Nice build but with one possible flaw: the alternator is being spun counterclockwise. While this is functionally no problem for the alternator, its cooling fan is designed for clockwise operation. Running it backwards severely impairs its cooling ability. You could easily overheat the alternator if it is delivering high current. Something to consider.
@@theblukatlife- It would work but if required to charge a deeply discharged battery, would almost certainly stall such a small motor. The alternator would overload it at high current draw.
Update. Just purchased a GM alternator 400AMP output at 1200 RPM. This is a Alt that has no switch, just start and charge. Doing a 13 HP Harbor freight engine. I like the simplicity of this build but I'll have to go a bit beefier.
I built one out of a gm alternator with a 1hp Dayton motor about 20 years ago. I used it to not only make sure my vehicles would start in the cold. But I had a mobile radio Amp in my house that I powered it with.
Viewed from the rear: Top connectors Left runs through a 12 volt light bulb or 12 volt LED ( through ignition switch) to 12 volts +. Right (through another switch) to 12 + . Big terminal battery to 12 + heavy amperage. Because this alternator genset is loose, you can just clip the connections when needed. The test lamp circuit is only an indicator of proper charge.
looks usefull in an RV also as a starter help or even to help power the household systems (in case the household side of the system has a battery and an inverter...
your car has a little red light on the dash, when alt fails it glows red ? right, so you need a little 12v bulb for the energizing the alternator, when charging it go's off, when not charging it's lit,
Not to this small engine. You would need larger engine. This 63 amp alternator will stallbthis small engine under heavy load. If you had about 10hp or larger you could add 2nd alternator.
Would it work if you used larger 4-stroke engine and set of 4 x 200Amps alternators to directly (no battery - cables directly to the starter motor) "jump start" large diesel engine? There would be a "kill switch" between starter motor and main vehicle's battery. So it would only power starter, without affecting rest of electronics.
No. You will need a battery to energize the alternator to start charging. Four 200 amp alternators will produce 9,600 watts. That is more than most small generators produce. You would need at least a 18HP engine to run the 4 200 amp alternators.
@@imabass77 So if I used battery (4x200A > 12V battery), could I plug it directly to vehicle's system without need of "kill switch" (separation between starter and rest of vehicle)? Would voltage be stable enough to preserve electronics?
@@ryteulopki8069 all alternators should have a built-in controller which limits the max voltage so it shouldnt matter if you use 4 alternators or 100 alternators in parallel, what would be the purpose of the kill switch? wouldnt the starter motor have a solenoid?
No modifications to the alt. I used the cheap $20 on rock auto got 70-80s gm truck. The alt had built-in voltage regulator so it doesn't over charge. The output will increase with rpms.
@@OussamaAbuUmar there isnt a permanent magnet and if the battery isnt connected there will be no back emf, if you want to prove whether I'm talking crap disconnect a car alternator feed to the battery but connect a multimeter to it and then start the car and see what voltage it shows
3.5hp. Its on the small side and can pull too many to bog down the engine. If I try to start the tractor with this hooked up, it will pull more power than the engine can handle and it will stall the engine. This could be mitigated with smaller pully on the engine or larger pully on the alternator. The Alt is rated for 63 amps so that would equate to about 750 watts.
You need 12 volts to energized the magnetic fields of the rotor , if you Noticed in this video , he had his already connected to the battery in the tractor , That energized the rotor to make a magnetic field, if you hooked up directly from the diode block you could get AC power instead of 12 volt DC power which is what a 12 volt battery is . If you didn't understand any of this ? I would not mess with something that could injure or kill you , A.C. power is like the wall receptacle in your house and that is what is coming from the diode block and you could die !
@@jimthomas1989 that’s actually good advice. I actually had no idea that an alternator generated alternating current but I should have guessed as such by the name. I always though direct current was far more dangerous than alternating?
@@originalfallinggirl , After the rotor has been excited it becomes an electro magnet with North and South poles , As the rotor spins North and South alternate creating alternating power or alternating current - A.C. The diode block changes A.C. power into D.C. or Direct Current power . D.C. = direct current flows One Direction A.C. = alternating current flows back and forth both Directions You can get shocked with a spark plug wire of 80,000 volts , it hurts but it won't kill you because there is no Amps behind it .Amps = Amperage But if you touch just 50 volts and it has Amperage behind it you could get electrocuted and die instantly . Alternator - electromagnet Generator - Permanent magnet I have 4 PMAs or Permanent Magnet Alternators that can make up to 1800 watts each , That is enough to run an entire house . They was converted by me and they look exactly like the one in this video . You seen Wind Turbines before . If you are interested , I can give you a name to Google, but you should have someone knowledgeable with electricity . I'm a Arc Welder so I know all about electricity . And I was a mechanic before I was Welding and my Teacher said that you never get to make a second mistake.
