Comsol Coil

Several different approaches to optimizing a ten-turn axisymmetric coil are presented. Note that you can choose the unit of measurements for the loop diameter and wire diameter. Comsol coil Comsol coil. Simulate real-world designs, devices, and processes with the COMSOL Multiphysics® software. Due to the voltage difference, a current will flow through the wire. I've tried playing around with other parameters such as increasing current and number of coil turns, but didn't see much effect. simulation magnetic field for coils with comsol. Get an introduction to modeling electromagnetic coils in 3D using COMSOL Multiphysics ® and the AC/DC Module. • Install 2 temperature sensor in the coil • Run the coil in vacuum for about 3 hours. 2a with Matlab: 0: 0. The magnetic flux lines (left) and induced currents (right) for a coil group arrangement. One of the common uses of COMSOL Multiphysics with the AC/DC Module and Heat Transfer Module is for modeling inductive heating, the process by which a coil is used to heat up a workpiece over time. Electromagnetic Heating in Coils. 6, to be released in fall 2020, brings faster and more memory-efficient solvers, better CAD assembly. Application ID: 6126. The Single-Turn Coil feature is used to model the coil arrangement in a DC state. In COMSOL Multiphysics version 4. Comsol coil Comsol coil. 1 Introduction Usually the inductance of toroidal coils is calculated either analytically or empirically, on the base of the manufacturer-provided data. This is replaced in the current version by a Single-Turn Coil domain node with the Coil Group check box selected. project for wire plotting of membrane speakers. If you were working at a peak value of H of 100 A m-1, for example, then you might take an average value for μ of about 0. The first coil has N1 turns and carries a current I1 which gives rise to a magnetic field B1 G. Multiphysics Modeling Using COMSOL® rapidly introduces the senior level undergraduate, graduate or professional scientist or engineer to the art and science of computerized modeling for physical systems and devices. × Warning Your internet explorer is in compatibility mode and may not be displaying the website correctly. Sensors that measure voltage in medium-voltage scenarios use resistive voltage dividers, while capacitive dividers, on the other hand, are used for voltage. Optimizing Coils. Helmholtz coils are used by scientists to generate uniform magnetic fields to study electromagnetism and its characteristics. 2000-02-01. For example, a 2 milli-Henry high-frequency coil will have an impedance of 2512 ohms at a frequency of 200 kilohertz. coil, this one is assumed as a medium having an uniform vector current density J0 (Figure 3). This mutual inductance is true irrespective of the size, number of turns, relative position or orientation of the two coils. Likewise, the flux linking coil one, L 1 when a current flows around coil two, L 2 is exactly the same as the flux linking coil two when the same current flows around coil one above, then the mutual inductance of coil one with respect of coil two is defined as M 21. As we all are pretty new with COMSOL, we wonder if you you could give us a hint how to start with. by Walter Frei. Transformer and Inductor modeling with Comsol Multiphysics. Ted Baker(テッドベーカー)のショルダーバッグ「AMAYI べっ甲風ハンドル ストロー バケットバッグ」(251530146)を. A Helmholtz coil is a parallel pair of identical circular coils spaced one radius apart and wound so that the current flows through both coils in the same direction. I have been asked several times how did I generated the Coil in FEMLAB. The facts is that many PCB design tools can't export ODB (X)++. First, the current in each turn is adjusted with the objective of having a uniform magnetic flux density along the centerline. COMSOL, COMSOL Desktop, COMSOL Multiphysics, and LiveLink are registered trademarks or trade- Coil Domains 72 About the Single-Turn Coil Domain, Multi-Turn Coil. I am trying to follow the Helmholtz Coil example in the model library for a rectangular coil form. other field simulation in COMSOL Multiphysics • Elastic shear and pressure waves • Perfectly matched layers (PMLs) for elastic and piezo waves • Thermoelastic effects • 2D or 3D modeling • Retrieve Impedance, Admittance, Current, Electric Field, Voltage, Stress-strain, Electric Energy Density, Strain Energy Density. The magnetic flux lines (left) and induced currents (right) for a coil group arrangement. All coils are a homogenised multi-group, if that matters. 6, to be released in fall 2020, brings faster and more memory-efficient solvers, better CAD assembly. Get an introduction to modeling electromagnetic coils using COMSOL Multiphysics ® and the add-on AC/DC Module. comsol 製品について comsol multiphysics ® ソフトウェアでは工学アプリケーションや物理現象の違いに関わらず, いつも同じユーザーインターフェースとユーザー体験をえられます. As you can see in the model attached, (COMSOL 4. 95 Calculating Lumped Parameters Using the Energy Method. In the Comsol software, i used 2D "magnetic field physics" (mf) and "multi-turn Coil". MRI Birdcage Coil. This introductory tutorial model demonstrates how to find the fundamental resonance frequency of an RF coil as well as how to perform a frequency sweep to extract the coil's Q-factor. Switch branch/tag. In this work, the 3-dimensional magnetic field distribution of this hybrid coil is simulated using COMSOL Multiphysics. I'm a student, new to Comsol, and I'm trying to simulate a copper coil with a current of 100A, at 50Hz, and an Iron/Aluminum screen to see how it shields the electromagnetic field. Hi everybody, I've tried to design a spiral coil in COMSOL but the model did not work because of the wrong port excitation. RF coils are important in numerous applications ranging from wireless technology to MRI scanning equipment. The COMSOL discussion forum covers a wide variety of simulation topics. ZERO BIAS - scores, article reviews, protocol conditions and more. Send Private Message Flag post as spam. Application ID: 124. For a given coil radius, you can calculate the separation needed to give the most uniform central field. We will also discuss the different approaches for use in the low-frequency, mid-frequency, and high-frequency regimes, as well as meshing and solving. In the frequency domain, Ampère's law as solved in Comsol reads (3) (i ω σ − ω 2 ϵ 0 ϵ r) A + ∇ × H = J e where ω is the angular frequency, i = − 1 and ϵ 0 and ϵ r are the electrical permittivity of free space and the. The combination of COMSOL ® products required to model your application depends on several factors and may include boundary conditions, material properties, physics interfaces, and part libraries. The experimental setup consists of four identical in-plane electromagnetic coils and one out-of-plane electromagnetic coil which is used to induce a stick-slip motion (see Fig. All coils are a homogenised multi-group, if that matters. Results are compared with the predictions of a 1D analytical model at each frequency and a representative experimental value at 50 Hz. Finally, the wireless energy transfer system is optimized with respect to coil geometry and circuit components using gradient-based algo- Oct 01, 2012 · If the device is subject to an externally applied driving acceleration A d (t), the moving magnet’s dynamics are. This winding results in a uniform magnetic field between the coils with the primary component parallel to the