Mr. Dave , I'm totally agree with you I did graduate in physics and I´m teaching, how ac drive runs an induction motor for 25 years at YASKAWA , but I' m a mechanical technician too, and all this disciplines I use to teaching costumers, your class it's a master class thx for that , I fell like a young boy now , well done Dave
there is an interesting topic which I had reserched. I considered the switching frequency as an additional time constant within the control plant. The time constant of the motor was more than 10 times bigger than the time delay introduced by the pwm switching frequency. Normally we would neglect that pwm time delay but....I had reserched that influence of switching frequeny on the controller within FOC. I used pole-zero compensation to calculate the controller gains. I used PT1 pkant to represent that pwm tike delay. Result was that the PI controller which does not have a third zero can not compensate for that pwm time delay so there was always an overshoot or a super slow pi controller without much dynamic in the inner current loop, the Iq loop. So I used an inner PID controller et voila, extreamly fast in response to torque changes without any overshoot. I found it extreamly useful in current motor control of big high torque PMSM and at low pwm frequencies at and below of 20kHz.
Great Video, Thanks Guru. I understand the Ka, Kb parameter identified from R&L but how this is linked in a digital PI . how to get those values for a Zero cancellation digital PI.
1:17:40 Question, are the peak values of the three-phase current always the same size or do these values vary with respect to each other during the control by the foe algorithm?
I love these videos! Thank you for them. I'm trying to figure out how port my Simulink models into HDL code so that I can implement this on an FPGA device. Does anyone know how to do this?
There are tutorials on mathworks website on how to do it, there's something called simulink hdl coder which does this, but i guess it only works on Spartan fpga devices
I bought brand new vacuum cleaner on yearly fair, under price. So i went home and figured device turns off after few seconds. Motor is ok, but control is bad, 8-pin blank chip dead ( pin 8 connected to A1 triac and i dont know marking) . Now iam watching this ! I miss my study times... Very nice video !
Excellent video. Very very informational and definitely something I was looking for. One doubt I have over what he says is that the motor goes faster as the current increases. I am not sure about that: yes the torque should increase, but the speed should depend on the frequency in my opinion
I agree, the amplitude would have to do with the amplitude of the torque, and the the frequency has to do with the speed. I believe his statements are incorrect in this regard.
Yea I believe that's a mistake as well since the torque will increase as the Iq current increases. The speed of the rotor isn't proportional to frequency though it's proportional to the voltage amplitude of the motor. This is why the Kv terms of most motors are listed since they are in units of angular speed per volt (e.g., RPM/Volt). Also, I think Mantis might be onto the right idea. The motor is loaded so much the speed gets reduced and as the torque increases to overcome the load it will speed up.
Good afternoon! Vector control theory says that the resulting stator field vector must be kept perpendicular to the rotor magnet. If this is one magnet with two poles, then it is not difficult to imagine and understand. But in life we have a lot of magnets. For example, there can be 12 of them on a scooter motor wheel, and the rotor is located outside the stator. How to present this corner there? How is the magnetic field located?
Good presentation, A question is current loop tuning how we will set the R/L Zero , Kb gain value in digital control , how it depends on the sampling frequency .
Hi, for questions regarding specific design advice, check out this E2E forum where you can search questions or ask the experts: e2e.ti.com/support/applications/motor_drivers/
Isn't there a trick to locate the differentiator to some other point in the block diagram so that the differentiator does not put out an impulse when set point is changed
As far as phase distortions, when I studied DSP we played around with more than just the standard analog filters. Is that an approach that is used in control design? My brain always goes straight to audio whenever filters are brought up. What about high order IIR filters? Is that something that is avoided due to delay and complexity?
Somewhat frustrating. The audience participation can't be heard without a microphone. You might say there is no audio feedback from the listeners perspective. Thumbs up anyway.
Well, it's also correct, tfd.com/z says it's th B.E. pronunciation. Of course it's also useful in speech to distinguish it from the letter C. N.B.: The same holds for 'process' he admonished Richard for. Obviously Richard is from England, and he's just teasing him.
