The alternator is connected to the car engine, not the wheels or the drive shaft as some people think. There's also a regulator connected to the alternator to make sure the voltage that goes into the lead acid battery is at a stable current. If this regulator fails, you will feed the battery with a much higher voltage when you rev your engine.
I don't get it; if the battery needs to supply current to those coils to turn them into electromagnets in the first place, how can the alternator supply current for the battery (and thus recharging it)?
@@lucasf.v.n.4197the speed in which the alternator is spun at in conjunction with how tight and thick the windings in the field and stator are (along with if the stator is either wye or delta wound), determine the current output, which is usually more than enough to push amps back into the battery during charging.
@@chrismarek7864 this doesn't answer my question; the alternator needs the coil to act as an electromagnet; it only happens if there's current passing through the coil; where does this current come from in the first place? it can't be due to the battery, otherwise it would imply the battery can suply current and be recharged simultaneously;
@@lucasf.v.n.4197 the current does come from the battery at first. It’s called pre-excitation voltage. And once this is fed into the field while the rotor is spinning, it kick starts the generation of alternating current. How thick and tight the windings are along with how fast the rotor is spinning as it passes by each phase of the stator windings determines how much current is produced, and the magnetic fields from both the field and stator windings are sustained as long as the rotor is turning.
@@lucasf.v.n.4197 to produces electricity metal wire cutting magnetic field is a must alternator shaft spins,magnetic field will be cut by the metal wire layer, shaft turns magnetic when in need to produce electricity. End of the Shaft has pulley that is belt driven by crank pulley.
Hi, So if like the initial "pre-magnetisation" of the rotor is supplied by the car's 12V battery, how much current is needed ? What is then like the "idle current" (that is supplied into the rotor) ? 🤔 The rotor copper wire winding is not of the same thickness as the copper windings on the stator part right ? If so why not ? Because how can then an alternator be producing like 100 A if the rotor copper winding is thinner then the ones on the stator assembly ? 😶😕 Also how is the ratio between like the speed of an alternator versus the input rotor magnetisation (amps in particular) - in comparison to the output power it supplies (amps again) ? The faster it spins & the more amps we deliver to the rotor more amps will be generated on the output or... ? 😞😳 Thanks ! 😇🤗 Best Regards,
That's why alts have regulators. So that they don't overcharge the battery and boil it. Plus electrical power costs engine horsepower and costs economy. There's no free lunch
You lucky bastard I had to desolder the leads connecting the stator winding to the regulator deliveey circuit to be able do dissassemble the alternator
I don't get it; if the battery needs to supply current to those coils to turn them into electromagnets in the first place, how can the alternator supply current for the battery (and thus recharging it)?
The alternator has its own magnet (the rotor component)... the engine is connected to the rotor via a pulley system and causes it to spin. Once the rotor is spinning, it induces an AC current in the coils. The AC current is converted to DC current and recharges the battery.
@@andrewstears2726 the rotor component isn't a permanent magnet; is basically coil, so there needs to be an initial current to turn the coil into an electromagnet; where does this initial current come from?
@@lucasf.v.n.4197 so remember that electricity can be created by spinning a magnet in a coil of wire, and you can make a magnet by running electricity through the coil. It's a vice versa relationship. So the battery gets the engine moving and the engine runs on its own. With gasoline. To keep it simple, the battery doesn't keep the engine alive other than powering the pumps to give it fuel. The engine has a shaft that spins, so just pretend we put a magnet on the shaft and put s coil around it. (the alternator). When the engine spins the magnet, it creates electricity. So we just use that electricity to send it back to the battery to recharge it. Hope this makes sense.
@@iwishtobetexan6060 my whole confusion was due to that epsode in Breaking Bad that they are lost in the desert and Walt tries to recharge the battery using the alternator simply by turning the lever several times; I was wondering how that was possible considering the coil needs to have current flowing to act as an electromagnet, which then would generate current by induction in the other coil; I believe the answer has something to do with self-excited generators though, but I don't understand how they work
@@lucasf.v.n.4197 I've never seen breaking bad but remember movies are pretty inaccurate to reality. I think your overthinking everything. Start simple.
@@bobi_lopataruI mostly agree. But for cooking I find cups to be better than the scale. Also Fahrenheit is better since it's more stretched out and 0 F is frozen sea water. 0 c is frozen ??water?? At what atmospheric pressure ...