The license is perpetual, but if you do not pay the yearly maintenance fee about 20% of the license cost then you will not be able to use the license with new versions of the comsol software. It is simple to use but flexible so it can help you not just to make calculations but to find optimal measures or experiment with very flexible parameters. If you only have two conductors, the recipe is simple. How to calculate a capacitance matrix in comsol multiphysics. An inductor usually has a magnetic core to increase the inductance, while. The inductance calculator below also takes inches, as well as centimeters and millimeters, and does the conversion to meters for you. Numerical inductance calculations based on first principles. Take one conductor and set it to grounded, set the other as. Coil maestro solenoid inductance calculator software download. Not sure if you find the comsol model wizard somewhere else, maybe other commercial multiphysics software but not in the opensource community. This discussion is about an older version of the comsol multiphysics software.
To calculate the force on the rod, use the surface stress tensor, which is. Program calculates optimal dimensions of coils for wanted inductance. Bo zhang, senior engineer at pinggao group, explains. All updates and technical support are provided for the 12 months following the purchase. A planar spiral inductor calculator based on lumped elements for rf and microwave circuits by inder bahl. Computing the inductance of a straight wire comsol blog. Comsol multiphysics is an engineering, design, and finite element analysis software environment for the modeling and simulation of any physicsbased system. Wire self inductance calculator tool eeweb community. The article describes the design of the spiral planar coil in the simulation program with the. This calculator is designed to compute the inductance of a loop of wire given the diameter of the loop and the diameter of the wire used for the. Jun 07, 2017 capacitance calculations in the comsol multiphysics software seem easy. 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.
Inductance calculation example finite element method. This is achieved through the accurate determination of different magnetic flux density components within the proposed geometry. Does anyone have the matlab code to calculate and plot the mutual inductance, efficiency, and the coupling coefficient. Comsol multiphysics not only allows easy set up of circuit models, which you can do within the software itself or by importing a spice net list, but also the subsequent connection of those circuit models to finite element models. Calculating induced voltage, induced current, mutual inductance and coupling coefficient. Define fluxparallel boundary condition magnetic vector potential 0 on the outermost boundaries. The model tree in the model builder gives you a full. Calculation of inductance and capacitance in power system transmission lines using finite element analysis method. Simulation of magnetic field topology in a saddleshaped. It is very easy to learn provided one must know the underlying theory behind the simulation, i.
Comsol multiphysics not only allows easy set up of circuit models, which you can do within the software itself or by. The following is a design tool which calculates the inductance of an air core inductor. Comsol webinar modeling coils and electric devices gamax ltd. Moving between the boxes by clicking or using the tab button on your keyboard, will update the result. When you expand comsol multiphysics with the rf module, you can access features for specialized rf and microwave modeling, in addition to the core functionality of the comsol multiphysics software platform. Electromagnetic compatibility emc testing analyze your designs using emi analyst emc software to ensure electromagnetic compatibility emc testing. Comsol multiphysics licenses may be perpetual or for a select term period. This page walks you through designing your own diyhomemade coil. Ive done it for making coils for crystal radios and tesla coils but it works for any coil thats cylindrical in shape. Notice that there is not a return path referenced in this inductance estimator. Discussion closed this discussion was created more than 6 months ago and has been closed. With more than 30 addon products to choose from, you can further expand the simulation platform with.
A loop of wire is a typical model for inductive materials. They can be conditionally divided into three levels high, medium and. With comsol multiphysics, you will be able to account for coupled or multiphysics phenomena. Comsol multiphysics is a generalpurpose platform, based on advanced numerical methods, for modeling and simulating physicsbased problems. Using comsol, we can solve for potential issues faster with fewer iterations and significantly reduce the testing cost.
Comsol multiphysics software was used to calculate the inductance. Comsol is one of the best software to date for multiphysics applications. For single layer coils, you may also use the following simpler calculators. Comsol software users who are onsubscription should submit their questions via the support center for a more comprehensive response from the technical support team.
