AC MOTORS
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- čas přidán 13. 05. 2019
- AC motors are some of the best motors out there, used in electric cars, drones, etc... I LOVE'EM!
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By: Mehdi Sadaghdar
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#ACMOTOR #Induction #PermanentMagnet - Věda a technologie
6:49 Finally got an alarm ringtone to wake me up XD
It's so terrifying, you can wake up literally everything with that ringtone
Lmao
its art
Yello - Oh Yeah You guys are welcome
I feel like there should be an explosion at the end.
0:11 Lose wires. Avoid them
4:08 Remix time
6:49 ElectroBOOM Ringtone
I actually jumped with shock at 11 seconds...
Ringtone is on repeat and I am vibing.
In 0:11 i laughed really hard with his scream...
do any of you remember where the ringtone is from?
the first video of it
0.11 that scream XD
8:40 That is called "skew angle", it helps to have a smooth interaction between the stator conductors (in straight slots) and the bars of the squirrel cage, thus avoiding torque pulsations
Well said. Just for a novice like me, I compare this to a common skew gear, where smooth transitioning of acceleration and deceleration happens (Torque readily engaged with no catchup.)
@francisco de los santos arana , esta claro que hablas español
@@badblenderanimations1449 más claro que el agua ;)
@@pkraj Does it have mustard at least? 👀😅
nope, the main purpose of skew is to avoid magnetic locking, the torque pulsations happen only during the start and does not affect the steady state running conditions, therefore skew is used to avoid magnetic locking and avoiding torque pulsations are just added bonus
That piano background music by his daughter ElectroCUTE is awesome
I agree
What song is that
Kaizer Patricio Oops I also don’t know
@@GavinLiuranium Maybe its original?
gabsr Yeah could be
If Tony Stark had mehdi in his cave both would be dead
Great comment, my friend! LMAO
LMAO
Thus, it would mean Thanos would be victorious.
I got you to 111 likes
You are welcome
😂😂😂😂😂😂😂
Here is the comment he mentions at 8:48:
The currents flowing in the squirrel cage consist of a basic frequency and multiples of that same frequency (harmonics). Whilst the basic frequency current creates the torque, the harmonics produce various negative effects like Vibrations, a ripple in the motor torque and problems when starting the motor. To reduce the harmonics a special winding technique for the motor coils is used.
By angling the rods the effects of the remaining harmonics are further reduced.
The exact angle needed to reduce the relevant harmonics depends on the number of slots and their spacing.
You mean angling the slots acts kind of like a low-pass filter?
But why does it reduces harmonics?
I meant how
What? I thought it was done to prevent cogging when number of stator slots equal rotor slots.
Thought it was to reduce effect on torque of the remanant magnetic field of the rotor
0:10 a scream of a true man
6:49 Me when I tried to beatbox at my school's talent show
5:49 finger removal tutorial
5:55 is the thumb removal tutorial
Assassins wants to know your location
Yep that made me cringe. I have seen people who sliced halfway through their fingers when they were using a hacksaw incorrectly
Lol, shouted at my Laptop "Noooooooooo" jeez that made me cringe. Genius or mad man, I'm never too sure.
That freaked me out.
4:08 everybody gangsta untill the bldc motor starts flying
And shredding everybody's face
And attempts to pick that up again around 6:48 lol 🤣
Check racing drones accident for more xd. Imagine 4 of em flying at you 60+mph lol....not that i done it myself...
I didn't know there was an abbreviation for Blind [deaf and dumb] direct current motors.
4:06
4:08 literally rise of the machines🤣
Respect to all the discoverers and engineers who make these things work in our daily lives...
Praise them saint of Mechanicus
The names of these geniuses are electrical physicists
"Loose wires, avoid them." I need that on a t-shirt.
If that was made into a warning label on a shirt I would buy it in a heartbeat.
Same
With him beign shocked
Except that the t-shirt would have a colon (:) instead of a comma (,).
The rotor bars are skewed at an angle because -
1)to prevent magnetic interlocking between stator and rotor
2)to reduce harmonics in the torque
so basically magnetodynamics? (aeroodynamics for the magnetic field, not for air)
@@aron9forever yes, electromagnetic factors are the major consideration for that
Well guess who is going to learn magnetodynamics eventually through internet (me)..
i got lost at "magnetic interlocking"
Yes those are meant to cogging and crawling in Induction Motors
5:33 I laughed way too much at this
This guy is awesome ! He would make a GREAT teacher for an electronics class at a community college , seriously
Ds this days dont wants to learn, they want circus show
@@lucassol7418You know. Learning while having fun is the best thing you can have. Obviously not a circus but some fun in class can really get an impulse on learning
@@Blesbok-I used to have a teacher say “I can’t do a song and dance for every lesson” but that always felt like another way of saying “I don’t have the resources or support to make learning fun. Blame capitalism.”