I would have passed control system theory with an A if the lecturer taught like this. This man is a great engineer...and also a presenter!
I thought I will get A till I saw the question paper.
I absolutely love this guy's teaching style. I wonder if he's still with Texas Instruments in 2023.
Thanks for the upload TI!
Excellent presentation!
Thank you.
Thank you for this awesome experience. I am foreigner and always wanted to experience how in other countries they explain this things !
great vidéo Mr .
Mr. Dave , I'm totally agree with you I did graduate in physics and I´m teaching, how ac drive runs an induction motor for 25 years at YASKAWA , but I' m a mechanical technician too, and all this disciplines I use to teaching costumers, your class it's a master class thx for that , I fell like a young boy now , well done Dave
Like a motor control bible. Excellent work 👍
13.35 I understand his feeling when I learnt control system undergrad class in 80'. The same puzzle came to mind.
there is an interesting topic which I had reserched. I considered the switching frequency as an additional time constant within the control plant. The time constant of the motor was more than 10 times bigger than the time delay introduced by the pwm switching frequency. Normally we would neglect that pwm time delay but....I had reserched that influence of switching frequeny on the controller within FOC. I used pole-zero compensation to calculate the controller gains. I used PT1 pkant to represent that pwm tike delay. Result was that the PI controller which does not have a third zero can not compensate for that pwm time delay so there was always an overshoot or a super slow pi controller without much dynamic in the inner current loop, the Iq loop. So I used an inner PID controller et voila, extreamly fast in response to torque changes without any overshoot. I found it extreamly useful in current motor control of big high torque PMSM and at low pwm frequencies at and below of 20kHz.
Interesting didactic and really enjoyable speech!
finally i understand pid's a little more. thank you
Amazing Class
I am from Germany and we actually have two different words for control :D
Steuerung - Control with no feedback
Regelung - Control with feedback
Very good explanations, thank you!
Thanks very much!
Great Video, Thanks Guru. I understand the Ka, Kb parameter identified from R&L but how this is linked in a digital PI .
The teacher is freaking awesome
Great Video, Thanks Guru. I understand the Ka, Kb parameter identified from R&L but how this is linked in a digital PI . how to get those values for a Zero cancellation digital PI.
Really great thanks so much
Really nice lecture
thank you very much, it's helps me a lot
The best video.
1:17:40 Question, are the peak values of the three-phase current always the same size or do these values vary with respect to each other during the control by the foe algorithm?
Thank you Sir. I am a fan your teaching... sivarajan
Of your teaching..
Thank you
Could you tell me how to get in touch with the teacher?
I love these videos! Thank you for them. I'm trying to figure out how port my Simulink models into HDL code so that I can implement this on an FPGA device. Does anyone know how to do this?
There are tutorials on mathworks website on how to do it, there's something called simulink hdl coder which does this, but i guess it only works on Spartan fpga devices
I bought brand new vacuum cleaner on yearly fair, under price. So i went home and figured device turns off after few seconds. Motor is ok, but control is bad, 8-pin blank chip dead ( pin 8 connected to A1 triac and i dont know marking) .
Now iam watching this ! I miss my study times...
Very nice video !
Excellent video. Very very informational and definitely something I was looking for.
One doubt I have over what he says is that the motor goes faster as the current increases. I am not sure about that: yes the torque should increase, but the speed should depend on the frequency in my opinion
Purple Spark ⚡️ Perhaps he meant that a motor under load goes faster
I agree, the amplitude would have to do with the amplitude of the torque, and the the frequency has to do with the speed. I believe his statements are incorrect in this regard.
notice that in the two diagrams, the one on the left speeds up when the rotor on the right speeds up.
Yea I believe that's a mistake as well since the torque will increase as the Iq current increases. The speed of the rotor isn't proportional to frequency though it's proportional to the voltage amplitude of the motor. This is why the Kv terms of most motors are listed since they are in units of angular speed per volt (e.g., RPM/Volt).
