Three-phase power representations: abc frame, αβ frame and dq frame
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- เผยแพร่เมื่อ 13 ก.พ. 2017
- An introduction on the Clarke and Park transformations; static and rotating frames of reference; motor and grid-tie control of voltage-sourced converters.
NOTICE: the video doesn't contain audio from 11:49 beyond indeed (that's not an upload error). I added the figures for the control part only after I recorded. Thus, no audio indeed, just the figures.
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Too Much Detailed practical approach in just 13 minutes !!!!
You truly are AMAZING !!!!!!
They didn't make any sense to me before this video, Thank you
awesome video! it helped me a lot to understand both the transformations in just 20 minutes (i have to re-watch some parts to get them)!
and keep doing your videos and English! I'm glad to see Brazilians talking about those topics, especially to a wider public.
I have watched this video at least three times now. Thanks again. It is really helpful in my studies. I have to use dq control all the time for generator, motor, and inverter models.
The best dq-transformation's explanation ever.
This has been incredibly beneficial. The mathematics was difficult to understand. I truly appreciate it. Thank you
Ótima explicação, Pedro! Parabéns pela aula e pela clareza de suas ideias!
it was extremely helpful in understanding clearly the concept of both transformations.. now they look so simple to me.. earlier i was struggling to make sense out of their complicated mathematics.
Thanks for the video!!! It really helped me with the project. The slides and explanation was really good. Hoping for more videos.
This is the most informative tutorial I've ever seen, much appreciated
This is so good! Thanks for the great explaination....!!!
This is the best explanation I have ever seen!
watched in a 0.75 playback speed and, anything
is clear, thankyou for this video
It's a difficult subject to understand, but you explain it very well, thank you
Parabéns pelo vídeo Pedro, ficou muito didático. Keep making videos like this one! Abraço
incredibly good explanation with animation
Very good. This is a good way to learn.Congrats :)
Explicação espetacular... parabéns...
Thank you for the very clear explanation.
Many thanks, so clearly explained, great professor
Awsome. ..i have been trying to understand how FOC works..Thanks a lot...Good job..
Very good explanation. Thank you!
Amazing work!!! Thanks a ton!
Great Video & Nice Explanation
Very educational and useful
Ótima explicação! Parabéns!
Gostei da explicação. Me auxiliou nos estudos. Parabéns, continue assim!
Amazing video , Excellent , Thank YOU
Though graphics are disturbing, eventually this gives clear idea...thank you
Fantastic job. Thank you!
I cannot thank you enough
Amazing video!
Very good video. Congrats man
Great explanation!
Great explanation✌thank you so much
Really nice explanations ! thank you !
good work and good knoledge
great work sir
Excellent video, thank you.
I can't seem to get the correct magnitude for the baby-blue vector v from the 3 phases. Shouldn't this just be the norm of the vector resulting from the vector sum of the 3-phases at a given angle?
No sound after 11:49, otherwise, a great video. Thanks!
Very good explanation ...
Muito legal o vídeo. Vê se você consegue me tirar uma dúvida que não acho em lugar nenhum: no referencial abc, a fase b está atrasada 120º da fase a, mas quando vai definir a transformada de Clarke a fase b é trocada de posição com a fase c. Sei que é possível manter a ordem original do referencial abc se orientar o eixo beta para baixo, o que dá a ele a característica de estar defasado -90º em relação ao eixo alpha. Não consigo encontrar em lugar algum o porquê dessa definição. Valeuu
Great work
Could you please tell me the software you have used to generate the 'GIFs' Clarke and Park transformations. I really like the way you did and I want use that software for my project. Thanks in advance
Great video! Thanks!
very informative, thank you
@Pedro Almeida what are the chances of you uploading the video with complete sound?
please do it, everyone is curious...
Thx for this Clearly explaned topic!
Thank you for you very helpful explanation. I noticed a typo at around the 11:15 mark. Your Park and inverse Park transforms should be flipped. You give Inverse Park first, but it is titled "Direct Park Transformation (alpha-beta to dq.)"
Again, thank you for this video. It was very helpful for me to visualize the significance and purpose of Clark and Park in an EE context.
many thanks, i will correct in futures videos!
yeah - a great help, thanks so much.
Very good . Thank you for making this video !
Pretty good explanation
If we add three signals(Va+Vb+Vc right part of screen)5:40 in every single part of time the result is 0. So how do we get resulting rotating vector v? ( from such thinking V should be equal 0, I miss the point)
Espectacular
thank u sir...explained so easily
@Pedro Almeida Starting from 5:03, I think you need to include the direction of the frame rotation. Assuming it is anti-clockwise, I believe you misplaced b and c phasors, correct me If ı am wrong.
