Rotating Magnetic Field

[@genemische]

Fantastic, this is what the internet was made for

[@pocepaneamareco]

And porn

[@altuber99_athlete]

And memes

[@adekunleadebayo5094]

Best tutorial on RMF's for me by far. On a philosophical note, this video created sometimes in 2013 is still helping people 9yrs down the line. Amazing 👍👍

[@RoddyMcNamee]

You're welcome. I'm delighted that it was of some use and your positive feedback will encourage me to do some more. Thanks for that.

[@brandontucker6069]

Have you seen anything of sphere tires. Goodyear prototyped one that i knew of in 2015ish time. Would this be a logical was of manipulating a weight or some sort of mechanism to propell a ball or sphere in goodyears situation?

[@pointblankracer6274]

I left school without any exam results, mainly because of poor teaching, I understood exactly what you explained, So hats of to you.

[@KironKrishnan]

well described. For the first time, I saw a worthy description of the rotating magnetic field. Claps. :)

[@shahzaibshahid7275]

best explaination i had ever experienced...thank you so much..

[@mohitpatil7686]

Thanks! Best explanation about the rotating magnetic field. I am from not electrical background and I hated this concept but now I have a clear understanding of this concept. Cheers! Thanks mate! Keep it up!

[@ap-zone2349]

Sir I'm from India I was searching for this type material of machine since one month and I got awesome video of yours. very good and understandable video u have made... salute sir।

[@johnjohn-ne8fw]

amazing. u make it so freaking simple. clear and concise. not like those pretentious teachers. thanks mate.

[@satheesh.c4150]

Excellent explanation, very easy to understand, thanks

[@Zuwwar]

Very well explained. One point; the magnetic flux lines generated by phase 1 and phase 2 are separate fields and when you find the resultant, then it ends up with one magnitude and a direction that you showed. Additionally, if you increase or decrease the frequency you increase or decrease the speed (RPM) of the motor, and if you increase the number of pole pairs, you get the capacity the have more current draw and so resultantly produce higher torque. As I read on Quora; frequency is speed, current is torque, and voltage is the capacity to create torque.

[@dineshreddy9048]

Fentastic mind-blowing marvellous bro u cleared many doubts from this video

[@RoddyMcNamee]

Thanks for the feedback dlna4D, I fully understand your point. My plan was to do another video specifically on the induction and synchronous motor. I will get around to it, but I've promised to do one on generators first.

[@salahuddinmohammad2141]

Excellent. I see many video to understand RMF. This video is the Best among all video that I observed. Thanks Roddy to make it easy and clear to me.

[@duckman12569]

This is a good explanation of flux rotating with the current movement. I'm here because I bought a book on Tesla's writings.. I only have a pre-app in electrotech so I've next to no background.

[@bhavikshah5016]

This is gold... thank you for putting this together... best explanation that I was able to follow and understand.

[@valolo3747]

The explanation is very Good. Thanks for the time you put in.

[@MuhammadAli13]

loved it :D I didn't realize how a magnetic field can rotate.. it made this clear :D

[@sanjay.haldar]

Best explanation of rotating magnetic field

[@koushikkotra1421]

Now I understand what a rotating magnetic field is. Thank you very much

[@raszelast]

Really great video, you helped me to actually understand what is going on rather than just be able to prove it with formulas. Much of the time the math obscures the basic ideas of what's really happening, and you've really clarified the ideas well.

[@owaisgul7192]

It was you pouring it into my brain without any hindrance... absolutely fantastic...would love to see more of these videos. Doing awesome...keep doing more.

[@asheeshtripathi6108]

Why is the magnet's north pole is not towards the south pole of rotating field?

[@ismailmohamed2859]

I was shocked, amazed how this guy can explain very simple compare to any other channel who doing the same subject

[@RoddyMcNamee]

The 90 degree phase difference at the start is a property of a two phase supply. If it were a three phase supply, the phase difference would be 120 degress. I'll do a video on AC generation within the next 12 months if you wish. Thanks for the feedback.

