BLDC motor from an automotive alternator / Harjatontasavirtamoottori autonlaturista

[aptosguy]

As automotive alternators have slip rings and brushes I do not believe this would really be considered a brushless DC motor made from an alternator. You can in fact, however, run the alternator as a motor.

[paloperse]

@aptosguy True, idea was to test the performance with the rotors original electromagnet to determine if it would be worth it to replace it with a permanent magnet rotor. I'm currantly in the process of makeing a permanent magnet rotor for my alternator.

[chilidress]

where can i find bldc driver schematics?i want to run a 13v 80amp car alternator at 24v max and around 30amp

[ganisierva]

Hi Sir's can you suggest where can i find the schematic diagram of the driver motor that you used or something that could hold 1kw motor. Thanks! I appreciate the help

[DKJones96]

Nice! If anything, it makes a sweet variable speed fan! haha

[4mulas]

works better as alternator

[forbearsake]

what is the purpose other to see it spin, will this be applied to some piratical use

I'm not asking to be sarcastic. i just cant see spending I guess 20 euros with out any real use

[ffred86]

Nice! Did you change the windings from Wye to Delta for the alternator before you run it?

[paloperse]

@ffred86 No, I kept them in Y configuration. You can't run a Delta wound motor in this manner. Delta motors must be run with true 3 phase AC.

[ffred86]

@paloperse I face another problem. How did you control the motion of the WYE motor? U use digital signal to power each phase? e.g. Phase 1 = HI Phase 2 = LO Phase 3 = LO; Phase 1 = LO Phase 2 = HI Phase 3 = LO; Phase 1 = LO Phase 2 = LO Phase 3 = HI. How much voltage and current did you use to power it on HI? 12V 60A from a normal 12V lead acid battery? Is that possible? Thanks again!

[ffred86]

Nice! Did you change the alternator windings from WYE to DELTA?

[godin007]

take the inner coil out and replace it with earth magnets. there's your brushless.

[trinicaleb]

what range of wattage output or hp comparison would you estimate a motor such as this to generate ? for example would it have enough torgue and hp to efficiently move a bicycle with a 200lb person.

[Hydropower72]

Hello, God job

Do you have a plan for this electric configuration. I try to make this experience.

Thanks

[forbearsake]

what is use? are you going to use this for something or just look at spin?

[paloperse]

@forbearsake Learing about 3 phase motor control was the main goal during this project and to test an alternators viability as a motor.

[MrBoy219]

@forbearsake he might make a hybrid out of the electric motors

[animebsd]

waaaay cool! i always wanted to do this with an alternator!

[transfusablepng]

Free Energy is real and its here! The Oil companies are doing everything in their power to stop these information. If you want a Free energy machine do a search in youtube for the LT MAGNET MOTOR , Join the revolution!

[badjester80]

Nice job! That's awesome. Could this be controlled by any controller for brushless motors, supplying the correct current to the brushes seperately? I've seen upwards of $1000 for a controller for that bad boy and $50-$150 for other controllers that may or may not be compatible. I really have no idea. Anyways... yea that's friggin' great. props.

[paloperse]

Any sensorless BLDC controller should work in principle, to get more power have better operation a new roto should be made for it with permanent magnets. Neodymium(rare earth magnets) would be best as they have a very strong magnetic field.

[stinkfoot151]

@paloperse Yes rare earth magnets will increase efficiency by not wasting power energizing the rotor but you're better off keeping them. Lowering the rotor current weakens the magnetic field and allows the "motor" to spin faster as the 3 phase AC frequency powering it increases assuming 3 phase voltage to the stator is fixed. This gives higher rpm at less torque, conversely increasing rotor current gives higher torque at lower rpm. This makes a gearshift or shifting sprockets unnecessary.

[Circlotron]

@stinkfoot151 Monitor the stator current while raising and lowering the rotor current. The ideal rotor current at any time is when the stator current is lowest. Either side of this the stator will have either leading or lagging power factor. For more information see "Synchronous condenser" in wikipedia.

