VFD 101 Basics

[@ezcnc4041]

Awesome and easy to understand. I'm a mechanical engineer that deals with lots of electronics but don't have a solid understanding of the magic pixies that make up electronics. You provide an education in a way I can understand. Thank you. Wish more professors would teach like this. Reading and understanding books is a awful and slow challenge for me because of dyslexia that was never seen in elementary school (they didn't look for things like that in the 1970's). Videos help many such as myself that learn visually.

[@irtazaaliarab944]

Bionic reading try out

[@willykitheka7618]

Holy crap!!! The internet can be a important source of learning! This is VERY VERY USEFUL. Thanks for sharing!

[@charlesdouglas9019]

Thank you for this video! I've heard so many people talking about VFDs at work. I thought it would be a much more difficult concept to learn before seeing this video. It was so easy to understand! The real world example (changing frequency to a ceiling fan) helped me understand exactly what was going on! Excellent video!

[@enriquecarmona6498]

Great, good deal bro. VFDs have a plethora of settings a have some with over 120, but this is a very basic intro. Besides they have a lot of internal components that might get damaged if calibrated incorrectly.

[@oscar27ization]

It is a bit more complicated than what he explained

[@charlesdouglas9019]

@@oscar27ization is it? What are some other things I should learn about VFD: terms and definitions I know to begin my deep-dive search?

[@CosmicNihilist]

this is probably the best technical video I've ever set my eyes on, the communicator explains VFD with passion like his life depends on it woow Bravo.

[@dirtbikenrcman]

this really shines a light on to why manufactures prefer to size a motor a bit larger. if my blower motor is rated @1 inwc they often times say for reliability reasons it should be less the .7 inwc even tho its rated at 1 inwc. building on this, heat is what kills a motor and my amp draw is significantly lower at .7 I have a lot less heat and in relative terms more airflow for the given amount of heat. super cool thanks for the video. I already knew how a VFD worked but i'm happy i watched it anyways because this is key information.

[@carmine313]

Learned about this technology when i started working for the rail road. AC propulsion was replacing DC traction power. But you guys teach it better!

[@satishpp1]

The narrator explained VFD basics very clearly.

[@skyaseman5561]

As a RAC engineer I give u 5 stars for very useful information in this video. ⭐⭐⭐⭐⭐

[@Dannzegos]

The best VFD training I have seen thusfar! Thank you!

[@avivides9688]

Probably one of the most clearest and simply put explanations on VFD...Great job guys!

[@johngrubbs9494]

Super tutorial! I am contemplating replacing a single phase motor on my drill press with a 3 phase motor and a VFD. I think I have a better understanding of torque vs. speed now. Thanks.

[@nikkmer]

we need these kind of channels on youtube

[@vizmohanan]

The best tutorial on VFD. \m/

[@ernestosastre7555]

Agreed, I came to understand the DC-AC inversion and at 8:00 he makes it a lot more understandable.. Yet I don't get why the motor sees that conversion as a sinwave equivalent(and because it is dumb is not enough to account for it)

[@lastnameavailableok]

1 thing he didnt really explain is that was the on/off square wave VOLTAGE pulses to motor. Simply when you have a resistance (motor windings) and you apply voltage to a resistance, you get a current drawn by the load (motor). Because the voltage on/off pulses are so quick (microseconds, not even milliseconds), the motor cant tell that the voltage is going on and off so quick and continues to draw a near sinusoidal CURRENT and therefore rotate. As voltage stays on for more and more time, the current drawn reaches its peak, then voltage on/off time (mark/space) is reduced again, the current drawn starts to drop to zero, then the negative bus voltage is switched on to draw the negative current. The sinusoidal 'sinewave' shown over the square wave in video was the CURRENT drawn by the motor. Reducing the voltage on/off times reduces current frequency, which is directly related to motor speed, eg; 10Hz - 60Hz current draw.

[@enriquecarmona6498]

+Ernesto Sastre, it seems like the it's no longer a sine wave anymore. It's like a digital signal or binary code ( varying intensity within the - or the +) so this trick kind of fools the motor into start spinning. perhaps if I attached mi oscilloscope I'd be able to see a squarish sine signal (well sort of) genius. Hit replay and see if I make sense.

[@enriquecarmona6498]

+lastnameavailableok One 60 Hertz means that the current changed 60 times in one second + to -, back and forth. One Hertz is 1/60th of second. If the VFD was capable of handling kHz or MHz then, yes it would be thousandths or millionths of a second.