axes of the two coils. Lastly, when I modify the I_coil variable to be time-dependent, my results don't make sense. s) is proportional to the induced voltage in the primary coil (V. The BL(x) plot is very close to the measured Klippel response and reveals that the voice coil is slightly off-center. This introductory tutorial model demonstrates how to find the fundamental resonance frequency of an RF coil as well as how to perform a frequency sweep to extract the coil's Q-factor. coil principle. This feature was previously called Reference Edge. You will also learn how to excite different types of coil structures, use infinite elements to model domain truncation, perform. NASA Astrophysics Data System (ADS) Bae, Byung-Hoon; Choi, Jung-Mi; Kim, Soo-Yong. This means that a complex litz wire, which is composed of many strands, can be replaced with a homogeneous material. I am trying to follow the Helmholtz Coil example in the model library for a rectangular coil form. | COMSOL develops mathematical modeling software for driving new breakthroughs in physics and engineering. I designed my rectangular coil form and imported it as a. Likewise, the flux linking coil one, L 1 when a current flows around coil two, L 2 is exactly the same as the flux linking coil two when the same current flows around coil one above, then the mutual inductance of coil one with respect of coil two is defined as M 21. Prodotti consigliati. The resistance of the coil wire is then not taken into account in the modeling. The COMSOL discussion forum covers a wide variety of simulation topics. | COMSOL develops mathematical modeling software for driving new breakthroughs in physics and engineering. by Walter Frei. COMSOL Multiphysics. Numerical modelling on tearing mode stabilization by RF current due to electron cyclotron current drive (ECCD) has been carried out for the purposes of disruption avoidance, focusing on stabilizing the magnetic island which can grow to a large width and therefore, might cause plasma disruption. GERBER is the standard format for PCB tracks. csv; Find file Blame History Permalink. Learn how to model a multiturn coil using COMSOL Multiphysics ® and the AC/DC Module. As we all are pretty new with COMSOL, we wonder if you you could give us a hint how to start with. Its norm is constant through the coil volume and defined by: _ *( _ _ _ _ ) _ _ * 0 h coil r coil out. In this work, the 3-dimensional magnetic field distribution of this hybrid coil is simulated using COMSOL Multiphysics. the impedance of the coil in air only using COMSOL, and it is called Zair_num. Whenever modeling magnetic fields in steady-state, transient, or frequency domain with the AC/DC Module, we want to reduce the size of the model as much as possible to minimize the computational resources and time needed to solve the model. This separation is equal to the radius of the coils. One of the common uses of COMSOL Multiphysics with the AC/DC Module and Heat Transfer Module is for modeling inductive heating, the process by which a coil is used to heat up a workpiece over time. This paper presents a synthesis of analytical calculations of magnetic parameters (field, force, torque, stiffness) in cylindrical magnets and coils. 3a offers acoustics analysis based on the boundary element method. I was able to dig out the code and here it is for those who might still be interested. I draw a cross-sectional view of it (2D). If 2A current. Browse the threads and share your ideas with the COMSOL community. In version 5. Hi everybody, I've tried to design a spiral coil in COMSOL but the model did not work because of the wrong port excitation. project for wire plotting of membrane speakers. To compute the velocity field in the model, I have coupled the two models using multiphysics option. 0, via Wikimedia Commons. 3-1 AcousticsModel ModelDefinition COMSOLMultiphysics ModelingUsing GraphicalUser Interface AbsorptiveMuffler 16 Introduction 16Model Definition 16Results 18Modeling COMSOLMultiphysics 21References. First, the current in each turn is adjusted with the objective of having a uniform magnetic flux density along the centerline. Planar coils can be used for all sorts of technology, including: * Wireless power transfer * RFID * Induction heating You can compute the inductance and resistance of a coil design, like the one. Ted Baker(テッドベーカー)のショルダーバッグ「AMAYI べっ甲風ハンドル ストロー バケットバッグ」(251530146)を. The voltage found through the Coil group setting is used to evaluate the mutual inductance, which agrees well with the analytic data. COMSOL Multiphysics offers an easy way for computing mutual inductance in a variety of different circuit arrangements. The impedance of the coils is very large at high frequencies. If 2A current. 2000-02-01. In this video, we show how to add multiple turns to the primary and secondary coils in. Suppose two coils are placed near each other, as shown in Figure 11. The cores for Tesla coil secondary coils are usually plastic, and smaller ones may be cardboard, and therefore count as air core coils. As you can see in the model attached, (COMSOL 4. COMSOL Multiphysics ® designed to assist you to solve and model low-frequency electromagnetics. Electromagnetics Modeling in COMSOL • RF Module - High-frequency modeling - Microwave Heating • AC/DC Module - Statics and low-frequency modeling • The susceptor is heated by a RF coil to high temperatures • This model investigates the temperature in a hot-wall furnace reactor used for silicon carbide growth. COMSOL can only import ODB (X)++ PCB tracks geometry. Exploiting Symmetry to Simplify Magnetic Field Modeling. In the next five parts of the course, we address this topic in depth. Whenever you are modeling coils with the AC/DC Module in COMSOL Multiphysics, you need to consider what type of boundary conditions to use to truncate your modeling domain. Browse the threads and share your ideas with the COMSOL community. Application ID: 6126. RF coils are important in numerous applications ranging from wireless technology to MRI scanning equipment. Image by Sfu. × Warning Your internet explorer is in compatibility mode and may not be displaying the website correctly. Fem Based Design And Simulation Tool For Mri Comsol Com Electromagnetic Coil Comsol Multiphysi. Numerical modelling on tearing mode stabilization by RF current due to electron cyclotron current drive (ECCD) has been carried out for the purposes of disruption avoidance, focusing on stabilizing the magnetic island which can grow to a large width and therefore, might cause plasma disruption. I am trying to follow the Helmholtz Coil example in the model library for a rectangular coil form. I've tried playing around with other parameters such as increasing current and number of coil turns, but didn't see much effect. I have attached my model but I am having trouble getting the plot that was shown. Licensed under CC BY-SA 3. Figure 1 – Aluminum enclosure with inserted coil a) side view of assembly; b) top view / inside the box Model of coil: The geometry of coil and the enclosure is created in CAD software and then imported into COMSOL. A Helmholtz coil is a parallel pair of identical circular coils spaced one radius apart and wound so that the current flows through both coils in the same direction. In this video, you will learn how you can design and simulate physical quantities and electromagnetic components like:• electric and magnetic flux (E and B)•. The COMSOL discussion forum covers a wide variety of simulation topics. COMSOL Multiphysics ® designed to assist you to solve and model low-frequency electromagnetics. For the windings i tried to realise it with a helix. It consists of two electromagnets on the same axis. Most coil design formulæ, however, pretend that μ is a linear quantity. Analyzing the Magnetic Field of a. Other product brandnames registeredtrademarks respectiveholders. Analysis of high power coil in COMSOL by delcti An electromagnetic and mechanical multi-phisycs model was made to study the deformation of a coil coated in epoxy resin before a high power pulse. 