An induction motor can work as generator without modification. it need external power supply first. but when it reaches Above synchronous speed. it start generating power.

@greatscottlab

3 жыл бұрын

Correct

@rahul-fl2zc

3 жыл бұрын

@@greatscottlab if you are going to try it with connected to grid then it will generate power at grid frequency (60 or 50hz) and if with capacitor bank frequency can be different.

@senorjp21

3 жыл бұрын

@@greatscottlab I think there may be a way to use capacitor(s) to self-excite induction motors? Not sure if this works without initial power.

@synchro-dentally1965

3 жыл бұрын

@@senorjp21 Robert Murray-Smith has video on this called "An Induction Motor As A Generator Without Altering The Motor"

@SaiPrasannak

3 жыл бұрын

@@senorjp21 this can be achieved by providing reactive power , usually with the help of a capacitor bank

Scott: "This gear kind of works with the bike chain." "I secured the gear with 2 zip ties." Me: *Screams in mechanical engineer*

@sfp4197

3 жыл бұрын

Beter than hot glue

@setrikaz9636

3 жыл бұрын

lmaooo same

@CaptainOverLoad

3 жыл бұрын

I felt that.

@chrisakaschulbus4903

3 жыл бұрын

"Me: Screams in mechanical engineer" it's always funny when people react this way... but i understand why more often than not stuff just has to work, no be perfect and beautiful. especially in a test setup

@prod.bymaxx

3 жыл бұрын

CHINEZU englez that would not work

Bike generator: a device that generates bikes ;)

@h3ogold478

3 жыл бұрын

Fleischwolf- it wolfs Fleisch 🍺🍺🍺

@h3ogold478

3 жыл бұрын

@@nageltermin725 kzread.info/dash/bejne/hYZ3u61ul8myn5M.html

@omtandon2741

3 жыл бұрын

In my school I got a question can you explain. Q-) Electric shock is caused by_____. . Electric current . Electrical potential difference . Electrical resistance . Electrical energy (Note you can choose only one option) Edit: Correct answer = Electric current PLS EXPLAIN 🥺.

@atalakeanumonarshi129

3 жыл бұрын

Edit : It's electric current because the amount of shock you get depends on the resistance and the supply voltage. It's I = V / R ( Ohm's law. ) Imagine you're connecting your 20 ohm resistor across 20 V. If your supply is current limited ( Constant Current / CC mode, ) the voltage will drop down but if your supply current isn't current limited ( Constant Voltage / CV mode, ) the current will remain high and could burn the resistor. And one more thing, DON'T BELIEVE THOSE " IT'S CURRENT THAT KILLS NOT VOLTAGE " CRAP THEORIES !!! Here's some videos to make you more understand the laws : kzread.info/dash/bejne/inialNChltu8qso.html kzread.info/dash/bejne/doOB1ZmmidDFqtY.html ( skip to 8:29 ) Sorry before. I write these comments on 2 o'clock in the morning, so yeah :-/

@twistah

3 жыл бұрын

good one

So happy you uploaded it anyway

@greatscottlab

3 жыл бұрын

I thought it was interesting enough for a video. So yeah, here you go :-)

So it turns out that you only wanted to make a thumbnail with that motor and bicycle tied together. CLEVER

@greatscottlab

3 жыл бұрын

Not really. I experimented a lot with the bike and generator setup but had to decide against it in the video.

@khayyam741

3 жыл бұрын

@@greatscottlab Yeah we know. Just wanted to tease you lil' bit😉.

@khayyam741

3 жыл бұрын

@@greatscottlab I think you should reconsider the magnetic assembly design and magnet polarities like I said in my other comment. Match rotor magnet poles with stator poles and also pole area. Do update us if there is any progress and about the process.

@AngelZaprianov

3 жыл бұрын

HA HA HA HA HA! Great point!!! I so the thumbnail, my first thought was "Great, A-Synchronous motor as a generator!" ... O_o and then he bought two !!!NEW!!! Induction-motors to prove he is wrong, OMG PS I'm not an electrical engineer.....

