How a VFD or variable frequency drive works

How a VFD or variable frequency drive works - Technical animation

Рет қаралды 695,224

Күн бұрын

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
Our Engineering Tutorial Video Channel. Topics covered: Automation, Electrical, Robotics, Hydraulics, Pneumatics,
Our official website: learnchannel-TV.com
Facebook: / learnchannel-tvcom-174...
Contact: info@learnchannel-TV.com

Пікірлер: 221

@surajdasu0 7 жыл бұрын

Can't expect more than this. Very simple and very clear. Thanks guys.

@learnchannel-TV 7 жыл бұрын

Hope you like our other videos also :-)

@warmetechnik8299 4 жыл бұрын

Danke . Endlich habe ich es verstanden. Super video.

@sannmaung3673 4 жыл бұрын

your all video lectures are very good for students , easy to understand and got to the electrical knowledge so, thank you so much.

@learnchannel-TV 4 жыл бұрын

Thank you friend

@dogwalker666 5 жыл бұрын

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

@guiaufjf-gv5678 7 жыл бұрын

Incredible clear!

@learnchannel-TV 7 жыл бұрын

thanks for this comment

@eugeneleroux1842 Жыл бұрын

What a to the point and effective explanation of a complex process. Thank you and well done.

@learnchannel-TV Жыл бұрын

Thanks

@mykolasemenyuk1281 4 жыл бұрын

Very useful information, thank you, guys!

@learnchannel-TV 4 жыл бұрын

Hi friend thank you. You mean guys not gays :-))

@magnakeme7730 4 жыл бұрын

good clarification

@K4rha 7 жыл бұрын

Wow this video was amazingly clear. Thanks a lot!

@learnchannel-TV 7 жыл бұрын

thamks!!

@seablue1085 7 жыл бұрын

Please make more videos about motor, driving motors, and starting motor , please....... , i love this chanel so much

@invtelectric 5 жыл бұрын

WOW! Nice video. It also applies to our products.

@learnchannel-TV 5 жыл бұрын

hi - thanks you like our video

@mhndn2327 6 жыл бұрын

you just helped me with my senior year project thank you sir :)

@learnchannel-TV 6 жыл бұрын

next video will be about stepper motor :-)

@learnchannel-TV 6 жыл бұрын

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.

@omsingharjit 6 жыл бұрын

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 ????????

@learnchannel-TV 4 жыл бұрын

@@omsingharjit Using Triacs for phase-cutting has no effect on the frequency. To control the speed of an induction motor you need a VFD. kzfaq.info/get/bejne/h6mBeamGyb-qaWg.html

@manojillangasooriya3590 3 жыл бұрын

Love it

@daenenjurgen 3 жыл бұрын

Woow nice made!!

@omararibi5808 4 жыл бұрын

Thanks good vedeo

@yscbruno 4 жыл бұрын

Thank you!!

@learnchannel-TV 4 жыл бұрын

The music is too loud :-)

@killyourdarling9699 6 жыл бұрын

this is a great video every second of it introduce great information thx

@learnchannel-TV 6 жыл бұрын

Thanks for your comment

@samuelcherkos5562 6 жыл бұрын

THANKS FOR CLEAR UNDERSTAND

@learnchannel-TV 6 жыл бұрын

thanks for your comment

@milanpatel1802 7 жыл бұрын

excellent work guys.hope your channel do more

@learnchannel-TV 7 жыл бұрын

one video per month - thanks for comment

@dominikscherer1882 6 жыл бұрын

Never found a explanation in my Language, wich is that good

@learnchannel-TV 6 жыл бұрын

genau solche Kommentare brauche ich - danke!

@user-cz6ll4ow8r 3 жыл бұрын

Merci

@wisdom_wellness365 6 жыл бұрын

Simple and clear! Many thanks.

@learnchannel-TV 6 жыл бұрын

Thank you!

@TariqAlware 5 жыл бұрын

thank you so much

@learnchannel-TV 5 жыл бұрын

thanks for comment

@chagaarbellal4983 6 жыл бұрын

thanks for the video good explanation and beautiful music but tell me what is the name of this music

@kinda-vfd2996 5 жыл бұрын

really nice

@learnchannel-TV 5 жыл бұрын

thanks

@frecon4694 5 жыл бұрын

a Very nice video

@learnchannel-TV 5 жыл бұрын

thank you!