[@MD-cd7em]

@@lastnameavailableok GOOD EXPLANATION!

[@virdesai1832]

Now there's a proper video for technically challenged people like me!!! Great work....thanks a lot

[@dsnineteen]

Great video. Disco Tesla was just what I needed this morning.

[@rubarb0406]

What a great explanation of how a VFD functions!

[@ToutePuissance]

Excellent 101 training, so clear and easy to fathom

[@erikdavis_9178]

Thanks a lot for this video. Definitely appreciate you going all the way from how a motor that would benefit from a VFD works and how, internally, the VFD works, to the applications of the device itself. Much appreciated.

[@asatagafirllahalhamdulilla9030]

Absolutely best presentation to understand the differences in single and three phase oin the motor. Great job guys thank you.

[@jasperfatty4915]

Holyshit!!!! I actually learned something from the Internet...why isn't school this easy.

[@defytyrantsofmississippi2198]

jasper fatty complication is simplicity misunderstood.

[@marcematt2214]

Because schools are business in a way they can careless if you learn or not they just look the money & then of course politics

[@SamirElias82]

@@marcematt2214 I don't think what you said is necessarily true.

[@Lwhchris]

The people behind these videos are professionals on this field, of course they would teach and explain better in particular topics of their field.

[@gregoryprice2593]

Schools don't have to compete for your attention by focusing on what is best for you. They're in the business of making legislators/funding sources happy.

[@lechimbelismelis9181]

Motors are dumb!!! Hahaha 🤣 cool video!!! I’m an experienced electrician but I always watch this video, it makes me laugh and it’s always good to go back to the basics once in a while.

[@Nickel-st3jw]

Excellent! Highly explanatory and one of the best I have seen

[@saopiseth77]

This is a best video ever that make me more understandable about VSD. Thanks

[@jimdamiani1823]

One of the best informational videos I have seen in a long time and clearly described. Wow!!

[@miguelteixeira3163]

Best explanation I found on the internet after hours of searching! Thank you very much!

[@carterdjohnson9673]

Very good video, however, don't forget a VFD is the most expensive way to save energy dollars on motors for a facility or home, in the end, we are talking about reducing demand charges which is the reduction in the electric bill. Reducing electric charges can be done in a number of ways 1 - Schedule the time when large motors will run, generally moving those operations to later periods say, late after to evening, 2 - hard start kits, which are a large capacitor place at the motor being started reducing in-rush draw and reducing demand on the electrical system, 3 - VFDs, however, make sure all motors with VFD's are inverter-duty or change the standard motors to ECM type which will have a cost saving also.

[@YourLocalIceMan]

Nice video. We use a VFD for our ice rink. It's the coolest thing ever.

[@officialnicko]

this is the best video about 3 phase... hands down

[@MarkBrantner]

Great Refresher Course! Kudos on the Humor.

[@johnlhoffmanjr8158]

Excellent! VFDs are widely used in the oil and gas industry!

[@scottwillis5434]

Great video! At the next level up, it's not "positively" or "negatively charged". The alternating voltage applied results (with a lag) in a stator current and an alternating magnetic field in the stator. The changing magnetic field induces a corresponding field in the rotor. Which is more complex, and why they are talking about charge. 😉

[@logannewport7487]

I was trying to see if anyone was going to point this out. Glad to know some people still know what they're talking about!

[@GarysBBQSupplies]

Best explanation of a VFD EVER. Thanks.

[@sunshine7453]

Thank you for showing the reason why VFD save $$$ and very clearly!

[@HillbillyRednecking]

This explains why the control boxes for the huge ventilation fan motors at my Counties welding shop are soo big, I thought the control boxes for the fan were just for starting and shutting off the motors, then the instructor said the control boxes were for how much air is being sucked out and it senses what the air pressure in the room is, they're huge 3 phase motors maybe 20 or so HP, so how can you control the speed of huge 3p motors, with huge VFD boxes

[@rbyledbal]

SIMPLY AWESOME!! It all makes sense to me now.

[@dinulwijetunge5917]

Well done mate got a proper outlook on how a pwm code in an IGBT just cheats it’s way into mimicking the sine wave through continuous but yet discreet shots of durations altering frequency and voltage.. will join training duly..

[@NinjaTruther]

hands down the best vfd video!

[@marcematt2214]

Oh@ my God you're great I'll watch your video again & again thank you! Sir

[@trebombs4life]

this video explains very well how brushless DC motors work. in terms of the mosfets right?

