12v 90 Amps Car Alternator to Self Excited Generator using DIODE
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- เผยแพร่เมื่อ 4 ก.พ. 2025
- In this video , i will teach you how to use a simple diode for the self excitation of a 12v 90 ampere Car Alternator and thus using it as a Generator. The brand is Valeo.
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You seem like a very Honest and honorable human being giving the people truthful insights on technology
I try to be 😊
Youre video is actually legit. i like it. you're not just hiding a battery somewhere tricking people
Guys a bloody genius. I’ve been trying to use an alternator for windmill charging. This is one step closer. Luca
It would work for a windmill. This doesnt do anything but slow to a stop as the battery dies, and the more stuff you try to power within this circuit, the faster the fully charged battery will die.
Im so impressed about the way that u teach on how to use alternator as an alternatives free energy. I love the way u talk fluently in english, some indian guy who make some tutorials on youtube is using the local dialects which in turn viewers may find difficult to understand...
😊
Sir if we remove carbon brush , can alternator provides electricity
@@MrElectron why do you mislead these poor, uneducated people. The alternator IS NOT GENERATING ANYTHING! AND YOU KNOW IT! THIS IS POWERING AN ALTERNATOR AS A MOTOR USING A BATTERY!
You know it'll eventually stop running. You know that connecting anything else to the circuit will make the battery just die faster DISPITE the alternator.
Đe
Hi enjoyed watching your videos. It gave me the knowledge to build a backup up off grid 12v charging device. Used a second hand 100 amp alternator, cycle turbo trainer, old jump lead switches etc. Basically I can pedal in high gear with little stress on Crank & alternator rotation. Pushing rear wheel by hand has alternator pulley & rear wheel rotating freely. Obviously when exciting you can feel load slightly but you can cycle immediately in high gear. Tyre, inner tube & turbo trainer tiny freewheel resistance roller removed. Belt goes round backwheel & alternator. Turbo trainer folds in half with alternator attached. Bicycle comes off turbo trainer & can be used as normal by just adding tyre & Innertube.
Bike kept in campervan with turbo trainer & can be used to jump-start van or charge leisure batteries. Beats charging with a slow battery trickle charger. Basically fully off grid backup.
Very Good Explanation......it is nt fake....absolutely Congrats the valuable informations....
Very nice video
On the Bosch alternator you don't have to do anything to have it self energizing, just the remanent magnetism is enough to start charging as long it spins at about 3000 RPM.
your use of a small battery is a good idea but this can't be left alone because of the decay of the battery, better to use a centrifugial switch and the battery bank to excite the alternator if you intent to use it in a windmill setup.
good video.
Gained a Canadian Subscriber from this video! Very amazing, you are a genius and your English is very easy to understand! Thanks for your time!
The most abused TH-cam practice is not bogus videos purporting to show the viewer something never before seen while actually doing something quite ordinary just outside of camera view. The Most abused TH-cam practice is the video "Titling". The practice is pervasive because everyone is vying for viewers and subscribers. So this method is used to suck viewers in to this highly competitive forum. Mr.Electron, You have enough grasp of electronics to make it your career so please don't fall into that "MISNOMER" trap. Please think honestly about your video title. I don't make hit and run statements. So I'm willing to debate this. Besides my objection to your title I found your video entertaining with no obvious errors or claims. I did, in fact click "Liked" and will probably follow your work!
Wakodahatchee Chris
ALTERNATOR: "So, guys I'm so exited... I'm about to lose control and I think I like it!" XP
Ein selbsterregten Generator wie eine Lichtmaschine in einen selbsterregten Generator umwandeln, Respekt...😄😄😄😄😄😄😄😄😄😄😄😄😄😄😄😄😄😄😄😄
Well explained bro...thanks for the video
I cut a 1/2 inch socket extension and machined it down so it fitted into a drill. Then you can put any socket onto the drill to turn the alternator. I also used an old lawnmower engine to test alternators. I`ve made my own pushbike generator too lol. I was lucky enough to work at Valeo repairing alternators and starter motors so I could get all the spares I wanted.
