How a VFD or variable frequency drive works - Technical animation
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- čas přidán 28. 06. 2024
- Describes the functioning of VFD or variable frequency drive. Other names for this are frequency converter, AC drive converter, etc.
- Comments are welcome!
From the content:
0:00 Introduction
0:42 Block diagramm of its main componentes and their function
1:16 Building the output signal by PWM
1:32 Building a 3 phase signal
1:53 Controlling the torque
1:20 Controlling the speed
2:19 Parameter Boost and ramp
3:05 Technical implementation of the component DC/AC converter
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Can't expect more than this. Very simple and very clear. Thanks guys.
Hope you like our other videos also :-)
Danke .
Endlich habe ich es verstanden.
Super video.
Incredible clear!
thanks for this comment
good clarification
We Call these Inverter drives in the UK usually abbreviated to Inverter . I know I used to sell and install them and DC drives for a major manufacturer
What a to the point and effective explanation of a complex process. Thank you and well done.
Thanks
your all video lectures are very good for students , easy to understand and got to the electrical knowledge so, thank you so much.
Thank you friend
WOW! Nice video. It also applies to our products.
hi - thanks you like our video
Please make more videos about motor, driving motors, and starting motor , please....... , i love this chanel so much
Very useful information, thank you, guys!
Hi friend thank you. You mean guys not gays :-))
Woow nice made!!
three motor coils (inductance) are connected to the component DC/AC converter. The voltage are pulses - but the current has a sine wave. The width of the voltage pulse determines the height of the current.
why Triac based dimmer or fan controller or Voltage dimmer not able to controll speed of submersible pump ( 220 V , 2.5A single Phase ) when i tried it to decrease its Speed by Varing its Potentiometers to lower , Motor become unstable and consuming More current then Usual ????????
@@omsingharjit Using Triacs for phase-cutting has no effect on the frequency. To control the speed of an induction motor you need a VFD.
czcams.com/video/QCQFFUdYF94/video.html
you just helped me with my senior year project thank you sir :)
next video will be about stepper motor :-)
Wow this video was amazingly clear. Thanks a lot!
thamks!!
Thanks good vedeo
Love it
Thank you!!
The music is too loud :-)
Never found a explanation in my Language, wich is that good
genau solche Kommentare brauche ich - danke!
Merci
THANKS FOR CLEAR UNDERSTAND
thanks for your comment
excellent work guys.hope your channel do more
one video per month - thanks for comment
thanks for the video good explanation and beautiful music but tell me what is the name of this music
this is a great video every second of it introduce great information thx
Thanks for your comment
really nice
thanks
thank you so much
thanks for comment
a Very nice video
thank you!
Good 👍
good
Simple and clear! Many thanks.
Thank you!
automotive system uses this as Hybrid sys.. boost is our main problem...good Job
thanks!
Thank you
thanks to you
Great...
thanks
Appreciated
thanks
is this the same technology used in inverter type air conditioner compressors?
crw7539 exactly.
in the section "dc to ac inverter" why the motor doesn't change the rotation direction even when the voltage is in negative signe
Can you do a video on explaining the whole reactance, frequency, and torque loss relationship in the motor while using a drive, either way nice video.
the next video will be about induction motor - hope, you like it.
awesome
thanks!
Tx
Rx
nice video. What is the software of the 3D simulation ?
I used Blender
exellent
Thank you!
Can you tell me what is the 3D simulation software you used? It is just beautiful. Thanks
I use Blender
Good explanation..
Does V/f also remains constant in vector controlled VFD ?
i.e. if a motor which is rated as 460V/60Hz is made to run at 30 Hz, does the voltage still remain 460V ?
No If it is below the supply voltage, it will prefer to decrease the output voltage. But if we go above the feeding frequency. The voltage will rise up to the supply voltage. This inverter will switch faster. This is my knowledge. Correct me if I'm wrong.
I need to understand parameters boost 2:20
nice
thanks
why Triac based dimmer or fan controller or Voltage dimmer not able to controll speed of submersible pump ( 220 V , 2.5A single Phase ) when i tried it to decrease its Speed by Varing its Potentiometers to lower , Motor become unstable and consuming More current then Usual ????????
Frequency doesnt change
Excellent. What is the difference between IGBT and IGCT? Thanks.
IGCT stands for integrated gate-commutated thyristor. It can be compared with a diode with a gate pin. But nowdays thyristors are replaced more and more by IGBT's.
Good video though.
Is there any power loss going through the VFD? Is there any power loss when changing ONLY the Hertz through a VFD?
If anyone can answer would be greatly appreciated!
I know they have a very good efficiency like 90% but I don't know what that means.
Very good lecture
Thks
Can u tell me about how vfd changes the direction of motor rotation.where phase reverse takes place?