5, the Design Module provides an entirely new sketching tool for easier creation and more versatile parametric control of geometry models. ZERO BIAS - scores, article reviews, protocol conditions and more. Analyzing the Magnetic Field of a. The induced currents are called eddy currents. ESSENTIALS OF POSTPROCESSING AND VISUALIZATION IN COMSOL MULTIPHYSICS 2 the current flows through both coils in the same direction. comsol; magnet-coil-force. csv; Find file Blame History Permalink. More number of toroidal coils, steadier magnetic field is formed, but the large numbers of coils reduce the access to plasma for measurement. Fixed Price Project | Posted 3 months ago. A Rogowski coil consists of a uniformly wound coil with a nonmagnetic core, and the output voltage is proportional to the derivative of the primary current. Figure 1 - Aluminum enclosure with inserted coil a) side view of assembly; b) top view / inside the box Model of coil: The geometry of coil and the enclosure is created in CAD software and then imported into COMSOL. When designing Helmholtz coils, a question naturally arises: How uniform is the magnetic field and over what distance? To answer this, we can turn to the COMSOL Multiphysics® software. Linear Electric Motor of the Moving Coil Type 30 line modeling using COMSOL Script is available in yet another book, the COMSOL Multiphysics Scripting Guide. RF coils are important in numerous applications ranging from wireless technology to MRI scanning equipment. Advantage including high accuracy, wide measruement and frequency range, and no additional integrator and power supply is needed. I draw a cross-sectional view of it (2D). s) is proportional to the induced voltage in the primary coil (V. In addition, a further model for a slightly different rail geometry with the possibility of rail. 8 mm long and has a cross-sectional diameter of 9. The cores for Tesla coil secondary coils are usually plastic, and smaller ones may be cardboard, and therefore count as air core coils. The magnetic flux lines (left) and induced currents (right) for a coil group arrangement. COMSOL, COMSOL Multiphysics, Capture the Concept, COMSOL Desktop, COMSOL Server, LiveLink, and Simulation for Everyone through the windings of one coil creates a magnetic ˚ ux that induces current in an adjacent coil. GERBER is the standard format for PCB tracks. Suggestion de Produits. Posted 2015/04/10 7:25 GMT-7 AC/DC & Electromagnetics Version 5. Consequently, we present first the analytical. The same excitation can also be used for Single Turn Coil as well. CONTENTS| 5 Lumped Parameters 95 Calculating Lumped Parameters with Ohm's Law. Oscillating magnet in a multi-turn coil. Dear colleagues, I need to modeling Ac coil to inducting a AC magnetic field for my project. F=qv X B Coil In vacuum with current 0. Application ID: 6126. In COMSOL Multiphysics version 4. Browse the threads and share your ideas with the COMSOL community. I have attached my model but I am having trouble getting the plot that was shown. Download evaluation license**. Some examples of this noise include the mains hum, hum of transformers, the whine of some rotating electric machines, or the buzz of fluorescent lamps. Numerical modelling on tearing mode stabilization by RF current due to electron cyclotron current drive (ECCD) has been carried out for the purposes of disruption avoidance, focusing on stabilizing the magnetic island which can grow to a large width and therefore, might cause plasma disruption. In some cases the analytic approach could be difficult and with increasing complexity of geometries of some coils these are sometimes quite difficult to calculate, thus use of finite. update · e7e5a9e4 Sam Calisch authored Dec 08, 2018. This is possible to do within the COMSOL Multiphysics® software by using the add-on AC/DC Module and Optimization Module to combine parameter and shape optimization. First, the current in each turn is adjusted with the objective of having a uniform magnetic flux density along the centerline. The parameters of the coil were calculated using COMSOL Multiphysics. Multiphysics Modeling Using COMSOL® rapidly introduces the senior level undergraduate, graduate or professional scientist or engineer to the art and science of computerized modeling for physical systems and devices. Several different approaches to optimizing a ten-turn axisymmetric coil are presented. Join us on June 24. project for wire plotting of membrane speakers. Analyzing the Magnetic Field of a. k_iso or mat2. Browse the threads and share your ideas with the COMSOL community. The 3D Single-Turn Coil feature was available in The Magnetic Fields Interface in previous versions of COMSOL Multiphysics. distribution in front of a large rectangular coil which is influencing a plasma. In addition, a further model for a slightly different rail geometry with the possibility of rail. 0, via Wikimedia Commons. Suggestion de Produits. GERBER is the standard format for PCB tracks. 746 seguidores no LinkedIn. Multiphysics Modeling Using COMSOL® rapidly introduces the senior level undergraduate, graduate or professional scientist or engineer to the art and science of computerized modeling for physical systems and devices. COMSOL _Magnet coil in COMSOL software. 95 Calculating Lumped Parameters Using the Energy Method. The COMSOL discussion forum covers a wide variety of simulation topics. The coils were subsequently made and tested as a successfully because of this work, fulfilling the technical requirements. How to Model a Basic Coil in COMSOL Multiphysics. Short tutorial on how to draw a coil in Comsol 4. This is possible to do within the COMSOL Multiphysics® software by using the add-on AC/DC Module and Optimization Module to combine parameter and shape optimization. To determine the right combination of products for your modeling needs, review the Specification Chart and make use of a free evaluation. Eddy current testing probe with dual half-cylindrical coils. In the Comsol software, i used 2D "magnetic field physics" (mf) and "multi-turn Coil". ) ranging from 169,906 (very coarse) to. 1 Changing current in coil 1 produces changing magnetic flux in coil 2. From single-turn and multi-turn coil arrangements to coil groups: Modeling mutual inductance using COMSOL Multiphysics. The COMSOL Multiphysics® simulation software is used to model designs, devices, and processes in all fields of engineering, manufacturing, and. As a solution, engineers can compute resistance and inductance in planar PCB coils using electromagnetics simulation software. Study settings for numeric multi-turn coil Add this step manually from Study 1 > Study Steps Drag this step up and ensure that it is located above Step 