Simulation of Generator with Moving Mesh

2012 ◽  
Vol 522 ◽  
pp. 891-894
Author(s):  
Lu Yang ◽  
Ming Li Sun ◽  
Liang Dao Tang ◽  
Guang Ming Cheng
Keyword(s):  
Permanent Magnets ◽  
Rotation Velocity ◽  
Circular Motion ◽  
Moving Mesh ◽  
Comsol Multiphysics ◽  
Stator Winding ◽  
Material Parameters

This paper shows how the circular motion of a rotor with permanent magnets generates an induced EMF in a stator winding. The generated voltage is calculated with moving mesh in COMSOL Multiphysics as a function of time during the rotation. The model also shows the influence on the voltage from material parameters, rotation velocity, and number of turns in the winding.

scholarly journals The Use of the Bilateral Levitation of Transport Pods Relatively to the Arch Trestle

2019 ◽  
Vol 5 (2) ◽  
pp. 83-91
Author(s):  
Evgeny Yu. Sundukov ◽  
Nadezhda A. Tarabukina
Keyword(s):  
Magnetic Field ◽  
Transport System ◽  
Permanent Magnets ◽  
Stator Winding ◽  
Patent Search ◽  
Bilateral Movement

Background: The arch trestle allows using two working surfaces: internal (under the arch) and external (over the arch) which may be used for moving of the transport pods. Transport pods include magnetic field sources, and the trestle is equipped with a stator winding. The stator winding is subdivided into the accelerating winding and suspension and levitation winding. As an option, the winding providing levitation can be replaced with permanent magnets. Aim: to show capacities of the arch trestle for transportation of passengers and goods. Methods: patent search, modeling. Results: simultaneous transportation of goods and passengers is possible both in the same and opposite directions. Conclusion: the efficiency of the transport system increases due to bilateral movement of modules.

Study of an aluminium mixing system based on permanent magnets

2020 ◽  
Vol 39 (1) ◽  
pp. 192-197
Author(s):  
Andrey Morev ◽  
Alexander Aliferov
Keyword(s):  
Magnetic Field ◽  
Permanent Magnets ◽  
Rotation Velocity ◽  
Rotating Magnetic Field ◽  
The Finite Element Method ◽  
Ansys Software ◽  
Angular Rotation ◽  
Content Type ◽  
Maximum Value ◽  
The Magnetic Field

Purpose The purpose of this paper is to investigate the effect of the rotating magnetic field of permanent magnets on the aluminium melt bath. Design/methodology/approach This model was developed in the ANSYS software package and is based on the application of the finite element method and finite volume. Findings The distribution of the velocity of the melt in a cylindrical vertical bath and the dependence of the maximum value of the melt displacement on the angular rotation velocity of the system of permanent magnets is obtained. Originality/value This work focusses on the interaction of the magnetic field of the moving magnets with the molten metal.

Simulation Analysis of Fluid-Structure Interactions with Moving Mesh

2011 ◽  
Vol 305 ◽  
pp. 235-238 ◽  
Author(s):  
Ming Li Sun ◽  
De Wu ◽  
Ming Qiang Wang ◽  
Sheng Fei Jin ◽  
Kan Zhi Wang
Keyword(s):  
Fluid Flow ◽  
Simulation Analysis ◽  
Moving Boundaries ◽  
Moving Mesh ◽  
Comsol Multiphysics ◽  
Moving Grid ◽  
Arbitrary Lagrangian Eulerian ◽  
Fluid Structure Interactions ◽  
Fluid Structure ◽  
Deforming Geometry

This paper demonstrates techniques for modeling fluid-structure interactions with moving mesh in COMSOL Multiphysics. It illustrates how fluid flow can deform surrounding structures and how to solve for the flow in a continuously deforming geometry using the arbitrary Lagrangian-Eulerian (ALE) technique. The ALE method handles the dynamics of the deforming geometry and the moving boundaries with a moving grid.

