Finally ive finished it and it is FANTASTIC. LIKE,COMMENT AND SUBSCRIBE!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Пікірлер: 106
@sparkywirenut Жыл бұрын
I made one of these 35 years ago , same setup , 1 wire gm alternator , 3 hp Briggs & Stratton engine , went to use it and attempted to pull 30 amps -it killed the motor right there and the whole assembly jumped up a couple inches lol , found out alternators take a lot more than a 3 hp engine to produce any usable amount of current . Took it all apart and scrapped the idea lol 😦
@jayreiter268 Жыл бұрын
You are Correct. The wattage output is converted to horsepower that is increased by an estimate of loss factor. That higher figure is doubled. That figure is the minimum horsepower internal combustion engine required. His experiment proved that. His engine did not have enough excess power for the governor to respond to the step load. This factor has been long known. Edison probably discovered that soon after he learned the governor shafts of his parallel DC generators had to be synchronized.
@NotSoCrazyNinja4 жыл бұрын
I don't think I have ever seen a small engine work so hard in my life. It took it like a champ. Probably wouldn't be a good idea to do too often though lol.
@Bodgemiester3 жыл бұрын
I've since re geared it!
@neverdemagain60434 ай бұрын
I'm doing a 13hp Harbor freight engine with a 400 Amp alternator. I've seen many problems with gearing. I'm doing 3 to 5 on the gear ratio. The Alternator only needs 1200 RPMS to max out amperage. Max Torque on the engine is at 2500 RPMS. 3 to 5 ratio is 1500 RPMS with more added torque.
@Bodgemiester4 ай бұрын
Sounds like you're getting there!
@neverdemagain60434 ай бұрын
@@Bodgemiester Ive actually have been doing calculations since I sent the message. I also found out the posting said 400 Amps at 1200 Rpms. This was car engine Rpms. I have to spin up the alternator to 4800 Roms to achieve the 400 amps. Reading and understand torque is very important before buying the motor. I've also noticed the hit on the motor when connected to the battery. I'm thinking of adding a 3 or 4 Kg flywheel to absorb that initial hit from the alternator. Been looking at Elliptical flywheels. This is not a free energy project. They dont work. There is nothing like it on the net. I should video it. Also, I haven't seen a 400 Amp alternator generator set up on KZfaq.
@danielmeecham4643 жыл бұрын
This is exactly what I needed to see to generate (no pun intended) an idea to fabricate brackets and mount an alternator on my Honda GX160 for my mini power trowel. I'm mounted four mini truck lights and needed to figure out how to generate the power for them. This is it! Thank you!
@Bodgemiester3 жыл бұрын
Excellent news!
@scootersonlyrepair67732 жыл бұрын
Just add charge coils and voltage regulator
@Bodgemiester2 жыл бұрын
Just about to add a slow charge function and an amp gauge. Should be fun!
@marzsit98332 жыл бұрын
i built one of these a few years ago using a honda gx200 6.5hp engine and a delco 10si 120a alternator. i did not use a one-wire unit because i wanted to be able to start the engine with no load and let it warm up a bit before switching on the charging system. it's really hard on an alternator's diodes if you connect/disconnect the battery with the alternator spinning..
@Bodgemiester2 жыл бұрын
Great, I'd love to see a video of it. I have another video with this one soon!
@Nicholas2011ist4 жыл бұрын
How to cook an alternator: Disconnect the load (battery) with the engine running. Engine is too small for the alternator. 85 amps @ 12 volts is 1.02 kw. 1020 watts/746 is 1.37 hp. Single vee-belt transmission efficiency is around 90%, bringing the required power to 1.52 hp. If you add the alternator's 55% efficiency, that brings the power required to drive it to 2.76 hp. Thus the engine is overloaded and bogs down when the alternator loads it down. A 65 amp alternator would be the biggest alternator that engine could realistically handle. Nice videos. Cheers.
@hfraat254 жыл бұрын
Interesting calculation.
@makerog56663 жыл бұрын
Where did you get the 85A requirement?
