Convert Alternator to Brushless Motor

How to convert an alternator to a motor. How to wire an alternator to a DC motor. How to wire an alternator to a brushless motor. Using an electronic speed controller ESC this video shows you how to wire an alternator to become a brushless motor. Explaining Y wiring and delta wiring. How to wire electronic speed controller.
used alternator
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new alternator
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36V/48V Speed Controller 350W
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36V 40A speed controller
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36v Battery
ebay.us/URkcxU

[@danielfietkau733]

If I understood that right, the voltages on the rotor are trial and error, limited by the 12V on the stator. Is there a way to calculate the perfect ratio for the two voltages? What specs might we need to do that? Is the ratio linear or does it change by the amount of voltage put on the rotor?

[@mohdjanimohdtaib2356]

lol pi llllll

[@mpirron1]

P

[@danielfietkau733]

@@mohdjanimohdtaib2356 bot

[@danielfietkau733]

@@mpirron1 P? Is this your answer to one of my questions or to all of them ?

[@prisnrev5265]

1 : 6 comparison 2 volt rotor, 12 volt stator, I know it since i read comment from other youtube channel.

[@MadsWorld34]

finally someone that explanes it in detail. not just a video of them cutting wires removing stuff and never saying a word. thanks i am going to try this today.

[@minhle8828]

Did it work? Was it successful?

[@MadsWorld34]

@@minhle8828 i never got around to it. its been so long i dont even remember i never got around to it.

[@jimviau327]

Actually, the voltage on the rotor will only influence the maximum torque the "motor" will exhibit. The reason speed is lower when using two cells to power the rotor is that the rotor draws too much current, hence a drop of voltage for the electronic driver which feeds the 3ph stator. This is why there is an electronic regulator to control the rotor current. The way to set the current on the stator is you must feed as much current as necessary so that no slippage arise. Some 3ph drivers have a power input separate from the supply input such that you can put the power input in series with the rotor winding. This way the rotor is then feed with a current dependent on the power required by the driver. Otherwise you need to drive the rotor current determined by another electronic circuit. Or use a resistor to limit the current, but this method will loose battery power into heat from the resistor. Be careful not to feed too much current into the rotor for it can easily burn. Great video. Thanks for sharing.

[@Eduardo_Espinoza]

I had a feeling it was like the SepEx field golf kart motors, they have another field to power too & It acts the same way. Tnx 4 sharing 😊

[@empireofdirt7536]

The two brushes connect to the the slip rings on the rotor. What you call the "Middle part ". It rotates, and is a rotor. The stater is stationary and outside the rotor mounted in the housing.

[@antoniodevilla5926]

You’re the best presenter because you talk as you demonstrate. Others are doing like magicians. Its up to the viewer to interpret if he is good enough to pick up.

[@eddieday1124]

KZbin is a 5 star app to me, and very helpful in showing DIY video’s

[@dgb5820]

I keep coming back to your video because you get to the point without telling me how good you are. Really appreciate the simple list of components required

[@extremesheepherder9]

The center part that spins is called a "rotor", because it rotates.... sometimes it is called an armature. A stator is from the latin root word "static" meaning it does not move... it is the laminated iron part with copper windings around the outside of the device. In this instance the stator is obscured by the casing. Also, you put the brushes back in, so not really brushless eh?

[@JustStayingGroovy]

WRONG! Lol. I'm just kidding. You're dead on.

[@davelowets]

"Semi-brushless"... 🤷🏻 Still works exactly the same as a brushless motor, it just has an electromagnet instead of a permanent magnet.

[@VulcaNtGoF]

3 phase induction motor

[@davelowets]

@@VulcaNtGoF A 3-phase induction motor works completely differently

[@dmayniak]

I think it's technically it's a bldc with electromagnetic rotor. And if you have a way of replacing the rotor with permanent magnets.. is love to hear about that... Maybe you have a better way of adding power to the rotor to give it a electromagnetic charge? The stator needs a field to push upon our is but going to spin..

[@QuebecTerreaTerre]

Very bold and with rudimentary tools. Scrap yards cur the wire coming out of the alternator because unscrewing the nut usually break the insulator. I recommend grinding the nut. (Penetrating fluid may work but you usually end up breaking the insulator. Then game over! )

[@prisnrev5265]

I had been thingking about using ESC for controlling motor 12v alternator, finally I found on this video, this is the answer, ok thanks for your share

[@2ndamendment770]

Good Job , this helps as to understanding the Concept !

