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.
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!
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.
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.
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.
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)
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.
+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.
+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.
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.
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.
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. 😉
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.
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.
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..
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
Great work, I like your videos. Inverters are also converters...rectifiers and inverters are comprehensively called converters. IGBTs are used because they've got an additional p-layer in their internal structure which is responsible for conductivity modulation, making them suitable for applications with higher power rating...MOSFET for example have better switching frequency capabilities than IGBTs. The static power semiconductors switches used are really a function of your ratings. In sinusoidal pulse width modulation, you wanna switch as frequently as you can to shift the harmonic content to a higher order spectrum and have the fundamental component approximate the sinusoid to as close as it practically gets.
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?
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.
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.
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.
No Tesla did not invent the 3 phase motor A polish German invented the 3 0hase 3 wire system we use today ,Not Tesla .the first AC single phase motor was invented by an italian .Tesla came up with a 6 wire polyphase system .Feel free to correct me if I am wrong
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
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.
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.
I very much enjoyed your video. Very educational. The only thing I'm confused about is that it seems that a load that changes more should be called a variable torque load as opposed to, say, a fan pushing air, which would seem more like a constant load. Could you explain that a little bit please.
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?
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 RUclips 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.
Thanks for the nice video presentation, however it would be nice to hear what is VFD impact to reactive power since it is the power component we would like to avoid in running inductive motors. I know that there are effective solutions with condenser batteries (so-called compensation panels). I would appreciate EATON's comment.
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.
Bionic reading try out
Holy crap!!! The internet can be a important source of learning! This is VERY VERY USEFUL. Thanks for sharing!
Probably one of the most clearest and simply put explanations on VFD...Great job guys!
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!
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.
It is a bit more complicated than what he explained
@@oscar27ization is it? What are some other things I should learn about VFD: terms and definitions I know to begin my deep-dive search?
The best VFD training I have seen thusfar! Thank you!
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.
Now there's a proper video for technically challenged people like me!!! Great work....thanks a lot
As a RAC engineer I give u 5 stars for very useful information in this video.
⭐⭐⭐⭐⭐
we need these kind of channels on youtube
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!
The narrator explained VFD basics very clearly.
What a great explanation of how a VFD functions!
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.
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.
Excellent! Highly explanatory and one of the best I have seen
The best tutorial on VFD. \m/
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)
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.
+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.
+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.
@@lastnameavailableok GOOD EXPLANATION!
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.
Absolutely best presentation to understand the differences in single and three phase oin the motor. Great job guys thank you.
One of the best informational videos I have seen in a long time and clearly described. Wow!!
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.
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. 😉
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!
Best explanation I found on the internet after hours of searching! Thank you very much!
Excellent 101 training, so clear and easy to fathom
This is a best video ever that make me more understandable about VSD. Thanks
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.
Holyshit!!!! I actually learned something from the Internet...why isn't school this easy.
jasper fatty complication is simplicity misunderstood.
Because schools are business in a way they can careless if you learn or not they just look the money & then of course politics
@@marcematt2214 I don't think what you said is necessarily true.
The people behind these videos are professionals on this field, of course they would teach and explain better in particular topics of their field.
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.
Nice video. We use a VFD for our ice rink. It's the coolest thing ever.
Great video. Disco Tesla was just what I needed this morning.
dear, sir, it is an invaluable lecture and go-ahead to share with us, thanks a lot.
Best explanation of a VFD EVER. Thanks.
Thank you for showing the reason why VFD save $$$ and very clearly!
Yep brilliant video, I've watched heaps that were nowhere close to this. Well done
this is the best video about 3 phase... hands down
Oh@ my God you're great I'll watch your video again & again thank you! Sir
Excellent and very comprehensive tutorial.
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..
Excellent explaination thank you very much,
Very good explanation Sir excellent video👌
SIMPLY AWESOME!! It all makes sense to me now.