DESIGN OF THE N-SIDED REGULAR POLYGONAL TRANSPARENT DEVICE USING METAMATERIALS

2012 ◽  
Vol 26 (30) ◽  
pp. 1250162 ◽  
Author(s):  
JING-JING YANG ◽  
MING HUANG ◽  
SHU-JUAN MU ◽  
SAI CHENG ◽  
MENG WANG ◽  
...  
Keyword(s):  
Finite Element ◽  
Coordinate Transformation ◽  
Transformation Method ◽  
Cylindrical Wave ◽  
Comsol Multiphysics ◽  
Material Parameters ◽  
Full Wave ◽  
Field Distributions ◽  
Coordinate Transformation Method ◽  
Incident Waves

Based on the coordinate transformation method, we derived the material parameters for arbitrary N-sided regular polygonal transparent device, which is an important device for antenna protection. The electric field distributions of the device under TE wave and cylindrical wave irradiation are simulated using the finite element solver COMSOL Multiphysics. It shows that although the incident waves are distorted in the transformation region, they return to the original wavefronts when passing through the transformation region. The results of full-wave simulations validate the material parameters for the N-sided regular polygonal transparent device we derived.

scholarly journals Electric Machines with Non-Radially Mounted Rectangular Permanent Magnets / Elektriskās Mašīnas Ar Prizmatiskiem Neradiāli Novietotiem Pastāvīgajiem Magnētiem

2013 ◽  
Vol 50 (2) ◽  
pp. 15-22
Author(s):  
N. Levin ◽  
V. Pugachev ◽  
J. Dirba ◽  
L. Lavrinovicha
Keyword(s):  
Permanent Magnets ◽  
Lower Cost ◽  
Electric Machines ◽  
Electric Machine ◽  
Specific Power ◽  
Stator Winding ◽  
Advantages And Disadvantages

The authors analyze the advantages and disadvantages of brushless synchronous electric machines with radially and non-radially mounted rectangular permanent magnets. The results show that the proposed nonradial mounting of permanent magnets considered in the paper, in several cases (e.g. multi-pole brushless generators with tooth windings of the armature) allows achievement of the following advantages: better technology of manufacturing the electric machine owing to simple packing of the stator winding in the stator open slots, which also increases the copper slot fillfactor; reduction in the mass-and-size of permanent magnets at least twice; significantly lower cost of the electric machine; and, finally, its greater specific power.

scholarly journals STARTING UP AND REGULATING THE ROTATIONAL SPEED OF A POWERFUL ELECTRIC DRIVE USING A MAGNETIC REDUCING GEAR

2020 ◽  
pp. 16-23
Author(s):  
Alexander A. Afanasyev
Keyword(s):  
Electric Motor ◽  
Permanent Magnets ◽  
Frequency Converter ◽  
Input Voltage ◽  
Magnetic Core ◽  
Stator Winding ◽  
State Equations ◽  
Current Frequency ◽  
Reducing Gear ◽  
Load Mode

The article examines a magnetic reducing gear, the stator winding of which receives power in the mode of a valve machine. In the absence of this supply, the electric motor can be started-up in no-load mode. To significantly reduce the power of the magnetic reducing gear frequency converter compared to the power of the adjustable electric motor, it is necessary to make the number of the rotor's pairs of poles with permanent magnets of a magnetic reducing gear large enough. In this case, the design of arranging the magnets in radial grooves is the most adequate, ensuring the concentration of fluxes per pole in the air gaps. The stator winding of such a magnetic reducing gear will be low-pole. When manufacturing a magnetic reducing gear, it is possible to use a stator magnetic core of a serial asynchronous machine together with its regular winding. The electromagnetic moments of the magnetic gearbox rotors are a consequence of the presence of a stator electromagnetic moment. The stator's current frequency is represented by two components, of which the first is defined from the state equations and the second is a constant forming an additional channel of functional influence. The speed of rotation of the gear shafts can be adjusted by changing the specified constant and the input voltage of the frequency converter. The equations of the magnetic reducer state describing its functional modes were solved by means of the Mathcad mathematical program.