[@javasyndicate713]

No need open the coils, nice explained, Thank you

[@mckenziekeith7434]

This is an excellent video despite some of the terminology being wrong (as various commenters have pointed out ad nausea). I like the fact that you showed exactly what you were doing and the result. I have some theoretical background in how everything works so I don't care about all that. I just wanted to see how you take it apart to get an idea of how complicated the process is. Keep up the good work!

[@KUBA64official]

Thanks a lot for this video. I knew the theory of converting alternator into a BLDC motor but I was not sure about overheating by lower RPMs (which means lower frequency.) One of my customers asked me how to do that so I sent him Your video. You did really good job.

[@wifie9321]

It's not brushless since he put the brushes back in.

[@KUBA64official]

But brushes don’t interrupt the current into rotating coils as in normal brushed motor. There is only one pole and rotor coils work like a permanent magnet.

[@wifie9321]

@@KUBA64official take the brushes out. Would it work?

[@davelowets]

@@wifie9321 The brushes only provide current to the rotor to operate the electromagnet, since it doesn't have permament magnets. Only a small current passes through the brushes, and the main motor current does not. The rest of it operates the exact same way as a brushless DC motor.

[@wifie9321]

@@davelowets but it has brushes to provide power. Without them it cannot work unless you replace parts. Until the magnet is replaced to eliminate this problem, it is a brushed DC motor.

[@tigerseye73]

At 5:15 ,The copper slip rings are not for the stator. They provide a current path for the field, which is wound on the rotor. The part that spins. The field requires only a small current to excite the main output coils that are wound on the stator ; the stationary coils, which produce 3-phase alternating current. The diode- triple converts the A/C into ripple DC, which charges the battery. Vehicle alternators do not make efficient motors. Not designed for that purpose. The pulley shaft on most of them are not even keyed for the purpose of driving the pulley, but rely solely on the shaft nut to squeeze the pulley to the shaft. Even under load, the rotor does not require a large amount of torque to rotate. Real motors require a key way or spline shaft to drive a load, as well as a ruggedly built rotor.

[@gingerehrhardt843]

Good job in describing/teaching. I've been trying to learn how to do this and I understand so much better now.

[@damdav52]

INTP boys and girls. The 10 yr old taking stuff apart to see how it works. Tomorrow s engineers and technicians scientists

[@chasjacks9378]

I am watching a different video. The video I am watching is a guy making a video on something he has never done and knows nothing about.

[@joetrump5844]

Cheapest way to power up a DIY small multihull fishing 🎣 platform. Recycling Alternators to motors......... thank you for sharing your videos. I can use this information to power my home built boat 🚣‍♀️. Peace

[@gerrys6265]

Thanks for sharing..great video and instruction.

[@RWBHere]

The middle part is the ROTOR because it ROTATES. The clue is in the name. 😉

[@RCBIGFLYER1]

WHAT AN EXCELLENT VIDEO! MAKING A BRUSHLESS ELECTRIC MOTOR CAN HAVE MANY APPLICATIONS. I BELIEVE POWER AVAILABLE IS ONLY BASED ON SIZE SPEED CONTROLLER YOU CHOOSE, AND THE AMOUNT OF BATTERY VOLTAGE YOU APPLY.

[@kaisersose5549]

Until you exceed a voltage the insulation on the windings can withstand, arc through the insulation & create a short circuit... or overheat the windings, melting the insulation and creating a short circuit. Given that the armature shaft is steel, it's gonna produce a whole bunch of eddy currents. Eddy currents produce a great deal of heat. Think of a large air core inductor with a piece of steel passed inside while it's energized. While I don't doubt that an automotive alternator can be over amped/over voltage, there are limitations to doing so... for our own safety. The wire gauge of the windings would be a quick way to get an approximate safe maximum input/output. The more voltage used, the greater chance of arcing. The more amperage used, the greater chance of overheating.

[@paulbade3566]

@@kaisersose5549 … or overspeed the bearings, or overload them or the windings with too much load. Typically, a motor will stall first in the latter condition, but an alternator may be more lightly built than a typical motor. The original wattage rating of the alternator should be a good indication of the motor's limits.

