My mental capacity was at peak crumbling from being frustrated and burned out for hours just before I met this video. The semester exams kept knocking at my door. I was almost in tears as I tried to keep seated and watch in this dead of the night. This video was like a shot of an anti-anxiety medicine. I couldn't wish for more than this. You're an angel.
These videos are like liquid gold to anyone remotely interested in electricity and how it works. The explanation and animations make it so easy to understand
I don't think I've ever seen such an incredible explanation of anything. I mean, that animation was just unbelievable! I knew how a VFD worked... but now I REALLY KNOW. Thanks for all of that, much appreciated guys.
This couldn't have been published at a better time. I am a current UMaine electrical engineering student and am about to embark on my senior project, which happens to be a VFD I am constructing with a partner, by ourselves. This video helped tremendously, and we will be sure to give you more than enough credit come presentation time. Thank you so much for this.
Retired robotic & VFD tech here. Absolutely wonderful video. Its done well for what is needed at this part of the training exercise. Had a great time in Aerospace and “other” government facilities working on so many different things.
God Tier teacher! I work in a trade school and sometimes it's hard for the students to get a grasp of the material, but these videos explain everything so clearly!
Amazing explanation. We engineers have gone through these lessons during our electrical engineering classses, but never had the opportunity to visualize anything in such perspective. Kudos to the creator.
Very good explanation of VFDs. Not mentioned here, but you can also get a 230v single phase in to 380v three phase out VFD. Extremely useful to allow the use of 3 phase workshop equipment when you only have a single phase supply!
Your videos are amazing. Just throwing this out there. I'm a retired shipyard electrician and something I've seen several times are people mis-wiring tools because they believe that pos and neg switches back and forth such as the light bulb plugged into the receptacle seems to suggest. With that logic, they see no reason to determine which wire in the cord is hot and which is neutral because they believe that AC just switches back and forth. The problem arises when the metal frame of a hand tool becomes energized and they get shocked. It should be noted that at no time is the Earth/Neutral/Ground... side of the circuit 120/240/460...V of a - single/split phase - positive. I love these videos!
One of the best videos I've ever seen explaining VFD. It takes some time to explain to technicians at work, and some experience to fully understand it. Will definitely utilize this... Thank you for posting, Automation specialist.
It was very helpful. I studied this circuit in bachelor but did not know the application. Now at work i am working with VFD modules. Thank you for the simpliest explaination.
Awesome explanation! I'm currently leading a team that's in charge of designing a groundwater pumping system that will require a rather large centrifugal pump. The area in question only has single phase power available, but powering our pump will likely require 3 phase power. A mentor suggested to us to look into using a VFD. This video really helped me understand the concept and I can't wait to share it with the rest of my team! Thank you!
It would have been nice to have had videos like this when I was in college for engineering. I had to work real hard to pass and now I am a Professional Electrical Engineer
I won't lie, when I took a look at a VFD diagram I at first was like, "Nah, a 3-phase AC motor can't be driven by (essentially) a 3-phase DC load/drive." Then after watching this video, I was like, "Welp, I wasn't technically wrong but nor was I right either." After watching the last section of the video I mean on how the IGBTs simulate or get the DC current to behave in a manor that is similar to that of AC. Genius stuff. :) I work at a package handling place (won't disclose where just because I want to keep my privacy) and my supervisor asked me what I wanted to do and I said, "Well, I want to climb up the ladder in this place" and I was asked if I went to school and I said, "I don't because it'll cost a bit much for what I'm making but I am self-taught" and they asked, "What do you know if you don't mind me asking?" and I was like, "Well..." I looked and I gestured towards the Eaton belt motor and I said, "you see that blue motor that's driving the belt system?" and they nodded, I then went on to explain in a super quick summary that the motor is essentially driven by DC electricity but there is a limitation of how much it can vary the speed and what drawbacks there are too it, like for example if you try to push more voltage into it, it could go faster or it could detriment it or damage the coils. but then again I can be entirely wrong on that statement alone and I feel embarrassed. Can someone correct me just in case if what I said is wrong? I don't market myself as a world genius, I only market myself as a person who just wants to be properly informed and have the correct information on-hand. That and I love to learn new things from computers to auto mechanics. Anyway, my supervisor was just surprised and was like, "Why aren't you in engineering man? You'd be great at that and you wouldn't have to worry about manual labor all that much." And I said with honesty that, "I would love to man, but I'm not certified in that area of expertise because I am self-taught and I can't say that I know everything because I don't. That is why I would like to learn and confirm everything first before I can justifiably say that I am certified. Just covering my bases is all." and the supervisor nodded and said, "Understandable and very honest." He didn't say that to be sarcastic, he said that with sincerity as in, 'I'm glad that you're honest with yourself and others, most would get cocky and wing it.'-sort of thing. Sorry if this rambling just lead into nonsense, I just love to learn and I love this video. Thank you so much. :)
I really perfect tutorial. No music, no nervous voice, great graphics, good to understand also by people with other mother tongue. Thank you verry much.