MAIN CHARACTERISTICS ELECTRIC VIBRATORS BASED ON A LINEAR MOTOR WITH PERMANENT MAGNETS

2021 ◽  
Vol 4 (3) ◽  
pp. 4-10
Author(s):  
Kamoliddin Oqyolov ◽  
◽  
Nurzod Abduqodirov ◽  
Gulnoza Jalilova ◽  
Nuriddin Abduxakimov
Keyword(s):  
Magnetic Field ◽  
Permanent Magnets ◽  
Experimental Studies ◽  
Calculated Data ◽  
Linear Motor ◽  
Stator Winding ◽  
The Finite Element Method ◽  
Magnetic Forces ◽  
Electro Magnetic ◽  
The Magnetic Field

The design of an electric vibrator created on the basis of a linear motor with permanent magnets is considered, and the calculation of the magnetic field and the electromagnetic force acting on the motor armature is performed by the finite element method. The results of experimental studies confirming the reliability of the obtained calculated data are presented]. The purpose of this work is to study the distribution of the magnetic field and the electro-magnetic forces in a coaxial-linear permanent magnet electric motor (PM), which is the basis for the creation of avibration installationKeywords: vibration, magnets, magnetic induction, stator winding, electric vibrator

Cylindrical Thermal Cloak Based on the Path Design of Heat Flux

2015 ◽  
Vol 137 (2) ◽  
Author(s):  
Linzhi Wu
Keyword(s):  
Heat Flux ◽  
Thermal Protection ◽  
Transient Behavior ◽  
Large Degree ◽  
Comsol Multiphysics ◽  
Material Parameters ◽  
Path Design ◽  
Transient Thermal ◽  
Blue Print ◽  
Dynamic Diffusion

When heat flux flows in a given medium, its path will solely be determined. This implies that material parameters determined by the predesigned path of heat flux will guide heat to flow along the designed path. Based on this idea, we develop a new method for the design of the cylindrical thermal cloak which can make heat flux detour the cloaked object. For the inhomogeneous anisotropic medium, we derive the relation between the path trajectory of heat flux and material parameters and obtain two differential equations and one boundary condition which are used to determine material parameters in the cylindrical cloak. The transient behavior on the flow of heat flux is simulated by Comsol Multiphysics and the transient thermal protection of the cylindrical cloak for the cloaked object is examined. The effect of the product of density and specific heat on the dynamic diffusion process of heat flux is analyzed. Since one can flexibly design the path of heat flux in the cloak, it has the large degree of freedom to construct thermal cloaks with the specific distributions of material parameters. The present method provides a new blue print for the transient thermal protection of a specific target.

scholarly journals Simulation of pressure-induced cavity deformation – the 18SIB04 Quantumpascal EMPIR project

ACTA IMEKO ◽  
2020 ◽  
Vol 9 (5) ◽  
pp. 281
Author(s):  
J. Zakrisson ◽  
I. Silander ◽  
C. Forssén ◽  
Z. Silvestri ◽  
D. Mari ◽  
...  
Keyword(s):  
Comsol Multiphysics ◽  
Material Parameters ◽  
Fabry Perot ◽  
Primary Standards ◽  
Ansys Workbench

The 18SIB04 QuantumPascal EMPIR project aims for development of photon-based standards that can replace primary standards of the SI unit of pressure, the Pascal. In this project, four partners simulated the pressure-induced deformation of a given Fabry-Pérot cavity, using various versions of two types of software, COMSOL Multiphysics (R) and ANSYS Workbench. It was demonstrated that, for a given geometry and set of material parameters, simulations of the deformation could be performed by the various partners with such small discrepancies that methodological mistakes of the simulation procedures will solely contribute to a sub-ppm uncertainty in the assessments of refractivity of N<sub>2</sub>.

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