4:07
He turns it on and it went straight at him
I’m dead XD
Detroit become human
cory complex
GASP
Deviant RC helicopter motor
@cory complex lol
Detroit:Become humans
Every time when Mehdi is holding loose wires I know he must shock himself
it's one of the laws of physics.
Every time I see him holding loose wires, I take off my headphones.
i jumped SO frigging hard in the beginning of the video that I literally fell out of my chair.
I was wearing headphones.
I guess you could say that it didn't "shock" you (;
Crxwz because it shocked HIM lol
How Mehdi still has all his fingers is a mystery. He is so brilliant, but the way he cuts things makes me so nervous! 5:38 get this man a vice!!!
5:47
Yeah, i would hate to watch him chop an onion. 😰
I know right? I was waiting for him to say something about that, especially with the jigsaw 😳
I love this guy! He always impresses me with his engineering skills.
It's finished !!
Bam bam chika chika phi phi fakham fakham blurrr blurrr
😂😂😂
Even if Ac Motor doesn't work
Tesla surely will be proud of presentation
Thanks , i was searching for the lyrics everywhere xD
i still get surprised every time he gets attacked by his experiments.
I respect this guy a lot
He is quite entertaining and fun
For me he is Pro teacher with actual practical doing in his video
6:46 when i finish my homework
So true
@@darkestone763 i agree
Yes
I agree
"Im going to americaaaaa"
Awesome video. We built an induction motor once in Uni. We realized that the -in this case- nails need to be isolated between one another and shorted only at the sides to increase the torque
The slots at an angle is called skewing the poles. It reduces bemf on the supply, but only implemented on large industrial motors. For something small, you'd want to to keep the slots straight to increase the bemf, ergo higher torque output for small motors. But this also brings additional problems like a jittery motor because the torque is so... uh "harsh"
6:47 this is how true engineers reveal everything...
How does a mosquito vaporiser works?
czcams.com/video/5wOfRestJOA/video.html
Why tho i dont want to know how a mosquito VAPORISER works
Just a video is you guys want to see just see bro.
Nothing else I've just started cause you guys interested in electrical
7:31 is how the engineers reveal troubleshooting problems.
0:11 how i react to my test result
😂
This is gold 😂👌
😅 😅 😅 😅
Plot twist: it was a pregnancy test
11 seconds in and you found a really good joke. Props to you my dude
I love your videos! really entertaining and informative. I'm watching it in our office and I am trying so hard not to laugh!
Great video. I learned a lot watching you. Even through some of the mistakes, The breakdown and ceaseless mental frustration humor really resonated with me
9:58 "Tesla would be somewhat proud" Favorite line in this awesome, hilarious, informative video!
I'm curious how Tesla even invented it?
@@bunnygirl8482 Tesla invented 2-phase (polyphase) motors. Mikhail Dolivo-Dobrovsky invented true three-phase motors
I'm not sure this is your jurisdiction, but could you do a video on the photoelectric effect? Many thanks, and love your videos.
hmm.. BS Physics. yummm
he might, and he can.
It might be a nice project to drive vacuum tube photocell/photomultiplier, they aren't that expensive (ones coming from old movie projectors) :)
@@elephant3109 how is it BS? The photoelectric effect is what makes solar panels work.
@@Super1337357 bruh lol
mr1337357 Bachelor of Science
Thank you for your explaining Sir.
Love what you do and how..laughed and learned.Thank you
CRH: Safety is number one priority.
Electroboom: 5:49 f**k that.
ElectroBoom has his own rules:
Safety is my Item Number 2, the first one is FUN *2 thumbs up*
czcams.com/video/D5vVmwsLtCo/video.html&t=178
@@BadMax02_VR So true man😂
@@BadMax02_VR What thumbs?
@@Markle2k look at the video link he puts up two thumbs after he said that sentence
@@BadMax02_VR Not relevant.
8:45 They slant them at an angle to reduce torque ripples. My lecture said “The slants are to reduce torque ripples, I’m not even going to get into it, if you take EEE367 next year we’ll cover it in more detail” I’m definitely not taking EEE367 next year, so I guess I’ll never know
I asked my prof about it and he said it reduces higher frequency harmonics in the eddy current which probably leads to reduced torque ripple
What school do you go to?