Very detailed. Thankyou...
Do you video sir how to troubleshoot overheating vfd
2017 Revit MEP Electrical......loving it!! Great video Eaton/Westinghouse :-)
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
Excellent! VFDs are widely used in the oil and gas industry!
You killed me with the Tesla impression........LOL!!!
Great video great explanation .. thumbs up :)
This tutorial is unbeatable and unprecedented. Thanks.
Never thought I'd see Tesla's image combined with a disco mirrored ball :-)
Great work, I like your videos. Inverters are also converters...rectifiers and inverters are comprehensively called converters. IGBTs are used because they've got an additional p-layer in their internal structure which is responsible for conductivity modulation, making them suitable for applications with higher power rating...MOSFET for example have better switching frequency capabilities than IGBTs. The static power semiconductors switches used are really a function of your ratings. In sinusoidal pulse width modulation, you wanna switch as frequently as you can to shift the harmonic content to a higher order spectrum and have the fundamental component approximate the sinusoid to as close as it practically gets.
this was a Very Finely Detailed video.
Very good understanding and explation of VFDs
Althoug i m not new to this stuff this is a absolutly great explanation video
Nicely explained! You have an interesting way of writing an 'S'. :)
this video explains very well how brushless DC motors work. in terms of the mosfets right?
Great Refresher Course! Kudos on the Humor.
"It's not perfect, but motors are dumb.." Hahaha that was hilarious
😂 😂 😂 😂 😂
the motors are dumb really, because they are dead objects and not living creatures😂😂😂
amazing explanation how three phase motors work. very helpful !!! :)
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?
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.
Yea I learned and got clarity on PWM process. Makes me want to build my own VFD.
awesome video. Super easy to understand
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.
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.
Very good. Thanks for making it available.
Love this video. Helped me in a way I could understand!
This video is pretty cheeky, particularly for so large a company. That's an observation, not a complaint.
No Tesla did not invent the 3 phase motor A polish German invented the 3 0hase 3 wire system we use today ,Not Tesla .the first AC single phase motor was invented by an italian .Tesla came up with a 6 wire polyphase system .Feel free to correct me if I am wrong
Great video very informative
Hi, I like your lecture. Thanks
Great explanation. Thanks for easing it out!
Just the level of detail I was looking for... Thank you for this information!
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
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.
Absolutely amazing video! Thanks!
Thank you very much, nice explanations ... you're the best
"The motor is dumb..." Great video, thanks!
Nice video about function of a VFD
Brilliant Video. What a gentle introduction to VFD 🫡🫡
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.
Great explanation of everything!
YOU ARE A GOOD COMMUNICATOR!
Pretty good little video. Nice work.
Exceptional videos, thank you
I expect trains in application... but you used fan instead
I very much enjoyed your video. Very educational. The only thing I'm confused about is that it seems that a load that changes more should be called a variable torque load as opposed to, say, a fan pushing air, which would seem more like a constant load. Could you explain that a little bit please.
Very nice easy to follow tutorial.
well done Eaton team! gotta luv the disco ball!
Thanks...keep them coming...
amazing video on power electronics
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?
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 RUclips 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.
Bueatifully explained! Thanks.
If someone would like to get some practice with sizing drive systems, try the DriveConstructor online course
Really awesome video. Thanks
Great introductory video
So smart! Loved it.
Don't forget to make sure you have shaft grounding rings for any motor on a VFD.
Have anyone noticed the misspell of " TELSA"? Great explanations by the way. Thanks
Great video.
So helpful!!! Thank you for such a great explanation!
beautiful video
Very good and easy to follow.
Thanks for the nice video presentation, however it would be nice to hear what is VFD impact to reactive power since it is the power component we would like to avoid in running inductive motors. I know that there are effective solutions with condenser batteries (so-called compensation panels). I would appreciate EATON's comment.
Can we use comparison formula to convert that motor's speed by the frequency?