[aphh3]

@paloperse

Voisiko moottoria käyttää sähköisen turboahtimen pyörittämiseen? Idea olisi se, että kun kaasupoljin painetaan pohjaan, moottori ja sähköturbo lähtisi käyntiin ja nostaisi hetkellisesti ilmanpainetta imusarjassa. Näin vääntömomentti kasvaisi matalilla kierrosnopeuksilla ja auto kiihtyisi paremmin. Toisin sanoen sähköturboa tarvittaisiin vain kiihdytyksen ajan.

[paloperse]

@aphh3 En nää mitään syytä miksi ei voisi periaatteessa. Olen joskus miettinyt sähköturboahdinta autoon itsekkin rakentaa. Ehdottomasti kannattaisi rakentaa uusi roottori jossa olisi neodymium kestomagneetit jos haluaa käyttää autonlaturia moottorina siihen.

[TrooperManaic]

you think that motor is powerful enough to power a motorcycle, I could possibly use 2 to add alittle extra power, I wanna build an electric motorcycle and I dont want to spend allot of money.

[paloperse]

My advice having built an electric motorcycle, vids coming soon, would be to get a ready to use motor and controller. Maybe you could find a used motor and even a usen controller for less the $ than new ones. Oh and a good way to plan out how to mount everything is to make cardboard mockups of everything.

[EricSerenaKnutsonCov]

how did you make this run

[paloperse]

Kinda of a long sotry really... But I connected power to the rotor to make it act in the same way as a permanent magnet. Then built a 3-phase MOSFET bridge and used it to power the stator coils in the proper commutation sequence.

[hameeds01]

how much poles that alternator has ?? & y u have just used one hall effect sensor ?

[paloperse]

6 poles and in this setup only one Hall-effect sensor, the sensor can se every commutation step so the controller just goes to the next one after the sensor output changes. It doesn't syncronize but it worked supprisingly well.

[thymessenger]

i love it

[ImYourLastResort]

Why advertise the clip as a BLDC motor if by your own admission you have not made a BLDC motor ;)

[paloperse]

Hi there, because the same basic operation principle is the same. I have also mentioned that to make it a BLDC motor all that needs to be done is to place permanent magnets on the rotor.

[mbunds]

Any idea how much torque you're getting?

[paloperse]

No not really, but not enough for the gear ratio i have. But with the dual reduction i'm going to set up when i get the chance it should have plenty torque at the wheel. With the new ratio the alternator will spin close to 7000 rpm at top speed

[jmygann]

How many volts ?

Hall sensors ??

[paloperse]

In this video the stator is hocked up to the power supply on the right thats set at 17.9 Volts, and i used only one hall sensor and 36 permanent magnets for position sensing. So it can't see where the rotor is only if its time for the next commutation step, worked suprising well though.

[sergio5350]

hi! i'm giorgio , i saw your videos and i'd like to ask you if you tried to couple an alternator to produce elettricity and if have other videos.

regards giorgio

[egn83b]

sounds just like a jet engine powering down with flying in mid air and power up again.

[JS106351]

Great video! Looks like the alternator is commutated by hall sensors, not back EMF.

By the way, how did you make the tachometer? Any Schematics on it?

[electrique527]

Yes, same idea as I have :)

I dont want to make the controller, looking for a brushless DC motor controller.

And a PWM regulator for the field.

Any tips?

Richard

[paloperse]

Well i would recomend using a small Mircocontroller for generating and controlling the PWM for the rotors electromagnet.

[poweruser69]

that is exactly what I am wanting to do

I have my alternator tore apart but I do not know how to controll it with 3 phase.I have bought some irf3205 transistors

to carry the load but that is as far as I've got.

[poweruser69]

how about another vid for more info?

[paloperse]

There will be a lot more videos. It's taken me about 4 moths to get this far and theres tons to explain. And it's not over yet, i'm making an electic bike.

[kanootti4wd]

MOI!

And you are not using permanent magnets IN, brushes and coil still there! What are you giving in film to the axel coil? CD or else?

[paloperse]

"CD or else?" You mean DC right? Direct Current is whats connected to the rotors coil from the adjustable power supply on the left.