[@MrHidibo]

Great video awesome information and great walk through, grab a few more tools and a few more connections lol

[@ChrisG3253032]

Good stuff. I have an old, but good condition alternator from an old Mitsubishi V3000. I want to maybe make my old bicycle into a E-Bike by using this method.

[@MadeEasyChannel]

Let me know how it works

[@nikolasjanku4845]

I would like to know if it works as well and if at 36volts does it produce enough torque to pull a person because my bike is currently 65pounds with a single hub motor on it I want to make a awd with the rear driven by alternator motor on either chain or possibly belt driven like the surons segways ect

[@soloman9151]

A guy has already done that FYI - but there may be others - but it's not possible to view every YT channels and contents thereof - and you probably just missed it but I'm interested in Alternator conversions for the reasons I've covered in my comment above to the host of this Channel - so I've simply selected this one [the only one I viewed ] for you - to show the possible pitfalls and/or success of the project - which seems quite do-able nevertheless. A link to that vid - From my You Tube viewing history: Bicycle Conversion using a 10,000 Watt Car Alternator 1,085,836 views Oct 15, 2021 "In this DIY project video we are going to convert our bicycle into an electric one. We are going to use a car alternnator that we have converted to a permanent magnnet brushless motor that we have converted in previous project video. Have a look at this project video as we are goingto have lots of fun building this bicycle. More information about the material and designs visit the instructables article link:" Hope this helps - good luck with your project.

[@nalakprince6376]

Those funny little screws are Torx screws. You need a Torx toolkit.. 👍👍🙂

[@RWBHere]

The local scrapyard should sell you a good alternator for less than you paid for that one.

[@insanescience8106]

This is an awsome video man!

[@Vankaner]

Good video nicely done. Thank you.

[@sspence65]

Bring out all 6 wires, and you can switch between delta and wye on the fly, and basically have a 2 speed motor.

[@tamiebasse6595]

Speed will match the AC output of the ESC. Speed is limited by back EMF from the stator. It cannot exceed power supply voltage. Delta tends to have lower voltage than Wye but greater torque. Lowering brush voltage will weaken the field and allow greater RPM but with less torque.

[@oldbloke135]

You need to re-title this. "How to use a car alternator as a motor with electronic speed control" maybe? To make it brushless you'd need to replace the wound rotor with a permanent magnet one.

[@dave95377]

I was exited until i saw the brushes go back in

[@martintai3004]

@@dave95377 me too, can I ask for a refund of my 15min?

[@stpeter7432]

Yes, indeed! Also you refer to " Delta and Star connected resistors"; They are the stator WINDINGS.

[@rctopfueler2841]

oh good its nor me alone wondering how brushless needs brushes ..none i own have any brushes

[@dmayniak]

@@dave95377 so your missing the point of the brushes, they are pretending to be the permanent magnets.. if the winding is a reverse stator, you need the center piece to act like the permanent magnet, so you add a DC voltage to the center piece and it here a magnetic field so the electro magnetic field from the three ac wires have a magnetic field to push against.. you could always the center shaft out and replace it with permanent magnets... But don't have a clue how to accomplish that feat of manufacturing in as short a time as adding DC power to it instead.. it's actually kind of genius, cuz making that center piece into day a 4 pole permanent magnet in my garage would be impossible, especially if I wanted to spin that up to 2000 rpms. The DC brushes are a excellent substitute.

[@maryjaneevadiamond6359]

The coil in the middle is called the rotor. Those brushes are at if not very close to end of life. You should have to load them with spring pressure to make sure there is contact. You could have intermittent contact if they are super worn and judging from the strong moon curve in them, they are pretty worn. The STATER is the larger windings that run along the outer part of the workings. The plus terminal on the brushes is called the field. Typically controlled by the voltage regulator, (That piece you broke off) working in a way that a small applied voltage renders a multiplied voltage on the output, provided the rotor is turning. I'm questioning if the voltage to the rotor was backwards but it was hard to see how you had them wired to the battery pack. FYI, you don't even have to run a power rotor, you can replace the coils with magnets, like a motor. I used to work on an assembly line for a reman shop. I found this video pretty educational however.

