Asynchronous motor as a generator?

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Some experimentation - testing if an asynchronous motor could be used as an offline generator. Trying various resonant capacitors for self-excitation and priming the rotor.
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29 янв 2024

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Комментарии : 159

@chaitanyabhave5255 4 месяца назад

I like the creator who don't clame free energy

@mmmm768 5 дней назад

*claim 🤓☝️

@davida1hiwaaynet 4 месяца назад

This is very interesting. I did a similar experiment, using a larger set of motors. If I remember, about 1/4 HP motors. The capacitor value was very specific, and the motor speed was also very specific. If the speed was too slow, it would never self-excite. If it was high enough, it would self-excite. I could get more than rated voltage from the motor, but the voltage was load dependent. It would provide more than 200W from the asynchronous generator from a 1/4 HP motor. I need to do a video about this. I still have the motors used for this test.

@michaelcalvin42 4 месяца назад

We often learn more from our failures than our successes. Thanks for uploading this experiment!

@Georgy-fg3bg 4 месяца назад

In order for an asynchronous generator to produce power, it must rotate at supersynchronous speed, increased by the amount of slip. Example: no-load engine speed 1440 RPM --> required speed for generator operation 1560 RPM.

@d46512 4 месяца назад

Easily done by changing a pulley

@liam3284 4 месяца назад

without mains, it doesn't have any synchronisity, other than some resonance from the cap

@Georgy-fg3bg 4 месяца назад

It is known that asynchronous generators can be operated in island mode. However, their operation is problematic. Frequency and slip depend on the size of the load. An inductive load will often cause de-excitation. The right size of capacity is important. Small single-phase asynchronous motors are unsuitable for this purpose. The reason is their poor efficiency and high winding resistance. Motors with a shielded pole are completely unusable. A sufficient amount of remanent magnetism is essential for the start-up of an asynchronous generator. This can be increased by short running no loaded motor or by connecting it to a DC source.@@liam3284

@Georgy-fg3bg 4 месяца назад

It is known that asynchronous generators can be operated in island mode. However, their operation is problematic.The frequency respectively slip depends on the load. An inductive load will often cause de-excitation. The right size of capacity is important. Small single-phase asynchronous motors are unsuitable for this purpose. The reason is their poor efficiency and high winding resistance. Motors with a shielded pole are completely unusable. A sufficient amount of remanent magnetism is essential for the start-up of an asynchronous generator. This can be restored or increased by normal running the motor or by short connecting it to a DC source. @@liam3284

@wireless80211x 2 дня назад

Thermal dynamics 101. Asynchronous motors as a generators do work until a load is placed with these in box thinking designs, Fun to watch and just browsing channels for my time machine parts.

@magyarizoltan3652 5 месяцев назад

I have accidentally seen this work. I was running a load with multiple asynchronous motors because I didn't have one powerful enough. I had them power factor compensated, they were compensated to a PF of 1. I was running them of of two different phases for load distribution. I used two single-phase plugs (this was stupid, and made this effect show up). I disconnected one of them, and the plug gave me a shock, then measured the voltage, and it was around 270V. I started experimenting, this generated voltage would only show up when disconnecting one of the motors, so both motors needed to be powered from mains first. I don't think the fact that I used different phases made a difference, but I didn't test that.

@mernokallat645 4 месяца назад

Működik, de ha egyszer zárlat lesz a kimeneten, újra gerjeszteni kell, hogy újra generátorként működhessen.

@Z-Ack 4 месяца назад

Why do so many people reply to comments in a totally different language? Like if they understood the comment in the first place than they know english but just choose to be difficult and write in their own language expecting to be understood.. making them just a prick. Or they are just ignorantly replying to any comment for some reason.. beyond me..

@Z-Ack 4 месяца назад

@SinsBird 4 месяца назад

Plot twist: you're the ignorant one here. @@Z-Ack

@marka1986 4 месяца назад

Not sure if it's on all devices, but on my galaxy tablet the option to translate to English is available.

@kd5byb 5 месяцев назад

Love your cat's comments. She's awesome. :)

@jms019 4 месяца назад

Cat's obviously in charge of this channel.