ha ha weird comment. "I could get all the spares I wanted" ,means you could burn them and replace them for free? LoL
I did this(similar) on a 1000cc BMW motorbike alternator to get max output to charge the battery quickly when used in very cold weather for starting so did not have to use kick starter! about 40 years ago....used the bike battery via a resistor from the ignition circuit so not connected when the Engine off to limit the current through brushes to 4 amps at 12 volts to get the max output without damaging rotor winding (35w headlight bulb dip filament can be used as a resistor (3x12 volt 36 watts, check current through winding when connected to the 12-volt battery to find max current for alternator exciter winding). if the battery was very low still would be enough current to excite the alternator.
"Self excited"? Proceeds to hook up battery.
LMFAO thank god someone finally said it. These are the most nonsensical videos
🤣🤣🤣🤣🤣
I get self excited in the shower 🚿 🤪
At 6.50 he uses a bike and produces power without a battery.
@@Finn-Germe81 you naughty 😂 me too 😏
The problem here is that unlike generators, alternators don't retain residual magnetism. Although small magnets can be incorporated into the rotor to begin the process of producing current, they must be small enough not to allow the unit to run wild. Simple adjustable current limiters can then be used to regulate total output while more advanced regulators can provide rotor current in regard to rotor speed.
You are doing nice work.👌👌
Very good video, I like it. What if we connect a fly wheel on alternator so that output can last longer. This experiment is worth giving a try and make a good descriptive video on it. Thank you 🤗
did you build it ?
@@jeffokriya3389 No, I want you to have a look at this article for a clear idea about car alternator and may be you can get a better idea for new video.
The principle is sound. However there will be current drawn from the battery all the time the alternator is not spinning, so that battery will get discharged very quickly if left connected when not in use. You need a method so that the battery is connected only when the alternator is spinning. Also with the charge circuit you intend to provide, you must be careful to follow the recommended charge method for lithium batteries. Incorrect charging will result in the battery being destroyed and possibly even catching fire. The magnets are of course only used as a means to connect wires to the battery. A battery holder would be a far better way to do this. Or hold the 2 wires in place using an elastic band around the + and - terminals instead of magnets.
He should use a mosfit for the battery. The gate would act as a switch when the alt produces power.
@@johnd5542 I was gonna say the same thing. P-type gate baby
Most people here probably don´t understand what you mean by "self excited", erroneously, they think it´s "free Energy". No people, it simply means the rotor´s feed is provided by the Alternator, but this happens in most cars. There is a way to generate free electricity from an Alternator, but this is not it. It consists of defeating the Lenz effect. Which is an obscure secret.
When he used the toe nail clippers I subscribed.... lol!
All this intelligent talking & u don't have a pair of wire snips!?
Ikr who cares if u can get some free energy 👍👌🏼🙌🏾✌️
I'd say wire up an inverter & get A.C from D.C.
Figure how to power up the alternator without the grid or minimal grid usage!?
Kinda like the newer diesel trains!?
Diesel fuel/motor Powers up electrical in those trains now!!
If we could use minimal electricity to power up inverter power!! We could be on to something!👌🏼🙌🏾
We have step down transformers & step up transformers!
There's gotta be away to achieve better results!?
We have solar power....wind & water to power generators/alternators!?
Jus need enough to power larger AC equipment too!
The mini ductless hvacs need to research more! Suspect some have a low locked rotor amperage & full load running capacity!
We can "I believe!" do this!👍🤜🏼🤛🏽👌🏼🙌🏾✌️
Thank you. Very helpful for my basic understanding. I am not an engineer but now love a lot of things wrt engineering.
Good job BROO CAN I USE, USED ALTONATOR TO CONNECT LIKE THIS AND TO WORK????????
It is a nice job bet please I want to ask a question what do we do to DC motor to stop it from drilling battery
The brushes are independent and insulated from the body so you have to connect both sides of brush
Very good sir, thankyou for showing this video
Very well instructed
thanks for elegance videos
can I have your idea that what is the best solution to use all petrol engine HP for an electrical generator?
attaches multi alternator through belt would work?
or should design dedication gear reduction and generator like a commercial portable generator?
