Best explanation I have ever seen for starting single phase AC motor. Impressed that you also covered the variations of starting systems. A little louder would have been good, but my thanks to you for helping me.
@yagof6365
Жыл бұрын
A little louder would have been good [2]
@unclemike8467
3 жыл бұрын
Watching this makes me wonder why I've never seen this concept explained so clearly before? You make it so clear and simple!
@VicCarter-c3b
3 ай бұрын
Hands down, the best explanation of how an AC motor works! I'm a visual learner and that was clear as day!
@michaelslee4336
6 жыл бұрын
Hands down the best explanation of this I have ever come across. Love the capacitance slider to achieve 90 degrees. Thanks.
@igochukwuogunka570
9 жыл бұрын
You did it, you killed it, you got the explanation well easily explained with the basic/fundamental Electrical & mathematical principles, without complexities. Well presented! Thanks. More of such
@victoralejandro3460
6 жыл бұрын
You realize that same polarities reject, right?
@hrithikjain1806
5 жыл бұрын
Lol this means you didn't understand it properly ogunka
@bernardocisneros4402
10 ай бұрын
@@victoralejandro3460His explanation of polarities was the only mistake he made. Everyone knows opposites attract.
@willgreen5023
2 жыл бұрын
Good video. Filled in some blanks in my mind on what is going on with a capacitor and AC motors and what they do.
@sbitschy
4 жыл бұрын
I have probably seen hundreds of images, diagrams, text explanations and videos and none of them made it 'click' for me. Your video did it. It was simple yet well detailed. Thank you!
@vmukal8430
7 жыл бұрын
Thanks for a very clear and definitive presentation - your graphics helped a lot. I especially liked the one where you increase the capacitance with the "slider" and show the effect on the vector and field windings diagrams. Great job!
@CharlieTechie
8 жыл бұрын
Excellent video except for the very low audio. Also as pointed out previously, opposite poles attract, similar polls repell, not what the animation is showing, otherwise one of the best explanations I have seen on KZitem.
@BuddhaSource
4 жыл бұрын
I watched many animated videos but this one explained the best. I now know what happens. Thank you. lol won't forget your voice.
@nodriveknowitall702
8 жыл бұрын
Awesome. I don't know how many times I've looked this up over the years. Your explanation along with recently looking up an example of a person using capacitors to get around a split phase supply to make a three phase motor to work has finally made this "click." Thanks.
@apollogenerator9837
3 жыл бұрын
Fantastically done, was searching for ages on how to make a DIY single phase AC motor, couldn't find anything i understood until i stumbled across this, hats off to you!
@MuhammadQasim-nm3jl
7 жыл бұрын
explained so well and in such a simple way, I got everything even with such a low volume. Thanks for delivering
@IQUBALKHAN-oj8jd
9 ай бұрын
Respected Sir I have watched all videos regarding this topic, but trust me, i have never found any video that is better than you. Thank you so m😊uch explaining this topic in a very simple way
@Mazasi1
2 жыл бұрын
Its amazing that many other videos have fancy animations which somewhat help to understand this concept, but this "roughly" but very clearly drawn presentation really helped me to understand it! That CIVIL is great to know, never heard of it.
@hearthawaii23
3 ай бұрын
I spent a while looking for a good explanation of this. This is a great explanation! Thank you!
@nizarbenayad5247
2 жыл бұрын
thank you very much men, this is the best explanation I have ever had for this subject. May God bless you.
@eduardocontreras3878
Жыл бұрын
Excellent explanation. Most videos dont really show the mathematical model behind monophase motors and just give a qualitative explnation. I find it much easier to understand whats happening when you use phasor and how each current and voltaje quantity are out of phase
@warpiwarpi3533
2 жыл бұрын
Thanks for great video but please annotate that similar magnetic poles repell and different attract.
@mohithhassan3154
7 жыл бұрын
i have watched many videos with and without animation but by graph and 2D explanation i understood it very well. very good way of explaining the concept
@alishalhoub4664
3 жыл бұрын
excellent explanation and perfect presentation skills. Keep me updated with any further videos .
@HistoriasyConfesionesdeReddit
4 жыл бұрын
Finally after 5 vids I understand why they need a capacitor thanks
@adiftnoah7032
4 жыл бұрын
Help me sir, why do we neee capacitor here?