This is better than the apprenticeship school. One video is worth more than ten thousand words or pictures. I am a retired electrician who is still learning from UA-cam.
These are absolutely amazing. I already have learned this stuff, but these are absolutely incredible for a refresher and I show it to people interested too and they can grasp most of it as well. Please don’t stop making these videos!!!
I wish I would have had these videos to explain everything when I was going to college 20 years ago!! These are awesome, you make it very easy to understand the principles of electricity and how things in our lives work....Cheers guys!!
I’ve been an Electrician for a long time starting in the USCG but never had the opportunity to learn about “freak drives”. Thank you for the tutorial and I bought you a cup of coffee in appreciation!
What a fantastic Video, Clear Concise and Precise. I am from a Marine and Mechanical Engineering background and videos like this drags us into your world of electrical Engineering.
Well done video. As a Danfoss rep, I plan to use this for my customers. The only mistake I found in your video is the description starting around the 9:22 mark. The current will be flowing in 3 of the diode except when one of the sine waves crosses zero.
This is video, and all of the videos on this channel, are hands down the most effective learning resources I’ve ever come across, across all subjects I’ve sought knowledge about. I’ve learned more about electricity in the last 30 minutes than I have in the last 3 years of dabbling. Thank you SO MUCH for producing these amazing videos!!
Nice explanation. Just a small correction: From time 4min40sec, I think peak voltage and current has a 90° phase to peak flux, therfore the anmiated electrons are moving at the wrong time. The point of maximum flux should be aligned with zero current (and zero voltage) as dB/dt = 0 during peak flux.
I was working in different companies which are usung VFD without a complete knowledge about its function,, now i know so clearly,,, thank you so much for the detailed explanation sir..
I'm just studying to become a train technician and this video was let's say VERY useful information about the IGBT control over the three phase sinewaves. Thanks a lot! Even our teacher is recommending your channel :)
I'm talking from Bangladesh, this video is very very important for me because i am an engineer and VFD is very uses in my office (factory). Go ahead with confident.... Thank you so much....!!!
This is by far the best channel i ever seen for electrical knowledge. I am super super confusing in electrical engineering, really appreciate your effort to make it more understandable. Really thanks a lot!!!!! good job bro!
I installed two VFDs on a 250hp and 200hp irrigation pumps on my farm a couple years ago. Not only did they lower my power bill by about $8k a year but they are controlled by water pressure sensors. So I can easily run 1, 2, 3... lines (whatever I want) by simply opening valves and the VFD will accommodate the new load. Much easier and more flexible. No longer do I blow out pipe because someone closed a valve they shouldn't have in an emergency; or having to water places that don't need it just to keep the pressure down.
Great to hear! Pumps and fans are some of the best applications for VFDs where money can be saved. A simple reduction in speed of 10% is a bit more than 25% reduction in power consumption. Another thing you can think about with those is that not only are you not blowing out pipes, but you're increasing the lifetime of your pump impeller by likely limiting cavitation.
It's the sign of a master to bring complicated issues back to their essence. Well done. Just curious what all this clever engineering to save electricity does for human health.
I'm a Electrician apprentice & even though I don't need to understand how this work, just how to hook it up its still very interesting how the things I install work. Thanks for the videos
The video was great. Some corrections: 3:50 No, the electrons in the windings of the generator don't move because the magnets "push or pull depending of polarity." If that was true, holding the magnet still should also make the electrons move, because the magnets still have its polaritiy; but in real life this doesn't happen. Instead, you need a _changing_ magnetic field (in the case of AC motors and generator, it is a rotating magnetic field.) 5:54 No, in general the coils are not inserted shifted 120 physical degrees (also known as mechanical degrees) into the stator. Actual generators have a lot of windings for each phase, so they phase shift is less than 120° mechanical; you may want to read about Ferrari's theorem. What is true is that the output line-to-line voltrages are each shifted 120 electrical degrees from the other two.
We have hundreds in use, I usually change about 1 a week (dirty environment, heat kills them) I started wiring homes at 17, learned how to make electricity work, but at 58 I'm still learning "how". I converted my Lincoln AC220 stick welder to DC. I just picked up a 10hp 3~ air compressor, I'll be buying a VFD to power it from single phase!
I had a pretty good grasp on all of this except how the final A/C waveform was generated. Makes total sense to me now. I work on vintage electronics in my side business and am about to move to a more complex industrial electrical maintenance role at my day job. It's always fascinating to me to learn about the things the modern transistor has enabled us to accomplish, but I'm also still amazed by what we were able to accomplish before that technology existed.
I'm an electronics tech, and have worked with these, and similar devices. But, I have to say that a young me would have loved to come across a video like this. The explanation was great.
Awesome video. Although I'm surprised you didn't mention CNC machines since it must be the single most common user of VFDs. The whole automation industry is founded upon the VFD to make variable speed, feed, interpolation, and control possible.
Variable frequency drives couldn't be explained any better than this. It's great to explain to the audience with the perfect video, animations. Thank you for video.