It also there to avoid cogging torque.
bro I really love this video because I'm learning how to put coils inside a stator and rotor and how to meet the Y120 for three-phase industrial motors... thanks for your teachings uWu
8:43 The conductors are often skewed (at an angle) slightly along the length of the rotor to reduce noise and smooth out torque fluctuations that might result at some speeds due to interactions with the pole pieces of the stator, by ensuring that at any time the same fraction of a rotor bar is under each stator slot.
8:41 Slots are in angled due to avoid cogging which is nothing but the slots of the rotor gets magnetic locked with stator slots... :)
I was browsing comments for this
Cogging In a shaded-pole single-phase induction motor?
Shirley, you jest. These things slip like crazy. Little chance of cogging.
Also to reduce torque fluctuations(?)
Do you remember record players from the 40's - 80'? Do you recall any "wow and flutter" while the record played? Yeah, neither do I.
Those were driven by little shaded-pole single phase induction motors ..
It's called skewing
0:11 i started laughing till death
Loose Wires
Avoid Them
It scared the shit out of me
IT: “try turning it on and off again” Electro: “hold my rectifier”
thanks for making great videos
6:49 NOW THAT is dubstep, Love you so much dude xD
Perfect👍 czcams.com/video/9vfovCbO1LY/video.html
Lol
8:42 "I don't know why they do them at an angle but I'm sure it has something to do with something you can find in the comments down below."
lmao
I cracked up at the subtlety lmao
So much CZcams comment awareness
8:44 I'll take a crack at this one.
1. The skew in squirrel cage was originally designed to help with starting of the induction motor when the number of rotor and stator poles was the same.
2. The skew is typically about one stator slot width angled distance from the bottom to the top (axially directed). Because the induction motor is asynchronous, it requires that the rotor magnetic field by out of synch (have a non-zero slip speed) with the stator magnetic field as it rotates around the stator.
3. This ensures that a torque is maintained between the rotor and the stator. The skewing ensures that rotor and stator poles never reach a locked or synchronous position with no torque - this condition can be one type of cogging (locking) of the rotor.
4. The rotor may slip in and out of this no torque position depending on loading characteristics as it rotates. Where the number of stator and rotor poles are not the same such starting torque isn't necessary.
5. But even in this scenario there may be cases where particular poles in the stator and rotor can align such that the fields are synchronous (i.e. no torque) the result is to produce torque ripple (i.e. variations in rotational force).
6. The torque ripple causes variations in the speed as the rotor is rotating. The rotor skewing couples (the flux from) neighbouring stator poles through the skew and ensures that the rotor continues to experience torque even if part of it is aligned synchronously (no torque) with the rotating field at one particular stator pole.
7. The ripple can also lead to injections of higher frequency harmonics as a result of the variably changing relative angle between the rotor pole and the stator pole fields. This then induces current in the stator field lines and injects it back. Potentially this can cause heating losses in the windings and increased noise of operation in the motor in addition to variations in rotor speed as it turns.
Main reason for the skewing is eliminate harmonics.
The slots are kept at an angle to prevent magnetic locking/cogging, in which the rotor's and stator's magnetic fields align each other, therby being locked!!
This is the real youtube content. So educative. Thx Mr. Rectifier
You are my hero ! Honestly I have the same type of personality, love you're content
>has expensive 3d printer
>uses cd case
Mehdi stop
Hmmmm...... Did you ever think because he wanted something transparent
That way he can see the magnetic fields, right
Also: TRANSPARENT PRINTS
Also time
it's because this channel has also educational purpose, it shows youngsters that you can make something, working prototype with cheap crap not "expensive 3d printer"
staweks true. But he uses a 3d printed support for the bldc motors
Also there are very cheap printers in comparison to the lulzbot
4:08
Nobody:
Rotor: FOOL, you’ve brought me into this world and let me free. Now you shall perish
Lol
LMAO😂😂
7:32 when I tell my sis that the black tablet is in a *loop*
I knew this would happen lol...I alway love watching you man.....
The reaction at 10:10 is probably the same that Faraday had when he made his crude version of an electric motor.
Keep up the good work.
Gordon Freeman watches ElectroBOOM, based
4:06 I would be a liar if I told you I never did that. I still have a scar on my neck. Remove the propeller before testing your motors guys!
Or glue it to some heavy plank or something
No!
