scholarly journals Comparative Analysis of Parallel Hybrid Magnet Memory Machines with Different PM Arrangements

2021 ◽  
Vol 12 (4) ◽  
pp. 177
Author(s):  
Yixian Wang ◽  
Hui Yang ◽  
Hao Zheng ◽  
Heyun Lin ◽  
Shukang Lyu
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Comparative Analysis ◽  
Permanent Magnet ◽  
Magnetic Circuit ◽  
The Finite Element Method ◽  
Hybrid Magnet ◽  
Parallel Hybrid ◽  
Electromagnetic Characteristics ◽  
Magnetic Barriers

This paper presents a comparative analysis of two parallel hybrid magnet memory machines (PHMMMs) with different permanent magnet (PM) arrangements. The proposed machines are both geometrically characterized by a parallel U-shaped hybrid PM configuration and several q-axis magnetic barriers. The configurations and operating principles of the investigated machines are introduced firstly. The effect of magnet arrangements on the performance of the proposed machines is then evaluated with a simplified magnetic circuit model. Furthermore, the electromagnetic characteristics of the proposed machines are investigated and compared by the finite-element method (FEM). The experiments on one prototype are carried out to validate the FEM results.

scholarly journals Reluctance Network Model of a Permanent Magnet Tubular Motor

2017 ◽  
Vol 11 (3) ◽  
pp. 194-198 ◽  
Author(s):  
Andrzej Waindok ◽  
Bronisław Tomczuk
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Permanent Magnet ◽  
Network Model ◽  
Magnetic Circuit ◽  
Calculation Model ◽  
Air Gap ◽  
The Finite Element Method ◽  
Reluctance Network ◽  
Analytical Expressions

Abstract The reluctance network model of a permanent magnet tubular motor (PMTM) has been presented in the paper. The reluctance values of the magnetic circuit have been calculated with using analytical expressions. The air gap reluctance has been determined with using both analytical expressions and the finite element method (FEM). Using the calculation model, the flux values coupled with the windings have been obtained and used in the calculations of force value. The calculated results have been compared with numerical and measured ones.

scholarly journals Static force characteristics of electromagnetic actuators for Braille screen

2011 ◽  
Vol 24 (2) ◽  
pp. 157-167 ◽  
Author(s):  
Ivan Yatchev ◽  
Krastio Hinov ◽  
Iosko Balabozov ◽  
Kristina Krasteva
Keyword(s):  
Magnetic Field ◽  
Finite Element Method ◽  
Finite Element ◽  
Permanent Magnet ◽  
Static Force ◽  
The Finite Element Method ◽  
Electromagnetic Actuators ◽  
Minimum Force ◽  
The Magnetic Field ◽  
Force Characteristics

Several constructions of electromagnetic actuators with moving permanent magnet for Braille screen are studied. All they are formed from a basic one that consists of two coils, core and moving permanent magnet. The finite element method is used for modeling of the magnetic field and for obtaining the electromagnetic force acting on the mover. The static force-stroke characteristics are obtained for four different constructions of the actuator. The constructions with ferromagnetic disc between the coils ensure greater force than the ones without disc and can reach the required minimum force.

scholarly journals COMPARATIVE ANALYSIS OF MONOCORTICAL AND BICORTICAL METHODS OF INSTALLING MINI-IMPLANTS

2021 ◽  
pp. 38-40
Author(s):  
O.Yu. Rivis ◽  
V.S. Melnyk ◽  
M.V. Rivis ◽  
K.V. Zombor
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Comparative Analysis ◽  
Cortical Bone ◽  
Bone Tissue ◽  
Orthodontic Treatment ◽  
The Finite Element Method ◽  
Force Load ◽  
Mini Implants ◽  
Element Method

The aim of the study. Carry out a comparative analysis of the support ability of human jaw bone tissue in monocortical and bicortical installation of a mini-implant of own design OMG. Research methods. In order to study biomechanical characteristics of developed OMG mini-implant and bone tissue capacity during monocortical and bicortical installation, the finite element method (MSE) was used. The scheme and finite element 2-D model of bicortical installation of OMG mini-implant (length 8 mm, diameter 1.8 mm) provided full penetration through one layer of cortical bone equal to 1 mm, the entire cancellous bone and immersion in the second layer of cortical bone by 0, 5 mm. No implantation was immersed in the second cortical layer of bone during monocortical installation. A single force load of 1 N was applied in the horizontal direction parallel to the cortical plate of the bone. Results of the study. One of the most important factors leading to the success of the use of a mini-implant is its stability in the process of orthodontic treatment. Quite a high level of failure in the monocortical installation of mini-screws has led to the search for better methods to ensure the stability of their use. This was a bicortical method of fixation, based on the placement of the minig screw in the thickness of the two cortical plates of the jaws. Area for such installation of mini-screws can be a site of a palate and alveolar sprouts at installation of miniimplants through all its thickness. As shown by our data on the use of the finite element method under the force load of the biomechanical system "bone - mini-implant", the stress concentration zone is located in the area of the cortical bone of the jaw. The results of the calculation of the maximum stresses (σmax, MPa) and the maximum possible displacements (umax, mm) of the mini-implant in the biomechanical system "bone - mini-implant" in monocortical installation were, respectively, 8.27 MPa and 0.300 * 10-8 mm and in bicortical installation 6.00 MPa and 0.201 * 10-8 mm. The bicortical method of fixing the mini-implant in the jaw bones significantly increases the ability to resist deformation of this type of biomechanical system under force loads of the mini-implant. In the bicortical method of mini-implant placement, the extreme values of equivalent according to Mises stresses in the upper part of the cortical bone of the jaw are reduced by 27%. This can be explained by a significant increase in the area of contact due to the two layers of the cortical bone of the jaw with the surface of the mini-implant. Conclusion. The bicortical method of installing mini-implants is a more effective and reliable way to provide skeletal support during orthodontic treatment.