@welltekdiagnostics6835 6 жыл бұрын

automotive system uses this as Hybrid sys.. boost is our main problem...good Job

@learnchannel-TV 6 жыл бұрын

thanks!

@MR-nl8xr 7 жыл бұрын

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.

@learnchannel-TV 7 жыл бұрын

the next video will be about induction motor - hope, you like it.

@TechnoLogicalLOGIC19ccc 7 жыл бұрын

Great...

@learnchannel-TV 7 жыл бұрын

thanks

@elevatorsasansorler 6 жыл бұрын

good

@234dilligaf 6 жыл бұрын

Appreciated

@learnchannel-TV 6 жыл бұрын

thanks

@surendrakverma555 11 ай бұрын

Good 👍

@victorrinz3753 7 жыл бұрын

Thank you

@learnchannel-TV 7 жыл бұрын

thanks to you

@ranjanpal7217 3 жыл бұрын

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 ?

@epinefrin1425 2 жыл бұрын

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.

@arulvishwakarma007 7 жыл бұрын

awesome

@learnchannel-TV 7 жыл бұрын

thanks!

@saifurrahman7675 7 жыл бұрын

@gordionthrash 6 жыл бұрын

@ImronRosyadiOfficial Жыл бұрын

Can you tell me what is the 3D simulation software you used? It is just beautiful. Thanks

@learnchannel-TV Жыл бұрын

I use Blender

@talibhussain7878 7 жыл бұрын

exellent

@learnchannel-TV 7 жыл бұрын

Thank you!

@MrTrollBeast 6 жыл бұрын

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.

@noexistence9588 5 жыл бұрын

nice

@learnchannel-TV 5 жыл бұрын

thanks

@MrFruh 4 жыл бұрын

nice video. What is the software of the 3D simulation ?

@learnchannel-TV 4 жыл бұрын

I used Blender

@namenom9524 3 жыл бұрын

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

@learnchannel-TV 3 жыл бұрын

Hi - have a look on my site: learnchannel-tv.com/drives/3-phase-inductance-motor/vfd/

@user-zm1hp7pt5b 4 жыл бұрын

Very good lecture

@learnchannel-TV 4 жыл бұрын

Thks

@crw7539 4 жыл бұрын

is this the same technology used in inverter type air conditioner compressors?

@utubedestroysmytime 4 жыл бұрын

crw7539 exactly.

@autome4374 5 жыл бұрын

in the section "dc to ac inverter" why the motor doesn't change the rotation direction even when the voltage is in negative signe

@cck0728 4 жыл бұрын

Excellent. What is the difference between IGBT and IGCT? Thanks.

@learnchannel-TV 4 жыл бұрын

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.

@thghho 5 жыл бұрын

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?

@learnchannel-TV 5 жыл бұрын

Sorry - I don´t undertand your question

@thghho 5 жыл бұрын

@@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?

@anandprakashverma3858 6 жыл бұрын

Super

@learnchannel-TV 6 жыл бұрын

:-)

@zongkuizhang4648 6 жыл бұрын

😊

@henrybartlett1986 4 жыл бұрын

Good video though.

@robertomuhammad35 5 жыл бұрын

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 ?

@zanpekosak2383 5 жыл бұрын

3KW would be more like it...

@zanpekosak2383 5 жыл бұрын

Cant use a VFD for single phase motors. You need a special device for that.

@starking8821 5 жыл бұрын

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???

@dogwalker666 5 жыл бұрын

When using on air handling you need to be careful because of the inverse square law ,

@omsingharjit 6 жыл бұрын

@andrewng602 6 жыл бұрын

Frequency doesnt change

@pnagaraju4188 4 жыл бұрын

Can u tell me about how vfd changes the direction of motor rotation.where phase reverse takes place?

@samvenker3137 4 жыл бұрын

WDYM how? 180 degree voltage phase shift corresponds to the reverse of synchronous magnetic field rotation direction and therefore induced torque.

@pnagaraju4188 4 жыл бұрын

@@samvenker3137 thank you Sam venker

@sorinionescu8702 Жыл бұрын

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?

@afnanahmed5996 3 жыл бұрын

Good video just remove bg music

@learnchannel-TV 3 жыл бұрын

I can't remove the music, but I will make a new one vid about VFD.

@ajaygupta4966 4 жыл бұрын

Please don't add external background music🎤🎼🎹🎶

@learnchannel-TV 4 жыл бұрын

Hi I will make a new vid about VFD. This one was one of my first vid. The recent videos are without loud music.