@prod.bymaxx

3 жыл бұрын

GreatScott! You know you can make some bike chaines smaller ..

you can turn an induction motor into a generator if you kickstart the magnetic field in the rotor by powering the stator at startup for a short time, this will generate residual magnetization which will self-excite the motor under load. i would love to see it in a video, thanks for the video 👍

@rahul-fl2zc

3 жыл бұрын

actually it will require continuous reactive power. if it is connected with grid or capacitor bank it will take reactive power from it. otherwise it will not work.

@medmsw2307

3 жыл бұрын

@@rahul-fl2zc yep i forgot about the reactive power source, 3 capacitors will do the job

@greatscottlab

3 жыл бұрын

I can put it on my to do list :-)

@gurupriyasukhdhami8227

3 жыл бұрын

Tesla model S already used this for regenerative braking

@alakani

3 жыл бұрын

@@greatscottlab I love this idea too, I need to make a pedal generator from a brushless washing machine motor to charge a battery+ultracapacitor bank pretty soon, ideally without opening up the motor

I like when creators and engineers like you still upload a video even tho you did not reach your desired amp output. Thank you Greatscott.

@greatscottlab

3 жыл бұрын

Fails happen. At least I learned something and due to the tons of comments I now have plenty of ideas to improve this concept.

LOVED how you dissected all the concepts behind the project!!!!! Best DIY Channel around

Damn you guy who commented that Scott heavily breathes after talking! I can’t un hear this now.

@valdisblack1541

3 жыл бұрын

WHAT HAVE YOU DONE TO ME??? WHY????

@maxwfk

3 жыл бұрын

i hate you...

@hydrotech6822

3 жыл бұрын

Noooooooooo!!!!

@replaceitem

3 жыл бұрын

His name isnt scott He said that in his lates question video

@sebascarra

3 жыл бұрын

LMAO true!!

I think that the main problem you had here is the number of magnetic poles you chose. If the stator has p = 1 (1 pair of poles, or 2 poles) your rotor needs to have also 2 poles. In this case, if you choose 8 magnets, you can put 4 adjacent magnets with the north pole facing outwards, and the other 4 adjacent ones with the south pole facing outwards. Otherwise, for each phase, a EMF will be induced in each coil but they will not have the same phase, so you can get them totally or partially cancelled. If you go with the 2 pair of poles motor, you can do the same, but creating 2 pair of poles in the rotor also. You can do that with 4 magnets of alternating polarity, or with 8 magnets, but you need to have 4 pairs of adjacent magnets that are facing in the same direction (Just to be clear, if you check the polarity of each 8 magnets, you will have: N N S S N N S S).

As an electronic engineering student currently studying 3 phase AC, I just wanted to say thank you. Your videos really helped me grasp the concept.

When we are able to admit our mistakes along the way of our progress,we are actually getting closer to the solution. We must not quit at these junctures. Our host in this video shares with us his downfalls and then the ultimate victory.Bravo. Also really like the handwritten detail for the ther side of my brain. Marvelous.Zippy

I’ve learned that you can use a capacitor to load the coils to generate a magnetic field to generate power and siphon off a bit to keep the field active.

You could try using a capacitor bank in order to supply reactive power to the system. Usually the responses get a bit better, but still, not great.

@nirodper

3 жыл бұрын

yes, this is NOT the way to turn an induction motor into a generator, a quick google search could show the way

@rahul-fl2zc

3 жыл бұрын

he is replacing rotor with permanent magnets.reactive power will be required if magnetic field has to be created from supply. so here it is not required.

@guilhermehenriqueschulz8589

3 жыл бұрын

Sure. I meant he could keep the squirrel cage and just attache capacitors to the stator. I believe it's a simpler solution and possible to provide better results.

@stephensu4371

3 жыл бұрын

adding capacitor bank is a good idea no needs to modified any part of the induction motor dont tell me to add magnet to the rotor, then you are making the induction motor into synch motor

@GreatScott, you're brilliant! I kinda love that this video was a series of FAIL, and you went ahead and posted it anyway!! Thank you for sharing so that your learning experience can become OUR learning experience. And I will see you next time!!!