Yeah ! Its gonna work great
@@MrElectron It's either or dude!
Hi, it was really impressive.
How can we charge a 24 volt 300 AHC bank through an alternator. Wish to use a power steering motor to rotate the alternator.
No idea why all the dislikes. Excellent info. Thanks.
It did work because when there is no electrons in other end; it is not magnet to suck electrons from atmosphere, so it is just metal.
Got an easier way to excite your alternator, you don't need the battery.
Disassemble the alternator.
Stick one of the magnets to the inside of your rotor. On the rotor, you have the triangle teeth like shapes that surround the coil. Drill a hole just large enough to put the magnet in one of the triangles. You have to work out which way the magnet goes in - North facing up/out or South facing up/out.
Reassemble the alternator.
Reconnect your wire and resistor and try again from 4:00 in your video.
Their you have it, a self exciting alternator with no 3.7v battery.
I have made a video doing that in the past
Very good, you are the best man now and forever
Hi, what is the resistance wire thickness, does it matter which gauge is used.
Enjoyed watching the video it was very well done thankyou
Congratulations! You discovered how alternators work. Where is the "self excitation" part?
We can connect a 12V /rechargeable battery for feeding self excitation . Circuit can be simpler, Only re- chagrining of the battery can be designed.
Can we use any alteranatorto make like this
what the (felement wire) you are talking about?
is it a high resistance wire?
and why you have use please?
Very interesting. Plus, it's a holiday here in the US so I can watch videos and learn some stuff about electricity - which I HATE - all day long. I'm working on a little solar setup with my clumsy, mechanically-minded brain and watched some videos last night so am beginning to understand some things and electricity is getting less and less scary. Thanks!!
@Mr Electron Experiment Suggestion: Try shorting(connecting) all 3 active points (not ground) together on the rectifier. And run the alternator normal like it would be in a car, hooked up to a 12v battery. Everything the same as normal but with 3coils shorted/joined together. Then run the alternator and monitor the battery, I think you'll be pleasantly surprised what happens.
no, it´s not pleasant to generate an unregulated voltage, it´s dumb. Not very useful nor safe because you can burn the Alternator or the load.
might be if you trigger it with a short connect to the battery?
that means for somehow a voltage is applied
alternator is self agitated!
cool
I wish you wuld make videos about compound starter/generators how those old delco 4 commitator rotary devices worked .
How to re arange dc motors commitator brushes to have bouth motor and generator ?
Well I am really impressed with your teaching but one thing I get I don't get through my head how is your multimeter running even before you even pull on the string
A simple blade connection or original Exciter connection with lead tails is best to excite with
I had the idea of hooking an alternator up to an exercycle, but it appears you've beaten me to it. :-)
good work ! you have demonstrated a very useful circuit. perhaps solar panel at 12v dc to exite feild ?
What is purpose of cut out attached between alternator n battery in the car?
I have searched for a clear explanation of all this. This is the most clear concise video ever Thank you. two questions, why thw filliment. why not a jumper. why not just connect a little motor to spin it? thanks again.
I think the filament is made of Nichrome resistance wire. It acts as a resistor and limits the full output current from passing through the rotors winding (burning it out)
Nice Video bhai 👍
Very good project 👍
I like your educational videos
Awesome ideas!!
Thank you! 😊
@@MrElectron I am currently working on a reverse ran power wheels toy car generator. The axle hole allows you run a shaft thru multiple parts and you can wire for series or parallel for greater amps or voltage. I use hand Crank but I believe if I configure correctly it will run a separate motor and power itself.
Theory. A 10kw generator with a 1kw motor and gearing would power itself and leave you 9kw usable power. Load would surely effect
Diodes and current regulation are key. I run modified led flashlights on solar with car batteries. Voltage doesn't seem to matter except brightness but if you don't drop current they fry fast
always wondered why they couldn't have something like an alternator built-in kind of like a traction motor in the wheel that way when the car rolls it spins and creates juice to charge the batteries as you're going
Looks like your method can be use in a rural setting, perhaps put some blades to it and use wind to move it. Connect it to a single car battery for 12 volts or 2 batteries for 24 volts. and use it to power a TV or computer IMHO.