[@arvinmistry9744]

Excellent explaination thank you very much,

[@dickyrock1]

Yep brilliant video, I've watched heaps that were nowhere close to this. Well done

[@pwnmeisterage]

What sort of (in)inefficiency is caused by the VFD itself? Those converter/inverter/switching processes all consume power and all introduce power losses. I'm guessing it's all about right-sizing the device for the application (and the budget) to maximize real savings.

[@darkforcex7362]

Not really Considering it's all based on voltage, voltage not used is money saved. You cant dissipate voltage without a use. However, incorrect amperage use will use excessive voltage and burn out motor coils. But breakers and fuses regulate this.

[@ramiterreinnovations8359]

Very detailed. Thankyou... Do you video sir how to troubleshoot overheating vfd

[@dannyblain3210]

well done Eaton team! gotta luv the disco ball!

[@Adhithya2003]

Brilliant Video. What a gentle introduction to VFD 🫡🫡

[@soapy_toast]

this was a Very Finely Detailed video.

[@timothypb]

Yea I learned and got clarity on PWM process. Makes me want to build my own VFD.

[@arun44822]

THANKS FOR VFD EXPLANATION. WHAT I WOULD LIKE TO KNOW TT WHEN FREQEENCY CHANGES CURRENT THROUGH MOTOR ALSO CHANGES. WHEN FREQ, IS LOW LX IS LOW ALSO BACK EMF IS ALSO LOW THUS INCREASE IN CURRENT & MAY BURN THE MOTOR. HOW VFD DEALS WITH IT?

[@PeteVree]

From what I understand, as the frequency is reduced, the Xl is also reduced (Xl=2¶fL). This would cause too much current to flow on the windings. So, the drive reduces the output voltage to reduce that excessive current. As the frequency is increased, Xl also increases, which would reduce current flow on the windings. To maintain current flow, and therefore torque, the drive increases the output voltage to account for the increased Xl. This way the drive can provide full torque from low speeds to full rated speed.

[@strawmansam]

"It's not perfect, but motors are dumb.." Hahaha that was hilarious

[@mokoepa]

😂 😂 😂 😂 😂

[@brlinf06398]

the motors are dumb really, because they are dead objects and not living creatures😂😂😂

Very good understanding and explation of VFDs

[@Vonwolfgang2011]

2017 Revit MEP Electrical......loving it!! Great video Eaton/Westinghouse :-)

[@ogbeiwichas1761]

This tutorial is unbeatable and unprecedented. Thanks.

[@mrxracunx]

How can we lower the frequency to 20hz and everything is normal just slow, and sometimes when the frequency hit 48 47hz a huge problem appears putting the machine in danger ?

[@isrbillmeyer]

Well here is the market that will need this... Household Generator gives e.g. 57Hz where the Inverter needs grid input of 50Hz. So the Inverter rejects the input from the Generator. A Unit that can convert Household Generator output to ~50Hz (or what the Inverter in other areas of the world require) will have a good market size if it is not too expensive.

[@chadule2]

Great explanation! I have a question, why would you vary the voltage to the motor on a VFD application? I am trying to understand a motor that works with a voltage of 33-110v and frequency of 60hz to 180 hz. Why would you vary the voltage?

[@emeltea33]

chadule2 I believe that'd change the speed. Whereas changing the voltage of your (probable treadmill) motor's voltage would change its power capability (torque). If this is right, it'll have helped, and if it's wrong ALL of the KZbin experts will redirect... good luck. There are some good tutorials about controlling the speed if you look up different tools, like 2x72, drill press, lathe, and even mills.

[@namibianbackyardengineerin4412]

So the VFD output frequency determines the speed and the voltage the torque?

[@Cfass1]

2022 update: 7:05 they’re now called IGBT+Youth 🏳️‍🌈

[@josecunha731]

Excellent and very comprehensive tutorial.

[@lvxiaoming7619]

Hi, may I ask what is the relationship between power and speed for a constant torque drive?

[@saifulazuan7429]

It is possible for one vfd to control multiple three phase ac motor on cooling tower fan?

[@BusetBali]

Can we use comparison formula to convert that motor's speed by the frequency?

[@hsuan-jenhankwang2448]

Exceptional videos, thank you

[@RickShaw76]

Althoug i m not new to this stuff this is a absolutly great explanation video

[@thierryderbez1441]

Quick question, is it possible to use an oversized motor lets say 25hp instead of a 20hp, and run it at a lower duty cycle (example 80%) and save energy over having a 20hp motor running at 100%? I'm sure that still 20hp weather on a bigger or smaller motor is still 20hp, but I'm wondering if the the fact that the bigger motor can produce more torque with the same impulse (based on build) can maybe make it more efficient

[@kanneboinarakesh2021]

Thanks for the interesting video and what is the the PLC?

