Non-constant Torque issue in FOC algorithm (Simulink)

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jefazo jefazo 2020-4-16

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https://ww2.mathworks.cn/matlabcentral/answers/518538-non-constant-torque-issue-in-foc-algorithm-simulink

评论： jefazo jefazo 2020-4-21

Hi everyone,

I am trying to develop an FOC algorithm in Simulink (see image attached) but I am having extrange results in my simulation. My torque is not constant, when it should, but varying periodically (see image attached), when it should be constant at 2 Nm. Also the scope for my q-axis current my probe is giving me a strange graph (see image attached) I can't even make sense of. Please if anyone could help me I would really appreciate it since I have no clue what is going on. I don't know if it could be the values of my PI regulator but I have already tried all sorts of values and have no idea what else I can do. Please could someone help me out ?

P.S. Simulink file attached below.

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jefazo jefazo 2020-4-20

Does anyone know why my model is't working ?

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Answer 1

jefazo jefazo 2020-4-21

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https://ww2.mathworks.cn/matlabcentral/answers/518538-non-constant-torque-issue-in-foc-algorithm-simulink#answer_427419

Hi does anyone know what is wrong ? Is there something I need to further clarify ? I have beent trying to tune PI values but nothing has improved. I have tried playing around with the motor and nothing either. I thought it would simple to implement since it's basically linking blocks together. I hope you are just not answering because they genuily don't know the answer but if there is another reason nobody is replying please let me know because I really need to do what I am doing wrong. Thanks.

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jefazo jefazo 2020-4-21

Hi does anyone know what is wrong ? Is there something I need to further clarify ? I have beent trying to tune PI values but nothing has improved. I have tried playing around with the motor and nothing either. I thought it would simple to implement since it's basically linking blocks together. I hope you are just not answering because they genuily don't know the answer but if there is another reason nobody is replying please let me know because I really need to do what I am doing wrong. Thanks.

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