Yes
if you still have your fingers thats good
You are my spirit animal!! Love your videos
I think the problem has to do with the coils not being aligned properly or close enough. I would recommend mounting the coils parallell to the stator and be more of an oval shape to create better contact.
4:07 almost needed a lot of stitches with that one. those tiny motors are no joke
You did it 3 days ago?
Sliced open my wrist
@@sujyotsharma4335 Whoaaaaaaa?
3 Days ago 🤔🤔🤔🤔
Can your power be learnt?
0:21 - the guy from Primitive technology!
I scrolled looking for this comment. Great channel!
Electro boom humor is so amazingly funny and yet so intelligent hope he keeps making these great videos I never knew I would be watching comedy videos about electronics and the engineering of them in comedy I think this guy is a one of a kind and he deserves many thumbs up
JFC man! Get a table vise and a DREMEL Tool! I dont know how youve gone this far without these two items... and with all 10 fingers, to boot. Amazing
9:46 that's the reaction they made when they discovered ac motors. for sure.
6:49 *Best Music Ever!!!*
Rotor bars are arranged at a certain angle to avoid clogging between stator magnetic field and induced magnetic field in the rotor😊
ECU's are called ESC's (electronic speed controller) when attached to motors like that for hobby aircraft
4:25 "Made in Canada. Really"
LMAO!!
You gay ?
@@BOT-fl3xh stfu homophobe
Lol
4:06 is how we invented drones
True
when you need to get to your victims because they didn't do their Spanish (joke on duo lingo bird icon)
@@WrathiaRavenhearst ikr BET U DIDNT EXPECT THE SPANISH INQUI
no jk i mean the lesson LOLOL !?
8:49 According to James Maxwell's theory on electromagnetic fields these fields are found in 2 forms: alternating magnetic fields or electric charges. In the first case, the electric field force lines start on positive end and end on the negative end. In the second case the force lines are closed like the lines of magnetic induction and are *twisted*. Thats why induction current is generated in unmoving conductor
10:48 If you turn something on and off it won't be working.
I’m currently going through electrical trade theory classes for my apprenticeship and have aspirations to eventually become an electrical engineers . I have to say , your videos help me understand theory basics much more than my classes ever could . Thank you so much
No elctroboom video is complete whithout him electrocuting himself in the first twenty seconds
Electrocuting means to shock to death. Since he's still alive, I'm thinking he's never electrocuted himself.
I think that was one of the few times he did it by accident. I mean, listen to that scream! Lol
Loading findargument.EXE
.
.
.
.
... Error argument not found
@@evilkillerwhale7078 your joking right? HE EXPLAINED ELECTRICITY CANT KILL YOU THAT EASILY
The angle for rotor bars is called skewing. It reduces torque ripple greatly, but also at the same time peak torque. It might have worked better with non-skewed rotor as more torque would have been available.
8:43 The angle is there, so that the magnetic field affects each resistant material(cage line) more smoothly. Passes along it if you will... The result of that is smoother transition: less stress on the city current, I guess. You can visualise it as a stepper motor with less jittery steps. Not an accurate visualisation, but good for understanding :-)
2:35 its not the magnetic field that cause that roll on, its the air that produced by your driller.
Get some help 🙂👍
Go get you brain checked and learn about eddy currents
This video proves free positive energy.
Because you always make my day.
I love your video it makes me happy
9:09 "Well I'm done with this"
Actually the rotor moved at 9:03.
6:46 when i'm going out of the exam hall
0:11 sounds like me when i see a spider.
Grow a pair
24ecko calm down buddy
@@24ecko oml lol
Correct
So the spider explodes I would be scared too
This guy makes me laugh and learn at the same time. That’s rare in my world.
8:45 my college says they're at at angle so that the bars can never be completely aligned with the magnets. When they're slanted, they're constantly out of allignment which promotes motion
Correct, it is to prevent ‘cogging’ which is magnetic locking
4:07
That Motor went right after that glorious unibrow.
Protect the unibrow!
You know you learned a lot from Electro BOOM when loose wires give you intense anxiety.
Relatable
Damn true
Lmao, government electricians in my city leaves disconnected and broken wires(naked of course) hanging 5 feet above the ground just to give fking heart attack to the people walking in nights.
Went straight into the drain with my bike when that wire hit my face.
Yeah.... I knew he was gonna do it
I love how everything is messy and still works... So relatable.
you should get a 1950s lionel train and explain how it all works, e unit, ac motor and everything else in it, they are amazing pieces of engineering
8:44 I'll take a crack at this one.