[@Eduardo_Espinoza]

Woah, this comment in itself was like an informative video! :D Tnx for sharing! 😊

[@MrGGPRI]

The vehicle alternator is a very special design of generator in that the field and armature (rotor) are REVERSED so the rotor/armature is now the field and the fixed outer coil now functions as the armature. This unique rotor is known the alternator-claw design, aka bear-claw and supplies much higher current to the battery and at a lower RPM.

[@mastermachine869]

nice one. Thanks for sharing your knowledge

[@_pacalis]

Hi, thanks for your work on this. Really great. I was wanting to convert an alternator to a motor and run it off a 12V vehicle battery. Would a 48V ESC work? Or would you need a different setup

[@MadeEasyChannel]

36v or 48v would work!

[@foxxyytofficial]

any esc voltage from 24V to 72V on the stator would work (if you use 4-12V on the rotor brushes), just need to cool the alternator or use pipes/something to guide air to the alternator depending on the voltage

[@kimbo3068]

Good Video Young Man & by now i think you know the Diff between Rotor & Stator Great work!!

[@MadeEasyChannel]

Yes I learned it, I appreciate it

[@gunghoadventures871]

Thanks for sharing . Great help

[@dgb5820]

Awesome really love this subject

[@chrisholloway2853]

You incorrectly refer to the rotor as the stator. The rotor is the magnetic field created by the application of 12volts DC or less to the brushes. It rotates, so it is the rotor. The stator is a 3 phase array of windings which is supplied with the main motor current. It doesn't rotate so it is the stator. The high current to the stator is controlled by the ESC which puts out a 3 phase AC pulse width modulated current.

[@MadeEasyChannel]

Thank you for explaining this to me.

[@antoinemifsud4019]

He's exactly right Spinning = Rotor Body Coils = Stator What you did is a motor that can be controlled either way you want, less power sent to the rotor you're going to have more revs but less tourqe and obviously more power sent to the rotor it'll slow your revs down but have more torque, you can play with stator and rotor individually so you get whatever you want, bare in mind that this alternator was designed for a 12 volt system so my advice is to not exceed 12 volts !! Good luck interesting video

[@russashworth1340]

correct on the id of the parts. Stator...stationary...Rotor rotates

[@jonspeak2807]

Thank you 🙏 a lot of useful information.

[@gregstafford2155]

Rc brushless motors spin faster in delta configuration that's why they use more amps than y configuration

[@ronohler3339]

A motor connected in a Delta configuration will draw more amps than if it were connected in a Y configuration due to the fact that the Y configuration places the windings in series - adding the coil resistance values.

[@trabant_e_drive]

Good job. I redid the generator and installed it on an electric car. The video is on my channel.

[@newton4098]

nothing in english ?

[@mckenziekeith7434]

Changing the field voltage (the dc voltage) is like changing the motor Kv. Higher voltage means lower Kv and lower voltage means higher Kv. Permanent magnet motors can't change Kv on the fly but this type of motor (with a wound rotor and controllable field) can.

[@ethanweeter2732]

I would have cleaned my commutator too. Those copper leads get carbon fine buildup that causes issues with consistent rotation down the road as the brushes wear out. I think a battery lead cleaner will help with that, or green Scotchbrite pads.

[@w.dkalyan6234]

Friend your effort on this motor is very good 👌 friend

[@MuscatZulu]

Just wondering why the title says “brushless”

[@harrytaylor5053]

)

[@kingkoopa8996]

he doesnt know, this is clearly his first time lol

[@deankay4434]

It is brushless because he removed the brushes. Then, put them back in. So, technically it was brushless for a few minutes, even though it would not work. The only part that came in a box when I started fixing vehicles, they where new from the dealer.

[@andrewmcfarland57]

Yeah. I think its in the "drive it with an brushless motor controller, (with brushes and a stator instead of permanent magnets.)" But I'm sure he meant well :-)

[@connordziadul6048]

@@kingkoopa8996 well he knows enough to give a -for the most part- accurate tutorial on how to do the conversion from alternator to motor.

[@grindstone007]

My man you still have da brushes 😂

[@alexgudino5544]

Hi! How can I choose the battery for my alternator? Which are the characteristics I should look at? Great video man!

[@MadeEasyChannel]

You choose it based on the voltage of the speed controller. If your speed controller is 36v then that's the battery that you need

[@torfinnsrnes6232]

The Y vs D configuration has nothing to do with rpm. It is the number of poles that decides the rpm.

