Wow, thank you! I've been SEARCHING for this exact schematic for a while now. I've seen this circuit before and it's not too difficult to analyze. You can simulate it yourself using LTspice (from Linear Technologies). I couldn't quite remember it, but it's coming back now. I saw in a book called "Alternator Secrets" (more like a pamphlet) showing how this circuit works so that you can change the voltage to 120 volts to power your home. This video is GOLD!

Is amazing lesson

A good explanation of the internals of an alternator is very hard to find. Lots of how-to's. Thank you very much for the explanation. I have been looking for a book that explains the detailed theory of how an alternator works but haven't found one. Would you happen to have any recommendations? I am a retired electronic tech.

3:00 Good point! Without the regulator cutting down the voltage to the rotor's field coil, the alternator's stator windings could produce up to 200v, which could burn out your vehicle's electrical devices.

Thank you!! Been hunting for some proper illustration/explanation of how the voltage regulator works on an internally regulated alternator. I have a 1987 Honda CRX, and any diagrams I could find about the regulator simply had a box labeled 'Regulator' and no further description of how it works. Only other aspect that's still a mystery is the 'C' Terminal it has labeled. any description just says 'computer control' but no further explanation on the protocol used to control it (PWM, variable voltage, variable ground?) I suspect that ground brings it to low mode (12.8v) and float (left open) brings it to high mode (14.4v). Did find out, that pulling it high is a bad idea (cause that broke my regulator and had to replace it)

I always love a good textbook😎

Your videos are great...just rebuilt an old 3 wire gm...👍

Excellent. My congratulations ❤.

Very good! I would like to know how (in the second diagram) the lamp gets its mass when alternator is not functioning; is that throught the regulator or via another path? Are the R1 (D1) R4 low resistances so that a current through the lamp exists?

I think the other way around, the T2 will turn off the T1 when the voltage at zener diode is high enough to turn on the T2 based on the voltage of the divider R2 & R3. The voltage at R1 is pulled to ground and that turns off the T1to cut the voltage in the field rotor coil.

This is for an old-school type regulator, but not too old. The PCM he mentions is for a modern car. The previous era used "relays". This is a "solid state" design: NO moving parts. To understand this circuit, look at the zener diode on the base of TR2. Now look at the collector of TR2. If the voltage on the zener cathode gets too high, TR2 starts conducing more, robbing the TR1 base of current. This causes the TR1 collector current to drop, lessening the field current thus lowering the battery voltage. A balance is struck and this maintains itself at any speed.

thanks for your workk buddy.

excellent video bro.thanq🌹🌹🌹

Wow, thank you!

Hello good video!!, can you give me the name of the book that you are using in your video, please, thanks

Thanks. Very nice video. In my car there are 2 wires attached to battery positive and 2 to battery negative. What are these wires?

great . tnx

Thank thank thank you The clear description in the internet what i locking for Dear can we get this book in pdf

Where can I get that text book ?

Big thanks

Oi joe ...can I hookup the ad244 sence wire straight to the coil with the diode ,instead of battery light

I appreciate the teaching skills you hv and How can I get the book .....??

I like this video How can I find that text or book that you use for the explanations?

Good day Joe, Where can I buy one of those text books which you use to make your videos?

Thank you for this video. I would like to know the title and the author of this book, please.thank s a lot

Nice charging system manual. Where can I purchase one.

Can I build a 250 amp Alternator for a Smart Fortwo Alternator?

Thank you

is the output voltage different based on model of cars or different alternators ? as you said other video that we are going to get 14 V output from the alternator to the battery. what dose it mean if the alternator dose supply more than 14 v or less? thank you

I don't understand if you said the computer replace the regulator. Because the regulator has diodes ; resistors ; transistors ; mosfet and capicitator ; and a coputer has the same components and both controlling the voltage ; ore does the computer control more voltage because it had more components with small components as well

thank you sure can you tell us the name of the book

Thank you sir, please what's the name of book and the author

hi, i'm from vietnam i'm very interested in this generator circuit, can i ask what car this generator diagram is on?

The rectifier, how does current flow through the bottom three diodes? What’s the path through those three if it is blocked one way?

How do i connect D+ on a -77 mopar? I thougt i should connect the old cable to the old extern voltage regulator. At first i thought i succed, the car charged 14,7 V at idle but when i tried to turn of the car it refused. i took off the connections to the batteri but that didnt help. But when i disconneted the cable to the old extern voltage regulator that now where connected to D+ the engine stopped. I tryed to run without the D+ connected, it worked but it dident charge So whats going on here? how to wire this correct?

Sir what is the difference between voltage of trio diode and main voltage from rectifier

If I have a 10SI GM alternator 100 amp and when you start the car it's putting out 14.5 volts and as soon as the electric fan kicks on the voltage drops to 12.9 volts ... Then if you turn the car off and then restart the car with no fan running or anything else drawing power but the voltage still stays at 12.9. what could be causing the voltage not to go back to 14.5??