Really interesting. I like how you break things down and explain the why's and test newer parts.

Hi Scott, any Induction motor can work as a generator. It only needs to be fed with reactive power ( via capacitors while running isolated). You may need to modify some winding connections though and no, grid is not required.

More accurate title: Turning Induction Motor to Permanent Magnet Synchronous Generator

@TheRambo010

3 жыл бұрын

pretty much this. the video is a total click bait

Thanks for drawing and writing. It adds +300 satisfaction points . Idea visualization through drawing is super motivating.

Love that you share your sucessful attempt and your failures.

You need to reduce the air gap between the rotor and stator. You'll see higher peak voltages after that.

@greatscottlab

3 жыл бұрын

True, but I think it would still not have output a decent amount of power.

@jansanagala8617

3 жыл бұрын

He Also need a better rotor he should reuse the original one and he could drill a lot of holes in it to fit magnets

@mdrolc

3 жыл бұрын

Yeah, that distance between the magnets and the coils looks like a big handicap to the whole thing. The dipole magnetic field is falling off with r^3. Or do you see another reason why energy transfer here was so bad?

@MrThecoco974

3 жыл бұрын

@@mdrolc The rotor need to be ferromagnetic to conduct magnetic flux better. Tight airgap and magnet back-iron will reduce reluctance of the magnetic circuit and inprove back EMF.

@jansanagala8617

3 жыл бұрын

@@MrThecoco974 👍

You can use it as an induction generator....by applying external low frequency excitation voltage...... don't need to put magnets.....

@sidamarali3030

3 жыл бұрын

That is problematic too. How to excite them?

@WideOpenChange

3 жыл бұрын

@@sidamarali3030 I think capacitors

@redsquirrelftw

3 жыл бұрын

Isin't the rotor basically just laminated metal? I don't think there are actual windings. When used as a motor it induces magnetism into the core which makes it spin because of the frequency change, and it lags behind a bit. There are some motor types that do have windings though then yeah you can add an excitation voltage. At least I think that's the case?

Best electronics basic channel on youtube. Keep up the content love your videos.

I feel your pain man, but solid learning experience. Thanks for the hard work

Pretty nice work, dude! Thanks for the video! 😃 Question: what about trying with a vehicle alternator? After all, it's used exactly as a generator. 😉 Anyway, stay safe and creative there! 🖖😊

@erygion

3 жыл бұрын

I said the same thing! Lol I hope he sees one of our comments and I'm sure others thought the same. I'd love to see a video like that.

@MCsCreations

3 жыл бұрын

@@erygion Absolutely! I'd love to see it as well! 😃

@harshanagasamudra6554

3 жыл бұрын

Car alternators work on a constant speed, its done by a governor... all this put together and you still have to reach the right speed... good option but not an efficient one

Put magnets in halbach array configuration so you can generate more power.

@gurupriyasukhdhami8227

3 жыл бұрын

That would be quite complicated for greatscott

@AnilSabaji

3 жыл бұрын

Why do all the circus, use it as an induction generator.

Damn ......... You put alot of efforts in making these videos You definitely deserve a 👍🏻💯 ✌🏻❤️❤️

I'm impressed. At least for your honesty. Other channels lie on the output of their projects.

Looks like the main problem was that your waveforms were not 3 phase, yet you had a 3 phase rectifier

Teacher - How does an induction motor start ?? Student - BRRRRRR...

i'm very happy this video was made. I asked about this exact concept in the induction motor video and now i can see this is completely a waste of time. :)

your handwritten lettering is very artistic , and is exceptionally good as it syncs with your verbal explanation . Superb presentation.

I wonder how well an automotive alternator would work. You can get some pretty high amperage alternators for a reasonable price (new or used).

@jamest.5001

3 жыл бұрын

It would be very difficult for a human to generate power with an alternator, about all a human can sustain for any time is about 100-200 watts, some may peak at about 500 watts for a short tine. But a alternator us in the 2kw range, it could be modified for less power, so you may as well use something more suitable!