[@hardnachopuppy]

In case of synchronous motors y and d configuration changes the rpm

[@russashworth1340]

correct .A.C drives in industry vary the speed of an induction motor by varying frequency, since poles are fixed ( except single phase consequent pole motors ). These are the two main factors which determine motor rpm.- % slippage.

[@Backwater-wanderer]

This is a really interesting idea, when choosing an alternator are some better than others? For instance would a truck alternator be stronger than an alternator from a smaller car? Are older alternators easier to disassemble? Thanks! Great video.

[@russashworth1340]

alternators are rated in OutPut AMPS. In the automotive application, they are more a current source. While a car is running the out put voltage from the alternator will climb above the 12v of the battery. Usually 13 to 14 volts, This insures that current loads like fan motor defrost strips etc are all supplied from the alternator, not the battery

[@ko0d3ta]

First off, good work on your project. Just want to clarify that delta or wye configuration don't effect the speed of the motor and mostly are used for starting and running currents. Also you can't for sure tell the difference between how they are connected on the inside by just observing 3 wires, since both configurations will have 3 leads out. Best way would be to separate all the coils and do ohm check to determine the true configuration. Also since alternators don't have magnets inside them, you are feeding the rotor a small voltage to create the magnet, and doesn't mean you need 48 volts to run the motor. When voltage is high, you have higher magnetic effect and your driver doesn't have enough current to overcome the magnetic field generated. A drive with higher current output should do the job, most alternators will produce around 90A, so somewhere around that number would make the motor work too.

[@davelowets]

He ran it on 12.6 volts. Not 48. Wise up.

[@ko0d3ta]

@@davelowets watch the whole video

[@mannys8259]

you can tell the difference between wye and delta without taking it apart. delta will have 2 or 4 wire ends at each 3 points. Wye will only have 1.

[@ko0d3ta]

@@mannys8259 not necessarily true, in most common 3 phase application, you will have 6 leads coming out of the motor/ generator. also there are motors with 9 or 12 leads which makes it harder to just tell by simply visually looking for one or two wires.

[@Maxttor]

Bro thanks 4 your vid, could you pls say me if this alternator worked well? and about how much time it worked using what voltage ?

[@ethanweeter2732]

Realized how possible this way when I thought about what an alternator is, a power converter that could be easily converted into a motor since power conversion is like a motor.

[@johngraham4965]

building a bicyckle with my delta alternator,awesome?going to build one for my other bike with a y diagram version,and find me a couple speed controllers?

[@jairogarcia239]

EXCELENTE¡

[@anascottwelding1761]

wouldn't the armature be burning out? having it constantly connected to the battery and the motor not running, while your adjusting things. Do you know what the issues were in the beginning when it would only run then stop , for about 4s? Love you work and channel. I love how you explain every thing while you are working and diagnosing. Thanks Mate, Keep up the great work

[@t-6273]

Not a brushless motor.... You have to apply a voltage to the brushes and energize the coils in the rotor so that it acts as an electromagnet. Then when you run the power from the brushless motor controller to the 3 winding wires in the stator it will run. Regulate the voltage and current running to the rotor and you increase/decrease the strength of the field and vary motor power.

[@jonjudice1155]

I don't have a brushless controller yet but I do have an electric chainsaw that I can no longer get batteries for so I took the control unit from it which is for a brushless motor and all mine does is twitch like yours did at first. Any suggestions

[@Microplastic_Therapy]

I would recommend not removing the fan/blower if you want your motor to last

[@davelowets]

He didn't remove it. This type of alternator does NOT have an external "fan" to remove. Your recommendation is irrelevant here.

[@brianblowers8448]

If you take a brush wire and wire to winding and wire the other 2 windings together the one winding is negative and one brush wire positive and only need on 12 volt feed for both

[@gulabkeerio1930]

good job

[@cherilynnfisher5658]

Thank you!

[@davef5208]

What can you do with the 3 wires if you don't have a speed controller? Maybe just make it run full power?

[@chadwolfeschledgelsteinhau9697]

Good job!

[@gabrielkelekolio4317]

Nice work

[@gijsvangent9807]

Hi, At 3.30am you told to explain the different alternators in a next video. I have disassembled a stator from a 24V 120A alternator to measure each coil. in total there are now 12 separate wires coming out of the stator. How can I reassemble it into a star configuration? I'd be happy to send a photo if possible. Thanks in advance!