WDYM how? 180 degree voltage phase shift corresponds to the reverse of synchronous magnetic field rotation direction and therefore induced torque.
@@samvenker3137 thank you Sam venker
where can i find info about VFDs i desperately need it for school
and what do you use to create the animations , please answer asap thanks
Hi - have a look on my site:
learnchannel-tv.com/drives/3-phase-inductance-motor/vfd/
Super
:-)
Please don't add external background music🎤🎼🎹🎶
Hi I will make a new vid about VFD. This one was one of my first vid. The recent videos are without loud music.
Sir yadi 3 phase ac line de tho
Good video just remove bg music
I can't remove the music, but I will make a new one vid about VFD.
Excellent. Normally, the switching is done by IGBT. So how many IGBTs are there.? Thanks.
Hi - 3:06 6 IGBT - 2 IGBT for each phase
@@learnchannel-TV Thanks for your kind reply.
@@cck0728 Subscribe my channel : - )
I have work on vfd.
Hello,
Can you kindly guide me that from any VFD which has output of 3-Phase 220V, can we handle speed control of 30V 6KW 3-Phase AC Motor with full torque?
Sorry - I don´t undertand your question
@@learnchannel-TV is there any VFD as per your knowledge, whoes output, we can able to select from 1VAC to 220VAC 3-phase? Let's say if we want to run a 30v AC 3-phase 4.6kw motor, is it possible?
😊
Hello ..i have 2.2kw,3000 rpm TEFC . How to know if the air velocity value or suitable for this motor. Can you help me with that???
When using on air handling you need to be careful because of the inverse square law ,
hi , can i know what size i should select if my motor plates is removed but its working now with three phases location ( 220 v ) and by check with clamp meter i found each phase withdraw 5.5 A ON LOAD , the seller told me its about 2200 watt . can you help what size of kw i should but to run it in 220v single phase ? i need to know whats my motor capacity also ?
3KW would be more like it...
Cant use a VFD for single phase motors. You need a special device for that.
A VFD also works the other way around,
I mean, if I have an electric generator that outputs 200Hz and I need 50Hz, will it work?
can I used VFD to increase the rated speed to +10% to 20% above rated speed using VFD. If can, how can I do that ?.. changing the base freq?
you can appy voltage with frequency over 50 or 60 hz (depends on the country). The problem is is the inductance resistance of the motor coils - the motor will loose torque.
i wan to know how to detect the minimum current and volt to make IGBT transistor strat working? For example IRG4BC10U
www.farnell.com/datasheets/140174.pdf
In your case you have to look for the Gate-to-Emitter Voltage. You are welcome.
thanks alot
The gate current is very small (often you can negly it). That´s why the name "insulated gate"
can we use VFD for DC motor??
no - for a DC-motor you need a H-bridge. I should make a vid about this.
THANK YOU FOR THIS VIDEO.I HAVE QUESTION REGARDING TO FREQUENCY.I HAVE BOUGHT MOTOR FROM USA WITH FRQUENCY 60HZ AND I WANT TO USE IT IN OMAN .BUT THE PROBLEM IS WE HAVE IN OMAN 50HZ AND I AFRAID TO RUN THIS MOTOR.DO YOU HAVE ANY ADVICE TO LET ME RUN THE MOTOR IN OMAN WITH 50HZ???
Using a VFD would be the solution. Nowadays they a re no more expensive.
@@learnchannel-TV
Thank you.
I have one doubt regarding to VFD solutions.. VFD drive motor in different frequency speed not to convert 60hz to 50 hz. I think frequency converter is a solutions to run motor 60Hz in 50hz
In Europe or India for example, the frequency of the supply voltage is 50 Hz. So for sure you can get a VFD to connect to 50 Hz. And set the parameter "edge frequency" to 60 Hz.
If the voltage is the same you can wire it up without a problem. Lower frequency means youll have a lower RPM. Just make sure you have 110V and not more. Pay attencion to the star/delta wiring as well. I suggest calling an electrician.
2:20-2:25. I feel that it would be more easier understood if it said " you would adjust the voltage TO ADAPT to the frequency when it accelerates and decelerates..", again, either way nice video.
I think you are right. Every constructive comment is a good comment.
This vid was for the engineer, not the tech side of it, although I did enjoy it.
others vids will come soon.
Great film. But why the terrible back ground sound? It's hard to focus
In my recent videos the background sound is only for introduction.
INCREASING FREQUENCY will increase reactance, without increasing voltage will DECREASE magnetic SATURATION, and torque!
correct
hello what vfd should i use for a 2.2 kw water pump? @t
as an amateur in this area I would remark that it depends on the manufacturer, I would suggest adding a factor of 1.3 or more to the vfd, take something like 2.5-3.0kW to tolerate an increased power demand from your pump
usually i use exactly same size of the motor, so far no problem. some of the drive i has installed still functioning after 2 years. I would prefer to use ABB
@@ronen124 thanks man
@@aztechd.i.y8470 thx, do you think Schneider is good
@@mikafong3212 Schneider, Danfoss, Vacon, ABB, so far this are the brands i have used. they all are OK. Only thing u have to take care is moisture and dust. This type condition can kill your inverter fast.