@stevemorse5052

3 жыл бұрын

See my respose above for M D J

@raykent3211

3 жыл бұрын

If we take a convenient figure in james's sustainable range of 120 watts at 12 volts we get 10 amps. No magic can increase that. I'll assume that a decent car alternator is at least 80 percent efficient so thé max you can get is about 8 amps, nearly 100 watts. No point in paying for a higher power alternator, buy the most efficient one in spec and match the gearing to human pedalling speed, which can probably be done with standard bike gears. Probably already has. Buying the wrong device and gluing magnets to it to get one watt is daft. So yes, definitely, a decent car alternator unmodified is a good option, just arrange an appropriate gear ratio.

@brentvalentine

3 жыл бұрын

@@raykent3211 Hey Ray, I'm not sure where the 8 and 10 amp figures come from. I have personally seen a 120 amp alternator put out well over 100 amps when under load.

@vylbird8014

3 жыл бұрын

@@jamest.5001 I have used an alternator for a bicycle generator. I had to modify the electronics, but not the mechanics. If you run the field coil at a higher current than designed, you can run it at a correspondingly lower rotational speed. A bit of work with a PWM drive and flyback diode means that the current drawn by the field coil drive is only a fraction of that running through the coil itsself, making the whole thing reasonably energy efficient. You need a little power to start it, but get a lot of power once it's running.

Just 3D Print a sprocket for the Generator to fit the Chain 😆

It didn't occur to me that an induction motor can't be used as a generator, due to the lack of magnets on the rotor... But I was VERY surprised that it still sucked when you added neodymium magnets to it. I guess it's down to the windings, like you said in the video. You learn something new every day!

im currently working on close to the same project. i just use a hoverboard motor/bldc as the generator. and it works great. Im also glad you uploaded the video anyway. always entertaining content!

@joeria3276

Жыл бұрын

Hi, you mentioned using a hoverboard bldc motor. I'd like to do it that way too. What does your setup look like? Do you also use a bicycle? what is your transmission from your drivetrain to your motor? Thanks in advance

Try keeping a poll on your channel, so u get to know what kind of content your viewers like, maybe because of shifting in topics over a long time maybe u lost views. I'm just trying to help you, because u add a lot of effort to your video's and deserve more views. Great work.👍

The voltage that occurred in the oscilloscope is not a balanced 3 phase, because they are not 120 electrical degrees apart from each other!!!

@chewmonkey89

3 жыл бұрын

You've been watching to many KZread video's.

Woww amazing 👍

you are truly honest and creative man))

Why are the sinewaves in phase and not 120 degree phase shifted?

@BalaMurugan-hk2gd

3 жыл бұрын

Its not 3 phase motor. It is universal motor

Can u make a miniature bldc or induction motor ? For fun😂😂😂

@greatscottlab

3 жыл бұрын

I will think about it :-)

@valiza123

3 жыл бұрын

@@greatscottlab Running the induction motor on a Brushless ESC would be more fun.

@harshanagasamudra6554

3 жыл бұрын

Designing is the key

@stephensu4371

3 жыл бұрын

scott， can you make a 3 phase induction motor please like using 3D printer please？

Yeah, you need to feed both rotor and stator in order to work as a generator. They call it DFIG ( Double feed induction generator ) and it's widely used in eolic generation. Great video as always, greetings from Brazil 👍

great experiment boss, I liked it, thanks

Whoa! Did somebody say “Generator”? :)

@greatscottlab

3 жыл бұрын

Haha good channel name ;-)

@TheGitGuild

3 жыл бұрын

GreatScott! Thanks! :)

@thomasinwood4377

3 жыл бұрын

Only just noticed how early I am

@sandih2o

3 жыл бұрын

For sure😂😂😂

@banditnic8938

3 жыл бұрын

@@thomasinwood4377 Dude same 😂

Could a car's alternator work instead?