@kd5byb 4 месяца назад

@@jms019 The cat is always in charge. Even when he or she isn't. ;)

@atmel9077 4 месяца назад

As someone pointed out in the comments, the motor can become a generator if it is first powered, then disconnected from the power supply. Another option may be to energize the windings with a battery while the motor is running so that it can be magnetized stronger than the residual magnetism.

@ratbag359 4 месяца назад

Yea hopefully he revisits this and uses a switch to cange from source to load.

@user-xe8oi5oq6c 4 месяца назад

Thanks for video. One can use induction motor only providing it reactive power for rotor magnetization. One can easily do this for 3phase motors. 1phase motors either have each pole divided into two, half of which encircled by shorted winding or have two windings, one of which connected through cap to mains. Your motors look like 1phase ones. I think that motor w shorted windings is impossible to start as generator using capacitors due to huge losses in shorted windings. Two windings capacitor motor - maybe, but idk how. Actually both types of motors have so

@piconano 5 месяцев назад

You need field excitation for it to work. If you want a reasonable constant output voltage, use an AVR (Automatic voltage regulator) found in most gas electric generators, to power the coil. Just like the alternator in the car. Magnets are expensive and lose their mojo under heat with time, electromagnets don't.

@user-tz3fd8hm4q 4 месяца назад

Thanks for the video and your good work!

@BRUXXUS 5 месяцев назад

I love this quick little tests of ideas! I'd be happy to see more of these shorter videos where you do tests and experiments like these. If you enjoy making them, anyways! :)

@tabeschektabeschek1852 4 месяца назад

Thank you for the interesting Video!

@JohnnyX50 4 месяца назад

Really interesting test, just had to be tried :) only you could make it interesting, your a genius 😃

@CanizaM 4 месяца назад

There's a video on here called Antique Allis-Chalmers 10HP Electric Motor that shows a HUGE 3-phase motor with enough inertia that it works as an asynchronous generator when coasting to a stop.

@VladoT 4 месяца назад

In order for this to work I think the motor needs to rotate a bit faster

@andiback 4 месяца назад

Yes may be you are right, but it cannot, it is locked in this case by the frequency of the mains voltage, in Europe it is 50 Hz.

@liam3284 4 месяца назад

Could be right, at that size, not enough power to maintain a magnetic field.

@andutei 2 месяца назад

Try connecting the generator to mains while it's being turned by the motor, but with a capacitor in parallel (besides the normal auxiliary capacitor). Then remove the mains connection and measure the voltage. Without the capacitor the voltage will ramp down in a few tenths of a second as the flux in the rotor dissipates. Maybe it will work, worth a try. You can find videos of larger 3 phase asynchronous motors used as self excited offline generators. Maybe this motor has too big of a stator resistance to self excite from start.

@BeesKneesBenjamin 4 месяца назад

You gotta be kidding me hahaha, I was looking at someone actually demonstrating this two weeks ago or so. Very little info and sources available for a practical implementation... You did it :-)

@christatler7378 4 месяца назад

Try using a dc excitation voltage on one of the windings. Sometimes even a 9 volt battery can work.

@jafinch78 4 месяца назад

Oh, you have to show the output waveform. Seems like from what I recall, these really need to be rectified to DC and then inverted to get good stable AC output. Seems loads like a resistance load at first up to like 30-50% continuous output causes bad voltage spikes, though after that the output stabilizes. That's my experience at least with the one asynchronous 2 stroke engine generator I own. I think really is not so great, though the more modern inverter generators using 4 stroke engines seems nice if the super expensive or unobtanium inverter is available cost effectively. Check like the range of resistance loading on. Also, show us using at least a cheap oscilloscope if you can. That would be super awesome! Same goes with an inverter for these motors.

@ruben_balea 4 месяца назад

Try using a 9v battery in parallel with the capacitor or with the output to "flash" it while it's running, sometimes that works, although it may be turning too slow... if you have a drill fast enough you can use it to drive the motor. Years ago I used the motor from an air conditioner external unit fan to power LED bulbs using a cordless drill so it's possible.

@fakduken9775 4 месяца назад

Connect them both to mains and then disconnect one of them to measure the voltage it produces.