@academiadaeletricidade
11 ай бұрын
0:45 North of the magnet is not being attracted by north of the magnetic field. Them repell each other. Excellent video!!
@charleslyell3748
9 ай бұрын
And he repeats the same mistake at 1:08.
@academiadaeletricidade
8 ай бұрын
@@charleslyell3748 I made a video on my channel! I’ll translate it to English! I correct this mistake on my video!
@timberry9625
6 жыл бұрын
Thank You! I've wanted someone to explain how this this works for a long time! I understood that it was needed to start the directional motion but didn't understand how or why!
@KAFKUBA
3 жыл бұрын
Best explanation I've seen!
@vachaspatishukla2407
7 жыл бұрын
Excellent Elaboration of a single phase motor.👍
@semihsenyuz7436
2 жыл бұрын
Excellent sir, Thank you , Good Luck.
@danielruditapurwanto8740
Жыл бұрын
First of all, I want to say thank you for the best & simple explanation video.. This single video has almost everything I've been looking for about single phase induction motor. Second thing, if you don't mind, please explain a bit more about winding direction in relation with the electromagnet poles created. (I.e. in L1 or L2, what happend if half of the coil winding is in opposite direction. Half Clockwise and half CCW) ??? Thanks in advance.. 🙏🙏🙏🙏🙏🙏
@hummingpylon
9 жыл бұрын
Very good explanation, as a slow person I should know.
@arie1293
7 жыл бұрын
Thank you for this explanation! I recently discovered single phase brushless when I took apart a three wire projector fan. My projector has gone through two fans now (8 months apart) and throwing fan speed errors again. The fans still work but after 10 minutes the projector throws a fan speed error. I think the projector is running the fan at too low voltage causing premature failure of the tachometer signal (hall effect sensor circuit) or is wearing out other circuit components and the fan is truly running slower than it should. I'm hoping to gain a better understanding and hopefully fix or re-engineer the projector to stop going through fans. The projector is BENQ W1070. If I run the projector in "high-altitude mode" it runs the fan at high speed and it doesn't get the error but is so loud I can't enjoy using the projector. Oh, I should add that it only has two wires but four poles on the stator. Perhaps the capacitor is hidden on the stator somewhere to avoid having to solder four wires to the circuit board. I'll have another look when I get home from work.
@bhavikshah5016
4 жыл бұрын
This is awesome... I am trying to fix my table fan which wont start and I believe this is the same phenomenon that works for table fan motors... I have checked out the start capacitor charges and discharges fine, which leaves me with trying to get to the thermo fuse which I believe has blown out...
@sunshine7453
6 жыл бұрын
Beautifully explained graphically. Thanks!
@Elcosmicstar1
3 жыл бұрын
Beautifully explained.
@OziBlokeTimG
2 жыл бұрын
Your the best.. nice work.
@waelfathe9909
10 ай бұрын
Best explanation ever
@robertd1965
3 жыл бұрын
Thanks Sir.. this was nicely explained.
@beekeeper59
8 жыл бұрын
Please fix the volume!
@nicknamednickify
9 жыл бұрын
I could hear it okay with the headphones on, but not through my speakers. Terrific explanation, though.
@jalburty
10 жыл бұрын
The reason I ask is that I think I have a two phase motor like the one in your video. It came from my old washing machine and I'm using it on my (corded) A/C electric mower now, but need to reverse the rotation for the blades to cut the grass. I've turned the blade upside down as a temporary fix, but would like to know if the motor can be reversed. Thanks.
@891alonso
8 жыл бұрын
best explanation I've seen so far, deserves more views. Keep making more videos. Cheers.
@falco4489
6 жыл бұрын
Beautifully explained. Thank you.
@justthinkalittle8913
4 жыл бұрын
This is a wonderful video.
@tughantr06
2 жыл бұрын
So, one question just popped-up in my mind. Is is possible to create three phase from a single phase supply by using two different capacitors that has correct capacitances?
@sudheerkumartarapatla8839
7 жыл бұрын
awesome explanation very good
@Okie-Tom
4 жыл бұрын
Very good demonstration. So what you are doing is using the capacitor in the start windings make the motor start like a two phase motor! Correct?
@RoddyMcNamee
4 жыл бұрын
Okie-Tom yes.
@venkatesans3893
2 жыл бұрын
whether there will be a different in starting and running winding current?