Great video.
I suggest you would use a portable hand-drill to achieve the alternator's rpm . You will be surprised.
My alternator come self-excited do I still have to put the battery to it to make it work
I need a trick similar like this to test some old alternators I bought on used parts.
Äääähmn... why all this tinkering? The Electronics inside tha Alternator is doing all of this for you and it regulates the exitement current to the point, whre it puts out 13, 4 Volt (usually 14, 4 Volt) regulated. Unse the control connectors on the alternator for this purpose. In "normal" operation, the Thing gets 12 Volt when you turn the Key to position 2 in the cockpit. ;) I have built a wind turbine, several years ago. To exite the alternater only when the wind is blowing, i mounted a piece of sheet metal to an micro switch. (wind == switch on) (no wind == switch off) That way, the battery bank would not get drained during calm weather. Anyway... i diggress... keep on doing your great work. well done. Greets from Germany.
There is a screw terminal on the regulation disk unused that will make a negative screw terminal with regulation diodes I'm use already
For charging the lithium battery. Simply add in a 5a fuse and a 12v car plug usb charger.
Dear friend,
I am one of your followers, I want to suggest to draw an electric plan for your circuits. I think it’s very helpful. Thanks.
Did I miss something? How can a high speed none modified alternator make 12v at low speeds? Exciting it early does it?
Howmuch torque it tales to ren alernetor to max limit
You should never connect an ammeter directly across the output terminals of the generator as this is not a good test for the amperage of the generator. The ammeter on its own provides a short circuit and so very little voltage is required to get a high current.
The self-excitation could be improved through magnetizing the rotor or adding a permanent magnet into the rotor.
In a self-excited generator, the value of the resistance of the field has to be related to the voltage characteristic of the generator. There is more than simply connecting the output to the field!
Or even better, connect a battery to it, then the regulator will take over after it reaches 13.5V
Excellent I learnt from you how to check the Altertor.
I am very curious if you use higher voltages to excite the roter will the stronger electromagnet field give you a more powerful generator (or motor 😁)
Can alternators be combined to produce power to do some work. OR to do MORE work?
I think this method using electric bike alternator output dc to dc 12v convert to 72v bro work or not
Yes
@@MrElectron Sir.
3.7v cell se dc ko ac me boost krke computer chala skte hai with monitor..agar possible hai to bana oe dikhaao aur kitni der tak chal jaayega..
Most new alternators (except an external regulator alt such as a Chrysler Corp alt as almost all of theirs are external reg. ) are self exciting when the rpm reaches around 2000 rpm or so and will continue to work till the rpm drops below 400. Most gm alts have a S/E reg in them now. Wind generators don’t like too much amperage as it take 5 BP to produce 100 amps. It’s better to stay under the 30 amp range. I use a Nippon Denso 12180SE Lester number which is 25 amps with a S/E reg installed. It’s small and can spin up to 10,000 rpm.
Did you tear down the regulator?
If there isn't the regulator how can it keep the output at 12 volts?
can we operate car alternator on solar pannal for charging 150 ah tubelar battery
Superb. I learned such a lot. Thanks.
Very good video...intillegent
Hello, ça fonctionnerait avec un motor de machine a laver ?
Try using a shorter pull cord to get the alternator up to speed.
We can run a DC dynamo by using 12 v adpter
i'd attach the alternator to a drive belt of a car engine, a lot less work :o)
So the maximum voltage it can produce is around 13.5 volts ? That means only the regular 12-14 volt battery can be used for charging.
why only 3. something volts only is the voltage supply of the artificial magnet should i use 12volts for better performance? if no why ... this part only im confusing
Hey I'm struggling with exciting my new alternator. It is a 3 pin alternator. It is hooked up already in the car but it is not charging at all. Fuses, grounds and wires are checked. But still nothing. Id appreciate your help exciting it.
