awallich asked . 2021-09-06

Converting a SPICE subcircuit to Simscape component

Hi everyone,
 
I have a serious problem, which I cannot solve myself.
Task: I want to convert a SPICE subcircuit to a Simscape component using the matlab syntax "subcircuit2ssc(filename,target)" The SPICE subcircuit are only related to Inductors and mutual inductors.
SPICE-model:
.subckt Ckt_model_series 1 2 3 4 5 6
L1 1 4 3.93e-09
L2 2 5 5.35e-09
L3 3 6 5.39e-09
K12 L1 L2 0.38
K13 L1 L3 0.45
K23 L2 L3 0.19
.ends Ckt_model_series
 
Problem: After converting I get the following message in the .ssc file:
% Users should manually implement the following SPICE commands in order to
% achieve a complete implementation:
% ckt_model_series: K12 l1 l2 0.38
% ckt_model_series: K13 l1 l3 0.45
% ckt_model_series: K23 l2 l3 0.19
This basically means all three inductor coupling are not taken into consideration. According to this link my syntax should be right.
Question: Where is my mistake and how can I manually implement the SPICE commands afterwards? I need this solution for even bigger circuits ...

simscape , spice , simscape electrical ,

Expert Answer

Prashant Kumar answered . 2024-03-25 23:51:57

Could you please confirm which release you are using?
 
Support for the coupling factor component was added in R2019a, I believe. If you have access to that release or later, it should just work for you.
 
If you don't have access to that release, then the best solution is to write the relevant equations for yourself. For this simple case, I can give you an example. Basically, it just involves writing out the differential equations. Note that L1, L2 and L3 are variables representing the currents through those inductors, so I'm just writing something like v1 = L1*i1.der + k12*sqrt(L1*L2)*i2.der + etc.
component ckt_model_series
% ckt_model_series

    nodes
        node_1 = foundation.electrical.electrical; % node_1
        node_2 = foundation.electrical.electrical; % node_2
        node_3 = foundation.electrical.electrical; % node_3
        node_4 = foundation.electrical.electrical; % node_4
        node_5 = foundation.electrical.electrical; % node_5
        node_6 = foundation.electrical.electrical; % node_6
    end

    variables
        L1 = {value={0,'A'},priority=priority.none};
        L2 = {value={0,'A'},priority=priority.none};
        L3 = {value={0,'A'},priority=priority.none};
    end

    branches
        L1: node_1.i -> node_4.i;
        L2: node_2.i -> node_5.i;
        L3: node_3.i -> node_6.i;
    end

    equations
        value(node_1.v-node_4.v,'V') == 3.93e-09*value(L1.der,'A/s')+0.38*sqrt(3.93e-09*5.35e-09)*value(L2.der,'A/s')+0.45*sqrt( ...
            3.93e-09*5.39e-09)*value(L3.der,'A/s');
        value(node_2.v-node_5.v,'V') == 5.35e-09*value(L2.der,'A/s')+0.38*sqrt(5.35e-09*3.93e-09)*value(L1.der,'A/s')+0.19*sqrt( ...
            5.35e-09*5.39e-09)*value(L3.der,'A/s');
        value(node_3.v-node_6.v,'V') == 5.39e-09*value(L3.der,'A/s')+0.45*sqrt(5.39e-09*3.93e-09)*value(L1.der,'A/s')+0.19*sqrt( ...
            5.39e-09*5.35e-09)*value(L2.der,'A/s');
    end

end

 


Not satisfied with the answer ?? ASK NOW

Frequently Asked Questions

MATLAB offers tools for real-time AI applications, including Simulink for modeling and simulation. It can be used for developing algorithms and control systems for autonomous vehicles, robots, and other real-time AI systems.

MATLAB Online™ provides access to MATLAB® from your web browser. With MATLAB Online, your files are stored on MATLAB Drive™ and are available wherever you go. MATLAB Drive Connector synchronizes your files between your computers and MATLAB Online, providing offline access and eliminating the need to manually upload or download files. You can also run your files from the convenience of your smartphone or tablet by connecting to MathWorks® Cloud through the MATLAB Mobile™ app.

Yes, MATLAB provides tools and frameworks for deep learning, including the Deep Learning Toolbox. You can use MATLAB for tasks like building and training neural networks, image classification, and natural language processing.

MATLAB and Python are both popular choices for AI development. MATLAB is known for its ease of use in mathematical computations and its extensive toolbox for AI and machine learning. Python, on the other hand, has a vast ecosystem of libraries like TensorFlow and PyTorch. The choice depends on your preferences and project requirements.

You can find support, discussion forums, and a community of MATLAB users on the MATLAB website, Matlansolutions forums, and other AI-related online communities. Remember that MATLAB's capabilities in AI and machine learning continue to evolve, so staying updated with the latest features and resources is essential for effective AI development using MATLAB.

Without any hesitation the answer to this question is NO. The service we offer is 100% legal, legitimate and won't make you a cheater. Read and discover exactly what an essay writing service is and how when used correctly, is a valuable teaching aid and no more akin to cheating than a tutor's 'model essay' or the many published essay guides available from your local book shop. You should use the work as a reference and should not hand over the exact copy of it.

Matlabsolutions.com provides guaranteed satisfaction with a commitment to complete the work within time. Combined with our meticulous work ethics and extensive domain experience, We are the ideal partner for all your homework/assignment needs. We pledge to provide 24*7 support to dissolve all your academic doubts. We are composed of 300+ esteemed Matlab and other experts who have been empanelled after extensive research and quality check.

Matlabsolutions.com provides undivided attention to each Matlab assignment order with a methodical approach to solution. Our network span is not restricted to US, UK and Australia rather extends to countries like Singapore, Canada and UAE. Our Matlab assignment help services include Image Processing Assignments, Electrical Engineering Assignments, Matlab homework help, Matlab Research Paper help, Matlab Simulink help. Get your work done at the best price in industry.