@sklepa 4 месяца назад

I also bought those clamps from lidl recently :D

@jutukka 4 месяца назад

I first thought that you had managed to build a perpetual motion machine. 😅

@mattsan70 4 месяца назад

you need a 3 phase motor and put the capacitor on the other phase

@Geniusinventor 4 месяца назад

You should try other Motors like DC or AC, just for testing if that can turn on that Bulb it's a fun experiment.

@jp040759 4 месяца назад

Cool to see someone show it doesn't work.

4 месяца назад

Niceee! Thanks.

@Cassandra_Johnson 4 месяца назад

Actually, kittie, that was very interesting!

@tout7842 4 месяца назад

If you want to use it correctly as a generator and have a real output voltage you have to magnetize it at the start, meaning you use it as a charge at start then disconnect it from the grid then you connect quickly the load on it to keep the magnetic field in the rotor, then the fact that there is a charge will automatically draw current, and here, what you have is : a current created at the stator by the initial magnetic field of the rotor, that current will create a magnetic field opposed to the one that created itself, whitch ensure a big magnetic in the rotor and so the generation of power, basically in eoliens they use a bank of capacitors to create briefly the first magnetic field at the rotor then it sustain itself as i said up

@carlosaugustorj 5 месяцев назад

Yep! we learn from our experiments - and of course with the other's idea - I do have a 'question' - the speed of the rotor was increased, maybe it would generate 'more power' ? - I mean in theory it is running at it's 'designed' speed, what if the rotor ran faster

@1pcfred 4 месяца назад

Maybe it needs moar salt?

@experimente9912 4 месяца назад

What about giving the machine a DC current pulse while it is getting rotated and a load is connected to it? That could maybe get it to work.

@blg53 4 месяца назад

You can make it turn faster by making the driving pulley diameter larger than the driven one.

@ssupertutorial 4 месяца назад

Super interesting experiment, I've always asked how they could use an asynchronous motor in old Tesla

@liam3284 3 месяца назад

Easy, its a 3-phase machine with a 4-quadrant inverter, same as many metro railcars use. Cheap and cheerful way to get a wide operating band.

@NEW_INSITE 4 месяца назад

Perhaps try rubbing the second motor with the cat's fur, maybe the static electricity will increase the voltage output. Lol. All in good fun.

@filipgugo5296 4 месяца назад

In order for iz to work as a genarstor you need to connect a load to generator and then plug it in the mains to make current flow trough motor thus exciting it. Once you disconect it from mains, current will keep flowing trough load

@Elekron5556 4 месяца назад

Lze udělat z asynchronního motoru generátor, jen je potřeba nadsynchronní otáčky.

@scienceguide3880 4 месяца назад

bigger motor seem work like 380v motor because need a bigger rotor for resonance and magnetic left on rotor still have enough for excitation resonance. small motor still weak at the rotor

@tiagoferreira086 4 месяца назад

You missed the opportunity to hide some wires and say that was free energy lol 😂

@elektroarkivet 4 месяца назад

What if you use a cheape and simple 230V/50Hz inverter to excite the "generator"? If it's driven at the synchronous speed I guess nothing will happen, but if slightly overdriven would it increase the voltage from the inverter while keeping the frequency, or will they fall out of synchronisation and the inverter goes boom?

@Alexander470815 4 месяца назад

This should work as a generator. I found that with a somewhat higher speed it can easily get exited enough.

@d46512 4 месяца назад

What if you put a larger pulley on the driving side? Then the generator can run quicker than 50 Hz.

@computerkiller1494 4 месяца назад

i think something like this would work if you powered the two motors and then overdriven the "generating" motor with maybe a diesel engine or something like this

@JeffHessenberger Месяц назад

I think you need to run the generator a little faster than its synchronous speed, to create a slip, but in the opposite direction. Just change the pulley ratio slightly. you may have to play with the capace again as well. Worth a try?

@cmizapper 4 месяца назад

This works with stepper motors too!