So Google literally reads your mind lol or more likely traces very well your browsing patterns....:-) Then you wonder who is thinking here - you or Google? LOL
This video gives a better depiction than my college years studying electrical engineering. I'm more of a visual learner and till now I didn't exactly understand how a capacitor smooths ripples.
I have a degree in comp.elctr.engineering technology. Ive worked at Intel mainly as technician for installation and modification of semiconductor equipment in past 5 years. Ive recently applied at UPS for an opening for a Buildings & Systems engineer mechanic....Major work activities for this position include: Troubleshooting, adjusting, and replacing AC and DC electrical equipment such as batteries, control stations, fuses, motor starters, relays, switches, timers, servo driven equipment, Programmable Logic Controllers (PLCs), photo electrical devices, transducers, Variable Frequency Drives (VFDs) and encoders. Inspecting, troubleshooting, repairing, and/or replacing mechanical components such as motors, reducers, drive chains, sprockets, sheaves, pulleys, rollers, conveyor belts, bearings, and transfer plates. Inspecting, troubleshooting, repairing, and/or replacing pneumatic equipment such as diverters, air compressors, lubricators, hoses, and coils. Inspecting, troubleshooting, repairing and/or replacing hydraulic equipment such as hoses, fittings, cylinders, and pumps. Welding equipment such as hand rails, conveyor supports, package handling equipment, carts, and grading. Performing preventive maintenance inspections of plant equipment such as conveyors, bulk carts, and power industrial equipment. I have to take a 25 question test onsight to be considered for the position. What should I know to be prepared for questions related to those duties??? Can you help me ?
Just let it ripple through your mind. A canned answer is good for smoothing out the gaps. It all depends on what you are filtering - whether content or output.
These videos are awesome. Kudos to the content creator. I have been in the trades for about 5 years and all the schooling I have received left me with gaps in explanations. Thank you so much for the visual aids in helping to truly understand the basics of electricity.
I am a commercial hvac/r technician have been doing hvac/ refrigeration for 6 years love too learn new things want too get a bachelors in mechanical engineering and continue too grow my knowledge I have now been promoted too a facility manager position but kind of like the field more thank you for this explanation love all your videos great knowledge! Have worked on 3 phase motor control panels that send power too centrifugal suction end pumps 7.5 hp and 10 hp condenser and chilled water pumps for 2 racks of 100 tons of cooling each rack with 2 compressors in tandom and the 3rd on its own circuit. Also have a cooling tower we replaced the 25hp motor Baltimore also float switch repairs for fill valve of the condenser water great stuff did many commercial hvac service calls too many different hotels and facilities country clubs fascinated by hvac and mechanical ventilation and heating as well as kitchen equipment heating elements ovens.
Thanks for these videos. I watch these after class so i can actually understand. I pay thousands for electrical apprenticeship and the visuals, explanations, and graphics are better than what i have at school. If it wasn't for UA-cam id be failing school. Thanks for being exceptional. College now is a joke.
Careful around these, even unplugged you have to wait few minutes (capacitors will discharge) to operate them ( for example for maintenance purposes ).
Amazing!! I've used VFDs. I've used diodes, rectifiers, capacitors individually. I've done some DIY AC/DC circuit design. Still going to take a few more views to grasp everything in the video. And then fixing my broken generator/inverter should be easier.
Generally, yes. The motors and inverters are a bit different in design due to the torque requirements (same in modern electric vehicles) but the same principle applies.
Wow, if you had made these videos 20 years ago, I would not have had to go to collage to learn electronics. Just let you come into my computer and teach me at home. GREAT JOB.. and way more clear then collage books..
Collage is a technique of art creation, primarily used in the visual arts, but in music too, by which art results from an assemblage of different forms, thus creating a new whole.
@@chrisnsamba4272 I know they sometimes do this,but it doesnt always work.When i've been involved installing 11KV VSD's, they do a Pre and Post Study. We also have to inform the DNO they are being installed, as it does cause network problems
The filters in VFD's arent efficient enough to block out all harmonics and when you have a bunch of VSD's this can cause a lot of harmonic distortion. To counteract this, passive and active harmonic filters are installed in the circuit and active harmonic filters in parallel with the VFD circuits work best to filter out any harmonics from the VFD's.
I used to specify VFDs in the 1970s. Then, both they and the wound-rotor motors they demanded were muy expensive, and so employed infrequently. I watch thru the years as the concept evolved until recent years when we use a few extra semiconductors and squirrel cage motors to achieve the same result. Good on us.
Holy crap, outstanding video! And what a waste of April Fools Day. You could've announced "Electricity 2.0" or something. 😊 Great work again, cheers! AND STAY HEALTHY!
I can’t be the only one who read “A series of unfortunate events” and coincidentally stumbled upon this coincidentally convenient abbreviation, correct?
Hah, they didn't even teach you how to do taxes nor find edible food in the wild, and now all they teach is how to wear a condom and believe what you see on the television...