@mohamedelghazouly6564
6 жыл бұрын
the best explanation ,thank u so much ,but i hope you fix the volume
@manishyash92
8 жыл бұрын
Good. Missed one basics there may b unknowingly... Regarding magnetic poles property 😊
@adhil8918
4 жыл бұрын
Yes not correct
@RoddyMcNamee
4 жыл бұрын
When you hold a compass in your hand, what direction does the needle with the N point towards. Same applies here. The North seeking pole points towards the North Pole.
@beardedsparks2825
4 жыл бұрын
@@RoddyMcNamee No it doesn't. wtamu.edu/~cbaird/sq/mobile/2013/11/15/why-does-a-magnetic-compass-point-to-the-geographic-north-pole/#:~:text=When%20it%20comes%20to%20magnets,to%20the%20geographic%20north%20pole.&text=The%20geographic%20north%20and%20south,rotation%20axis%20intercepts%20earth's%20surface.
@mirmuneerhussainiamachange2862
9 жыл бұрын
Beautiful !!!!.................................... Simple n Clear !
@phamthuan4970
4 жыл бұрын
Thank you so much pro! :) It's very clear and easy to understand!
@jlambo4473
2 жыл бұрын
Great job buddy
@Zapo9668
4 жыл бұрын
Would the motor where the start cap stays in, be stronger than one where it kicks out? Is this not essential some form of a multi phase motor? Its just tuning single phase into 2 phase?
@adamsacad8265
5 жыл бұрын
very awesome explanation like it .
@salehfarman3879
6 жыл бұрын
Since BS 7671 requires that all machine cannot automatically restart in the case of power normalise after an outage, it means need to install a start / stop push button, with the start button to be electrically latch in parallel to NO relay of L1? Correct me if i am wrong. Thx man
@subramaniyamdas7688
8 жыл бұрын
Why current leads in Capacitor & Lags in Inductor and how does it affect the motion of motor?
@RoddyMcNamee
8 жыл бұрын
+subu das Have a look at this video on power factor correction. It shows how a capacitor can vary the phase angle of current going to a motor.kzitem.info/news/bejne/pYmtx3d9i5x4f5w
@markrenton1093
6 жыл бұрын
I have a single phase 110v a.c. motor and I would like change rotation could you assist me with it?
@jacklife7165
8 жыл бұрын
how do you determine whether or not a motor needs a start or run capacitor, and how to you calculate the amount of farad's each capacitor requires?
@Kyle-pl6rl
7 жыл бұрын
Is the direction of rotation determined by the layout of the axillary windings?
8 жыл бұрын
Excellent explanation!
@howardtoob
9 жыл бұрын
This is an excellent explanation in my opinion. Is there any way you could do a description on how a brushed AC motor starts/runs?
@RoddyMcNamee
9 жыл бұрын
howardtoob Thanks for the comment. When you say a "brushed AC motor" do you mean a synchronous AC motor?
@howardtoob
9 жыл бұрын
Specifically a central vacuum motor which, I think, is a non-synchronous universay motor???
@aliusef2912
Жыл бұрын
thank you this was very helpful
@hooperwille
10 жыл бұрын
You made the best video explaining how to start single phase motor. So in theory you can use various size start capacitors which will create phase angle different than ideal 90 degree, but until there is enough torque motor will start normally? I am asking because I have motor with missing start capacitor and I don't know which value to choose. Is there any formula to calculate capacitor value from windings resistance maybe?
@RoddyMcNamee
10 жыл бұрын
You'll need to know the inductance of the winding as well as its resistance. If you look at this video kzitem.info/news/bejne/pYmtx3d9i5x4f5w it will show you the formulas and how to determine the phase angle. Hope that helps.
@bluered1322
5 жыл бұрын
Im replacing a refrigerator condencer fan motor because it stopped starting on its own and I realized it will start every time if it stops in one position say verticle for simplicity. If it stops horizontal I have to turn the fan 1/4 turn so it's facing verticle and it will start again. Does anyone know why this happends? I know it isnt repairable in this case just very curious.
@seeithappen1
2 жыл бұрын
So why do we need a Starter capacitor and a Run capacitor in a fridge ac compressor motor. There is only need for 1 capacitor.
@IRVPIANODRIVER
6 жыл бұрын
Thank you for concise and easily understood explanation. I have motor where capacitance is removed from circuit with relay. How is this accomplished? Thanks again, Mark
@RoddyMcNamee
6 жыл бұрын
IRVPIANODRIVER probably a centrifugal switch.