@cck0728 4 жыл бұрын

Excellent. Normally, the switching is done by IGBT. So how many IGBTs are there.? Thanks.

@learnchannel-TV 4 жыл бұрын

Hi - 3:06 6 IGBT - 2 IGBT for each phase

@cck0728 4 жыл бұрын

@@learnchannel-TV Thanks for your kind reply.

@learnchannel-TV 4 жыл бұрын

@@cck0728 Subscribe my channel : - )

@norhamsiahzakariah7483 6 жыл бұрын

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?

@learnchannel-TV 6 жыл бұрын

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.

@MR-nl8xr 7 жыл бұрын

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.

@learnchannel-TV 7 жыл бұрын

I think you are right. Every constructive comment is a good comment.

@disasterq8569 3 жыл бұрын

I need to understand parameters boost 2:20

@technicalvideoshub4831 4 жыл бұрын

I have work on vfd.

@briarfox637 7 жыл бұрын

This vid was for the engineer, not the tech side of it, although I did enjoy it.

@learnchannel-TV 7 жыл бұрын

others vids will come soon.

@newman5754 7 жыл бұрын

i wan to know how to detect the minimum current and volt to make IGBT transistor strat working? For example IRG4BC10U

@learnchannel-TV 7 жыл бұрын

www.farnell.com/datasheets/140174.pdf In your case you have to look for the Gate-to-Emitter Voltage. You are welcome.

@newman5754 7 жыл бұрын

thanks alot

@learnchannel-TV 7 жыл бұрын

The gate current is very small (often you can negly it). That´s why the name "insulated gate"

@patrikpallos8438 5 жыл бұрын

INCREASING FREQUENCY will increase reactance, without increasing voltage will DECREASE magnetic SATURATION, and torque!

@learnchannel-TV 5 жыл бұрын

correct

@talalalrahbi9430 5 жыл бұрын

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???

@learnchannel-TV 5 жыл бұрын

Using a VFD would be the solution. Nowadays they a re no more expensive.

@talalalrahbi9430 5 жыл бұрын

@@learnchannel-TV Thank you.

@talalalrahbi9430 5 жыл бұрын

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

@learnchannel-TV 5 жыл бұрын

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.

@zanpekosak2383 5 жыл бұрын

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.

@AhmadAli-gj8ir 6 жыл бұрын

Sir yadi 3 phase ac line de tho

@kanaibanerjee5519 7 жыл бұрын

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

@githan100 6 жыл бұрын

It could be due to Regenerative Voltage, more than than DC bus voltage, could be.

@simonkiilerich430 6 жыл бұрын

Great film. But why the terrible back ground sound? It's hard to focus

@learnchannel-TV 6 жыл бұрын

In my recent videos the background sound is only for introduction.

@xerexs3420 Ай бұрын

BROTHER, THE BACKGROUND MUSIC IS LOUDER THEN YOU

@alimaster5292 7 жыл бұрын

hey guys at 1:36, i got lost in the video didn't understand can some one explain it here! please

@learnchannel-TV 7 жыл бұрын

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.

@mikafong3212 5 жыл бұрын

hello what vfd should i use for a 2.2 kw water pump? @t

@ronen124 5 жыл бұрын

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

@aztechd.i.y8470 5 жыл бұрын

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

@mikafong3212 5 жыл бұрын

@@ronen124 thanks man

@mikafong3212 5 жыл бұрын

@@aztechd.i.y8470 thx, do you think Schneider is good

@aztechd.i.y8470 5 жыл бұрын

@@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.

@nareshjoshi123 7 жыл бұрын

hello sir , can v get d. c variable speed drive mo tar Constanta torque than ac drive

@learnchannel-TV 7 жыл бұрын

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?

@nareshjoshi123 7 жыл бұрын

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

@learnchannel-TV 7 жыл бұрын

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.

@nareshjoshi123 7 жыл бұрын

many thanks for your technical clerificatation

@nareshjoshi123 6 жыл бұрын

many thanks

@phasorsystems6873 6 жыл бұрын

Can anyone test this out and give feedback? Locate: 'Circuit Solver' by Phasor Systems on Google Play.

@samueladitya1729 3 жыл бұрын

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.

@Tankwiper 2 жыл бұрын

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.

@abidsaleem9003 7 жыл бұрын

can we use VFD for DC motor??

@learnchannel-TV 7 жыл бұрын

no - for a DC-motor you need a H-bridge. I should make a vid about this.