2: Stationary under the Study branch COMSOL will automatically setup the appropriate solvers An eigenvalue solver will first compute the direction of current flow in the coil domain. I draw a cross-sectional view of it (2D). The Helmholtz coils simulating and improved in COMSOL Abstract: The paper describes the simulating Helmholtz coils and improved Helmholtz coils in COMSOL. Dual-4 Ohm Subwoofers: 2. Comsol coil Comsol coil. comsol; magnet-coil-force. , provider of software solutions for multiphysics modeling and application design, is offering a preview of the upcoming release of COMSOL Multiphysics version 5. Sensors that measure voltage in medium-voltage scenarios use resistive voltage dividers, while capacitive dividers, on the other hand, are used for voltage. The magnetic flux lines (left) and induced currents (right) for a coil group arrangement. This introductory tutorial model demonstrates how to find the fundamental resonance frequency of an RF coil as well as how to perform a frequency sweep to extract the coil's Q-factor. SPECIFICATION. Add-on modules provide specialized functionality for electromagnetics, structural mechanics, acoustics, fluid flow, heat transfer, and chemical engineering. 5 for all COMSOL® software products. In addition, a further model for a slightly different rail geometry with the possibility of rail. In this work, the 3-dimensional magnetic field distribution of this hybrid coil is simulated using COMSOL Multiphysics. Particular functionality may be common to several products. In addition, a further model for a slightly different rail geometry with the possibility of rail. This paper presents a synthesis of analytical calculations of magnetic parameters (field, force, torque, stiffness) in cylindrical magnets and coils. Cathode rays bent into a circle via a Helmholtz coil. Graphical and numerical results are obtained by a magnetic flux density spatial. Send Private Message Flag post as spam. Figure 1 - Aluminum enclosure with inserted coil a) side view of assembly; b) top view / inside the box Model of coil: The geometry of coil and the enclosure is created in CAD software and then imported into COMSOL. The coils were subsequently made and tested as a successfully because of this work, fulfilling the technical requirements. Comsol coil - Casa Maiolica Comsol coil. COMSOL, Inc. Switch branch/tag. Computing the Voltage. Browse the threads and share your ideas with the COMSOL community. Some examples of this noise include the mains hum, hum of transformers, the whine of some rotating electric machines, or the buzz of fluorescent lamps. k_iso or mat2. This chapter introduces you to the capabilities of the module including an. In COMSOL Multiphysics version 4. Like all COMSOL modules, there is a library of ready-to-run models that make it quicker and easier to analyze discipline-specific problems. Get an introduction to modeling electromagnetic coils using COMSOL Multiphysics ® and the add-on AC/DC Module. Besides creating magnetic fields, Helmholtz coils are also used in scientific apparatus to cancel external magnetic fields, such as the Earth's magnetic field. The COMSOL discussion forum covers a wide variety of simulation topics. Some examples of this noise include the mains hum, hum of transformers, the whine of some rotating electric machines, or the buzz of fluorescent lamps. COMSOL Multiphysics. | COMSOL develops mathematical modeling software for driving new breakthroughs in physics and engineering. The coils have the same size and the same electric current. The 3D Single-Turn Coil feature was available in The Magnetic Fields Interface in previous versions of COMSOL Multiphysics. Suggested Products. Browse the threads and share your ideas with the COMSOL community. Planar coils can be used for all sorts of technology, including: * Wireless power transfer * RFID * Induction heating You can compute the inductance and resistance of a coil design, like the one. Modeling Coils in COMSOL. In this 5-part series of video lectures, you will get comprehensive, step-by-step demonstrations of how to model EM coils. Multiphysics Modeling Using COMSOL® rapidly introduces the senior level undergraduate, graduate or professional scientist or engineer to the art and science of computerized modeling for physical systems and devices. First, the current in each turn is adjusted with the objective of having a uniform magnetic flux density along the centerline. COMSOL Multiphysics August 19, 2015 · From single-turn and multi-turn coil arrangements to coil groups: Modeling mutual inductance using COMSOL Multiphysics. The paper describes the simulating Helmholtz coils and improved Helmholtz coils in COMSOL. Optimizing Coils. The voltage found through the Coil group setting is used to evaluate the mutual inductance, which agrees well with the analytic data. RF coils are important in numerous applications ranging from wireless technology to MRI scanning equipment. I'm a student, new to Comsol, and I'm trying to simulate a copper coil with a current of 100A, at 50Hz, and an Iron/Aluminum screen to see how it shields the electromagnetic field. coil, this one is assumed as a medium having an uniform vector current density J0 (Figure 3). Register Today! Summary. are the number of turns in the secondary and primary. This allows for a quasi-static approach that speeds up the model, but it disallows the Coil Geometry Analysis to use its own equation form. 26x10-6, it's just another way of writing 0. I have attached my model but I am having trouble getting the plot that was shown. To start, we guide you through the COMSOL Multiphysics ® user interface, explaining the purpose and use of each aspect. Send Private Message Flag post as spam. You will also learn how to excite different types of coil structures, use infinite elements to model domain truncation, perform. Image by Sfu. Suggested Products. Bi-2212, from wire to test coil P. A Rogowski coil consists of a uniformly wound coil with a nonmagnetic core, and the output voltage is proportional to the derivative of the primary current. The variable V_coil must give the voltage over the device, defined in the global scope. I set the material to copper and set it up as a multi-turn coil domain. function g = coil(h,r,s,n) % Create a Coil Line Geometry Object % % Usage: % g = coil(h,r,s,n) % % Arguments: % h. Fem Based Design And Simulation Tool For Mri Comsol Com Electromagnetic Coil Comsol Multiphysi. The COMSOL discussion forum covers a wide variety of simulation topics. GERBER is the standard format for PCB tracks. COMSOL, Inc. First, the current in each turn is adjusted with the objective of having a uniform magnetic flux density along the centerline. × Warning Your internet explorer is in compatibility mode and may not be displaying the website correctly. The cores for Tesla coil secondary coils are usually plastic, and smaller ones may be cardboard, and therefore count as air core coils. I have done the geometry of the screen and tried to draw a ring shaped coil, but I cannot manage to set the current through the coil. Dual-4 Ohm Subwoofers: 2. View upcoming event registrations. I was able to dig out the code and here it is for those who might still be interested. Send Private Message Flag post as spam. Note that you can choose the unit of measurements for the loop diameter and wire diameter. The COMSOL discussion forum covers a wide variety of simulation topics. This COMSOL and MATLAB tool extracts homogenized material parameters for a litz wire. Bi-2212, from wire to test coil P. 3 | E-CORE TRANSFORMER (1) If two coils are coupled, Equation 1 can be used to deduce that the induced voltage in the secondary coil (V. Browse the threads and share your ideas with the COMSOL community. Comsol coil - ajj. I have coupled 3D quasi Static and 3D incompressible Navierstokes while modelling in 3D. Hello ! I am using Comsol Multiphysics in order to simulate the eddy currents in a damaged/cracked steel circular rod, with a helix coil surrounded it and thus creating the alternativ magnetic field. A COMSOL Multiphysics geometric model representation of a power-off brake with a permanent magnet. 