groove location and dimensions of threaded glass fiber post on the maximum retention force of the restorative system and the maximum equivalent stress in the root were numerically investigated. Results show that the retention groove can effectively enhance retention ability and reduce the stress in the root. And the maximum retention force of the restorative system can be increased...
The rubber track wheel conversion that the new design has some disadvantages, such as short life of the rubber track, the heavier quality, stronger vibrates and running deviation and f-wheel. This article in carries on the analysis to the rubber track wheel conversion structure composition and the performance merit, elaborated the rubber track wheel conversion the question as well as the solution...
This paper presents a new identification method for the biomechanical parameters of human tissues for the purpose of improving the accuracy of dynamic organ simulation. We describe the formulation of the method, and also design a robotic system to implement the method using a robotic probe, a medical imaging device, and a numerical simulator for the finite element analysis (FEA). We carried out an...
Since the number of trans-femoral amputees has increased by industrial or traffic accidents in modern society, a prosthetic limb has been required. In this case, those amputees must regain moving pattern by efficient gait training using load conditions on a prosthetic limb as quantitative evaluation indices. However, conventional gait training systems cannot measure long continuous walking motions...
In order to eliminate the friction force of linear motor numerical control machine tool feed system, a new Magnetic Suspension Permanent Magnet Linear Synchronous Motor(PMLSM)is putted forward in this paper, which can generate the suspending power by itself and it is different from electromagnet suspension system. The virtual work method is presented for the electromagnetic force computation of linear...
A linear in form of a mechanical clutch system for the transmission of the force produced by a piezoelectric stack to a shaft is presented. Following an Inchworm motion principle, avoiding wear and giving an accurate positioning, this motor should generate high linear forces up to 1500 N on infinite strokes. The force and displacement values given by the FEM simulations of the piezoelectric stacks...
The Axial-Flux Solid Aluminum Rotor Induction Motor (AFAIM), which is Electro-dynamic System [1–2], is presented in this paper. The system creates electromagnetic field by 3-phase alternating current in primary winds, induct eddy field in secondary and create lift and thrust force. This paper establishes a 2-D sub-loop electro-magnetic model, studies the dynamic characteristic of the maglev, gets...
The recent progress in soft magnetic composite (SMC) material has made it an alternative for motor armature core material to silicon steel. The manufacturing process of armature core made of SMC can be greatly simplified by extrusion moulding. Moreover, the isotropic characteristic of SMC enables more flexible structure designs for electric machines compared with the 2D flux distribution of traditional...
The gap between the rotor and the stator of the external circulation piston pump has an important impact on pump efficiency and operation reLiabiLity. Shaft and rotor are important parts of the external circulation piston pump. The gap value is determined by the shaft flexural deformation. According to the force of the rotor and shaft, the relevant module of the software ANSYS was appLied to give...
In order to assure the dimensional quaLity of compLiant sheet metal assembly, it is quite necessary to use the numerical method to simulate and analyze the assembly process before real assembly. In this paper, the finite element analysis of the whole compLiant sheet metal assembly process is reaLized in two steps: clamping force calculation and joining and springing back simulation. Clamping force...
This thesis compares the advantages and disadvantages of the Tunnel Actuator and those of the existing linear motors. Then, an optimum design method for performance improvement was proposed, and an optimal design to maximize the thrust of the tunnel actuator was made by using 3D finite elements method and response surface method.
An improved structure of air-core tubular linear generator with double side halbach permanent magnets was proposed. With changed arrangement of the permanent magnets, this proposed generator can provide bigger electromotive force (EMF) and higher efficiency than the reported one with same dimensions. Using finite element method (FEM), electromagnetic field and performances of the generator were analyzed...
This paper deals with finding the optimal ratio of height and length of Single-Sided Linear Induction Motors (SLIM) using Finite Element Method (FEM) for magnetic field analysis coupled with optimal design methodology. For effective analysis, FEM is conducted in time harmonic field which provides steady state performance with the fundamental components of voltage and current. The ratio of height to...
In this paper, take the 150kW radial laminated magnetic-barrier rotor brushless doubly-fed machine as an example, the unit area radial force of its rotor has been calculated theoretically by the winding method, the comparison of radial forces of different rotor pole-pair (odd and even) have been realized by theoretical calculation and FEM simulation calculation that based on Ansoft software, two operations...
This paper estabLishes a finite element model of grinding wheel and the stress analysis is carried out under idLing, normal, and abnormal conditions separately. On idLing condition, the tangential stress is the main failure factors of grinding wheel by the effects of centrifugal force. The stress distribution of grinding wheel on normal conditon is consistent with the abnomal condition's. When working...
An analytical method of dynamic vibration response for the surface mount permanent magnet brushless motors was proposed. It is based on the modal superposition method and Love's thin shell theory. The analytical solution explicitly explained the relationship between the radial force, the natural frequency, the mode shape and the vibration. It offered a simple approach to avoid the potential vibration...
The normal force characteristics of single-sided linear induction motor is analyzed using multilayer theory and finite element method (FEM). It is found that the magnetic permeability of back iron affects the analysis results obviously. In this article the equivalent magnetic energy method is used to correct the permeability of back iron in multi-layer approach. As the simulated object, the normal...
The 3D finite element technique has been used to calculate transient electromagnetic fields and forces due to negative sequence currents in large synchronous turbogenerator rotors. The paper is devoted to the finite element analysis of electromagnetic forces in the joints of nonmagnetic slot wedges along the rotor length. Force distributions in the time and frequency domains are obtained. The results...
The use of Numerical Control and computers in manufacturing has enabled the development of new sheet forming processes. One of these flexible processes is called Incremental Sheet Forming (ISF) in which deformation is localized by the movement of a spherical or flat forming tool. ISF is carried out regularly by a CNC machine tool or by a Robot, which follows a tool-path generated by CAM programs,...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.