Need A Finite Element Magnetics Code That Handles Dynamic Modeling

In summary, the conversation discusses the limitations of the Finite Element Method Magnetics (FEMM) solver in solving low frequency electromagnetic problems. The circuit being discussed is similar to the one described in U.S. Patent No. 6,362,718, which involves an AC power supply, a permanent magnet, a magnetic core, and input and output coils. The switching circuit drives electrical current at a frequency of 87.5 kHz through the input coils to produce opposing magnetic fields and manipulate the magnetic flux from the permanent magnet.
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Hammowe
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To the EE Forum,
I am a new guy on this Physics Forum and this is my first post. I have downloaded a free software code, Finite Element Method Magnetics (FEMM) solver (see http://www.femm.info/wiki/Download) but it doesn’t work because FEMM is limited to solving low frequency electromagnetic problems on two-dimensional planar and axisymmetric domains. FEMM addresses some limiting cases of Maxwell’s equations. The magnetics problems addressed are those that can be considered as “low frequency problems,” in which displacement currents can be ignored(displacement currents are typically relevant to magnetics problems only at radio frequencies).

Well, I'm in RF domain pulsing a circuit. The circuit is like the one in U.S. Patent No. 6,362,718, "Motionless Electromagnetic Generator, Mar. 26, 2002 (available from http://www.freepatentsonline.com). Details (sorry for the length!):
a system comprised of an AC power supply, a permanent magnet, a magnetic core, first and second input coils, first and second output coils, and a switching circuit. The magnetic core is positioned between opposite ends of the permanent magnet, and includes a first magnetic path around which the first pair of input and output coils extend, and a second magnetic path around which the second pair of input and output coils extend. The switching circuit drives electrical current alternately at 87.5 kHz (period of 11.45 microseconds) through the first and second input coils. The electrical current driven through the first input coil causes it to produce a magnetic field opposing a concentration of magnetic flux from the permanent magnet within the first magnetic path; likewise the electrical current driven through the second input coil produces a magnetic field opposing a concentration of magnetic flux from the magnet in the second magnetic path.
 
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FAQ: Need A Finite Element Magnetics Code That Handles Dynamic Modeling

What is a finite element magnetics code?

A finite element magnetics code is a software program used to simulate and analyze magnetic fields and their effects on materials or structures. It uses complex mathematical algorithms and equations to model the behavior of magnetic fields in a given system.

How does a finite element magnetics code handle dynamic modeling?

A finite element magnetics code handles dynamic modeling by incorporating time-varying inputs and changes in boundary conditions into its simulations. This allows for the analysis of magnetic systems that are constantly changing or in motion.

What types of systems can be modeled using a finite element magnetics code?

A finite element magnetics code can be used to model a wide range of systems, including motors, generators, transformers, and other electromagnetic devices. It can also be applied to study the behavior of magnetic materials, such as iron cores, inductors, and permanent magnets.

How accurate are the results obtained from a finite element magnetics code?

The accuracy of results obtained from a finite element magnetics code depends on various factors, such as the complexity of the system being modeled, the quality of input data, and the accuracy of the mathematical models used. However, with proper calibration and validation, a well-developed code can provide highly accurate results.

What are some popular finite element magnetics codes used in research and industry?

Some popular finite element magnetics codes used in research and industry include ANSYS Maxwell, COMSOL Multiphysics, and JMAG. These codes offer a variety of features and capabilities for modeling and analyzing dynamic magnetic systems and are widely used in various fields, including electrical engineering, materials science, and renewable energy.

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