@jalburty
10 жыл бұрын
How do you reverse such a motor? Is it called a "two phase" motor with the second winding and capacitor added? What is a "split phase" motor? Which is more common? Thanks.
@RoddyMcNamee
10 жыл бұрын
Joe, you would need a third winding that also has a capacitor. The winding will be made equal and opposite to the second winding. I'll do a video on it to explain better.
@academiadaeletricidade
Жыл бұрын
@@RoddyMcNamee What is your 2D draw software?
@RoBD7
7 жыл бұрын
Great explanation.
@devilantony100
9 жыл бұрын
why are you using a capacitor , when you add two coils so that you can make it work automatically ?
@RoddyMcNamee
9 жыл бұрын
+devilantony krop The capacitor creates a phase difference between the two coils and thereby creates a rotating magnetic field.
@davidsmith-ke9kd
8 жыл бұрын
Thank you for making such as good video! All kind of single phase motors are need out of phase current in motor wiring(start&run) to start or keep running the motor in a AC circuit, right? in this full AC circle, i1 with i2 has 90 degree out of phase. from 0 degree to 90 degree, the direction of the current is from the AC source to capacitor, the capacitor charge from 0 to the peak. what about the direction of the current flow in i1 in the same period?
@436prasad
7 жыл бұрын
good explanation.really like it
@moonplant2489
5 жыл бұрын
very great explanation thank you
@bigknp6211
3 жыл бұрын
Hellow sir Well taking this concept and using 3 phase wire with 4 pole along with above top view of stator im bit confused as i couldn't relate. It would be grateful if you could make video on rotating magnetic field of 3 phase with 4 pole particularly.
@thong4011
6 жыл бұрын
Great explanation!
@limsk9580
10 жыл бұрын
simple and clearly explained
@georgelewisray
7 жыл бұрын
Nice Job, thanks to you I am starting to understand !!!
@AbdulHaq-tf5iy
7 жыл бұрын
A excellent explanation thnx sir
@ytrew9717
5 жыл бұрын
Thanks! Just one question: does the cap works only the first time (and then the magnet turn by inertia, or does it constantly give a push on the magnet?). On my fan, it seems to always work (there isn't any system to stop it). But in this case, why do we call it a starting cap? (what's the difference with a run cap?).
@RoddyMcNamee
5 жыл бұрын
Yes, it can operate for the first cycle and then once it has established a turning direction it will continue in that direction. This would be a starting capacitor. Alternatively, you could have a start and run capacitor that causes the motor to run at the start and stays connected to keep the motor running.
@ytrew9717
5 жыл бұрын
@@RoddyMcNamee thanks a lot for your reply (I watched the video for a 4th time and noticed you said it!). Seems you made the best video on this topic on the whole web, thanks!
@stephenwilford8149
3 жыл бұрын
Nice and useful but I think you changed the colours on the waveform diagram.
@MrPavan1982
9 жыл бұрын
hey man u r explanation very good why dont increase your volume , i cant hear your properly next time if u post any video, pls use a gud mic so that every body can understand,
@ABflanagan523
6 жыл бұрын
The run winding is much different than the start winding due to the value of inductance. Since the run winding is made to carry the larger current the resistance will be minimal as opposed to the start circuit where resistance is larger with a lesser inductance and the capacitor in series the will offset the phase angle from the start. In your video you made it seem that the two are both the same value of inductance.
@robinfrancis2911
7 жыл бұрын
Hi there....great video....a little quiet....but very good. Please tell me....I'm no expert, just observing, but in the UK we have single phs Live and Neutral. Your schematic shows L1 and L2 as with the USA. 1. Is this a kind of 2 phase arrangement with two different angles ?....is there a Neutral? 2. In an induction motor, is the Rotor always a magnet? I see many schematics showing just a coil of wire? Appreciate your clarification. Best Regards Rob
@RoddyMcNamee
7 жыл бұрын
This is a single phase motor. The second phase is artificially created with the addition of the second winding with the capacitor. This is how you would start a single phase motor in the UK.
@RoddyMcNamee
7 жыл бұрын
There is only one live and one neutral.
@RoddyMcNamee
7 жыл бұрын
With an induction motor, the rotor is not a magnet, but is a squirrel cage type. Current is induced (hence the name) into the rotor, and this current creates a magnetic field similar to a magnet.