[@vagautohaus4492]

does increasing the voltage to the coil increase torque while lowering speed?

[@4wheelsbyDavid]

great video! how to connect it if alternator have a 4 wires??? thanks

[@renehuitsing6261]

How much tork does it make... could you use someting like this for a boat?

[@LubaLuba1]

I wish you would explain more are you connecting body of alternator with hot wire from battery??

[@waitemc]

What about a big truck altanator. Semi truck . I'd love to see if I could get one of the to run on a vfd.

[@RWBHere]

It a standard alternator from an older small car. Scrapyards sell them for $10 to $20, in better condition than this one.

[@davelowets]

Some are 24 volt systems.. Watch out

[@garyjones7268]

Yes i wonder what a semi alternator would be as well and if you can put a speed controller on it.

[@extremesheepherder9]

Most of those are 24V, probably higher current too.

[@axellans4394]

What type of batteries can it use? Wondering because i got a nimh laying around and im planning on building a electric go kart

[@onekycarscanners6002]

on this alternator what power of battery will be needed to power a go cart or golf buggy for 50km range. thanks .

[@westmontroque7061]

You call it a brushless motor but you use the carbon brush?

[@davelowets]

The brush only powers the electromagnet, because the motor lacks a permanent magnet. The main motor current doesn't go through the brushes. It still functions exactly as a normal brushless motor does otherwise.

[@davelowets]

@@everydayirace WTF are you laughing about? You didnt know.. 🙄

[@bobbylong2202]

Wow thanks I have a old alt and was wondering what to do with it

[@ClaudioSilva-fe1zi]

Nice video, good explanation and it's indeed a motor...just not a brushless one...it has brushes on the rotor...

[@ClaudioSilva-fe1zi]

and it could actually be converted to brushless...just put some magnets on the rotor

[@ClaudioSilva-fe1zi]

Also rotor is the part that turns not the other way around

[@sallehaiman1928]

Can I use house day and night non stop or wat

[@waynegilchrist1596]

If I am understanding what I am seeing, you are running this on those 3 or 4 and no more than 6 little batteries and you did not connect to any other power source, right? If so I am really impressed with the torque when you kick that thing over! My question is rhetorical - no answer required unless someone wants to correct my understanding or lack thereof. Great and interesting video.

[@user-yn2go9qv8r]

thanks I like this video

[@brianashley5899]

Would it be possible using switching relays to switch between motor and alternator functions so it could be used to start an engine then charge the battery whilst running.

[@foxxyytofficial]

you can't

[@nicknapolitane1909]

Ok I did what you said. But my alternator locks up when powered then spins free after power off? Any thoughts would be great

[@davelowets]

Probably a Wye connected alternator hooked up to a Delta controller.

[@teamlaguna]

WOW nice pile of tools there Chief

[@salimkumar9748]

Thanks

[@patrickmollevanger9666]

Do u need the ese or can u Olson only run on a batery

[@droppoint495]

Is there a way to do this without the rc controller and the yellow thing like a hi lo wireing or just on when you connect to power? Great vid👍

[@boycefenn]

unfortunately this is a three phase motor which means that there is no good way to power it without a controller

[@frankmarson2425]

@@boycefenn could run a capacitor or two

[@boycefenn]

@@frankmarson2425 not sure I quite understand what you're suggesting

[@frankmarson2425]

@@boycefenn you can run a 3ph motor on single phase by using a capacitor to generate the third leg if wired in delta or if wired in star - to the center of the star + to one leg and capacitor between the other 2 may have to convert dc to ac

[@boycefenn]

@@frankmarson2425 i see, yeah that could work. in my head i was only considering DC. though even your suggestion would likely not work all that well because i think a converted alternator is an asynchronous 3ph motor so it would be prone to stalling

[@KAYAPOGAN]

Nice work, Pls tell me 01 question... can it work as a generator after removing the rectifier??

[@MadeEasyChannel]

Yes, you would need someway to turn AC to DC since now the rectifier and regulator are gone.