[@robinfrancis789]

Sorry...I'm a bit lost here ( not an expert.....just trying to get my head around this) .....from where is the 2 phase supply coming from? In the UK we have a Single Phase Supply....am I right in assuming this is a Start and Run winding config?.....or split phase ? .gratetful for any guidance 🙂

[@RoddyMcNamee]

@@robinfrancis789 This video was only for instructional purposes to show how a rotating magnetic field can be achieved. In the UK, domestic electrical supply is single phase and industrial supply is three phase. To obtain a rotating magnetic field with a single phase supply, a capacitor is used to split the supply into two phases, 90 degrees apart, as depicted in this video. I have another video that tries to explain how the split phase works. You can find it here: kzbin.info/www/bejne/ppPKkIN8a7KHrbs

[@robinfrancis789]

@@RoddyMcNamee That's great Roddy....really appreciate your feedback and guidance 👍👍

[@Alex-wh2ud]

Excellent video; it really helped me visualise the magnetic field inside AC motors. However, I noticed that the rotating magnetic field and the magnet have the same poles facing each other. Shouldn't they be opposite so that the magnet's S pole follows, or is attracted to, the rotating field's N pole?

[@Alex-wh2ud]

Okay, I figured it out from watching your other video. You refer to the magnet's poles as "North/South seeking poles".

[@pythonfan3447]

This is awesome! The Physics of motors is really intriguing.

[@phongledu1535]

One of the best description I found. Thank you so much. Please keep up your great work

[@ranjithnarlapati7264]

Really very good, imaginable and easily understandable, thank you very much sir

[@fivosteren1382]

Simple with very clear graphics. Brilliant explanation. It would be nice if the same could be described for the 3pH windings

[@rishabhtripathi6828]

What a great description of rotating magnetic field..... Loved it.... Really awesome.... I guess you are a professor... If not then you must become....world needs people like you to teach upcoming generations.

[@RoddyMcNamee]

Thank you very much for the encouraging comments. The world needs more people like you encouraging and inspiring others.

[@RoddyMcNamee]

Hi Sal. I fully understand what you're saying but what the textbooks tend to show is the North Seeking Pole on the magnet (i.e the South Pole) following the North Pole of the Stator. So I've followed that format, i.e. the pole marked 'N' on the rotating magnet is really a North Seeking Pole i.e. a South Pole. This is exactly as you suggested. Thanks for the feedback.

[@ahmedosman9699]

Best description ever thanx

[@rks3kleuter]

well described. A very good desription of a rotating magnetic field. Thanx from Belgium

[@keirthomas2491]

Wow... finally a useful video! Long search, but worth the wait. Now if only he would have explained how the hell one is to do all this reversing of the magnetic fields and what not...I'm assuming there is a component needed between the power source and the motor, I just haven't a clue as to what it is.

[@enggind365]

The winding sense of top and left windings are opposite to that required to create the poles shown. Can you clarify?

[@ahmedelazazy7199]

i am really thankful for your demonstration you really clarify some concepts that i entirely don't understand thanks very much

[@ashishjha9961]

best explanation , i have ever had. Thanks Sir

[@RameshKeshavan]

Excellent Explanation and animation. Many thanks.

[@SharkWithADrill]

Aren't V & I only max at the same time in a resistor? Wouldn't these coils be an inductor?

[@giuseppesorrentino9864]

Thanks Sir, i got the concept behind rotating magnetic field

[@caink9142]

This is for RMF utilizing coils how about utilizing windings? Can you make a video for that?

[@manastripathi6013]

you made it look so simple. thank you

[@samarsico]

Roddy, thanks for the video, shouldn't the magnet that is placed in the rotating magnetic field have the north pole attracted to the south pole of the rotating magnetic field (and the south pole attracted to the north pole)?

[@kes2016]

This is a very precise and clear illustration of the concept. Thank you so much.

[@madhuridinakar4551]

I had a lot of doubts regarding the rotating magnetic field. All clear now!!! Amazing video! Helped a lot :)

[@daweima7098]

Nice picture added to help understanding.

[@JulianJawadAhmad]

What software did you use to do this video-- the graphics?

[@RoddyMcNamee]

All done in PowerPoint.

[@syedsarwarhussain7000]

First time I understood with such a decent explanation thank you sir god bless you

[@alexmannock3634]

Fantastic video Roddy! I am studying AC/DC motors and this is by far the best ive found so far!