Also, I think Mantis might be onto the right idea. The motor is loaded so much the speed gets reduced and as the torque increases to overcome the load it will speed up.
Good afternoon! Vector control theory says that the resulting stator field vector must be kept perpendicular to the rotor magnet. If this is one magnet with two poles, then it is not difficult to imagine and understand. But in life we have a lot of magnets. For example, there can be 12 of them on a scooter motor wheel, and the rotor is located outside the stator. How to present this corner there? How is the magnetic field located?
Where can we get the slides?
Can I get the link of the last video of this series which focuses on implementation with registers?
Good presentation, A question is current loop tuning how we will set the R/L Zero , Kb gain value in digital control , how it depends on the sampling frequency .
Hi, for questions regarding specific design advice, check out this E2E forum where you can search questions or ask the experts: e2e.ti.com/support/applications/motor_drivers/
Thank you , I found it from the TI forum e2e.ti.com/support/microcontrollers/c2000/f/902/t/312133
Isn't there a trick to locate the differentiator to some other point in the block diagram so that the differentiator does not put out an impulse when set point is changed
What happend on day 1 on the seminar
In 38:42 minutes you are giving your website to ınderstand mathematical background. Howeer I can reach it. Could you please share a link.
As far as phase distortions, when I studied DSP we played around with more than just the standard analog filters. Is that an approach that is used in control design? My brain always goes straight to audio whenever filters are brought up. What about high order IIR filters? Is that something that is avoided due to delay and complexity?
I thought he explained why you did not want high order filters. It introduces more phase lag. Bigger problem for the higher frequencies.
does anybody know if P at 43:32 refers to the number of poles exactly or does he mean pole pairs?
Motor Control Seminar - Richard Poley & Dave Wilson, Texas Instruments: th-cam.com/play/PLuUNUe8EVqlkaAtIzzdF7KUDvQIJ4KM_0.html
anyone found the blog?
Is the Richard video (previous presentation) available on youtube? What's the name?
th-cam.com/video/Kr_wmPBUsyY/w-d-xo.html this one
hahaha!!! lol
I don't think that this could be stated more elegantly! Manager: uneducated observer!!! :D
👍👍👍❤️
I recommend watching it at 1.25 speed
atleast upto the end of first question
what kind of component were used to cotrol motor in the early 1900s or late 1800s?
Somewhat frustrating. The audience participation can't be heard without a microphone. You might say there is no audio feedback from the listeners perspective. Thumbs up anyway.
what do you think about the wire attached on her dress?
+Tulak Adik u wot m8???
+CaptainAthiest ?
`
Motor Control
Nearly every electronic problem can be solved with duct tape and a Schmitt trigger...
Tried this on my Air traffic control console.
It works, thanks for the tip.
I can make this motor run.. just give me some duct tape, fishing line... and a brushless motor controller 😎
Where is the blog now?
Hi Zhitai-- you can read the blog here: e2e.ti.com/blogs_/b/motordrivecontrol/archive/2014/02/21/teaching-old-motors-new-tricks
Great! Really excellent materials for newbies like me!
@@TexasInstrumentsThis link is not available. Please share the updated link
Sorry, but zed-transform sounds much better to me :D
Well, it's also correct, tfd.com/z says it's th B.E. pronunciation.
Of course it's also useful in speech to distinguish it from the letter C.
N.B.: The same holds for 'process' he admonished Richard for. Obviously Richard is from England, and he's just teasing him.
Never heard it even once until my second run at college, and then it seemed like everyone used it. I prefer NATO phonetic alphabet.
5:25 How self-absorbed do you have to be to believe that you don't speak with an accent?
crumbs
You must forgive his pronunciation, he's not English.
Soup
Which L is he talking about? My design software has four L values: Ld, Lq, L self inductance and L mutual inductance.
Im guessing Ls in an idealized world
An American correcting English speakers on pronunciation is a bad start.