Simscape "Boost Converter" not functioning as expected.

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Jung Sunghun
Jung Sunghun 2021 年 12 月 16 日
コメント済み: ayoub reffai 2022 年 5 月 12 日 7:31
Hello all,
I am currently trying to utilize a Simscape Boost Converter block to step-up incoming voltage from PV modules having about 7.2V to 16.8V to powerup BLDC motors as shown in the attached picture.
However, whatever I try with various parameter values for the "Boost Converter" block and "DC-DC Voltage Controller" block, both incoming voltage and the outgoing voltage are same to be around 7.2V. I wonder what I am doing wrong in here.
PS: Please refer the following link for the related information.
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ayoub reffai
ayoub reffai 2022 年 5 月 12 日 7:31
hello
can you send this model please

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Steve Miller
Steve Miller 2021 年 12 月 17 日
As recommended by Antonio above:
  1. Open-loop analysis with stand-alone boost converter - use an ideal voltage source with value an average of PV voltage and a resistor as output with value R = V*V/P, where V is the expected voltage your motor should work at and P is the rated power
  2. Tweaking parameters - the boost converter is notorious to be challenging to control in pure voltage mode since the designer must reduce the destabilizing effect of the half-plane zero. You can follow this design procedure.
  3. Control design - did you know that you can design your controller directly on the switch-mode converter? This is made possible thanks to a systematic procedure based on Frequency Response Estimation and tools that leverage on the classic control theory available with Simulink Control Design. If you need more info, I advice you to look into this training course: Power Electronics Control Design with Simulink and Simscape.
  4. Once the voltage-mode-controlled boost converter is fully tested as standalone, you may replace the ideal voltage source with your PV panel model and the resistive load with your motor.
--Steve
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Jung Sunghun
Jung Sunghun 2021 年 12 月 22 日
Finally, I decided to limit the power output to be 170W and it solved every problem.
Thank you very much.

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