I’m new to QSPICE and need to simulate a single-phase rectifier controlled by an SCR (thyristor). I want to be able to trigger it from 0º to 180º. I couldn’t find the component in question in the QSPICE library. How do I add an SCR to QSPICE? And how do I trigger it at a specific angle? I’d appreciate any help. I’m new and still learning.
Thyristor is not a standard symbol in SPICE and that why you couldn’t find the component in default SPICE library.
I created an ideal Thyristor symbol for Qspice (Thyristor-Ideal.qsym) in my Github, here is an example that build with this symbol. As a beginner, you can consider to play with ideal device as it easier. You can change “theta” value for firing angle. Let me know if anything unclear in this example.
example.fullbridge.Thyristor-Ideal.qsch (19.9 KB)
Or, here is behavorial and native model I collected from Gunthard Kraus spice library (they are subcircuit models). I have the library and subckt symbol in my Github Qspice/Symbols-KSKelvin/library-external/Thyristor-GunthardKraus, here is an example that build with this circuit. You need to download “Thyristor-native.txt” from Github to run this example.
example.fullbridge.thyristor.qsch (20.5 KB)
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This looks like it has exactly what I’m looking for my project. I’ve got years of experience in electronics, but not so much the simulation side though and I’m kinda lost on how to go about utilizing these files and custom symbols you’ve created. Could you suggest a good primer on how I can use the information from your github and get it into my system to use? I would be incredibly greatfull.
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In my Github link, navigate to Symbols-KSKelvin, scroll down to the bottom, and it will display the contents of README.md, explaining how to download the entire library and add it to Qspice. Is this what you are looking for?
I have an Entry guideline to help beginners understand the basic workflow of Qspice. You can find it on my GitHub, or here is a direct download link.
Qspice/Guideline/Qspice - Entry User Guide by KSKelvin.pdf at main · KSKelvin-Github/Qspice