4 of the COMSOL® software, to model the coil geometry on one plane. We will also discuss the different approaches for use in the low-frequency, mid-frequency, and high-frequency regimes, as well as meshing and solving. In Part 16 of this course, Introduction to Coil Modeling, you will learn how to build a 3D coil model geometry by adding the material properties; setting up the physical model; as well as meshing, solving, and evaluating the results. In this 5-part series of video lectures, you will get comprehensive, step-by-step demonstrations of how to model EM coils. In the Comsol software, i used 2D "magnetic field physics" (mf) and "multi-turn Coil". Experimental materials characterization (stress-strain curve) data. it Comsol coil. You will also learn how to excite different types of coil structures, use infinite elements to model domain truncation, perform. COMSOL Access is a service we provide to our users and prospects. Browse the threads and share your ideas with the COMSOL community. In this work, the 3-dimensional magnetic field distribution of this hybrid coil is simulated using COMSOL Multiphysics. Solved with COMSOL Multiphysics 4. The impedance of the coils is very large at high frequencies. I set the material to copper and set it up as a multi-turn coil domain. First, the current in each turn is adjusted with the objective of having a uniform magnetic flux density along the centerline. “The recent addition of the boundary element method in COMSOL Multiphysics will enable us to model large acoustical radiation problems, such as, exterior sound reproduction for electric cars” comments Martin Olsen, Principal Engineer, Research, at Harman Lifestyle. Modeling Electromagnetic Coils in COMSOL Multiphysics. When changing the license file on the license server, COMSOL Multiphysics loses contact to the license server Solution Number: 1271 Applies to: COMSOL Multiphysics Versions: 5. To make the modeling process more efficient, the AC/DC Module (an add-on to COMSOL Multiphysics) includes the Electric Currents in Shells interface, enabling you to analyze coil designs as (essentially) flat surfaces. Image by Sfu. COMSOL Multiphysics offers an easy way for computing mutual inductance in a variety of different circuit arrangements. The coil is supplied with DC current and. 1 Figure 11. To compute the velocity field in the model, I have coupled the two models using multiphysics option. Sponsor: COMSOL Duration: 1 Hour. Graphical and numerical results are obtained by a magnetic flux density spatial d. Get an introduction to modeling electromagnetic coils using COMSOL Multiphysics ® and the add-on AC/DC Module. This means that a complex litz wire, which is composed of many strands, can be replaced with a homogeneous material. RF coils are important in numerous applications ranging from wireless technology to MRI scanning equipment. Dear colleagues, I need to modeling Ac coil to inducting a AC magnetic field for my project. 8 mm long and has a cross-sectional diameter of 9. Learn how to model a multiturn coil using COMSOL Multiphysics ® and the AC/DC Module. COMSOL Multiphysics. As a solution, engineers can compute resistance and inductance in planar PCB coils using electromagnetics simulation software. This mutual inductance is true irrespective of the size, number of turns, relative position or orientation of the two coils. Bi-2212, from wire to test coil P. Comsol coil Comsol coil. The induced currents are called eddy currents. Consequently high voltage is necessary for driving high current through the AC coil. | COMSOL develops mathematical modeling software for driving new breakthroughs in physics and engineering. Lastly, when I modify the I_coil variable to be time-dependent, my results don't make sense. This model uses a homogenization technique to calculate the current distribution inside the superconducting layers of a racetrack coil and to estimate its AC losses. Hello ! I am using Comsol Multiphysics in order to simulate the eddy currents in a damaged/cracked steel circular rod, with a helix coil surrounded it and thus creating the alternativ magnetic field. are the number of turns in the secondary and primary. Model file (Comsol Multiphysics, version 4. × Warning Your internet explorer is in compatibility mode and may not be displaying the website correctly. This is first of 3 presentations demonstrating a practical modeling method. Keywords: Comsol, toroidal coil, inductance, toroidal helix, symmetry. First, the current in each turn is adjusted with the objective of having a uniform magnetic flux density along the centerline. A COMSOL Multiphysics geometric model representation of a power-off brake with a permanent magnet. 0, via Wikimedia Commons. I have done the geometry of the screen and tried to draw a ring shaped coil, but I cannot manage to set the current through the coil. It has to be said that in COMSOL the power input is applied in the coils. Solved with COMSOL Multiphysics 4. 3D Magnetic Fields section of the AC/DC module is considered for geometry (Figure 1). for applications including resistors, capacitors, inductors and coils, motors, magnets, and electromagnetic heating. The Single-Turn Coil feature is used to model the coil arrangement in a DC state. Workpiece being inductively heated over time. In this course, you will be guided through the entire process of building coil models from start to finish. Ole Wolff have both Comsol for simulation and Klippel for verification, which is a very powerful combination. Dear All, I have problem in modeling of a birdcage coil in Comsol simulation software. Bosque -COMSOL Conference: Boston 05 October 2017 7 Multiphysics FEA: Addressing primary concerns Models studied on a wire-by-wire level • 4. Comsol coil - ajj. Download Citation | On Sep 1, 2019, Peter Hrabovsky and others published The Design and Simulation of Spiral Planar Coil in COMSOL Multiphysics | Find, read and cite all the research you need on. In order to solve for the voltage, you must take the integral of the magnetic fields over domains of the flashlight. simulation magnetic field for coils with comsol. Planar coils can be used for all sorts of technology, including: * Wireless power transfer * RFID * Induction heating You can compute the inductance and resistance of a coil design, like the one. and Multi-Turn Coil Domain features in COMSOL's Magnetic Fields interface for modeling coils in 3D • These features are available only with the AC/DC Module • They are suitable for computationally efficient modeling of current-carrying conductors creating magnetic field • Additional information related to suitability of using these coil. Because the core is made of steel, a magnetostrictive material, these. 