@harshanagasamudra6554

3 жыл бұрын

Yes but the speed matters

@stevemorse5052

3 жыл бұрын

Absolutely, but it is NOT an induction motor. The difference is that the rotor in alternator has an electrical winding (coil) on/in it. At a guess it could generate up to 40 Amps at 14.2 volts, which is 568 Watts

@MDJ5

3 жыл бұрын

@@stevemorse5052 I was meaning to ask if one would work instead of an induction motor, sorry if that wasn't clear.

@raykent3211

3 жыл бұрын

The device doesn't check to see whether it's being spun by a piston engine, team of horses or a human. Yes it will work and be far better than what's shown here if spun fast enough. Gearing. The video is misleading because he takes some parts from an induction motor and converts it to a different device badly.

I'll always watch your video, doesn't matter if its a fail or success. Keep being awesome!

Great video. Your not afraid to go into a motor and change things to see how it works.

Grog power cave. Grog make fire now

You could connect another motor to the shaft with a split-ring and create an electromagnetic rotor core.

That chain and sprocket combo 👌

Thanks so much for taking the time to make this video. I am planning to make renewable energy for free as part of my retirement plan, and your experiments have given me a great insight as to how I should proceed. In scientific endeavour, failure is just important as success, which means you have saved thousands of other humans time and resources by making this video. :)

"Stay creative and i will see you next time"

Great video, and great explain.

Hey Scott, I did it once with a single phase induction motor, just using a capacitor. the tank circuit excited the motor than it worked. I used a 1/6 HP motor, and sucefully powered 8 fluorescent lamps powering the motor with a drill.

Good video. Thanks!

Interesting experiment

Very help full bro

Strong spirit for research

hey !!! i love ur videos and i will save ur video to my idea list

You are awesome. Thank you a lot for the video.

My favorite youtuber.

Powahhh! Great vid!

Gute Arbeit 👍😊

Wow this is awesome 👍

Please make longer videos. I love it so much

@greatscottlab

3 жыл бұрын

Around 10 minutes is the maximum I can produce in a week.

@malharkhairnar485

3 жыл бұрын

@@greatscottlab oh don't take me seriously. I just get this "excitation" to study more about electrical and electronics from your videos that's all

thank you sir the information, i like your experiment, i love to do that but i have no time. but you did already, puting magnet to the rotor need only low rpm and created ac voltage . good job sir.

Sir i always wach your videos and tried some and they always work out very nice

@greatscottlab

3 жыл бұрын

Awesome :-)

Nice work, Scott, i think that the problem is not the orientation of the magnets, or even the magnets, you can use just two of them (pretty big, obviously). Remember that the separation of the poles (on the stator) is made for generate a rotating magnetic field , the rotor will just act as a big magnet, if you want to generate power, with an inducton motor, i suggest, changing your rotor for an alternators car rotor.

Keep it up you are going to get it soon.

He is very good with the shafts of the motor. Turning it well. Definitely g

Value video for me, at least it show the result, thanks a lot

Gears... Hmmm... Btw, great video as usual!

Dude, you're turning an induction generator into synchronous generator, great job 👍 How about making the shaft of the induction motor spins faster than its rated rpm, and connects its terminal in parallel with a capacitor in order to produce the voltage that you want. That would be great if you make a video this way. You're amazing 👍

I am not even an engineer or science student to understand but i still love watching because idk i guess i love the videos 😅😂😂

Great scott you can get the job done by capacitor in parallel with the coils it turns out the value of the capacitor is related to the resonant frequency

With a start capacitor, it works quite efficiently above synchronous speed (you don't even need an external power supply on some motors)

awesome vid

Great Idea!

the content of your videos SOOO GOOOOOOD your thicc denglish accent SOOOOO BAAAAAD i will now watch your videos muted and with subtitles on. thank you very much for the effort to put subtitles in! keep uploading, you have great videos!!

Loved it 😊

@greatscottlab

3 жыл бұрын

Thanks :-)

*You should increase the permanent magnet strength to get more voltage. Simply use more magnets or some stronger magnets*

Great video! I've always wanted to make a bicycle generator but using a car alternator to charge a car battery. I bet you could make a great system with that.

