PMSM Drive system Linearization

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Ali Bashabsheh
Ali Bashabsheh 2018-8-30
评论： Mudit Verma 2020-8-30
Hello Everybody
I am working on a MATLAB Simulink model for PMSM drive system, my system is controlling the motor's torque. I am facing a problem in linearizing the plant. I have tried to tune PID controller parameters, but the plant cannot be linearized. I don't understand the problem enough to fix it effectively, hereby I tried a lot of things randomly but never worked, in the attached file I tried some manual tuning method but it doesn't result in good dynamic response because a huge overshoot is observed in the output currents and torque :(
Can anyone help in this regard. The Simulink file is attached.
Thanks in advance
Ali Bashabsheh

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Arkadiy Turevskiy
Arkadiy Turevskiy 2018-10-29
Hi there,
Linearization does not work for models with discontinuities such as PWM and power semiconductors.
There are a couple of techniques we recommend:
1. Do ac sweep (frequency response estimation) and use that frequency response for tuning - see this example .
2. Use PID Autotuner block to tune PID Controller for you- see this example .
Hope this helps.
Arkadiy
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Mudit Verma
Mudit Verma 2020-8-30
Autotuner not working in my model there is no PId gains showing they are showning 0 and only frequencies are showing in display block

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