scholarly journals Magneto-structural simulation of an induction motor start-up using nodal magnetic forces in Elmer

2017 ◽  
Vol 50 (3) ◽  
pp. 296-299
Author(s):  
Janne Keränen ◽  
Pavel Ponomarev ◽  
Sabin Sathyan ◽  
Juhani Kataja ◽  
Anouar Belahcen
Keyword(s):  
Finite Element ◽  
Open Source ◽  
Induction Motor ◽  
Magnetic Force ◽  
Electrical Machines ◽  
Finite Element Software ◽  
Magnetic Forces ◽  
Structural Simulation ◽  
Start Up

For reduction of vibrations and noise of electrical machines, the computation of the magnetic force distributions and the ensuing deformations are needed. Here we utilize nodalforce method in open-source Finite Element software Elmer to compute the force distributions and the vibrations of an induction motor during start-up.

scholarly journals New elements within finite element modeling of magnetostriction phenomenon in BLDC motor

Open Physics ◽  
2020 ◽  
Vol 18 (1) ◽  
pp. 459-466
Author(s):  
Podhajecki Jerzy ◽  
Rawicki Stanislaw
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Numerical Model ◽  
Finite Element Modeling ◽  
Mechanical Model ◽  
Electrical Machines ◽  
Bldc Motor ◽  
Factors Affecting ◽  
Element Modeling ◽  
Magnetic Forces

AbstractReluctance forces are the main cause of vibration in electrical machines. The influence of magnetostriction is still the matter of controversy. In the article, program Ansys (typical for finite element method) was used to analyze stator deformation due to magnetic forces (Maxwell and magnetostriction) for the different boundaries and different methods by taking into account the windings in the mechanical model. Different parameters of numerical model are important factors affecting the level of magnetostriction deformation.

Critical Long Bone Defect Treated by Magnetic Scaffolds and Fixed by Permanent Magnets

2013 ◽  
Author(s):  
Alessandro Russo ◽  
Silvia Panseri ◽  
Tatiana Shelyakova ◽  
Monica Sandri ◽  
Chiara Dionigi ◽  
...  
Keyword(s):  
Finite Element ◽  
Magnetic Nanoparticles ◽  
Bone Tissue ◽  
Bone Defect ◽  
Long Bone ◽  
Bone Scaffold ◽  
Finite Element Software ◽  
Magnetic Forces ◽  
Long Bone Defect

Diaphyseal bone defect represents a significant problem for orthopaedic surgeons and patients. In order to improve and fasten bone regenerating process we implanted HA biodegradable magnetized scaffolds in a large animal model critical bone defect. A critical long bone defect was created in 6 sheep metatarsus diaphysis; then we implanted a novel porous ceramic composite scaffold (20.0 mm in length; 6.00 mm inner diameter and 17.00 mm outer diameter), made of Hydroxyapatite that incorporates magnetite (HA/Mgn 90/10), proximally fixated by two small cylindrical permanent parylene coated NdFeB magnets (one 6.00 mm diameter magnetic rod firmly incorporated into the scaffold and one 8.00 mm diameter magnetic rods fitted into proximal medullary canal, both 10.00 mm long); to give stability to the complex bone-scaffold-bone, screws and plate was used as a bridge. Scaffolds biocompatibility was previously assessed in vitro using human osteoblast-like cells. Magnetic forces through scaffold were calculated by finite element software (COMSOL Multiphysics, AC/DC Model). One week after surgery, magnetic nanoparticles functionalized with vascular endothelial growth factor (VEGF) were injected at the mid portion of the scaffold using a cutaneous marker positioned during surgery as reference point. After sixteen weeks, sheep were sacrificed to analyze metatarsi. Macroscopical, radiological and microCT examinations were performed. Macroscopical examination shows bone tissue formation inside scaffold pores and with complete coverage of scaffolds, in particular at magnetized bone-scaffold interface. X-rays show a good integration of the scaffold with a good healing process of critical bone defect, and without scaffolds mobilization. These datas were confirmed by the microCT that shown new formation of bone inside the scaffolds, in particular at magnetized bone-scaffold interface. These preliminary results lead our research to exploiting magnetic forces to stimulate bone formation, as attested in both in vitro and in vivo models and to improve fixation at bone scaffold interface, as calculated by finite element software, and moreover to guide targeted drug delivery without functionalized magnetic nanoparticles dissemination in all body. Histological analysis will be performed to confirm and quantify bone tissue regeneration at both interfaces.

scholarly journals Shell finite elements, with emphasis on strategies used within Elmer software

2017 ◽  
Vol 50 (3) ◽  
pp. 162-165
Author(s):  
Mika Malinen
Keyword(s):  
Finite Element ◽  
Finite Elements ◽  
Open Source ◽  
Finite Element Discretization ◽  
Element Discretization ◽  
Finite Element Software ◽  
Structural Shell

The best way to handle finite element discretization of structural shell equationsis still a subject of discussion. This article presents some viewpoints and reviews innovationswhich have recently been taken into use in connection with the implementation of new shell finite elements into the open source finite element software Elmer.

Research on Temperature Field of Variable Frequency Motor

2013 ◽  
Vol 273 ◽  
pp. 355-359
Author(s):  
Yao Hui Wu ◽  
Xiao Mei Liu ◽  
Xiu Feng Meng ◽  
Hong Tu Zhao
Keyword(s):  
Finite Element ◽  
Temperature Field ◽  
Induction Motor ◽  
Temperature Rise ◽  
Experimental Tests ◽  
Transient Temperature ◽  
Variable Frequency ◽  
Element Analysis ◽  
Finite Element Software ◽  
Frequency Power

To the problem of small induction motor that supplied by Variable frequency power temperature rise, according to the basic theory of heat transfer and using finite element analysis software, in the paper, it established a motor of two-dimensional transient temperature field model ,though the equivalent simplify of the structure and thermal conductivity, and the compare between the simulation of finite element software studies and the temperature experimental tests , It confirms the affect that variable frequency power on the motor temperature rise, and finds a simplified simulation of motor temperature field and parameters equivalent approach which do provide effective help to the design and use of the induction motor.

scholarly journals PRISMS-Plasticity: An open-source crystal plasticity finite element software

2019 ◽  
Vol 169 ◽  
pp. 109078 ◽  
Author(s):  
Mohammadreza Yaghoobi ◽  
Sriram Ganesan ◽  
Srihari Sundar ◽  
Aaditya Lakshmanan ◽  
Shiva Rudraraju ◽  
...  
Keyword(s):  
Finite Element ◽  
Open Source ◽  
Crystal Plasticity ◽  
Crystal Plasticity Finite Element ◽  
Finite Element Software
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