Solving an electrical spice circuit using Comsol Multiphysics
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- Опубліковано 11 лют 2025
- This tutorial demonstrates how the 'electrical circuit interface' in Comsol can be used to solve for currents and voltages in a spice circuit. Constructing a circuit can be simply done by inserting the desired electrical components and defining the connections by specifying node numbers. Any node numbers can be used as long as the numbering is consistent for all components. The electrical circuit can be coupled with another physics interface.
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Cool and compact tutorial - great work!
simple and helpful. thanks
hello, im currently want to do a circuit consist of transmitting coil and receiving coil, plus with super magnets to make the magnetic force directly pointing to receiving coil to enchance it. So what proper setup should i make in COMSOL, really appreciate if you could reply.
If I understood correctly, you want to place a magnet next to a coil. You can construct the required geometry in 3D/2D and then connect the coils in the mf interface to an electric circuit with several elements. You have the option of taking the voltage or current from a physics interface to be used in the circuit.
Hi! it was helpful! In COMSOL Multiphysics, electrical circuit, is posible simulate an switch?
There isn't a direct option for adding a switch but you may do it indirectly. For example, you can add a resistor in a circuit whose resistance changes from low (close circuit) to very high (open circuit). This resistance can be defined by a function (such as step) in the time domain.
Thank you!
Once all the nodes are labeled in COMSOL, can COMSOL generate the schematic diagram?
No it can't generate a schematic diagram, but it can export the nodes to be used in another model or software.
Can I simulate the effects of lightning current by this way?
Awesome!
Thanks Sir
Or you could just use LTspice to do it .. it's free and actually designed for simulating circuits much more complicated than what you show.
You are right but in COMSOL you can couple your analysis using Multiphysics.
How to simulate the Mutual induction, i mean LC inductive coupling circuits using this module??
There is a feature for the mutual inductance which you can add. Other than that you just need to insert he individual components which you have in your circuit.
Is it possible to see effect of superposition of magnetic fields with COMSOL?
I mean using sources together like permanent magnet and direct current source or transient current source or sinusoidal current source, pls watch this ua-cam.com/video/n_fCTs3ZAtc/v-deo.html.
I just wonder if we add a DC magnetic field source to the induction heating system it will make a negative or positive contribution to the heating.
You can add a permanent magnet with a DC current source in a time-dependent study but it will not have any contribution to induction heating. Induction heating is done from the heat generated by eddy currents, which are only generated from an alternating magnetic field (AC source). A DC magnetic field will be superimposed on the alternating field but since the DC component is time-invariant, it will not generate any eddy currents.
@@JafScience thanks for kind explanation. can u repeat these examples with comsol ua-cam.com/video/n_fCTs3ZAtc/v-deo.html.
If you have a specific doubt, describe it here.
@@JafScience Would u pls check here: drive.google.com/file/d/1WGzZlVOpc-AxFiF8XwDcZ8hxrm81aIKt , if the frequency is changed any induction heating occurs?
The study setup is not correct. Use a "frequency-transient" study to model the electromagnetic physics in the frequency domain and the heat transfer physics in the time domain. Frequency changes the amount of heat generated, depending on the material's properties.
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