[@VickysTuition]

Thank you sir. Beautiful illustration 👍

[@4shodarealest602]

Love the way you broke it down pretty simple I actually kind of get it. Only thing I would say is speak more into the mic, seemed like you were far away or with a low voice I mean so you could be heard better

[@alexchabanenko6347]

Thank you. This is the best video about magnetic flux inside single phase motor for me. Спасибо, это лучшее видео про магнитный поток в однофазном двигателе как по мне.

[@JulianJawadAhmad]

06:56 I think the physical magent put inside will be upside down, as the North attracts the South and vice versa. Take number 1 position, for example, when the rotating magnetic field of the stator is North, the South pole of the magentic bar will face it(the blue color).

[@RoddyMcNamee]

If you look down through the comments you’ll see plenty of discussion about that point. In short, if you hold a compass in your hand, the needle with N on it will point North as it is a North Seeking Pole, as opposed to a North Pole.

[@stevebakker6884]

I've been looking at a lot of AC motor animations as this is one of the best. Could you be persuaded you to a) make a 3 phase version, and b) add a part about how they currents are induced on the rotor. The 3 phase motor is getting talked about more and more in electric car circles like with Tesla, and avg. drivers are trying to educate themselves.

[@ShubhamMajmudar]

Thanks a lot ... Finally had all my doubts regarding rotating magnetic field cleared! Really awesome.

[@gkarthikraja1072]

Clear and simple explanation.

[@ln7822]

Thank you so much man. The video is done perfectly. Simple, interesting and visual. Much needed, thanks again

[@filigenzilab9613]

Any circuit diagrams for a two phase induction motor?

[@hubercats]

Very helpful video, thank you! One question follows: In the first 40 seconds you show phase 1 current flowing through two coils, one at the top and one at the bottom. You then treat the two coils as one, or so it seems. Doesn’t each coil have a north and south pole? It seems to me that flux from the south pole of the upper coil would wrap around the stator and “connect” to the north pole of the lower coil. Thanks, again.

[@RoddyMcNamee]

The two coils are wired in series, and yes each will have a north and south pole. The wiring has to be such that the direction of current in one coil is opposite to the direction of current in the other. Using the right hand rule, if your fingers point in the direction of the current, then your thumb will point in the direction of the North Pole. So, if you want the poles to point in opposite directions, then then direction of current will have to be opposite.

[@hubercats]

@@RoddyMcNamee : Makes perfect sense. Thanks again!

[@robertlefranc468]

How do you produce those 2 phases ? and How can you start your 2 phases, desynchronized like that --- the violet at it's maximum height, and the violet at 0 ?

[@RoddyMcNamee]

Robert, the 2 phases (90 degrees apart) are produced in a two phase generator. Alternatively, we could have used a 3 phase generator which produces 3 phases each of which is 120 degrees apart. There are probably some videos covering these topics on KZbin.

[@robertlefranc468]

Roddy Mc Namee Thank you Roddy !

[@sg8127]

well described video. It's clear information and enough to get principal rotating magnetic field. By the way, how can we set north and south using current direction? what's the parameter to get north and south reference in stator?

[@abdelrahmanmostafa9250]

great job.. well done ,could you please make a video explain the regenerative braking principle

[@robinfrancis2911]

Excellent and Simple.....makes perfect sense......thank you.

[@shubhampassi548]

Great explanation. But I have one doubt- Shouldn't the bar magnet shown at last have opposite polarity? I mean north of bar magnet should be attracted towards south of magnetic field and vice versa...

[@RoddyMcNamee]

Ok, think of it this way. When you hold a compass doesn't the needle with 'N' on it point towards the North Pole? It's the same here. The N on the rotor is a North Seeking Pole (i.e. a South Pole) just like a North Seeking Pole on a compass.

[@صيانةالسياراتعلموخبرة]

so we can name this"resultant rotating magnetic field" in single phase motor this resultant is zero at starting so we need auxiliary winding to star the motor .....right?

[@RoddyMcNamee]

Yes. In a single phase motor you would need an auxiliary winding to start the motor. I have another screencast on starting a single phase motor.

[@صيانةالسياراتعلموخبرة]

@@RoddyMcNamee thank you

[@aayush-zw1mx]

Is this a single phase motor?