[@bernardoprovenzanno9487]

Programmable logic controller...maybe..possble

[@griffmustard]

You killed me with the Tesla impression........LOL!!!

[@joyflowers6693]

So helpful!!! Thank you for such a great explanation!

[@JohnnyJr396]

How do you check the output of the VFD with a basic meter? On a 480v AC motor , although it’s AC I’m assuming you can’t measure AC with a multimeter since it’s pwm. Do you measure amps per leg or scope?

[@driveconstructor5112]

If someone would like to get some practice with sizing drive systems, try the DriveConstructor online course

[@talalalrahbi9430]

Thank you for this video.I have one dots regarding VFD, if VFD designs for power frequency 50HZ ,so can vfd 50hz runs motor 60hz? if not give me solutions basic on your experience>thanks again

[@bigmedge]

@ 7:35, what gives IGBTs the ability to flip the DC's polarity ??

[@knightroadtransports8871]

can a 12v battery power a 3 phase 5hp 250-460volts 60 hertz 15.6 amps tefc motor using the VFD?

[@mendonsix]

"The motor is dumb..." Great video, thanks!

[@slovokia]

Never thought I'd see Tesla's image combined with a disco mirrored ball :-)

[@GauravAgarwal247]

I have a question regarding your fan example. What if we had a regulator to control the speed of the fan?

[@rossy9549]

Don't forget to make sure you have shaft grounding rings for any motor on a VFD.

[@ponsaelectric322]

amazing explanation how three phase motors work. very helpful !!! :)

[@uiticus]

Can Variable Frequency Drives increase the speed above the 60Hz maximum input line frequency?

[@jontopham2742]

11:24 is this referring to the motor's service factor or is that different?

[@amessman]

Absolutely amazing video! Thanks!

[@thecreator2488]

Very good explanation Sir excellent video👌

[@adamrohde3513]

Does the torque capability increase when the speed is less? And vice versa when the speed is increased? Does the speed-torque curve match a servo?

[@zenebehagos3537]

dear, sir, it is an invaluable lecture and go-ahead to share with us, thanks a lot.

[@1989Chrisc]

Can vfd's increase the mains frequency? or is there some other device used for what I am asking.

[@josep2694]

Could I adjust speed twice on each revolution? lets say from 0degress to 90 degrees one speed then other speed the rest of the revolution ? can a signal be inputed to the frequency drive so it changes the speed at a certain degrees?

[@electric_techie]

Moter ko star m vfd s chla sakte hai kya

[@bdelozier07]

Love this video. Helped me in a way I could understand!

[@terrydavis9311]

Very good. Thanks for making it available.

[@MIO9_sh]

I expect trains in application... but you used fan instead

[@nithin.s9981]

Great explanation. Thanks for easing it out!

[@Martina_Vintage_Motorcycles]

Very good video, although I’m well versed in everything you covered this would be an awesome video for someone just starting out, I wish this type of thing was available to me 25 years ago

[@cameronnpd7466]

awesome video. Super easy to understand

[@sohailjanjua123]

Hi, I like your lecture. Thanks

[@Th3Su8]

Good explanation of the inner workings of a VFD. However, to say that the VFD outputs AC voltage would be technically incorrect. It is a square wave. I know I am being nit picky.

[@roy6059]

I'm new to this stuff I just have a question , you explained about controlling a fan using VFD, how is this different from controlling a fan using a simple potentiometer (Fan Regulator)

[@jasmany19]

bruh, have you ever heard of the formula for synchronous speed for motors? N=120F/P where N=synchronous speed, F=frequency, P=number of poles. These are the methods for controlling synchronous speed (speed of the magnetic field in the stator), the number of poles are set after construction so the only thing you can fucks with is the frequency. A potentiometer would just adjust your voltage which would not offer a fuckable method for controlling motor speed.

[@uzialoush6108]

So smart! Loved it.

[@Jamz2k]

So when you measure output of the igbt do you measure AC or DC What do you set meter to

[@automationselmatx4669]

Just the level of detail I was looking for... Thank you for this information!

[@jimsvideos7201]

This video is pretty cheeky, particularly for so large a company. That's an observation, not a complaint.

[@jamesyager7374]

Thank you well done training video.