@steventhehistorian
8 жыл бұрын
Good explanation, thanks for making the video!
@jameshansing5396
3 жыл бұрын
GREAT video. Very well and simply explained whilst still going into a decent level of detail. Great profile pic too! ;) YNWA!
@RoddyMcNamee
3 жыл бұрын
Thanks James. Good spot on the profile pic. YNWA.
@MotherRussiaisforever
Жыл бұрын
@@RoddyMcNamee Man, I am stuck with some really wiered AC motor wiring if you can shed some light it will be great. It is an extractor motor 240v and takes max one to 3 amps, But what is strange that after the electronic circuits it has six wires connected to the motor, the top three are connected to the electronic circuits but the other three are not connected directly to the electronic circuits at all. There is no continuity between the wires except two wires shows continuity but the wires that shows continuity one is connected to the electronic supply side but the other one is not and there is no continuity between any other wires, I took a new one that is working and tested that one and it is the same thing yet it works , i have never encounter anything like befor if you can help you will have my deepest respect. So far every has fallen on it ha ha ha.
@RoddyMcNamee
Жыл бұрын
@@MotherRussiaisforever does the extractor fan have variable speeds, e.g. a speed switch, if so, the extra wires may be for different windings of the motor relating to different speeds????
@MotherRussiaisforever
Жыл бұрын
@@RoddyMcNamee yes but there is no continuity except two looks like they have done through that electronic circuit separately will work it out no worries I work as an electrician this is the first time I saw some things like but no worries thanks
@jalburty
10 жыл бұрын
It seems like if you could invert the current to the second phase this would make its phase effectively lag that of the first winding's phase by 90 degrees, thereby reversing the rotation. Or if you could somehow shift the second winding's phase forward by 180 degrees that would also work.
@RoddyMcNamee
10 жыл бұрын
Joe, to reverse a two phase motor you need to reverse one of the phases. In your case you have, I expect, a single phase (split phase) motor. I say this because the domestic electrical supply to a house is generally single phase only. However some washing machines the motors are already wired to rotate in both directions. If you look at your motor can you see two capacitors? They probably look like cylindrical objects? If so, then you are in look and you just need to make sure the power is "split" from the supply to the opposite capacitor to the one it currently is connected to.
@rajeshkumar-jk1qb
7 жыл бұрын
Great explanation sir
@AbdulHaq-xc6th
7 жыл бұрын
Sir a perfect explanation.but just check your ckt diagram and noticed the position of capacitor an centrifugal switch ? I think it is wrong
@jeremythurston4092
6 жыл бұрын
Great job explaining this! Thank you
@obli8984
2 жыл бұрын
superb🙈❤️🤛
@OlumideAyeni
4 жыл бұрын
I can't thank you enough. Great job!!
@midju
3 жыл бұрын
There's another thing I don't understand. Let's say there's a heavy gear put on the motor and it needs 10 seconds to spin up to it's normal RPM. The AC current is always 50 or 60 Hz... As soon as the motor makes a fragment of 1 revolution, the current already gets to it's opposite value and the motor will slow down and get to it's start position. How the motor spins up in that case? The rotor must go forward/backward 50 times a second. That's the thing that I can't find on the internet, maybe because of my bad English or my thoughts are totally wrong.
@RoddyMcNamee
3 жыл бұрын
What I think you are referring to here is called "Slip". If you look up some videos on Torque / Slip for induction motors it might help.
@midju
3 жыл бұрын
@@RoddyMcNamee Thank you so much! I subscribed to your channel and clicked the bell too. 🤩
@apoorvsrivastava7121
7 жыл бұрын
okay good presentation the only thing I couldn't get is does the opposite pole repel plus why are u wishpering
@ScottESchmidt
3 ай бұрын
Good explanation, but you've got the magnet attractions backwards. Opposite poles attract, and like poles repel.
@robinfrancis2911
7 жыл бұрын
one last question.....is the motor in your schematic a 2 pole??....looks like it!
@RoddyMcNamee
7 жыл бұрын
It has 4 poles, or two pole pairs.
@robinfrancis2911
7 жыл бұрын
Many thanks Rob. I'm in Refrigeration and Air Con and we would class this as a 2 pole motor. We would add a potential or current relay.
@nakulankurmullam2982
4 жыл бұрын
Wow thank u dude Incredible explanation edit: btw what software did u use for explanation
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