Very very helpful
Very good video but at 11:31 you have mixed the direct park and the inverse park. You have them flipped
Big fat thank you!
Massa, ta bem didático.
In order to attend more people here I recommend to insert a subtitle in spanish, for example. And I assume it's easy for u as spanish apparently is the mother language in Brazil.
excellent
Does anyone know what program did he use to draw the vectors??? any suggeestions?
Hi, thank you for good explanation, I have a never-ending question, many people explains the conversion with Va Vb Vc, but in actual inverter system, we are measuring Ia Ib Ic with hall sensor or soemthing else, my curiosity is, should we convert Ia Ib and Ic into Va Vb Vc with R and L applied? please give me more understanding to get Vq in the end...
No! To properly control the motor (speed/torque), you only need to feedback Ia, Ib & Ic plus information on the rotor position (which can be given by a position sensor - encoder, resolver, etc. or even can be derived from the back emf of the motor). The stator voltages are actually what the inverter is outputting to the machine, since Va = ma*VDC and ma (the modulation index at phase a) is the control output of the feedback loop - given currents Ia, Ib, Ic and rotor position, your controllers calculate what the modulation index should be at each phase to achieve the desired speed/torque (R & L are actually encapsulated in the dynamic model of the machine for control purposes).
Muito bom!
thank you!!
Thanks for the Explanation, but there might be some misunderstandings because of the vectors sum in 5:24 which is not correct, V should be bigger than Va, please revise it in the next version
Great video!!
By the way, where did you got the animations?
i did most of them. some of them were made by a fellow professor (the phasor diagrams).
and some (such as the motor spining at the beggining) are from wikipedia
@@PedroAlmeida0 Hi Almeida, what software do you use to make animations? It looks so great !
thanks man
Muito bom!!!!
Mas já que o vídeo apresentou problema no áudio, faça um em português.
So the d-axis and q-axis is used because it is possible to regulate the signals with a PI controller. That is interesting.
You can choose for one of the above gifts
Thanks bro
what about the non-synchronous rotor speed case. the rotor flux to stator flux angle is confusing me when the rotor doesnt move at synchronous speed
There is not any flux made by the rotor, if it's angle shoudn't change regarded to the stators flux .Therefore "slip" (beetwen two axes ) must being present in assyncronous mode operation.
Awesome !!! In 11:16 it is sine man! not Sen...
:P
Can anyone recommend a great book that expaain in boring details the svpwm please
Hello Professor, these transformations are beautifully explained. Some matrix calculations include trigonometric functions. Good visualization.
I invite you to analyze - a new generation - four-phase, four-step, synchronous Brushless Hybrid Fast - Rotation Motor. All data is published on my website and finally "Zygmunt Kiliszewski" on You Tube.
Sincerely, Zygmunt Kiliszewski.
thanks
Great video bro, if you could improve the sound could be even better
Hero
Muchas gracias, de verdad es muy buena la explicación, las animaciones fueron mas faciles de entender que las explicaciones en los libros
neat
Thank you sir, may we have your slide
Can anyone test this out and give feedback? Bump into: 'Circuit Solver' by Phasor Systems on Google Play.
no audio
thx a lot, I have earned more knowledge by this video
Having problems with circuits? Try circuit solver Find: 'Circuit Solver' by Phasor Systems on Google Play.
but good video
Brasileiro falando inglês sempre soa parecido
please stop the video at 5:08. At that moment , va = 1 and vb=vc=-1/2. Their sum must be equal to zero , but if you check the vectors, their sum is not equal to zero.I really do not understand how this vectorial representation represents the graphic on the right . I have been thinking about this for a long time , every book tells this same story ,but i cannot find a logical explanation.
their vector sum is not zero. you are doing the sums of their modules (amplitudes). their vector sum equals the space vector v, which has the same direction at this instant as phase va, because theta=0. this means that at instant theta=0, the space vector is aligned with phase a.
i_s=ia+ib * e^(j120)+ ic * e^(j240) , if you make a definition like this, their vector sum is not zero, of course. But, there does not such a voltage or current exist at the stator. What really exists is 0=ia+ib+ic.Stop the video at 5:08,check the graph on the right, you can see their sum is zero. The sum of vectors on the left is not zero. So,the graph on the left is not same the graph on the right. I think, we are trying to create this i_s current at the stator, to control the torque(quadrature part of i_s) and flux(diret part of i_s).
@@agemennon so why math does not fit with the real world? The rotor is rotating, we know that so ther emust be a V vector. why on the time scale sum of all phases are giving zero not V?
I think you may be confused with a space vector. It is very different from just adding the three vectors' amplitudes together.
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hola
Make previous videos in English Prof.. (Power Conversion)
oh my god, pls use fucking subtitles thanks