111 The AC/DC Module Model Library consists of a set of models from various Extensive information about command- line modeling using MATLAB is yet another book, the COMSOL Multiphysics MATLAB Interface Guide. Experimental materials characterization (stress-strain curve) data. My question is: is it possible to connect individual coils in series in some way? for example, let's consider two coils A and B. The sphere encapsulates the coil, and is given an outer layer to form the infinite element domains. Improved Helmholtz coils allows to create a magnetic field with inhomogeneity is not more than 1 % at a distance of half the radius of the geometric center of the coils system. Figure 1 – Aluminum enclosure with inserted coil a) side view of assembly; b) top view / inside the box Model of coil: The geometry of coil and the enclosure is created in CAD software and then imported into COMSOL. To start, we guide you through the COMSOL Multiphysics ® user interface, explaining the purpose and use of each aspect. The coils have the same size and the same electric current. coil, this one is assumed as a medium having an uniform vector current density J0 (Figure 3). In this 5-part series of video lectures, you will learn step by step how to build a 3D coil model. To compute the velocity field in the model, I have coupled the two models using multiphysics option. April 20, 2017. × Warning Your internet explorer is in compatibility mode and may not be displaying the website correctly. The combination of COMSOL ® products required to model your application depends on several factors and may include boundary conditions, material properties, physics interfaces, and part libraries. Short tutorial on how to draw a coil in Comsol 4. The 2HC coil induces a linear eddy current on the narrow. As we could transfer the geometry from a CAD system we easyly will have the model, but I doubt that the complexity of this model will be helpfull for finding a solution. This winding results in a uniform magnetic field between the coils with the primary component parallel to the axes of the two coils. This feature is obsolete — the recommended approach to model the same physical system is to use a Coil feature with the Single conductor model, or The Magnetic and Electric Fields Interface. Here, I am not adding my voice as it's quite simple to follow the steps :)#spi. For example, 0. F=qv X B Coil In vacuum with current 0. This is all very approximate, but you must accept inaccuracy if you insist on treating a non-linear quantity as though it was actually linear. Three Dual Voice Coil Speakers in Series / Parallel. Dual-6 Ohm Subwoofers: 4 Ohms. In this 5-part series of video lectures, you will get comprehensive, step-by-step demonstrations of how to model EM coils. The results when applying a PWM-type excitation to the coil show that the rise time of the source and the characteristics of insulation layers have an important effect on the transient overvoltage produced at different turns of the coil, the potential difference between. Fem Software Comsol Multiphysicstm, supplied by COMSOL, used in various techniques. I have attached my model but I am having trouble getting the plot that was shown. GERBER is the standard format for PCB tracks. ROGOWSKI COIL CT Accuenergy's Flexible Rogowski Coil is designed to use where regular solid or split core current transformers cannot fit, and ideal for power quality monitoring such as harmonics. Dear All, I have problem in modeling of a birdcage coil in Comsol simulation software. I designed my rectangular coil form and imported it as a. Connecting the two voice coils of each driver in series (+ to -) and the drivers themselves in parallel (+ to +, etc. Dear colleagues, I need to modeling Ac coil to inducting a AC magnetic field for my project. Thus the function convert a GERBER file into a ODB (X)++ for COMSOL (or other software). AC/DC MODULE - home page Induction Currents from Circular Coils. update with 10mm z length · 35425024 Sam Calisch authored Dec 06, 2018. This is replaced in the current version by a Single-Turn Coil domain node with the Coil Group check box selected. This means that a complex litz wire, which is composed of many strands, can be replaced with a homogeneous material. 3b ©2013 COMSOL. comsol conference 2018 boston october 3–5 boston marriott newton minicourses magnets, coils, and motors wednesday october 3, 1:00pm moisture transport and heat. Dear colleagues, I need to modeling Ac coil to inducting a AC magnetic field for my project. Select the measurement units (inches or centimeters). The first coil has N1 turns and carries a current I1 which gives rise to a magnetic field B1 G. As a material of the coil the copper with conductivity. Add-on modules provide specialized functionality for electromagnetics, structural mechanics, acoustics, fluid flow, heat transfer, and chemical engineering. Thermal runaway and excitation tests of the prototype made of the same coil were performed [4,5]. In this video, you will learn how you can design and simulate physical quantities and electromagnetic components like:• electric and magnetic flux (E and B)•. COMSOL Multiphysics ® designed to assist you to solve and model low-frequency electromagnetics. × Warning Your internet explorer is in compatibility mode and may not be displaying the website correctly. 2a with Matlab Browsing latest articles Browse All 42 View Live Re: How to loop simulations in Comsol 4. 5 Virtual geometry operations ü ü ü ü Coil analysis tools ü ü ü. Alex Hammerer. comsol 製品について comsol multiphysics ® ソフトウェアでは工学アプリケーションや物理現象の違いに関わらず, いつも同じユーザーインターフェースとユーザー体験をえられます. Heat exchangers are used to transfer thermal energy, usually between two fluids. In the Comsol software, i used 2D "magnetic field physics" (mf) and "multi-turn Coil". Particular functionality may be common to several products. Modeling Coils in COMSOL. ) will result in the following impedances: Dual-8 Ohm Subwoofers: 5. It is found that the Rac (AC resistance). 6 at the COMSOL Conference 2020 North America, October 7-8. Like all COMSOL modules, there is a library of ready-to-run models that make it quicker and easier to analyze discipline-specific problems. The plasma density is concentrated in the center of the reactor, and its concentration towards the walls has a sharp decline. We will also discuss the different approaches for use in the low-frequency, mid-frequency, and high-frequency regimes, as well as meshing and solving. Enter the coil diameter (form diameter + wire diameter - see diagram). Inductance and Magnetic Energy 11. Graphical and numerical results are obtained by a magnetic flux density spatial d. Download aissani_presentation. You will also learn how to excite different types of coil structures, use infinite elements to model domain truncation, perform. Join us on June 24. When designing electromagnetic coils, we may want to adjust the position of the coils to achieve a desired magnetic field strength within a particular region of space. Comsol coil Comsol coil. Comsol coil - agju. 2a to model a NIST prototype birdcage RF coil using two low-pass coil mesh design types: Mesh-1, a series of 15 all-tetra-10-element designs with degrees of freedom (d. It has to be said that in COMSOL the power input is applied