[@kaisersose5549]

I made mine external to allow me to use much heavier duty diodes and reduce the points of failure within the case. On the newer Ford alternators (as shown in the video) the most common mode of failure is one or more diodes shorting open. I used alternator diodes out of a tour bus from the 1970's (200 amp, 2000 amp surge), put them inside a sealed container of mineral oil, and put the contacts through the lid. Instead of the factory voltage regulator, I'm using a battery with two rheostats... One between the rectifier and battery (when I'm using DC), & one between the battery and the alternator. This allows me to use one device as a starter, generator/alternator, and primary drive motor. All built on top of a small outboard motor platform... Used to be a 7.5hp Evinrude, but it's now a 173cc predator, and belt driven to allow selection of drive motor. Just make sure you understand 3 phase AC before you start, 'cause that's exactly what an alternator without a rectifier is. It can kill you dead, before you hit the ground! There may or may not be a ground/neutral wire depending on delta v.s. wye configuration. You'll need to either make use of the individual "legs" of the three phases, or use a three phase to single phase transformer. Alternatively, three separate transformers wired together can be used with the wye configuration.

[@extremesheepherder9]

If you want to generate power with it, don't remove the rectifiers or the regulator. It is possible to make that switch on the fly, but the circuitry is a lot more complicated. Also BTW a generator is a permanent magnet device with a commutator instead of slip rings, they are less efficient and prone to failure at higher rpms as a commutator is weaker physically than solid slip rings. the reason the devices put into modern vehicles is called an alternator is that it makes alternating current (AC). Then the rectifier diodes are needed to convert to DC. Car alternators actually make very well balanced 3phase AC power,because it is more efficient.

[@KAYAPOGAN]

@@kaisersose5549 Good safety advice about killing shocks

[@KAYAPOGAN]

@@extremesheepherder9 thank you Kaptain

[@recyclebills]

Could this alternator now be used as a generator and a motor as in regenerative braking?

[@electricmanracing_mower_racing]

Hi guys. Would reverse go via the controller? I found a fairly big unit from a Cat engine. It has ac connections on the outside already. Do I still tear it apart?

[@electricmanracing_mower_racing]

I’m a complete novice. Is there anyway I can post a picture of it?

[@foxxyytofficial]

If you can send me your email we can talk about it

[@foxxyytofficial]

And yes, reverse is made by the 3 phase controller

[@hakimlkadida5121]

can't get my head around one thing, how do limit ur speed range, i'm working on the same project more or less, but i'm using an arduino board and a potentiometer, and I still get a really high output frequency of the ESC(1KHZ). I only need 60HZ

[@filipwyberg]

do you have a situation map? where can i buy this stuff? what is the specifications?

[@juniindartojuni466]

Yen matur boso jowo ae cak... Aku ben mudeng..

[@ArshaansEdits]

Bro I have an alternator with 4 wires which is in star connection. Can you please help me with the viring?

[@chrisbraid2907]

New brushes on your brushless conversion? Interesting ! You took off the bridge rectifier and regulator... then sorted the remainder ...Hang on, why are you refitting brushes to that Alternator ? ? ? Aha I guess that you didn’t remove the Armature and fit it with magnets to give it a permanent magnetic field . This is why you need battery power to energise the armature ...

[@JayDee-xj9lu]

The good thing is that the brushes doesn't carry a big load. What sort of hp can you get?

[@stefanjohansson1234]

I thought the same, not so brushless... But it has some advantages over permanent magnets, in that you can easily control the magnetic field. More current in the field coil = more torque and less revs, conversely less current = less torque and higher revs. This makes it like an automatic transmission, and you get the maximum power at all speeds (almost). This trick is why there is no need for more than one gear on electric cars for instance.

[@shanebearham4646]

@@JayDee-xj9lu being this is a 12V 140A alternator, 2hp maybe 3hp absolute max..

[@nikolasjanku4845]

I wonder if for an ebike can I move my rear hub to the front wheel and run some sort of belt drive rear wheel system to make a AWD system but run each off its own 36v controller and wire them to the same throttle the controllers out put 22amps they are brushless hub motors controllers so Idk exactly off hand but the 750 to 1000w max output. The battery on the bike now is a 36volt 29.25ah lithium ion.

[@isaacmadhavan]

Nikolas, it's been a year now and, perhaps, by now, you might have become aware of hub motors. Use a hub motor for the front wheel and you'll eliminate the necessity for motor mount and chain/belt drive on the front wheel which is rather awkward to get right.