Hybrid vehicles use a High Voltage battery then use the inverter to make 3 phase AC power to the drive motor. This video was a great way to see how the three phase AC becomes a variable frequency drive or VFD. Thank you.
I'm a chemical engineer so whenever I'm in meetings with the mech or electric engineers my eyes just tend to glaze over whenever conversations get into duty/support/standby blowers, motor frequencies etc. so this video was super helpful. At least now I'll be able to pretend that I know what they're talking about. Your PLC video is next so I can impress the panel guys with how not-rubbish I am at practical engineering
thank you 🙏 this is the level of depth I was looking for. When I was introduced to freak drives during my electrical apprenticeship, I understood, but didn’t grasp. The visual aides were mint! Cheers
Thank you Paul for this video. I'm trying to build a 25vac 3 phase 400hz supply for a Bendix HSI and this educational video is the kind of video I wish I had been able to see a long time ago. Your explanation is among the best tutorial I've ever seen on any subject.
I see the huge effort that was put into this video, nice work. I think an important part is missing though. I watched other videos about inverters too and none of them answered the crucial question: Where is the arbitrary target frequency coming from? What circuit produces just whatever frequency I need for the PWM to imitate? In another video I saw that a comparator generates the pulses by comparing a dense triangle wave and the target sine wave. But even that video didn't mention from where the target sine wave and the triangle wave are coming from. So how is the target frequency produced and changed arbitrarily?
Ever since I bumped into this channel few days back, it has been my favorite for quickly understanding difficult electrical & electronics concept. Watching your videos most times makes me think I've been wasting my time here in my university because ever since I've been an Engineering student here, I've just always been pressured in getting A grades in most courses & not grade A practical understanding of these courses. If I may ask sir, do you have any online course or training for Electrical & electronics that I can enroll for. I don't mind the payment sir
⚠️ *This video took weeks to make* Buy Paul a coffee to say thanks: ☕
PayPal: www.paypal.me/TheEngineerinMindset
Work worth reward! Brilliant videos
Lim
@@fRoStLIM đ
f n,ldsadv
@@ivananovelly580 uuuuhuujkojojoj
My mental capacity was at peak crumbling from being frustrated and burned out for hours just before I met this video.
The semester exams kept knocking at my door.
I was almost in tears as I tried to keep seated and watch in this dead of the night.
This video was like a shot of an anti-anxiety medicine.
I couldn't wish for more than this.
You're an angel.
These videos are like liquid gold to anyone remotely interested in electricity and how it works. The explanation and animations make it so easy to understand
I agree. i knew how 3 phase worked, but now i feel like i know how it works but better.
Absolutely 😊
i cant get enough of them its so great
Indeed 🙌
Amazing Explanation... 👍👍👍👍👍
I've taken Physics II, Circuits, and Industrial Electronics classes... this guy did a better job explaining things than the teachers I paid
Qualitatively, yes. But in Engineering, numbers are what drive everything.
I don't think I've ever seen such an incredible explanation of anything. I mean, that animation was just unbelievable! I knew how a VFD worked... but now I REALLY KNOW. Thanks for all of that, much appreciated guys.
and now i know how a 3 phase rectifier works.
This couldn't have been published at a better time. I am a current UMaine electrical engineering student and am about to embark on my senior project, which happens to be a VFD I am constructing with a partner, by ourselves. This video helped tremendously, and we will be sure to give you more than enough credit come presentation time. Thank you so much for this.
UMaine Alumni Unite!
Retired robotic & VFD tech here. Absolutely wonderful video. Its done well for what is needed at this part of the training exercise. Had a great time in Aerospace and “other” government facilities working on so many different things.
God Tier teacher!
I work in a trade school and sometimes it's hard for the students to get a grasp of the material, but these videos explain everything so clearly!
Amazing explanation. We engineers have gone through these lessons during our electrical engineering classses, but never had the opportunity to visualize anything in such perspective. Kudos to the creator.
All I can say is thank you Paul and to whoever else working behind the scenes.
Very good explanation of VFDs. Not mentioned here, but you can also get a 230v single phase in to 380v three phase out VFD. Extremely useful to allow the use of 3 phase workshop equipment when you only have a single phase supply!
Your videos are amazing. Just throwing this out there. I'm a retired shipyard electrician and something I've seen several times are people mis-wiring tools because they believe that pos and neg switches back and forth such as the light bulb plugged into the receptacle seems to suggest. With that logic, they see no reason to determine which wire in the cord is hot and which is neutral because they believe that AC just switches back and forth. The problem arises when the metal frame of a hand tool becomes energized and they get shocked. It should be noted that at no time is the Earth/Neutral/Ground... side of the circuit 120/240/460...V of a - single/split phase - positive. I love these videos!
I have tried to actually understand this for about 8 years.. this flipped the coin. Thanks a lot!
I know!
تنلمباقيزيعاابويمنظلظ
8 years??? why
It was pretty straight forward if you spent time in tinkering in actual circuit.
@@johnwick5901 who killed your dog?