@niemam5825 4 месяца назад

But stepper motor got permanent magnet

@aleksandar4923 4 месяца назад

it can work for sure just rotor needs to be excited properly

@worroSfOretsevraH 4 месяца назад

Maybe you should make a video on those US-52 AC Motor Speed Controllers? They are ment for washing machine motors with tachogenerators. Common type. Should be very interesting.

@smeezekitty 4 месяца назад

Diode always has the sketchyist mains wiring

@timofeizakharov9053 4 месяца назад

Three-phase async motors can generate energy with added capacitors.

@MahBor 4 месяца назад

Can't wait for all the comments asking to power the motor with the generator and make free energy

@aleksandarvasilevski7410 4 месяца назад

I like the set up. Power supply sandwiched between two motors and neither supply supplies niether motor is motoring. My profesor said that each motor can be generator and vice versa. I found book from russian author Piotrowski where everuthing is explained well. Async motor consumes bit reactive energy but returns to network active energy. Not sure if one can try like this without source of reactive energy.

@MyProjectBoxChannel 4 месяца назад

Mabe it will work better with a 3-phase motor and a capacitors. I have seen people putting a couple of small magnets into the rotor, to help with the initial excitation. Maybe injecting some voltage whilst the motor is spinning. I guess the squirrel cadge "windings" need to be loaded to maintain a magnetic field.

@liam3284 3 месяца назад

3 phase is fine, but these 2 phase, the windings are 90° apart. Where do you get reactive power from?

@MyProjectBoxChannel 3 месяца назад

@@liam3284 I guess you still need to add capacitors for reactive loading? Maybe inject some initial excitation voltage. But a small neodymium magnet embedded into the squirrel cage rotor, will induce a some initial voltage into the coils.

@dimitarnikolov3527 4 месяца назад

It would be interesting to see what happens when supply a small DC voltage/current through 1 of the windings. Of course it would make the rotor harder to turn but would it be able to induce a current through the other winding?

@LaserFur 4 месяца назад

nope. it would just saturate armature. you need to send pulses into it to get more power back out. This can be done with a electronic circuit.

@niemam5825 4 месяца назад

Maybe try to excite it with multistep voltage multiplier

@godfreypoon5148 4 месяца назад

What you need to do is get some flux into the rotor. Just heat it up with a flame and drip it in through the air vents.

@videolabguy 4 месяца назад

How about adding a small DC bias current to the coils and AC coupling the power out of the motor?

@DiodeGoneWild 4 месяца назад

I think a DC current would just have a braking effect.

@otaznikvykricnik5961 4 месяца назад

5:04 My suggestion for a new video: It woul be nice to see two motors working as DC to AC inverter.

@techbarron7383 4 месяца назад

please next make metal detector using atmega chip with display,that can detect range 1 meter or more

@LawpickingLocksmith 4 месяца назад

With thousands of ceiling fans being thrashed every day, many experimenters have tried to turn some into wind generators. At one time in Australia you could buy a ceiling fan for the same price as 4 cans of beer. There had been a few successful conversions but not much to call home about. Good trial, I think your cat could have told you that at the beginning.

@Comrade_YG 4 месяца назад

Your user name sounds like lock picking lawyers username

@DiodeGoneWild 4 месяца назад

I think I've never seen a ceiling fan here. There must be a lot of cultural differences :).

@michaelfisher9671 4 месяца назад

Ha I once spent a day fixing a ceiling fan and was quite depressed when I found out how much a new one cost.

@LawpickingLocksmith 4 месяца назад

@@michaelfisher9671 They had a steep price rise. I got to furnish a house with 5 new ones!

@j7ndominica051 4 месяца назад

What is the difference between an "online" generator and a simple generator?

@DiodeGoneWild 4 месяца назад

an online generator supplies power to mains, while an offline generator just powers a load.

@raconixx3573 4 месяца назад

I'm not 100% sure but: usually the motors rpm is a little bit less than mains (slip) -> they need the difference to induce the current inside the rotor. So for being used as an generator u have to exceed the mains frequency. Without an external Island-Grid (connected to the generators output) the rpm of the motor will always be the same than its output voltages frequency. So there is no induction possible because the change of magnetic flux will get to 0. Just my thoughts to it, pls tell me when im wrong. Might not be explained very good xD

@maneelectrotech2274 4 месяца назад

Yes it is generate full voltage, frist you charge capacitor from mains and then this charged capacitor connect to this motor at running condition. Then this motor producing full voltage. Try this

@zgbapl 4 месяца назад

The first setup could be a nice 1,024V reference voltage for a DAC. Solid state is overrated:)

@volleswerkfullorganpower249 4 месяца назад

Put voltage to this capacitor befor conecting to motor. You have rally generator then !