@omarfatouh4731 5 жыл бұрын

The power socket is 2 phase, not 3 phase!

@learnchannel-TV 5 жыл бұрын

Power socket for the VFD? You get VFD with single phase imput voltage and big ones with 3 phase input voltage

@watts3694 7 жыл бұрын

1:30

@fazilelectronics3080 4 жыл бұрын

Video is good. But music is too much.

@learnchannel-TV 4 жыл бұрын

I know - new video about VFD without loud music is coming soon. :-)

@robertkat 4 жыл бұрын

I leave the sound off altogether.

@XRemixZilean 5 жыл бұрын

if my motor rotating very slow, wouldn't it get realy hot?

@learnchannel-TV 5 жыл бұрын

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.

@dogwalker666 5 жыл бұрын

Yes you need to use a Fvc motor or Force Vent Cooled basically it has a separate fan mounted on it

@ronen124 5 жыл бұрын

@@learnchannel-TV you should cool it with independent fan that is electronically controlled by heat

@cnweikensun1414 5 жыл бұрын

The main products are: high-performance vector inverter voltage: 110v, 220v, 380v, 460v, 575v, 660v six voltage levels; frequency: 0-650Hz adjustable; power: 0.4kw-630kw; Http://www.cnweiken.cn/en/list/38/ 1. Fan and pump special inverter 2, special inverter for injection molding machine 3, asynchronous servo saver 4, air compressor special inverter 5, high speed motor high frequency inverter 6, 690v medium voltage inverter 7, industrial frequency conversion energy-saving cabinet 8, air compressor functional power saving cabinet 9, photovoltaic solar inverter 10, can be customized mine explosion-proof and intrinsically safe inverter and power-saving special power-saving inverter control cabinet.

@user-sm9hh9hz8j 4 жыл бұрын

Music in the background confused the speak .🙉

@learnchannel-TV 4 жыл бұрын

Yes you are right. I will make a new video about VFD without loud music soon

@borishruskar5108 4 жыл бұрын

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.

@learnchannel-TV 4 жыл бұрын

yes- this is one of my first videos. I will upload a new one about VFD without loud music. :-)

@maikeltronic6061 2 жыл бұрын

kzfaq.info/get/bejne/eJN1m7aLqMjRpYE.html Diese Technik ist einfach genial und ermöglicht, alten Antrieben absolut neuen Aufgaben zu geben

@MattRandall160 4 жыл бұрын

why is the music so loud? so dumb

@dkverma67 4 жыл бұрын

In such technical video no music is the best option.

@thatguythatdoesstuff7448 6 жыл бұрын

Why does your CGI motor have ridiculous shaft run-out?

@iankleinschmidt712 6 жыл бұрын

dude, I couldn't take my eyes of that shit :))))))

@maheshr8128 7 жыл бұрын

how to connect external potentiometer with drive.?

@learnchannel-TV 7 жыл бұрын

You should look the manual of your VFD. The pin assignment of the control ports varies from each VFD. Hope I could help you.

@sharmilasharma3447 6 жыл бұрын

Mahesh r

@kouroshabady6526 4 жыл бұрын

Thanks but what an annoying music!

@learnchannel-TV 4 жыл бұрын

I will make a new vid about VFD without loud music - I promise :-)

@kouroshabady6526 4 жыл бұрын

@@learnchannel-TV Thanks 😂

@carloseufemia4884 6 жыл бұрын

why is the music so loud????

@learnchannel-TV 6 жыл бұрын

In my recent videos, the music is quieter or turned off after the introduction.

@kalengi 7 жыл бұрын

kalengi.ir/motor-3-phas/ راه اندازی موتورهای سه فاز Launch of three-phase motors

@Moonja_paaru 4 жыл бұрын

10 Hz moto running time Now time what Voltage????? current? ?????

@mclmm6773 4 жыл бұрын

Need to send that motor back. Shaft has runout.

@learnchannel-TV 4 жыл бұрын

:-)

@henrybartlett1986 4 жыл бұрын

Irritating music.

@learnchannel-TV 4 жыл бұрын

I know. New vid about VFD is in my order list.

@gurpritsingh2355 4 жыл бұрын

Great explanation..

@bramhananddhawas5430 5 жыл бұрын

really nice

@learnchannel-TV 5 жыл бұрын

thanks

@ganeshfokane8286 6 жыл бұрын

Great..

@learnchannel-TV 6 жыл бұрын

thanks!

@watts3694 7 жыл бұрын

1:30