One of the best videos I've ever seen explaining VFD. It takes some time to explain to technicians at work, and some experience to fully understand it. Will definitely utilize this...
Thank you for posting,
Automation specialist.
Glad you enjoyed and found it useful
It was very helpful. I studied this circuit in bachelor but did not know the application. Now at work i am working with VFD modules. Thank you for the simpliest explaination.
Awesome explanation! I'm currently leading a team that's in charge of designing a groundwater pumping system that will require a rather large centrifugal pump. The area in question only has single phase power available, but powering our pump will likely require 3 phase power. A mentor suggested to us to look into using a VFD. This video really helped me understand the concept and I can't wait to share it with the rest of my team! Thank you!
Oh amazing use. What do you do?
Engineering mindset is my best engineering channel I've seen on UA-cam.
RESPECT MR. PAUL 👍
the world is quiet here
real
I’m here with yall, we got this
Sssshhhhhh
Im working in Danfoss authorize distributor company, this help me so much as a service engineer for this inverter
It would have been nice to have had videos like this when I was in college for engineering. I had to work real hard to pass and now I am a Professional Electrical Engineer
so true.....
I won't lie, when I took a look at a VFD diagram I at first was like, "Nah, a 3-phase AC motor can't be driven by (essentially) a 3-phase DC load/drive." Then after watching this video, I was like, "Welp, I wasn't technically wrong but nor was I right either." After watching the last section of the video I mean on how the IGBTs simulate or get the DC current to behave in a manor that is similar to that of AC. Genius stuff. :)
I work at a package handling place (won't disclose where just because I want to keep my privacy) and my supervisor asked me what I wanted to do and I said, "Well, I want to climb up the ladder in this place" and I was asked if I went to school and I said, "I don't because it'll cost a bit much for what I'm making but I am self-taught" and they asked, "What do you know if you don't mind me asking?" and I was like, "Well..." I looked and I gestured towards the Eaton belt motor and I said, "you see that blue motor that's driving the belt system?" and they nodded, I then went on to explain in a super quick summary that the motor is essentially driven by DC electricity but there is a limitation of how much it can vary the speed and what drawbacks there are too it, like for example if you try to push more voltage into it, it could go faster or it could detriment it or damage the coils. but then again I can be entirely wrong on that statement alone and I feel embarrassed. Can someone correct me just in case if what I said is wrong? I don't market myself as a world genius, I only market myself as a person who just wants to be properly informed and have the correct information on-hand. That and I love to learn new things from computers to auto mechanics. Anyway, my supervisor was just surprised and was like, "Why aren't you in engineering man? You'd be great at that and you wouldn't have to worry about manual labor all that much." And I said with honesty that, "I would love to man, but I'm not certified in that area of expertise because I am self-taught and I can't say that I know everything because I don't. That is why I would like to learn and confirm everything first before I can justifiably say that I am certified. Just covering my bases is all." and the supervisor nodded and said, "Understandable and very honest." He didn't say that to be sarcastic, he said that with sincerity as in, 'I'm glad that you're honest with yourself and others, most would get cocky and wing it.'-sort of thing.
Sorry if this rambling just lead into nonsense, I just love to learn and I love this video. Thank you so much. :)
I really perfect tutorial. No music, no nervous voice, great graphics, good to understand also by people with other mother tongue. Thank you verry much.
This is better than the apprenticeship school. One video is worth more than ten thousand words or pictures. I am a retired electrician who is still learning from UA-cam.
What an amazing explanation is this? So effective, pure informative and easiest way to explain.
True use of UA-cam are channels like these ... A million thanks for the lucid explanation and super helpful animation! 🙏🏽🙏🏽🙏🏽🇮🇳🇮🇳🇮🇳
These are absolutely amazing. I already have learned this stuff, but these are absolutely incredible for a refresher and I show it to people interested too and they can grasp most of it as well. Please don’t stop making these videos!!!
Absolutely 0 critiques, brilliant job on this video!!!
I wish I would have had these videos to explain everything when I was going to college 20 years ago!! These are awesome, you make it very easy to understand the principles of electricity and how things in our lives work....Cheers guys!!
I’ve been an Electrician for a long time starting in the USCG but never had the opportunity to learn about “freak drives”. Thank you for the tutorial and I bought you a cup of coffee in appreciation!
Glad you enjoyed and thank you for the support! much appreciated, Bill.
Your videos are amazing. Even if I have a grasp of the topic, I enjoy your explanation and the videos. Especially because I'm more of a visual person.
What a fantastic Video, Clear Concise and Precise. I am from a Marine and Mechanical Engineering background and videos like this drags us into your world of electrical Engineering.
Dear god it's so beautiful.
I had a hard time understanding this topic in our class.
I finally understand it.
Thank youuuuu 😭😭😭💕🎉
Well done video. As a Danfoss rep, I plan to use this for my customers. The only mistake I found in your video is the description starting around the 9:22 mark. The current will be flowing in 3 of the diode except when one of the sine waves crosses zero.
