Variable Speed Driver for Induction Motors - Constant V/Hz Control
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Hello everybody.
I am trying to implement what should be a "simple" control for induction motors. I attach the *.mdl file in case you want to take a look.
I am following the next scheme [1]:
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/285470/image.jpeg)
Instead of ωr in the second "sum" block, I am using ωr*.
I don't know why, when the speed approaches the reference, I get an oscillation that brings my model to instability. I find this very strange since I do not implement any transients or anything like that.
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/285471/image.jpeg)
Thank you all!
[1] Bose, Bimal K. 2002. “Modern Power Electronics and AC Drives.” Prentice-Hall. https://doi.org/10.1016/S0927-0248(96)00085-2.
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Sabin
2024-1-21
Simscape Electrical provides a block implementing Scalar Control:
For an example about how to use it to control the induction motor:
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