in the coils. We start by working in the 2D axisymmetric space. Due to the voltage difference, a current will flow through the wire. In this course, you will be guided through the entire process of building coil models from start to finish. BR) Lorentz Forces coil source stresses • Coupling the J. Image by Sfu. The Helmholtz coil refers to the arrangement of two conductor loops which generate an almost homogeneous magnetic field in the center of the structure (Fig. More number of toroidal coils, steadier magnetic field is formed, but the large numbers of coils reduce the access to plasma for measurement. Get an introduction to modeling electromagnetic coils in 3D using COMSOL Multiphysics ® and the AC/DC Module. Application ID: 124. Anup Anurag. rises, the electric conductivity of the copper changes. SPECIFICATION. The induced currents are called eddy currents. In addition, any model you. Tagged under Electromagnetism, Comsol Multiphysics, Electromagnetic Induction, Direct Current, Computer Software. Short tutorial on how to draw a coil in Comsol 4. A useful laboratory technique for getting a fairly uniform magnetic field is to use a pair of circular coils on a common axis with equal currents flowing in the same sense. compraebook. Study settings for numeric multi-turn coil Add this step manually from Study 1 > Study Steps Drag this step up and ensure that it is located above Step 2: Stationary under the Study branch COMSOL will automatically setup the appropriate solvers An eigenvalue solver will first compute the direction of current flow in the coil domain. The function can changes to units, set. 3b ©2013 COMSOL. 3D Magnetic Fields section of the AC/DC module is considered for geometry (Figure 1). Most coil design formulæ, however, pretend that μ is a linear quantity. 3a and earlier, a separate Coil Group Domain node was available. Follow along in Part 4 of this course, Introduction to Coil Modeling, as we continue with step-by-step demonstrations of modeling coils in the COMSOL ® software. This is first of 3 presentations demonstrating a practical modeling method. The COMSOL discussion forum covers a wide variety of simulation topics. Here, I am not adding my voice as it's quite simple to follow the steps :)#spi. The cores for Tesla coil secondary coils are usually plastic, and smaller ones may be cardboard, and therefore count as air core coils. An arrangement of two single-turn coils. comsol conference 2018 boston october 3–5 boston marriott newton minicourses magnets, coils, and motors wednesday october 3, 1:00pm moisture transport and heat. I created the coil in MATLAB and then imported it as an object in FEMLAB. Contact technical support. I'm attaching a 3D model of my setup (with the brown representing the coils, grey the iron core, and the ), and also COMSOL's steady-state results. representative, go to other COMSOL websites, request information and pricing, submit technical support queries, subscribe to the monthly eNews email newsletter, and much more. COMSOL coil group which crosses the modeling plane more than once I'm trying to model a system in the magnetic field, 2D-axisymmetric environment, with current loops which pass the modeling place both once and more than once. 2 T is displaced sinusoidally at 4 Hz with a 30-millimeter peak displacement inside an 800-turn coil. To do so, you can use the Electric Currents in Shells interface, available as of version 5. COMSOL Multiphysics®, we demonstrated that to improve the performances of a multi-layers surface coil, the geometry has to be chosen carefully. Electromagnetic Coil COMSOL Multiphysics Computer Software Electric Current PNG is a 692x671 PNG image with a transparent background. COMSOL Multiphysics ® designed to assist you to solve and model low-frequency electromagnetics. Posted 2015/04/10 7:25 GMT-7 AC/DC & Electromagnetics Version 5. COMSOL announced the deadline to submit presentation abstracts for the COMSOL Conference 2018. Hello ! I am using Comsol Multiphysics in order to simulate the eddy currents in a damaged/cracked steel circular rod, with a helix coil surrounded it and thus creating the alternativ magnetic field. 222 A works but 0. Please login with a confirmed email address before reporting spam Hii all, I am trying to simulate a simple geometry and I am having problems in giving a particular value of current. The cores for Tesla coil secondary coils are usually plastic, and smaller ones may be cardboard, and therefore count as air core coils. Browse the threads and share your ideas with the COMSOL community. Note that you can choose the unit of measurements for the loop diameter and wire diameter. Coil Inductance Calculator To calculate the inductance of a single-layer, air-core coil: 1. Helmholtz coils are used by scientists to generate uniform magnetic fields to study electromagnetism and its characteristics. As we all are pretty new with COMSOL, we wonder if you you could give us a hint how to start with. Suppose two coils are placed near each other, as shown in Figure 11. update · e7e5a9e4 Sam Calisch authored Dec 08, 2018. other field simulation in COMSOL Multiphysics • Elastic shear and pressure waves • Perfectly matched layers (PMLs) for elastic and piezo waves • Thermoelastic effects • 2D or 3D modeling • Retrieve Impedance, Admittance, Current, Electric Field, Voltage, Stress-strain, Electric Energy Density, Strain Energy Density. Send Private Message Flag post as spam. Tagged under Electromagnetism, Comsol Multiphysics, Electromagnetic Induction, Direct Current, Computer Software. comsol; magnet-coil-force-big-gap. 5 Virtual geometry operations ü ü ü ü Coil analysis tools ü ü ü. Browse the threads and share your ideas with the COMSOL community. called RF coils or resonators, and are key components in any MRI system. Alex Hammerer. Ted Baker(テッドベーカー)のショルダーバッグ「AMAYI べっ甲風ハンドル ストロー バケットバッグ」(251530146)を. the impedance of the coil in air only using COMSOL, and it is called Zair_num. Hello ! I am using Comsol Multiphysics in order to simulate the eddy currents in a damaged/cracked steel circular rod, with a helix coil surrounded it and thus creating the alternativ magnetic field. Geometry: The model geometry consists of a cylinder and a sphere. In Part 3 of the Introduction to Coil Modeling course, we cover how to model an electric circuit with a single-turn coil, secondary pickup coil, and magnetic core with step-by-step demonstrations in the COMSOL ® software. Workpiece being inductively heated over time. Here, the simulation of magnetic flux distribution of stator and rotor coil of the superconducting wind generator is performed using the sliding mesh tool of COMSOL Multiphysics. I set I_coil to be 4 sin (2 pi freq t) with freq = 70 kHz. and Multi-Turn Coil Domain features in COMSOL's Magnetic Fields interface for modeling coils in 3D • These features are available only with the AC/DC Module • They are suitable for computationally efficient modeling of current-carrying conductors creating magnetic field • Additional information related to suitability of using these coil. In the Comsol software, i used 2D "magnetic field physics" (mf) and "multi-turn Coil". I'm a student, new to Comsol, and I'm trying to simulate a copper coil with a current of 100A, at 50Hz, and an Iron/Aluminum screen to see how it shields the electromagnetic field. The output of the electric field was on the order of magnitude of 10^-13. When designing electromagnetic coils, we may want to adjust the position of the coils to achieve a desired magnetic field strength within a particular region of space. As we all are pretty new with COMSOL, we wonder if you you could give us a hint how to start with. Follow along in Part 4 of this course, Introduction to Coil Modeling, as we continue with step-by-step demonstrations of modeling coils in the COMSOL ® software. 