electrical circuit simulation in COMSOL will be discussed in this blog. I will try to explain how you can simulate a half-wave rectifier in comsol multiphysics. Simulating electric circuits is quite interesting and only a few software can actually do it properly. you can use Simulink for can use any other circuit simulation tool but according to me, comsol multiphysics is one of the best ways to simulate electrical circuits. the reason being you can couple electrical circuit modules with other physics so that you can be done multiphysics problems that involve electrical circuit as well as FEM simulation together.
You can check my other AC DC module blog posts.
Setting up the electrical circuit (cir) ac dc model
To simulate the electrical circuits in comsol multiphysics you need to import AC DC module CIR that is the electrical circuit. you can add a 0D component and then set up the Physics to set up the Physics for your model.
Adding electrical components in COMSOL Multiphysics
The next step is to add different components in your electric circuit depending on your model and the number of nodes. To set up the circuit you need to add various components in the comsol multiphysics electrical circuit module other you can do it manually or you can imports a .spice circuit which can then configure inside COMSOL.
Add Study for electrical circuit simulation
After you set up the circuit you need to add study in a circuit. Note that in this simulation you don't need to mesh because there is no geometry involved. you can add a time-dependent study as shown in the image.
Add voltage source (ac or dc ) in comsol
If you want to add a voltage source let say, want to change to an AC sin source we can do that by clicking on the voltage source and then changing the parameters as shown in the image or in the video tutorial.
Result Plot in COMSOL electrical circuit simulation
To plot your result the best way is to create a 1D plot group and inside that you can create a global plot insert the Global plot you can easily plot your current voltage or whatever parameter you want to plot.
Tutorial Video
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Electrical circuit simulation result plot in COMSOL
The plot shows the input voltage source showing that the input is an AC source which is sine curve in nature.
Final half wave rectifier in COMSOL Multiphysics result
This is the final output of our tutorial so we can see that the blue line represents the input AC wave and the green is the rectified half-wave output.
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