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Field Oriented Control of Induction Motors

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  • čas přidán 22. 09. 2023
  • In this video I talk about field oriented control (FOC) of induction motors.
    0:00: Intro
    0:46: Video topics
    0:55: How do induction motors work?
    2:19: Open-loop Voltage over frequency control
    3:50: Closed-loop Voltage over frequency control
    5:15: Voltage over frequency VS Field oriented control
    6:38: Field oriented control of induction motors
    9:50: Maximum torque per ampere (MTPA)
    There's a lot of material online explaining about FOC when talking about permanent magnet motors, but I barely found any intuitive explanations regarding FOC of induction motors.
    This video aims to fill that hole.

Komentáře • 28

  • @6earth6
    @6earth6 Před 4 měsíci +2

    It's like I see a summary of my senior year project back in the university 3 years ago. Back then we don't have clear explanation of this control method we only have to read though IEEE and textbooks to understand these things. Your video will be such a great help to fellows who wants to learn more about motor control methods.

  • @adnaneakk1068
    @adnaneakk1068 Před 6 měsíci +3

    im realy astonished on how much information i got from your video. i can tell that you have a Phd.
    -You explane very well from step A to Z
    -You compare and tell why method X is better than method Y
    -You update the information by actualy looking at whats new (what researchers have found)
    -in 12 minutes you saved me the time of maybe 12 hours or more !
    Most importante thing is you SIMULATE what you SAY
    Thank you man i realy do appreciate the work you did.

    • @adnaneakk1068
      @adnaneakk1068 Před 6 měsíci

      and i have a simple question :
      why we call that 8:44 (26) equation as a filter ? what does it filter ?

    • @matanpazi3777
      @matanpazi3777  Před 6 měsíci

      Thanks! I appreciate the kind words. I working on keeping the videos coming.
      I definitely don't have a PhD :), just a BSc majoring in control engineering and curiosity.

    • @matanpazi3777
      @matanpazi3777  Před 6 měsíci +1

      Once you inject Id, the rotor's magnetic flux won't change immediately, it'll change based on the motor parameters, kind of like a 1st order low pass filter.

  • @HoneyPotJnr.
    @HoneyPotJnr. Před 10 měsíci +4

    I would like to see more videos like this. As someone that works in the controls industry but is not a researcher its often difficult to find more accessible explinations for things. It would be great to see topics such as the effect of modulation depth or flat top modulation vs SVM. I've always found it impossible to find information on these topics without resorting to reading university papers.

    • @matanpazi3777
      @matanpazi3777  Před 10 měsíci +4

      Thanks, same here, I also work in the controls industry.
      I'm planning to make a video about field weakening soon, I'll think about making one about different modulation techniques, thanks for the idea.

  • @michawojcieszek1316
    @michawojcieszek1316 Před 6 měsíci

    really great helpful video, seeing more videos like this would be awesome

  • @HoneyPotJnr.
    @HoneyPotJnr. Před 10 měsíci +2

    This is a great video, thanks.

  • @Alireza-mf1lz
    @Alireza-mf1lz Před 7 měsíci

    Very informative and useful. Nice work. 👏 👏 👏

  • @aboodsawalha3531
    @aboodsawalha3531 Před 9 měsíci +1

    Thank you for your efforts !

  • @OrionFH
    @OrionFH Před 8 měsíci

    Most important factor is rotor and stator winding temperature, these might be estimated well enough using a good thermal model. That improves accuracy dramatically, provided the thermal model is good

  • @marisolvalencia2589
    @marisolvalencia2589 Před měsícem

    very nice explanation

  • @nguyenthanh1485
    @nguyenthanh1485 Před 7 měsíci +1

    I have some questions:
    1. How to align iD with rotor's magnetic flux (alpha axis) ? (With BLDC, PMSM I just simply let the Rotor return to Phase A by enabling HA = 1, HB = HC = 0)
    2. At 8:45, (26) how to determine S ? Is this equation belong to laplace domain ?
    3. Tr is sampling rate and Lm is inductance of 1 coil (from Line to N or Line to Line) , right ?

    • @adnaneakk1068
      @adnaneakk1068 Před 6 měsíci

      About your Second Question : if i understand correctly that was in laplace domaine so you need to inverse it to obtain => Ids * (Lm/tr) * exp(t/Tr)

  • @fablearchitect7645
    @fablearchitect7645 Před 2 měsíci

    There is also the issue of axis decoupling. The problem is that the d and q axis do not operate independent of each other. There are terms in each of the dq axis ODEs that cross corelate. This means that the d control loop will effect the q control loop and vice versa. One must use feedforward control to decouple these terms so that each control loop can act independent of each other.

  • @thedeathengineer
    @thedeathengineer Před 10 měsíci +2

    Nice!

  • @AlonSmil
    @AlonSmil Před 10 měsíci +1

    Woww thanks man 🙂🙂🙂

  • @robertpeters9438
    @robertpeters9438 Před 4 měsíci

    It would be interesting to see how to control a doubly fed AC motor for position and variable speed. I understand it is related to controlling phase and frequency of one or both feeds.

    • @LamantinoElettronico
      @LamantinoElettronico Před 3 měsíci

      Probably it would be very similar to controlling a pmsm, because if the machine is doubly fed it means there is a constant rotor field and so it is synchronous

  • @DavidMolony
    @DavidMolony Před 10 dny

    Could you share what paper you're referencing at 10:55 (the bit about MTPA) please?

    • @matanpazi3777
      @matanpazi3777  Před 9 dny

      You can see the paper title at 10:46, here's a link to the paper:
      core.ac.uk/download/pdf/229175724.pdf

  • @cesargrimm
    @cesargrimm Před 2 měsíci

    is it me or is the current in the squirrel cage moving in the wrong direction? at 1:49

  • @srirammech100
    @srirammech100 Před 5 měsíci

    Can please you put video for foc Pmsm also ?

  • @alquz3a92
    @alquz3a92 Před 3 měsíci

    Great video, could you please put names and authors of the reference papers in the article

    • @matanpazi3777
      @matanpazi3777  Před 3 měsíci

      Thanks.
      I mentioned the sources in the video itself in red text.
      In the future I'll simply add links to the sources in the description.

  • @paulz8750
    @paulz8750 Před 6 měsíci

    He said at the beginning, he'd keep the equations to a minimum. 🤣
    Not long after that, my brain went into overload, short circuited & blew a phase.