1. The skew in squirrel cage was originally designed to help with starting of the induction motor when the number of rotor and stator poles was the same.
2. The skew is typically about one stator slot width angled distance from the bottom to the top (axially directed). Because the induction motor is asynchronous, it requires that the rotor magnetic field by out of synch (have a non-zero slip speed) with the stator magnetic field as it rotates around the stator.
3. This ensures that a torque is maintained between the rotor and the stator. The skewing ensures that rotor and stator poles never reach a locked or synchronous position with no torque - this condition can be one type of cogging (locking) of the rotor.
4. The rotor may slip in and out of this no torque position depending on loading characteristics as it rotates. Where the number of stator and rotor poles are not the same such starting torque isn't necessary.
5. But even in this scenario there may be cases where particular poles in the stator and rotor can align such that the fields are synchronous (i.e. no torque) the result is to produce torque ripple (i.e. variations in rotational force).
6. The torque ripple causes variations in the speed as the rotor is rotating. The rotor skewing couples (the flux from) neighbouring stator poles through the skew and ensures that the rotor continues to experience torque even if part of it is aligned synchronously (no torque) with the rotating field at one particular stator pole.
7. The ripple can also lead to injections of higher frequency harmonics as a result of the variably changing relative angle between the rotor pole and the stator pole fields. This then induces current in the stator field lines and injects it back. Potentially this can cause heating losses in the windings and increased noise of operation in the motor in addition to variations in rotor speed as it turns.
This guy really did a long comment well done😮
7:05 It sounds like a air raid siren from WWII
Cursed Carter lol
the angle of the slots to make the reluctance of the armature low and it helps it to spin much better than it without angle
I am so obsessed with these videos of ElectroBOOM that I watch the entire sponsorships, lol
"loose wires; avoid them" and I live by that
avoid anything loose in general, girls too...
This is really off topic, but I want to thank you for all the content you put out and I really love how you combine humor with information. I started my study electrical engineering this year and I came in contact with the Keysight IoT challenge because of you. I had a lot of fun working on it and I learned a lot. So I want to thank you for all the effort you put in creating content and creating such a nice and informative platform ❤️
Skewing of rotor cage is to avoig cogging. That is maggnetic locking between stator and rotor. Basically the the rods of squirel cage rotor is like a magnet and the stator slots are also magnets and somtime they can lock together or create pulsating torque.
this guy is phenomenal, very good
0:06-0:14 I saw that coming
6:49 i want this as my ringtone. surely im not the only one!
Reeve Kook I know right?
Bam bam chick chick Bibi bhakkam bhakkam blllllllllll bam bam kich kich kon kon
Electroboom: ECU
All the RC plane builders turning in coffins: ESC! (electronic speed controller)
5:39 Tutorial how you can cut your Finger off in under 2 Min😅
When did "finger" become a brand?
It took you exactly 11sec to shock yourself,love ya for that man
Is this real or just an effect? 🤔 i really can't tell, looks so real
@@oSJmee
It is real. It's just he do them on purpose as he knows what will kill him and what will ALMOST kill him.
damn, 11 is my favorite number! Im proud of him.
The day he didnt uploads anymore we know what happened...
pls no
R.i.p
I know that was a joke
@Baba Yaga Like with the hacksaw at 5:49? Even the most intelligent idiot has accidents.
Colinfurze once burnt his arm and many times got small injuries - he will once cut off his finger...
He shd be dead by now
8:50 Squirrel cages don't necessarily NEED angled squirrel cage laminations. It has to do with reducing and balancing the eddy current
8:43 they made them in an angle called as Skew which inturn reduces the humming noise.
Come for the educational commentary
Stayed for the swearing and self electrocution
0:10 Right?
6:33 That is such a good sound, wish I could get a sample of that without the background music
I saw your comment and thought that was a really nice sound too. I was bored and decided to grant your wish. I ran it through Audacity and this is the best I could do. If you don't want that noise at the end, I can remove that too.
drive.google.com/file/d/1xM523p0gS6i_AO_rMBMZor7bEsjKgdNP/view?usp=sharing
8:35 electrical enginees know this it is called skewing...
With skewing, the rotor conductor length increases and the cross-sectional area gets reduced. The increased resistance improves the power factor of the rotor circuit and improves the starting torque delivering capacity of the motor.
Hi Medi, I really like your videos, I have a question, how do you get rid of the buzzing noise of a power transformer of the digital receiver?
is clear wood finish found at home depot or similar shops, a good option to fill between the transformer core iron?
any suggestion is highly appreciated, thank you