[@kanhu399]

Great video. Good explaining. Nice work.

[@rishabhgupta3516]

Great video!! explains thoroughly the concept of rotating magnetic field..

[@19nrl95]

You made this so easy to understand, thank you!

[@alessandrogaziano4703]

Excelent video! Now i'm just gonna ask you: what about linear synchronous motor based on a trifase current? I'm trying to understand how this system is used to launch roller coaster. I already know that the principle explained in your video is used to attract the veichle until it is passing trough the coils, and repulse it after it passed it. But my question is: if the veichle is accelerating, how can the LSM change the speed with which the magnetic field change? My insight tell me that it should work slower in the first part of the acceleration and faster when the train goes faster, but how is it possible if the frequency with which the current changes is fixed? Thank you so much!

[@geovanysinlao8934]

7:13 like pole repel, unlike pole attrack, it should follow the rotating field with its opposite polarity

[@RoddyMcNamee]

That is why I said one is a North seeking pole and the other is a north pole. On a compass, the north seeking pole (with N marked on it) of the needle points North. The same thing here.

[@reetikasuneja4012]

you have made this really easy to understand...thanyou !!!

[@tirionlanaster2626]

Is this magnetic suspension?

[@stalinsubbiah3238]

What is an pole in a Electric Motor

[@saulmendoza1652]

Excellent explanation!!!

[@lacerdafelipe]

Thanks a lot. I was struggling to understand this from the book, its all clear now.

[@robertkemper4990]

Excellent description! Is this the same as a time based magnetic field?

[@RoddyMcNamee]

+Robert Kemper Yes

[@iamswastik]

Excellent explanation...

[@shvideo1]

Magnificent explanation. Thank you!

[@lesyuc1655]

thanks so much! the best explaination i have ever experienced!

[@divyasharma6389]

only 1 doubt friend you say that north pole and south pole develop in phase 1 have you taken there direction assumingly or the direction has some reason?

[@RoddyMcNamee]

The direction is based on the right hand rule. If you grab a pen for example with your right hand, then if the fingers point the direction of current, the thumb points in the direction of the north pole.

[@bogdantita]

great video and very comprehensive. At min 7:00 arent the magnetic poles of rotor and stator supposed to align N to S? If not, please let us know the 'why' behind it. thanks in advance

[@RoddyMcNamee]

There is a North pole on the stator and a north seeking pole on the rotor

[@greggroessger]

Sorry about this but I have the same trouble with the north pole of the rotor attracting (aligning) to what is shown as a north pole of the stator. I think it's was an unfortunate oversight to an otherwise excellent demo. I.E. A north seeking pole should have an S on it.

[@RoddyMcNamee]

Gregg Roessger Thanks for the feedback Gregg and I understand your frustration with the north poles. The only reason I did it that way is because it seems to be fairly common to describe it as such in quite a few textbooks.

[@irajnoormanesh9805]

thank you very much I was wandering like this rotary field but now i learned it from you

[@MobileLinkr]

much thanks from Korea !

[@andreaff3395]

Clear and easy explanation! Great video, thank you very much!

[@aalm4485]

Thank you for your clear explanation!

[@roxanamihai1709]

Thanks a lot for this! I can finally understand the rotating magnetic field!

[@lovedeepsingh3129]

Best explanation.

[@sachinsahu4274]

awsome explaination thats how everyone should explain this hats off !!

[@ikeurban7379]

Why is it not used for power?

[@manuv5859]

Very nice video.

[@brendanzotto1239]

What happens when the phases are becoming less and less positive, or lower magnitude positive or negative cycles. Wouldn't an emf and magnetic field be produced to resist this change in decreasing magnetic flux?

[@justadreamerforgood69]

That's only for induced emf not something directly connected to a voltage source

[@johnsonkibocha]

Great explanation

[@samirpatel6813]

Nice Explanation, Thank you

[@pruthvirajdara3817]

really helpful and easy to understand... thank you...

[@gnarmy321]

Great video, easy to understand, thank you!

[@ChromeBullet007]

Really helpful explanation. Thank you so much.

[@m0osebeard]

Very clear. Excellent. Thank you

[@griffinmukiz1398]

Best explanation ever seen