0, via Wikimedia Commons. I created the coil in MATLAB and then imported it as an object in FEMLAB. Browse the threads and share your ideas with the COMSOL community. In addition, a further model for a slightly different rail geometry with the possibility of rail. One of the common uses of COMSOL Multiphysics with the AC/DC Module and Heat Transfer Module is for modeling inductive heating, the process by which a coil is used to heat up a workpiece over time. × Warning Your internet explorer is in compatibility mode and may not be displaying the website correctly. Image by Sfu. called RF coils or resonators, and are key components in any MRI system. 2a with Matlab: 0: 0. In addition, a further model for a slightly different rail geometry with the possibility of rail. 111 The AC/DC Module Model Library consists of a set of models from various Extensive information about command- line modeling using MATLAB is yet another book, the COMSOL Multiphysics MATLAB Interface Guide. Geometry: The model geometry consists of a cylinder and a sphere. Numerical modelling on tearing mode stabilization by RF current due to electron cyclotron current drive (ECCD) has been carried out for the purposes of disruption avoidance, focusing on stabilizing the magnetic island which can grow to a large width and therefore, might cause plasma disruption. Simulate real-world designs, devices, and processes with the COMSOL Multiphysics® software. Fixed Price Project | Posted 3 months ago. If you are just getting started with coil modeling in the AC/DC Module in COMSOL Multiphysics, you should also take a look at the following example models: Modeling of a 3D Inductor; Inductance of a Power Inductor; Magnetic Field of a Helmholtz Coil; Multi-Turn Coil Above an Asymmetric Conductor Plate; Multi-Turn Coil Winding around a Ferromagnet. August 1, 2017. As a solution, engineers can compute resistance and inductance in planar PCB coils using electromagnetics simulation software. In the Comsol software, i used 2D "magnetic field physics" (mf) and "multi-turn Coil". Download Citation | On Sep 1, 2019, Peter Hrabovsky and others published The Design and Simulation of Spiral Planar Coil in COMSOL Multiphysics | Find, read and cite all the research you need on. comsol conference 2018 boston october 3–5 boston marriott newton minicourses magnets, coils, and motors wednesday october 3, 1:00pm moisture transport and heat. • Install 2 temperature sensor in the coil • Run the coil in vacuum for about 3 hours. Graphical and numerical results are obtained by a magnetic flux density spatial d. COMSOL Multiphysics August 19, 2015 · From single-turn and multi-turn coil arrangements to coil groups: Modeling mutual inductance using COMSOL Multiphysics. × Warning Your internet explorer is in compatibility mode and may not be displaying the website correctly. Hello ! I am using Comsol Multiphysics in order to simulate the eddy currents in a damaged/cracked steel circular rod, with a helix coil surrounded it and thus creating the alternativ magnetic field. 5 for all COMSOL® software products. Comsol coil Comsol coil. This introductory tutorial model demonstrates how to find the fundamental resonance frequency of an RF coil as well as how to perform a frequency sweep to extract the coil's Q-factor. In this 5-part series of video lectures, you will learn step by step how to build a 3D coil model. The magnetic flux lines (left) and induced currents (right) for a coil group arrangement. Inductance and Magnetic Energy 11. Thermal runaway and excitation tests of the prototype made of the same coil were performed [4,5]. It is found that the Rac (AC resistance). This winding results in a uniform magnetic field between the coils with the primary component parallel to the axes of the two coils. The 2HC coil induces a linear eddy current on the narrow. csv; Find file Blame History Permalink. This introductory tutorial model demonstrates how to find the fundamental resonance frequency of an RF coil as well as how to perform a frequency sweep to extract the coil's Q-factor. COMSOL Multiphysics ® designed to assist you to solve and model low-frequency electromagnetics. Fixed Price Project | Posted 3 months ago. In this 5-part series of video lectures, you will learn step by step how to build a 3D coil model. Version: November 2006 COMSOL 3. Within Multi-Turn Coil 1 -> Multi-Turn Coil -> Coil excitation (Voltage) -> Voltage = 1[V]*sin(2*pi*50[Hz]*t). Since the current in the primary coil is constant (DC), it cannot create a changing magnetic field. their dipole moments are anti-aligned). The fact that the emf always opposes the change in current is an example of Lenz's law. Learn how to model a multiturn coil using COMSOL Multiphysics ® and the AC/DC Module. Linear Electric Motor of the Moving Coil Type 30 line modeling using COMSOL Script is available in yet another book, the COMSOL Multiphysics Scripting Guide. In this 5-part series of video lectures, you will get comprehensive, step-by-step demonstrations of how to model EM coils. F=qv X B Coil In vacuum with current 0. ROGOWSKI COIL CT Accuenergy's Flexible Rogowski Coil is designed to use where regular solid or split core current transformers cannot fit, and ideal for power quality monitoring such as harmonics. SPECIFICATION. Transformer and Inductor modeling with Comsol Multiphysics. This 20-part course is an introduction to modeling electromagnetic coils using the COMSOL Multiphysics ® simulation software and the add-on AC/DC Module. Follow along in Part 4 of this course, Introduction to Coil Modeling, as we continue with step-by-step demonstrations of modeling coils in the COMSOL ® software. The parameters of the coil were calculated using COMSOL Multiphysics. In addition, a further model for a slightly different rail geometry with the possibility of rail. Hello ! I am using Comsol Multiphysics in order to simulate the eddy currents in a damaged/cracked steel circular rod, with a helix coil surrounded it and thus creating the alternativ magnetic field. The parameters V_coil and I_coil are the variables that links the model file with the circuits. Here, the simulation of magnetic flux distribution of stator and rotor coil of the superconducting wind generator is performed using the sliding mesh tool of COMSOL Multiphysics. To compute the velocity field in the model, I have coupled the two models using multiphysics option. Trociewitz Applied Superconductivity Center National High Magnetic Field Laboratory, Tallahassee, FL, USA Figure 1. Browse the threads and share your ideas with the COMSOL community. Short tutorial on how to draw a coil in Comsol 4. This introductory tutorial model demonstrates how to find the fundamental resonance frequency of an RF coil as well as how to perform a frequency sweep to extract the coil's Q-factor. A model was produced to simulate induction welding of rails that provided a suggested coil design to achieve a strong weld.