Noob question. According to efficiency curve IM is approximately 4% of slip for maximum efficiency. why not just lock the slip to that range so the frequency varies as load changes, then we just control the voltage and frequency automatically lock for 4% slip range so we have max efficiency and precise control? because V/f control not adapting to the load only good for constant load.
I think that in electric vehicles that use an induction motor, the VFD does control the slip to get max torque during acceleration and max efficiency during constant speed ride.
hello sir , can v get d. c variable speed drive mo tar Constanta torque than ac drive
The VFDs are today so powerful - they can perform a cascade control so that torque and speed are constant. But a three-phase asynchronous motor has many advantages to a DC motor: it is robust, high power and you do not need a power supply for rectification. Was this your question?
hello sir thanks for your reply, my quotation is dc Variable speed drive moter, has more torque than a c variable speed dive , i am spiral paper core maker i need constant high torque , can i can get from ac variable speed drive , starting torque is at very low revolution? i may have pleasure to receive your reply thanking you naresh joshi
With an VFD you can hold the motor current and the torque rather constant (the slip will be therefore also constant). But when the motor is in very slow motion, the fan wheel of the motor also rotates slow and the motor can heat up. Also the efficiency factor is not at its best. This is a problem of every motor.
Anyway it makes sense to implement full motor protection by thermal contacts.
many thanks for your technical clerificatation
many thanks
if my motor rotating very slow, wouldn't it get realy hot?
Yes - even if the motor current does not rise above its rated value, the motor may overheat because self-cooling (fan blades) at low speed does not work. So the motor should achieve its rated rpm as soon as possible.
Yes you need to use a Fvc motor or Force Vent Cooled basically it has a separate fan mounted on it
@@learnchannel-TV you should cool it with independent fan that is electronically controlled by heat
hey guys at 1:36, i got lost in the video didn't understand can some one explain it here! please
I want to make the following comparison: A coil in series smooths the current, just like a capacitor, parallel connected smooths the voltage. You´re welcome.
BROTHER, THE BACKGROUND MUSIC IS LOUDER THEN YOU
The power socket is 2 phase, not 3 phase!
Power socket for the VFD? You get VFD with single phase imput voltage and big ones with 3 phase input voltage
Now-a-days, we are observing that too many large VFD drives are blasting and everything is getting into smokes. This is happening with large size VFD drives. In several cases I could find that the electrical failure had been initiated from a blast at the DC-Filter/ or DC-bus in between the VFD Drive's Converter and Inverter section. Could there be a case of not maintaining enough electrical clearance? You can look at some of the pictures and case details as the section end of this
case-study ... ... ... enconengineers.in/problem-electrical-blast-vfd-harmonics-and-methodology-trouble-shooting-and-increasing-productivity
It could be due to Regenerative Voltage, more than than DC bus voltage, could be.
Video is good. But music is too much.
I know - new video about VFD without loud music is coming soon. :-)
I leave the sound off altogether.
Can anyone test this out and give feedback? Locate: 'Circuit Solver' by Phasor Systems on Google Play.
1:30
Music in the background confused the speak .🙉
Yes you are right. I will make a new video about VFD without loud music soon
Thanks but what an annoying music!
I will make a new vid about VFD without loud music - I promise :-)
@@learnchannel-TV Thanks
😂
kalengi.ir/motor-3-phas/
راه اندازی موتورهای سه فاز
Launch of three-phase motors
how to connect external potentiometer with drive.?
You should look the manual of your VFD. The pin assignment of the control ports varies from each VFD. Hope I could help you.
Mahesh r
Why does your CGI motor have ridiculous shaft run-out?
dude, I couldn't take my eyes of that shit :))))))
why is the music so loud????
In my recent videos, the music is quieter or turned off after the introduction.
why is the music so loud? so dumb
In such technical video no music is the best option.
Video is OK, but in one crucial moment when you explain loosing torque beause we do not have more voltage, music in background is so loud that is your speech and explanation useless. Best regards.
yes- this is one of my first videos. I will upload a new one about VFD without loud music. :-)
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10 Hz moto running time
Now time
what
Voltage?????
current? ?????
czcams.com/video/B-EhSZCbmuM/video.html
Diese Technik ist einfach genial und ermöglicht, alten Antrieben absolut neuen Aufgaben zu geben
Irritating music.
I know. New vid about VFD is in my order list.
Need to send that motor back. Shaft has runout.
:-)
Great explanation..
really nice
thanks
Great..
thanks!
1:30