@MCsCreations

3 жыл бұрын

Up for this comment! 🖖😊

@erygion

3 жыл бұрын

@@MCsCreations Hey you found it :) thank you!

We used to have bike generators back in the 80's. It was a small device that picked up on the side of the rear wheel and made enough power to light the front and rear lights. Not very bright though from what i remember.

Great scott !!

I'm too working on convertion of an induction motor as a generator , but my application is as an flywhee energy storage system . We use the induction machine as a motor first to convert electrical energy to mechanical and then store it as moment of inertia. Then when we require it we use the induction motor as a generator this is usually achived by placing capacitor bank across the motor terminals to feed reactive power as someone mentioned . This will work with no major constructional modification to the machine.

@karthikeyajavangula8423

3 жыл бұрын

I agree flywheels are cool. But can I know why you want to use it as an energy storage device?

@SaiPrasannak

3 жыл бұрын

@@karthikeyajavangula8423 I'm currently working a project where we compansate the low voltage ride through in winds mills by pumping the stored energy to the grid . When there is excess wind production the excess is stored in the flywheel and when there is a deficit it's discharged. Conventional storage devices are not that robust and are expensive as a wind mill may face lots of variation in a day.

@karthikeyajavangula8423

3 жыл бұрын

@@SaiPrasannak So, basically that's like the mechanical version of a capacitor. By the way, Nice work bro. 😉

"Creating electrical power on your own is a pretty marvelous feeling" - Emperor Palpatine

Hi there pal just watched your video on making the hand crank generator, which what I watched was absolutely amazing, from start to finish you should have your own business pal, thanks

nice video !

For a much better operations: a) the number of pole pairs of the stator should match the number of pole pairs of the rotor b) the magnets need to be stuck to iron on the inside of the rotor, so that the magnetic circuit has much less reluctance, meaning more magnetic field c) the air gap should be reduced as much as possible I think a and b together will already make the generator much more powerful.

I build a bicycle generator once. I used the alternator from a car engine. The key was to rip out the alternator's built-in voltage regulator circuit and build my own one. Aside from being a bit more energy-efficient, it also let me adjust the output voltage and increased the rotational speed range over which the alternator was able to operate. Car alternators typically are 'backwards' generators. The field coil is on the rotor, and the power is generated on the stator. The voltage regulator monitors the output voltage and, through a simple feedback mechanism, adjusts the field coil current and thus the magnetic field strength to maintain the target output voltage as the load and rotational speed vary. My peak generating capacity was fifty watts, but I was only able to sustain that for a brief time. The limitation was biological: I'm just not in very good shape and can't maintain such energetic peddling.

I like the video because it is helpful and knowledgeable. What I can suggest is that you can use DC motor which is quite efficient and reliable. Tnx😄

You need a permanent magnet alternator or generator for that project. Bicycle lighting sets have used those for about a century, usually driving them from a roller against the bicycle tire. The rotor might work better with magnets mounted in a helical configuration.

Hope the next video comes earlier I can't wait long

@greatscottlab

3 жыл бұрын

Next Sunday :-) Or become a Patreon supporter and watch it now ;-)

There are cheap motorized bike kits that include a motorcycle chain compatible gearwheel with mounting hardware to secure it to the disc brake side of the wheel . I believe you can find that gearwheel outside of the motorbike kit

you can magnetize the rotor the start by using small amount of DC current through any of the winding for generating a voltage also for utilizing the output you have to place a three phase capacitor bank setup for stabilizing the output voltage, since voltages in induction motor as generator setups tend to collapse when subjected to change in loads. And if you have a constant value capacitor set the IMAG setup can only be used for a constant power output setup..

Recommendation .U can use24 v dc RO pump usually used in water purifiers these are usually consumes 1.5 amps at 24v dc and can act as a better generator..

Even tho it did not work well. Still liked this video. As you learn more from fails. If we watch it, then hopefully. We wont make the same mistakes.

Check out the motor/generator in hybrid vehicle, especially the regenerative braking procedure.

On drill batteries: nice thing about them is you can easily build an adapter that they plug into that gives you USB power or AC out or whatever