Shorted diodes must go separated with resistors

I would like to get some information on that book you are using as I would like to purchase one

what book you use ? its avail in the pdf in net? what the name?

does anyone know where I can get a alternator schematic for a 2014 Nissan Quest?

Is possible to get this book title

I have seriuse headashe from all that staff. You see some cars work great on alternator back charge but baterry dies ither way discharges or over charges and I love plasma and amplifier ignition systems. Now be me is the problem I want dual system baterry and capacitor bank. Only problem for exampel if that capacitor dies expecialy on tractor alternators in Europ dead baterry,in other ocasion I used hv ceramic capacitors I ended up changeing me alternator starting charge rpm from 1k rpm some where up to 3-4k rpm so I need higher engine rpm to charge me baterry. So me question is how to make simpel system that does work variabel voltage regulator that is not effected from capacitors? And how to prevent baterry to interact with capacitors? Im lookeing at dual systems that do not share + or - conrctions. Basicaly for long time I want to coppy the magneto system with alternator and basicaly it does work if alternator starts to back charge for some reason if no diode is present in dashboard or arceing dual relays do know cause havoc with alternators. So sir how to prevent such unusual problem? Some alternators are even rotation dependent here in Europ if you for exampel use wrong turning direction alternator he also will not charge baterry. So does that book have any usefull information for dual baterry systems ? Its just idea but wuld normal current cutt out relay work for baterry and simply put inline capacitor banks as constant charge for other devices? Basicaly all I need the baterry for is for starter motor evry thing ells I need to be some thing ells for running different engine effects seperstly and programabel. So how is that achived if you want to prevent centrain effects to acure betwean 2 circuets who share common + or common - conection??? Thats what mostly confuse me. How ever I look at that voltage regulator it looks nearly identical to gm ignition modules or dual 5 pin relays so thats why me curiosety gets bether of me so I wonder if that alternator culd be made manuali variabel for centrain loads and aplications. So what me interests is what frequency range those regulators operate at and how to modifi cotectly resistors and capacitor values for centrain starting charge rpm ranges. Those seriuse questions schools do not teach properly in me opinion. So I hoppe you know some thing usefull that might explain those odd behaviors . In short Im lookeing for programabel alternators who can charge 2 systems seperatly and if posibel charge rpm starting charge ranges and if posibel to swap series/parrarel configuration switches for helpeing engine to start more easely. Suposedly there existed wacum tube baterry chargers and desulfation methodes baterrys be useing coils from high current dv motors but no one is realy specific hownthat works and why they took 1 full baterry and 1 dead baterry and used the dc motor coil polarity difference to transfare force current to dead baterry to desulfate it . Those S/R terminal starter selenoids confuse me as well no one realy talks about great things only basic crap . So me question is did some one actualy ever repaired that shity circuets because they fail and are anoying honestly . Me Delco 12si europ version alternator does lot more strange staff who are not mentioned so Im confused like hell about it . What I want simply programabel out put that alternator ignores baterry voltage and just push current constantly until the baterry is full. Because on plasma ignition ignition coil + and ground gound on those 2 ends from ceramic capacitors creating short basicaly. And me confusion is how to hell control that effect??? How to meshure some thing like voltage if baterry goes of scale and no current present???. So thats the problem here to understand . How to have multipel devices work seperatly or circuets in 1 and the same mashine ? For exampel magnetic brake,magneto,alternator ,series/parrarel conection switching,baterry/capacitor chargeing switching ,how to not get shocked if 2 frequencys are present in different potentials and other usefull information. Your video is great but wuld be even more bether if those mentioned problems wuld have some solution . Those mentioned effects destroy engines and cause rost in cars for years . So I cinde try to figure out how to get ride of it or bether how to control those effects. Those are valid questions who rarely some one asks but I have those problems . And aperantly profesors cant realy help me so hoppe you know some device that can properly modifi alternators and control them manuali with bether industri type parts .

can i get the hand book you're using please?

Could you put this manual as pdf in comment

Great video, thank you very much. What is the title of your book ? Thanks a lot 🙏

can i please have the name of the test book

Hello, where is the capacitor after rectifier diode locate?

name of your book you are using

Show how an Alternator can drain a battery .

Try to give a feedback

hello sir what is the name of this book

around 6:30 when you talk about the duty cycle of the field. you say that 50% duty cycle would result in producing 50% of the alternators rated output. I believe this is incorrect as you didnt account for the rpm of the alternator effecting the alternators maximum power output. max power cannot normally be obtained at low rpms.

Where we can get all those books😢.

Watched 02 : 29 15 / 10 /2022 Thanks

120 degrees out not 90 degrees Joe

what is the name of the text book you are using

Where is part 1 2 and3

2:43, 90 degrees? Bro it's 120 degrees. This is star or WYE configuration

Book name?

Book name

You need to take a course on electronics,as your explanations are way out. For instance a capacitor doesnt stop AC from the rectifier diodes & 3 phase stator, has no 90 degree output to name a few mistakes.