@liam3284 3 месяца назад

I tried to use paper to figure out how to make this work. A parallel tank circuit resonating a few hz below rotational speed. Start it resonating with some DC, and close it in on the motor. Voltage control looks terrible.

@Alexelectricalengineering 5 месяцев назад

Try to apply a excitation voltage when it's running, I was here that can work, I didn't try. 👍👍👍

@acoustic61 4 месяца назад

Maybe you can test one of those perpetual motion generators? 😂

@other_things 4 месяца назад

its impossible because first motor slips -1,5% and as a generator speed needs to be +1,5% more. if you connect a vfd (not big like one of your videos :) and icrease it to 53 hz the second will get 51,5 hz and generate.

@Z-Ack 4 месяца назад

Needed a big gear reduction/ planetary..

@jmans4928 4 месяца назад

Something happened to the first outlet of the extension at the north west corner. : )

@ve2zzz 4 месяца назад

What is the name of the power plant ???

@KeritechElectronics 4 месяца назад

Unsuccessful experiments is where most science happens. Testing where hypotheses fail, and what to correct. I wonder if you have an old school slip ring 3-phase induction motor. That probably could be used as an alternator if you rewire the rotor for DC.

@godfreypoon5148 4 месяца назад

It looks like you are not able to excite the motor. Try telling it that you heard the ice cream truck on the street nearby.

@sebastian19745 4 месяца назад

I wonder, if you give to one coil some AC, let´s say 12V, without spinning it should work like an 1:1 transformer, right? And if you manage to spin it faster than the slip, to be sychronous with the mains frequency what you will have at output? And if it spin with some multiple of half the speed without slip (like 1.5 speed?). I mean, if to be in sync with the mains frequency it should run at 1440rpm, try running it at 720, 1440, 2160 rpm while powering it with 12V/50Hz. Also, the output voltage is a pure sine wave, I imagine, right?

@DiodeGoneWild 4 месяца назад

Yes, the output is a pure sine wave. The motow can't work as a 1:1 transformer, the windings are overlapped in a way that the magnetic flux cancels out. It's the same case as putting 2 coils at a 90 degree angle.

@G1ZQCArtwork 4 месяца назад

Stating the obvious here, but the output needs a magnetic field around the coils.

@ruben_balea 4 месяца назад

I bet most of them were/are offline generators, I don't know today but until the 80s most "light towers" used on construction sites had asynchronous generators because those were cheaper and maintenance free. Those were also fine to power things like small concrete mixers, angle grinders and drills that didn't care a lot for the voltage stability. Also the "2 stroke 950w generator" sold today under like *six million brands* 😅is asynchronous too. I think those are clones of the Yamaha ET950. Some have aluminium windings and are rated only for 600W but the shape is more or less the same. Some have also a 12V (unregulated) output to recharge lead acid batteries.

@liam3284 3 месяца назад

I think you will find those 2-stroke machines are synchronous, using "brushless excitation" and one capacitor for voltage regulation.

@ruben_balea 3 месяца назад

@@liam3284 Maybe, but the capacitor does the same job as on asynchronous generators, it doesn't regulate anything, that's BS they put on schematics to not have to explain technicians why a capacitor is needed there, the capacitor supplies reactive power for the electromagnetic field that powers the rotor by induction. The bigger the capacitor the higher the output voltage and the more inductive the load is the lower the output voltage will be. To regulate the voltage the only remaining option is to modify the engine speed but that will change the output frequency. If the load is capacitive the output voltage will rise and can damage both the load and the generator itself. That applies to brushed synchronous generators without AVR too, if you put capacitors in parallel with the windings the output voltage will rise. Depending of the design of the AVR system the voltage can skyrocket even with an AVR system present, for that reason some generators can't be used to power buildings with many gas discharge lamps of any kind that use electromagnetic ballasts with PF correction capacitors integrated in the same fixture, because the discharge lamps won't create any inductive load until they start so you can be connecting a massive amount of capacitors to the generator when you turn the lights on, especially if the lights in the entire building are powered on at the same time, as would be the case if the power goes out while the lights are already on and a switch is used to switch the whole building from the grid to the generator.