I am literally making it through my elevator apprenticeship thanks to you guys. thank you very much
This is video, and all of the videos on this channel, are hands down the most effective learning resources I’ve ever come across, across all subjects I’ve sought knowledge about. I’ve learned more about electricity in the last 30 minutes than I have in the last 3 years of dabbling. Thank you SO MUCH for producing these amazing videos!!
Nice explanation. Just a small correction: From time 4min40sec, I think peak voltage and current has a 90° phase to peak flux, therfore the anmiated electrons are moving at the wrong time. The point of maximum flux should be aligned with zero current (and zero voltage) as dB/dt = 0 during peak flux.
I was working in different companies which are usung VFD without a complete knowledge about its function,, now i know so clearly,,, thank you so much for the detailed explanation sir..
That is the closest I have ever come to understanding something about electricity. Awesome video!
I'm just studying to become a train technician and this video was let's say VERY useful information about the IGBT control over the three phase sinewaves. Thanks a lot! Even our teacher is recommending your channel :)
Your videos (especially this one) are so information rich that I always need to watch more than once. Nice job, I will be buying you a coffee
I'm talking from Bangladesh, this video is very very important for me because i am an engineer and VFD is very uses in my office (factory).
Go ahead with confident....
Thank you so much....!!!
Absolutely wonderful, I have been a technician on Elctric Trains for years and never really understood VVVF IGBT etc. Now it mostly makes sense.
This is by far the best channel i ever seen for electrical knowledge. I am super super confusing in electrical engineering, really appreciate your effort to make it more understandable. Really thanks a lot!!!!! good job bro!
First I don't know why anyone wouldn't Subscribe to your channel best electronic explanation video that is animated Nice 👍👍
Well done, you're fast
I installed two VFDs on a 250hp and 200hp irrigation pumps on my farm a couple years ago. Not only did they lower my power bill by about $8k a year but they are controlled by water pressure sensors. So I can easily run 1, 2, 3... lines (whatever I want) by simply opening valves and the VFD will accommodate the new load. Much easier and more flexible. No longer do I blow out pipe because someone closed a valve they shouldn't have in an emergency; or having to water places that don't need it just to keep the pressure down.
Great to hear! Pumps and fans are some of the best applications for VFDs where money can be saved. A simple reduction in speed of 10% is a bit more than 25% reduction in power consumption. Another thing you can think about with those is that not only are you not blowing out pipes, but you're increasing the lifetime of your pump impeller by likely limiting cavitation.
It's the sign of a master to bring complicated issues back to their essence. Well done. Just curious what all this clever engineering to save electricity does for human health.
Very true!
I'm a Electrician apprentice & even though I don't need to understand how this work, just how to hook it up its still very interesting how the things I install work. Thanks for the videos
The video was great. Some corrections:
3:50 No, the electrons in the windings of the generator don't move because the magnets "push or pull depending of polarity." If that was true, holding the magnet still should also make the electrons move, because the magnets still have its polaritiy; but in real life this doesn't happen. Instead, you need a _changing_ magnetic field (in the case of AC motors and generator, it is a rotating magnetic field.)
5:54 No, in general the coils are not inserted shifted 120 physical degrees (also known as mechanical degrees) into the stator. Actual generators have a lot of windings for each phase, so they phase shift is less than 120° mechanical; you may want to read about Ferrari's theorem. What is true is that the output line-to-line voltrages are each shifted 120 electrical degrees from the other two.
We have hundreds in use, I usually change about 1 a week (dirty environment, heat kills them) I started wiring homes at 17, learned how to make electricity work, but at 58 I'm still learning "how". I converted my Lincoln AC220 stick welder to DC. I just picked up a 10hp 3~ air compressor, I'll be buying a VFD to power it from single phase!
Amazing explanation. Truthfully I'll have to watch it t a couple more times and take notes but still it's great.
Visual Learner Here!!! Thanks. Explanation is spot on. You make it seem effortless> I am booked.
I had a pretty good grasp on all of this except how the final A/C waveform was generated. Makes total sense to me now.
I work on vintage electronics in my side business and am about to move to a more complex industrial electrical maintenance role at my day job. It's always fascinating to me to learn about the things the modern transistor has enabled us to accomplish, but I'm also still amazed by what we were able to accomplish before that technology existed.
I'm an electronics tech, and have worked with these, and similar devices. But, I have to say that a young me would have loved to come across a video like this. The explanation was great.
Awesome video. Although I'm surprised you didn't mention CNC machines since it must be the single most common user of VFDs. The whole automation industry is founded upon the VFD to make variable speed, feed, interpolation, and control possible.
Variable frequency drives couldn't be explained any better than this. It's great to explain to the audience with the perfect video, animations. Thank you for video.
I was literally wondering about these and seconds later I got a notification for this video
Spooky!
Same here. Thank you Paul.
@@dayyk5897 Eureka!
😂
So Google literally reads your mind lol or more likely traces very well your browsing patterns....:-) Then you wonder who is thinking here - you or Google? LOL
This video gives a better depiction than my college years studying electrical engineering. I'm more of a visual learner and till now I didn't exactly understand how a capacitor smooths ripples.