[@AaronHendu]

Yep, I have diy dual hub motor emtb and it freaking rocks man. 48V batteries, two controllers, single throttle. Upgrading to 52V or maybe even 60/72V this season. I have an alternator sitting here as well...a pretty nice size one from a 2010 Grand Caravan. Maybe I will convert it and attach it to one of my nieces or nephews ride on toys ot something and use my old ebike controllers / 48v batteries and see what it can do. Like strap it to a push bike or something lol. I have a few keyed freewheel adapters and sprockets, couplers, etc. Basically I alrrady have everything I need but time lol

[@nicknickerson1912]

Brushes are on a slip rings which is actually the rotor and stator of the three wires cut off the diode rectifier

[@Strutingeagle]

Hims is a needin some new brushes for hims brushless motor.

[@TheRealFobican]

I have seen electric motors having around 2, 3 or 4 wires going to and from but never have I heard about nor seen ones with 6 wires coming out from an electric motor at once? What function serves the additional 5th and 6th wires to, are they made for supplying a 12v utility battery or feed the spark plugs on the engine it usually is connected with? If so then they are a perfect option for a diy regenerative braking system on each rear wheel side of any ev conversion car project as an additional bonus can improve the handling to a plus side.

[@foxxyytofficial]

the brush wires are for field current (separatedly excited, some old huge DC motors from the past also were like that)

[@davelowets]

A 3-phase motor will have 6 wires. 2 wires for each of the 3 coils.

[@robertmorin6495]

Think of it this way: a length of wire, let's say a foot long has two ends. Let's say: One end on the left and one end on the right. A coil of wire on a stator winding also has two ends. To locate or identify a coil's two ends, an ohm meter can be used. The ends of the wires are made available on the alternator after disassembly. For 3 coils you would expect 6 ends. For 6 coils you would expect 12 ends. For 12 coils you would expect 24 ends. These ends are usually soldered to the rectifier before disassembly. Sometimes two lengths of wire are wound around the same stator frame section. Instead of winding 1 wire at at a time they wind 2 at a time. This arrangement would show 4 ends per section. If there were 3 sections with two wires this way, you would see 12 ends. (3 X4)

[@badtensioner]

I fell from my chair laughing my ass out.

[@danielfietkau733]

Good for you? Care to tell us why?

[@WBracknell]

What does that mean? What did you see in error?

[@abuxxx3607]

his ass has higher rpm than the motor!

[@sspence65]

@@WBracknell stator vs. rotor?

[@davelowets]

You laugh out of your ass?? 😕

[@ebosetaezekiel]

Video on how to wire alternator with 4 wire terminal

[@rogerfoster3997]

why one would want to turn one into a motor I don't know but it was an interesting video

[@letaku6348]

Could a 12v car battery power a 1000w speed controller i have no idea about this kind of stuff

[@fuddwacker4803]

What would you charge me to build one for me and how do you get it to produce power for a plug 8n

[@chibuzo7746]

What else can I use to control the speed, I don't have your kind of speed controller Also, how is the power distributed among the 3 terminals

[@2pi628]

DC pulses 120 degrees apart. Thats what the motor controller does. They use a microcontroller programmed to send voltage to each leg of the stator delayed by 120 degrees of rotor rotation with respect to the speed of rotation. The voltage is sent via 3 large MOSFET transistors -- used as a current valve by the microcontroller. The faster the speed the longer duration the pulses are going to the (3)MOSFETS. They may use more MOSFETs for one reason or another but this just a simplified explanation. I've never built one.

[@ElectricBillAlbright]

@@2pi628 thats a pretty good explanation of it. Its PWM pulse width modulation and the duration as you stated is the "on time" of the pulse also expressed as the duty cycle. A 50% duty cycle would be a pulse thats on equal to its time off. A 60% would mean its on 60% and off 40% causing the motor to run faster. The reason they may use many MOSFETS is for more current capability. They parallel them up to get more current. Same with power inverters, they have a whole bank of them on high output inverters. Thats why when one MOSFET fails it wipes out all of them due to parallel configuration. Some of those bike motors built into the wheel hub have about 10 wires. I think the speed control pulses each winding in a sequential order with PWM. I'm pretty sure this method is real efficient for the amount of power out to turn the bike wheel. This alternator conversion is very similar using less coils.