@tkordus 4 месяца назад

Try mount magnet on rotor :)

@felixcat4346 4 месяца назад

Maybe you could how the regen feature works on Tesla cars.

@thisisyourcaptainspeaking2259 4 месяца назад

I thought at first, this was going to show perpetual motion. ;)

@user-wv8uk5fd9t 4 месяца назад

Imagine getting a heart from DiodeGoneWild

@AKG58Z 4 месяца назад

You guys don't hold those banana plugs like that because I have done that and that give me a shock even if you are not grounded due to some of those plugs being exposed a bit

@Shmbler 4 месяца назад

Now I wonder if I can build a house using ATX power supplies instead of bricks.

@liam3284 3 месяца назад

it will be a power house

@ridenmanadam9363 4 месяца назад

potrebuješ 3f motor minimalne 1.5kw a mat ho v nadsinchronnich otačkach aby začal generovat v ostrovnom režime , a medzi každou fazou a nulakom musi byt rovnaka kapacita (6uf+)

@d-riuz7402 4 месяца назад

Jj 🙁

@techtinkerin 4 месяца назад

Put a bunch of magnets around the motor. Dunno the science but hey its worth a try😂👍😁😎

@1pcfred 4 месяца назад

Cory's Lab did something with magnets on a spinning wheel. Was pretty destructive as I can recall.

@user-hj6df3jf4w 4 месяца назад

What would a 'soft-starter' do with this? Would it make a difference?

@emanuelgoncalvessantos4499 4 месяца назад

Bigger pulley on the motor, please.

@adrian_sp6def 4 месяца назад

You need not only resonance of coil and capacitor circuit, but also a right rotation frequency for resonance in core, in this way You get an switched reluctance generator. watch?v=NLiZDQxywqE and all parts (It is about stupid "free energy" staff but one conclusion from that videos is to see a switched reluctance generator in action)

@Norfieldeng 4 месяца назад

Viewers might be interested in this video which shows an 8 pole motor being used as a generator to produce DC via a bridge rectifier. I was surprised that they manage to get it to self excite but is seemed to work very well. ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-WPICp3c_qIQ.html It was put in after a chinese generator faile to deliver the reated output without overheating. So why is it not working in this case?

@change_your_oil_regularly4287 4 месяца назад

@evpover1897 4 месяца назад

Wow onli 1 wolt

@loslos2937 4 месяца назад

The motor winding has to be powered first so that it can act as a generator. If not, it doesn't work, but good try.

@ThermalWorld_ 4 месяца назад

You need to have a magnetized core to produce energy so no magnetized core no energy, no matter how fast you turn it..

@Rashad-az 4 месяца назад

Even more capacitor 😂

@burtgummer9057 4 месяца назад

"more salt!!! There's water everywhere!!! The floors vibrating now!!! It's using 10kw!!! EVEN MORE SALT!!!

@scratchdog2216 4 месяца назад

Motor hooked to generator surrounded by energy saver capacitors. lol Could be on the brink of something big here. Neat idea.

@Tag-Traeumer 4 месяца назад

9.891 views. OK. Now try the title FREE ENERGY GENERATOR WORKS !!!

@JoseSilveira-newhandleforYT 4 месяца назад

A stepper motor works much better as generator.

@1pcfred 4 месяца назад

Wiring up two stepper motors to each other is a neat trick. If you have two of the same stepper motor you just wire them together color to color then turn one by hand and the other will follow it. Stepper motors work good as generators because they have permanent magnets in them to generate the field. But the drive one stepper motor with another is pretty gee whiz. It definitely entertains for at least as long as it takes to do.

@JoseSilveira-newhandleforYT 4 месяца назад

@@1pcfred Yep, it works 🙂