Thats the best video i've ever come across that explains the VFD sequence of opertaion , good job man
This is just amazingly explained I am your fan sir😊
Superb video as always. I love to nerd out on VFD’s and Wye-Delta starters. Such simple but ingenious methods.
I have a degree in comp.elctr.engineering technology. Ive worked at Intel mainly as technician for installation and modification of semiconductor equipment in past 5 years. Ive recently applied at UPS for an opening for a Buildings & Systems engineer mechanic....Major work activities for this position include:
Troubleshooting, adjusting, and replacing AC and DC electrical equipment such as batteries, control stations, fuses, motor starters, relays, switches, timers, servo driven equipment, Programmable Logic Controllers (PLCs), photo electrical devices, transducers, Variable Frequency Drives (VFDs) and encoders.
Inspecting, troubleshooting, repairing, and/or replacing mechanical components such as motors, reducers, drive chains, sprockets, sheaves, pulleys, rollers, conveyor belts, bearings, and transfer plates.
Inspecting, troubleshooting, repairing, and/or replacing pneumatic equipment such as diverters, air compressors, lubricators, hoses, and coils.
Inspecting, troubleshooting, repairing and/or replacing hydraulic equipment such as hoses, fittings, cylinders, and pumps.
Welding equipment such as hand rails, conveyor supports, package handling equipment, carts, and grading.
Performing preventive maintenance inspections of plant equipment such as conveyors, bulk carts, and power industrial equipment.
I have to take a 25 question test onsight to be considered for the position. What should I know to be prepared for questions related to those duties??? Can you help me ?
Check our new Servo video out: ua-cam.com/video/1WnGv-DPexc/v-deo.html
Gonna have to watch this a few times to smooth out the gaps in my comprehension.
Just let it ripple through your mind. A canned answer is good for smoothing out the gaps. It all depends on what you are filtering - whether content or output.
I have learned SO MUCH MORE from UA-cam than I ever did in public school...
These videos are awesome. Kudos to the content creator. I have been in the trades for about 5 years and all the schooling I have received left me with gaps in explanations.
Thank you so much for the visual aids in helping to truly understand the basics of electricity.
I am a commercial hvac/r technician have been doing hvac/ refrigeration for 6 years love too learn new things want too get a bachelors in mechanical engineering and continue too grow my knowledge I have now been promoted too a facility manager position but kind of like the field more thank you for this explanation love all your videos great knowledge! Have worked on 3 phase motor control panels that send power too centrifugal suction end pumps 7.5 hp and 10 hp condenser and chilled water pumps for 2 racks of 100 tons of cooling each rack with 2 compressors in tandom and the 3rd on its own circuit. Also have a cooling tower we replaced the 25hp motor Baltimore also float switch repairs for fill valve of the condenser water great stuff did many commercial hvac service calls too many different hotels and facilities country clubs fascinated by hvac and mechanical ventilation and heating as well as kitchen equipment heating elements ovens.
See our new video on how to build mechanical versions of electronic circuits? Watch here: ua-cam.com/video/Zv9Q7ih48Uc/v-deo.html
Holy s**t!this video made me understand what I've been trying to learn for at least a decade.
It's 7:55AM. I'm happy I learned something new this early in the day
Amazing Video!
The animations and the content are perfeclty fitting together to make it understandable and interesting to watch, great Job again.
2 years of electrical engineering in college and this explains it better then any prof I had
New to the channel & I'm loving it, ❤️❤️❤️ Thank you for the amazing videos ❤️
Thanks for these videos. I watch these after class so i can actually understand. I pay thousands for electrical apprenticeship and the visuals, explanations, and graphics are better than what i have at school. If it wasn't for UA-cam id be failing school. Thanks for being exceptional. College now is a joke.
Careful around these, even unplugged you have to wait few minutes (capacitors will discharge) to operate them ( for example for maintenance purposes ).
Yes usually a 10min wait before attempting work!
Or you can connect a resistor to the capacitor for it to discharge quickly
Discharge time is equal to the resistance of the circuit multiplied by the capacitance or T=R×C if i remember my schooling 🤣
@@justinkern1804 how do you get C?
@@D1amondeyes capacitance
Amazing!! I've used VFDs. I've used diodes, rectifiers, capacitors individually. I've done some DIY AC/DC circuit design. Still going to take a few more views to grasp everything in the video. And then fixing my broken generator/inverter should be easier.
7:11 gives me the idea that I’ll be able to find simple inverter like the diy type in my ac compressor circuit board
Yes🔥
This explains it better to me, than my teacher does, and english is not my first language!
Is this how they control the speed of modern electric trains, and what is the swishing sound from the control circuits on rail traction
Generally, yes. The motors and inverters are a bit different in design due to the torque requirements (same in modern electric vehicles) but the same principle applies.
@@JakeRoeder Thanks Jake. and the swishing must be the fast switching of the huge current
I was wondering the same. Aspiring train technician here :)
Wow, if you had made these videos 20 years ago, I would not have had to go to collage to learn electronics. Just let you come into my computer and teach me at home. GREAT JOB.. and way more clear then collage books..
