Maximum Torque per Ampere Control Logic

I have an m file creating MTPA (Maximum Torque Per Ampere) curve. In simulink model I have a constantly changing input that needs to select the data according to the curve. But I haven't seen any possible way to do this, please help me...

Answer 1

[Mischa Kim]

Sreerag, have you looked into lookup tables?

[Sreerag Kunnathu Sugathan]

I have. But the problem is I haven't seen any way to incorporate the m file into the look up table. I am new to this, so please help me out

[Mischa Kim]

Of course, if you already have an m-file that creates the curve (and if that's all you need) you can use the function itself as the lookup table. From the Simulink library "User-Defined Functions" pick a MATLAB function block (in earlier MATLAB releases the block used to be called Embedded MATLAB function), open it and insert the MATLAB code. E.g.

 function out = myLookup(in)
    out = sin(in);
 end

[Sreerag Kunnathu Sugathan]

But still there is a problem. I have the m file that creates the curve. I need to get the y axis data from the curve as output with respect to the input data. Is that possible??

[Mischa Kim]

Sure, see the example above. in would be your input value ( x ), the sine is the curve (replace with your curve), out is the corresponding output value ( y ). For each input value you get one corresponding output value, continuously changing the input will result in the corresponding output signal based on the curve.

And, of course, the curve does not need to be a nice, smooth one, as the sine above. That is, you can also, e.g., if-else or switch commands to construct the curve.

Answer 2

[zhenyu jia]

hello, could you send me the m file? thank you very much!