Modeling software for rf, microwave, and millimeter. Simulation of magnetic field topology in a saddleshaped coil. We also determine the capacitance coupling of the singlestrip, doublestrip, threestrip, sixstrip, and eightstrip shielded microstrip lines. Hello, i am a newbie in comsol and i am using the version 4. It is simple to use but flexible so it can help you.
Design optimization of printed circuit board embedded. You can easily design inductors using this application. Therefore, one cannot utilise symmetry in the comsol multiturn coil model for calculating resistance or internal inductance. The license is perpetual, but if you do not pay the yearly maintenance fee about 20% of the license cost then you will not be able to use the license with new. Wire loop inductance calculator electrical engineering. The inductance of a flat spiral coil can be determined by entering its dimensions in the boxes above. A common task that femm might be applied to is the calculation of the inductance of a gapped inductor. Optimizing planar coils for pcbs with electromagnetics simulation. A question that comes up occasionally is whether or not you can compute the inductance of a single straight wire. This calculator is designed to compute the inductance of a loop of wire given the diameter of the loop and the diameter of the wire used for the loop. I am trying to calculate the self and mutual inductance between 2 coils in 3d. Comsol conduction heat transfer example 38 heat loss through. It is very easy to learn provided one must know the underlying. Understanding mutual inductance using comsol multiphysics.
Found on circuit boards, these coils are a good choice for inductive. Apr 19, 2016 the steps for modeling your 3d inductor in comsol multiphysics. Select two or three windings with equal mutual terms to implement a threephase mutual inductance with equal mutual coupling between the windings. A 3d model was developed to calculate the inductance l and quality factor. Nov 23, 2017 comsol webinar modeling coils and electric devices gamax ltd. Any eddy current losses are automatically included in the calculation and here, the. Inductance and capacitance matrix calculations comsol. To use this tool, just enter the diameter of the loop, the diameter of the wire, and the relative permeability.
This introductory model uses a design drawn in an external cad software and is imported for static and frequency domain analysis in the acdc module. A method of calculating inductances based on first principles is presented, which has the advantage over the more popular simulators in that fundamental formulas are explicitly used so that a. Advanced loudspeaker calculator an example of comsol apps. When designing these coils, its important to calculate both their inductance and resistance. Coil inductance calculator this calculator helps you compute the inductance of a coil. As well as increasing the number of coil turns, we can also. Advanced loudspeaker calculator an example of comsol apps utilization. Note that while comsol employees may participate in the discussion forum, comsol software users who are onsubscription should submit their questions via the support center for a more comprehensive response from the technical support team.
Analyzing mutual inductance in different coil arrangements. Following is an open office basic program to calculate the self inductance of a. Take one conductor and set it to grounded, set the other as a terminal, and compute the solution. Multilayer coil inductance calculator electron bunker. Generally, the command line applications are difficult to operate as they require commands as input to run. I need help for calculating of inductance of spiral coil square and circular. The simulation was carried out by comsol software comsol.
Pdf calculation of inductance and capacitance in power. The design and simulation of spiral planar coil in comsol. Power inductors are a central part of many lowfrequency power applications. The inductance calculated in this tool is the selfinductance, which is used in some simulations and is only part of a total loop inductance. You will experience speedup by a factor of up to ten in software responsiveness, as.
Eeweb have a free online coil inductance calculator for calculating the inductance of a coil for different configurations of wire size and positioning. Moving between the boxes by clicking or using the tab button. For example, in our 1100kv bushing test, reducing one test could save us 1. This seemingly simple question actually does not really have an answer, and gives us the opportunity to talk about a very interesting point when solving maxwells equations. Simulation of an inductive coupled power transfer system ieee. Main purpose of this calculator is to compare inductance, q. Comsol multiphysics solves the problem using a magnetostatic equation for the. The simulations allows for mutual inductance calculation between the primary.