FEM-Based Lifting Permanent Magnetic Chuck Design

2013 ◽  
Vol 655-657 ◽  
pp. 355-358 ◽  
Author(s):  
Ning Ding ◽  
Yu Mei Song ◽  
Lina Wang ◽  
Ding Tong Zhang ◽  
Li Gong Ding
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Permanent Magnet ◽  
Circuit Design ◽  
Magnetic Circuit ◽  
Saving Energy ◽  
Driving System ◽  
Working Principle ◽  
Optimal Saving ◽  
Element Method

The optimal saving energy permanent magnet lifting chuck has been designed. Working principle of this technology is introduced. Magnetic circuit design is carried out by finite element method (FEM). At the same time, a perfect self-acting driving system has been invented for picking and releasing loads fast and conveniently without using any electricity at all. Industry prototype was manufactured, and it verified that the proposed lifting permanent magnetic chuck was feasible.

scholarly journals A Novel Interior Permanent Magnet Machine with Magnet Axis Shifted Effect for Electric Vehicle Applications

2021 ◽  
Vol 12 (4) ◽  
pp. 189
Author(s):  
Yongsheng Ge ◽  
Hui Yang ◽  
Weijia Wang ◽  
Heyun Lin ◽  
Ya Li
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Permanent Magnet ◽  
Basic Principle ◽  
Design Parameters ◽  
Asymmetry Ratio ◽  
Interior Permanent Magnet ◽  
Ipm Machine ◽  
Electromagnetic Characteristics ◽  
Magnet Axis

This paper proposes a novel interior permanent magnet (IPM) machine with asymmetrical PM configuration. Different from the traditional IPM counterparts, the proposed machine can perform a magnet axis shifted (MAS) effect. The magnet axis is shifted towards the reluctance axis so that a higher resultant torque capability can be obtained. Firstly, the configuration and the basic principle of the proposed machine are described. The design parameters are optimized to improve the torque capability, and the effect of the PM asymmetry ratio on the torque performance is then evaluated in detail. In addition, the major electromagnetic characteristics of the optimized machine are investigated and compared with those of the Prius 2010 IPM machine by finite element method (FEM). The results demonstrate that the proposed asymmetrical PM configuration can achieve the torque improvement due to the MAS effect.

scholarly journals Modeling and research of the process of preparing the surface of a part for thermal spray coating

2020 ◽  
Vol 329 ◽  
pp. 03052
Author(s):  
Aleksandr Novikov ◽  
Aleksei Rodishev ◽  
Andrei Gorin ◽  
Maria Tokmakova
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Comparative Analysis ◽  
Field Experiment ◽  
Adhesive Strength ◽  
Spray Coating ◽  
Thermal Spray Coating ◽  
The Finite Element Method ◽  
Antifriction Coating ◽  
Rolling Method

The article presents an analysis of ways to increase the adhesive strength of antifriction coating. A rational method for the mechanical formation of surfaces is proposed. The calculation of the workpiece based on the finite element method has been carried out. The theoretical dependences of metal lifting on the depth of the rolling roller are obtained. The results of a field experiment are presented. A comparative analysis of theoretical and practical results of the research has been carried out. Recommendations are given for the further use of the net rolling method with a pre-cut “ragged thread”.

Analysis of permanent magnet linear motor parameters taking its heating into account

2012 ◽  
Vol 61 (4) ◽  
pp. 471-482 ◽  
Author(s):  
Andrzej Waindok
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Permanent Magnet ◽  
Thermal Field ◽  
Permanent Magnets ◽  
Static Field ◽  
Temperature Fields ◽  
The Finite Element Method ◽  
Calculation Results ◽  
Permanent Magnet Linear Motor

Abstract The calculation results of the static field parameters for permanent magnet linear synchronous motor have been presented in this work. The influence of the construction temperature on the parameters has been analyzed mathematically. Models for magnetic and temperature fields determination have been formulated. Two kinds of permanent magnets (NdFeB and SmCo) have been considered. The distribution of the thermal field has been obtained using the finite element method (FEM).

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