Field-Weakening Control (with MTPA) of PMSM

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Michael König
Michael König 2021-10-8
编辑： Raghunath Rachabattuni 2023-6-30
Hello,
I would like to plot the MTPA curve in Matlab. For this I would need the code.
Has anyone of you already plotted this curve?
Many thanks in advance!
Greeting,
Michael

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回答（2 个）

Dakai Hu
Dakai Hu 2022-5-5
Hi Michael,
Are you referring to the MTPA trajectories based on fixed PMSM parameters ? If so, we now have a block in Motor Control Blockset named "MTPA Control Reference" that will generate the MTPA trajectories based on your motor's parameters. See the documentation for that block below:
https://www.mathworks.com/help/releases/R2022a/mcb/ref/mtpacontrolreference.html
If you are looking at plotting MTPA trajetories based on measured nonlinear torque/flux linkage tables, I could possibly help you come up with some MATLAB scripts once you are able to show me some data.
Raghunath Rachabattuni
编辑：Raghunath Rachabattuni 2023-6-30
Hi
You can refer to the following link to know the the principles behind the MTPA curve of a PMSM, and find how to plot them.
https://in.mathworks.com/help/mcb/gs/pmsm-constraint-curves-and-their-application.html
The link shows the equations for MTPA curves with linear lumped parameters for motor. It explains about all the characteristic curves of a PMSM too.
For non-linear parameters (for motors which saturate their core under heavy current operation), further down the page in the link, a block LUT based PMSM Control Reference (Generate lookup-table-based control reference currents for field-oriented control of permanent magnet synchronous motor - Simulink - MathWorks India) is shown, and it creates the MTPA curve based on the non-linear characterization data of the motor.
Hope this helps.

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