Collage is a technique of art creation, primarily used in the visual arts, but in music too, by which art results from an assemblage of different forms, thus creating a new whole.
How are the Harmonics controlled, that can be reflected back into supply, by using this process?
Filters and dampers which are just more advanced electronics integrated into the circuit. Maybe we will cover in an advanced video on the topic
A video on harmonic distortion would be awesome 👍
Normally, an inductor is connected just btn the rectifier cct and the DC bus.... It acts as a choke for harmonics
@@chrisnsamba4272 I know they sometimes do this,but it doesnt always work.When i've been involved installing 11KV VSD's, they do a Pre and Post Study. We also have to inform the DNO they are being installed, as it does cause network problems
The filters in VFD's arent efficient enough to block out all harmonics and when you have a bunch of VSD's this can cause a lot of harmonic distortion. To counteract this, passive and active harmonic filters are installed in the circuit and active harmonic filters in parallel with the VFD circuits work best to filter out any harmonics from the VFD's.
I used to specify VFDs in the 1970s. Then, both they and the wound-rotor motors they demanded were muy expensive, and so employed infrequently. I watch thru the years as the concept evolved until recent years when we use a few extra semiconductors and squirrel cage motors to achieve the same result. Good on us.
Holy crap, outstanding video!
And what a waste of April Fools Day. You could've announced "Electricity 2.0" or something. 😊
Great work again, cheers! AND STAY HEALTHY!
Glad you enjoyed. You're so right, wasted opportunity. I'll plan for next year!
I just stumbled across this video, Immediately subscribed.
As an electrical engineer, this is brain candy.
I can’t be the only one who read “A series of unfortunate events” and coincidentally stumbled upon this coincidentally convenient abbreviation, correct?
Im going at automation on high school and have a big task about Variable Frequency Drive. This-video-is-pure-fucking-AWSOME!!!
It's sad that I didn't have these explanations 15 years ago at school
Hah, they didn't even teach you how to do taxes nor find edible food in the wild, and now all they teach is how to wear a condom and believe what you see on the television...
Hybrid vehicles use a High Voltage battery then use the inverter to make 3 phase AC power to the drive motor. This video was a great way to see how the three phase AC becomes a variable frequency drive or VFD. Thank you.
Excelente aula, parabéns amigo.
I'm a chemical engineer so whenever I'm in meetings with the mech or electric engineers my eyes just tend to glaze over whenever conversations get into duty/support/standby blowers, motor frequencies etc. so this video was super helpful. At least now I'll be able to pretend that I know what they're talking about. Your PLC video is next so I can impress the panel guys with how not-rubbish I am at practical engineering
Sir, its too much explained, a child can becoming engineer after observing 5 times.
guess my age when i start watching this channel : )
Oops experience difference it's too difficult
*can become
@@46ryngd46 🤔
you never taught kids, did you?
I had never viewed such an amazing illustration in my life, thank you very much Sir
Superb. The difference between 'Explaining' and 'Describing'...
good tactic heh, i was sure there is an april fools joke in it somewhere and because i'm a beginner i wouldn't get it, so i paid extra attention
Next April, I'll get a fools day video out!
am from uganda and am so interested in this teaching leasons about vfd and am picking up slowly slowly ,very nice explanation
thank you 🙏 this is the level of depth I was looking for. When I was introduced to freak drives during my electrical apprenticeship, I understood, but didn’t grasp. The visual aides were mint! Cheers
Thank you Paul for this video. I'm trying to build a 25vac 3 phase 400hz supply for a Bendix HSI and this educational video is the kind of video I wish I had been able to see a long time ago. Your explanation is among the best tutorial I've ever seen on any subject.
I see the huge effort that was put into this video, nice work. I think an important part is missing though. I watched other videos about inverters too and none of them answered the crucial question: Where is the arbitrary target frequency coming from? What circuit produces just whatever frequency I need for the PWM to imitate? In another video I saw that a comparator generates the pulses by comparing a dense triangle wave and the target sine wave. But even that video didn't mention from where the target sine wave and the triangle wave are coming from. So how is the target frequency produced and changed arbitrarily?
Ever since I bumped into this channel few days back, it has been my favorite for quickly understanding difficult electrical & electronics concept. Watching your videos most times makes me think I've been wasting my time here in my university because ever since I've been an Engineering student here, I've just always been pressured in getting A grades in most courses & not grade A practical understanding of these courses. If I may ask sir, do you have any online course or training for Electrical & electronics that I can enroll for. I don't mind the payment sir
Wow! This explains a lot, I had no idea why an inverter was being used with an AC supply already. This answers my question.
This channel is so good. I watch these every day at lunch.
So, it has helped me a lot, I am new to electrical engineering, saved my time to understand the basic concept how it works.
WOW, really WOW! In my whole studying time I haven't understood this principle but your video was really really helpful! Thanks a lot!