The coil is the most recognizable form of an inductor. Inductance calculator is a portable and free calculator to calculate inductance of a coil. Evaluate your 3d inductor design with comsol multiphysics. Main purpose of this calculator is to compare inductance, q and resonant frequency and how they are scaled with inductor parameters. The model tree in the model builder gives you a full overview of the model and access to all functionality geometry, mesh, physics settings, boundary conditions, studies, solvers, postprocessing and visualizations. Transmission line parameter calculator comsol multiphysics. Comsol multiphysics software understand, predict, and optimize. Solenoid inductance calculator rectangular coil calculator.
Named single user license nsl a single named individual may use the software simultaneously on at most two computers but may install the software on up to four computers. Coil maestro solenoid inductance calculator download. Comsol multiphysics alternatives and similar software. Modeling and simulation of shielded microstrip lines. Following is an open office basic program to calculate the self inductance of a solenoidal coil using solid round wire. In this paper comsol multiphysics solves the magnetic fields surrounding the coil that is placed in electrical circuit and calculates the inductance of this coil. This seemingly simple question actually does not really have an answer, and gives us the. Calculating mutual inductance for different wire coil arrangements is easy with comsol multiphysics simulations. A teaching platform that could be used to help students understand concepts such as. Multi layer air coil design and calculator circuits. Vansic, calculating of inductance of spiral coil using comsol. Characteristics of double planar microinductor with patterned nife. Advanced loudspeaker calculator an example of comsol.
Comsol licensing engineering computer network purdue. This tool is designed to calculate the inductance of a coil of wire given the number of. Select the measurement units inches or centimeters. This is also useful is youre going to be using your coil in an lc tank resonant circuit.
Refer to the bottom of the page for explanation of input variables and other notes. The terminal boundary condition will excite the structure, and automatically compute the inductance using the above formula. The transmission line parameter calculator app computes resistance r, inductance l, conductance g, and capacitance c as well as the characteristic impedance and propagation constant for some common transmission lines types, such as a coaxial line, twin lead, microstrip line, and coplanar waveguide cpw. Calculating of inductance of spiral coil comsol multiphysics. Enter the coil length distance from first to last winding see diagram. Description the inductance calculated using this tool is the external inductance of the loop bounded by the flat conductor and the ground plane. They are, for example, used in the switched power supply for the motherboard and all other components in a computer. The mutual inductance between all other pairs of turns remains, as before, simply the distance between the centres. The steps for modeling your 3d inductor in comsol multiphysics.
The equation formulation in the 2d perpendicular induction currents. Modeling with comsol multiphysics means being able to move between simulating electromagnetics, structural mechanics, acoustics, fluid flow, heat transfer, and chemical reactions phenomena, or any other physics modeled by a system of pdes, in one software environment. Inductor modeling is in general more complex than the modeling of resistors and capacitors, but similar principles apply. How to calculate and plot mutual inductancetransfer distance. I had the same question a couple of years ago and i.
Multi layer air core inductor calculator formula used in this calculation is from wheelers approximations which is accurate to 5. They can be conditionally divided into three levels high, medium and low level. The inductance calculated in this tool is the self inductance, which is used in some simulations and is only part of a total loop inductance. Some of the distinct advantages i have experienced are.
Uploaded on a comsol server, the simulation software is accessible globally to all transducer engineers. Comsol multiphysics package, and they come with their own graphicaluser. Inductance of a power inductor comsol multiphysics. Comsol multiphysics is a generalpurpose software platform, based on advanced numerical methods, for modeling and simulating physicsbased problems. As well as increasing the number of coil turns, we can also increase inductance by increasing the coils diameter or making the core longer. Microstrip inductance model inductance of the loop bounded by the upper conductor and ground plane is. Coil inductance calculator to calculate the inductance of a singlelayer, aircore coil.
Note that while comsol employees may participate in the discussion forum, comsol software users who are on. The user will have the opportunity to select from five different inductor applications. We can use different methods to calculate the inductance using numerical methods or handbook formulas. Need an easy way to compute resistance, inductance, conductance, and capacitance of transmission lines. Use this calculator to find the inductance of a multilayer coil.