I am thinking to build mine, and I will convert it to wind turbine, but I am thinking if the 3.7v battery emptied, not enough to excite the rotor so I need to buy new battery again?
आनेवाला व्हिडिओ देखने के लिये मै वेट करुंगा 👍👍👍👍👍
You're the best! Thanks for the amazing videos!
But this is a well known thing by engineers and auto repairmen, the exciting voltage for the rotor comes from the ignition switch, but goes through the regulator built right into the alternator.
3.7 volt 18650 wont magnetize the core of a 12 volt system lol... you repair man? niether am I but I know an electromagnetic core isn't regulated mostly because the line is dirrectly off the FUSE BOX of 99% of the vehicles of there... wow research :-)
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@@natarajnnatarajn9478 N
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what was price of this Automator ? new /old ?? and witch car hae smallest alternator i want to use in my bike
Howdy.
Technically that is not self exciting. It uses a battery to magnetize the rotor. Old car DC dynamos were self exciting.
The trouble is to generate enough voltage to overcome the 6 pulse bridge rectifier forward voltage of 2x0,7V = 1,4 V. If the bridge is 3 pulse the forward voltage to overcome is 0,7 V.
The residual magnetism in the rotor seldom induces enough voltage to overcome.
3 phase induction motors are sometimes used in petrol generators to produce 115 V or 230 V 3 phase AC. The trick is to use capacitors across the poles to generate exactly the same amount of capacitive reactive current as the stator produces inductive reactive current. Usually this setup is self exciting. If not a 1,5V dry cell may be momentarily connected over any poles to start the self exciting. Alternatively a magnet may be placed on the stator for a moment.
I wonder if a magnet on the pulley would be enough for the induction to overcome the rectifier forward voltage ? I might try that. One problem could be over excitation at high revolutions althoug the regulator has cut off the rotor current.
Regards.
Howdy again.
Experimentation showed that outer excitation needs be about 2 V to the rotor. The current needs be about 200 - 300 mA. After that the alternator will self excite up.
Magnets had no effect whatsoever. A small solar panel may be used to deliver constant pre-excitation. Only works in daylight, of course. Another solution may be to let some kind of wind hinge operate a micro switch to excite a relay that connects 12 V to the rotor.
Regards.
Can that alternator run a piston broken 3000watts generator through magnetic and fuel less electricity for an output of 220 volts.
This man gets excited a hell of a lot
Hi great video and explanation but will the output be uncontrolled in this mode
Self exited means a small voltage turns it on.Its a electromagnet and is turned on when ignition is on.Exicted means it turns on only.This small voltage has nothing to do with output.Tinker toys or building blocks might suit him better.
I got a new 3000 watts generator 7 hp but with a busted piston maybe due to overheating. Can an alternator run it instead of an engine?
Can I use a copper wire instead of a felament?
Yes but super thin
Ninety amps. I never would have imagined it puts out anywhere near that. Did you add a zero by mistake?
BRAVO!! EXCELLENT!! Teaching!!
if you are using led brake lights without some kind of voltage equalizer, it can keep your alternator form charging your battery
Thanks man, u r great! can i use it as wind trubine motor?
With reducer gear box
Dear Mr.Electron, please suggest me one device which converts 12v/14v DC generated by alternator to 220VAC with constant AC voltage irrespective of alternator rpm
Good qwn..
@@pinjalgajjar718 Brother I am not questioning him, asking him to help in finding such device in market
@@nomulakarunakar5510 ya i know,
i also want to find that device that's why i said good qwn..
if i left a comment here & if mr. electron reply to your qwn then i can read his answer in your comment section that will be answer for me too..
@@nomulakarunakar5510 - You are looking for an *inverter* -- a device that takes the 12-14 DC volts of an alternator and changes it to the regulated 220 volts AC that you want. Note that if you are going to do this with an alternator, you should also have a 12 volt battery connected to the alternator to stabilize its output voltage as it does when used in a vehicle.
How many wattage?