@han0507 жыл бұрын
that generator gives 100 ampere just in the beginning , thats whay the engine stalled out . when the generator is produsing for full you need a motor on 5 HP to make it work . this is just in the beginning of the charging cyckel , then the powertake out drops very fast down to 70 ampere and thats why youre engine have to work so hard in the beginning and it runs lighter and lighter the more it fills up the battery. i have built one to with a honda clone and i dont recommend you to change the pully on the motor to a bigger one becourse it will get hard to crank over to start up . best wishes from sweden 😊😊
@Bodgemiester7 жыл бұрын
+Håkan Andersson , thanks, I realise that now. Where are you in Sweden. I love Sweden I lived there for 3 years. I just went to jokkmokk on vacation!
@han0507 жыл бұрын
Bodgemiesteri i live about 20 minuts above Karlstad
@Bodgemiester7 жыл бұрын
+Håkan Andersson , I've been to karlstad many times. I've been to every railroad station because I worked for banverket
@han0507 жыл бұрын
Bodgemiester i got friends that work on banverket here , one is called Lars the outher one is called mateus.
@Bodgemiester7 жыл бұрын
+Håkan Andersson , ha small world. Subscribe to my channel and look at the BIG generator I have just made
@scaniawahl4 жыл бұрын
This would be just guessing, but i think the cables can get connected first. That the resistance is not at so low rpm as when starting it😊
@scaniawahl3 жыл бұрын
@Rohan Isaias well that changed the topic😂
@danburch9989 Жыл бұрын
An alternator putting out 14vdc @ 100 amps equates to 1400 watts. 1 hp = 746 watts. Therefore, it will take just over 2 HP engine IN THEORY. But frictional losses generate heat. That takes a minimum 3.5 HP engine at full load. 3.5 x 746 = 2600+ watts. But that's not all to consider in the design. The engine spins at about 3600 RPM. The alternator needs to spin at about 2x that RPM to get full output. Double the size of the engine pulley and add a basttery and youi'll be able to crank a non-starting car engine all day long.
@Bodgemiester Жыл бұрын
Since this I've down geared ot a bit. Works fine
@leopoldpoppenberger86928 ай бұрын
there will be about 4hp drain on the motor coming from the alternator that's why your motor lost speed.
@Bodgemiester8 ай бұрын
It does, usually the peak draw drops after a few seconds and it loads quite nicely
@scootersonlyrepair67732 жыл бұрын
Get a predator 420 with electric start on here . And just for fun put the a motorcycle twist throttle on the dolly then you can have fun revving it up while pushing it around
@Bodgemiester2 жыл бұрын
That is one option, I'll give you that
@scaniawahl4 жыл бұрын
If you are curious about how many RPM’s that engine can manage or till it blows just hook it up on a vehicle with 24v circuit😁😁 what if many places had such generators around, how helpfull they would be up the years. Instead we throwing functionally old lawn movers on garbage
@oby-16076 жыл бұрын
Wow, nice build. Have you considered gearing the pulleys on your apparatus. Maybe the alternator could be running at half speed of the engine giving a 2 to 1 advantage for the engine. Eg. the pulley on the alternator could be 10 cm in diameter and the engine pulley would be 5 cm in diameter. This would reduce stalling. Thanks for sharing.
@Bodgemiester6 жыл бұрын
Thanks for the comment! Yep I’m going to Re-gear it some day (never) it’s not an issue if the battery is not stone dead
@oby-16076 жыл бұрын
Hey, as long as it works.
@davem53334 жыл бұрын
Actually the pulleys sizes should be reversed. An alternator needs to spin at least 5,000 rpm to get decent output. Put the bigger pulley on the engine, smaller on the alternator for overdrive.
@Bodgemiester4 жыл бұрын
Agreed but it is running short of power
@eddiee4603 Жыл бұрын
@Bodgemiester did you ever get it to charge correctly what's your voltage
@geofrancis20014 жыл бұрын
a current limiting resistor would work to stop it stalling, something like a bulb.
@Bodgemiester4 жыл бұрын
Agreed, when you warm up the engine its actually fine
@geofrancis20014 жыл бұрын
@@Bodgemiester I just mean for charging dead batteries, it will let you bring the voltage up from zero without stalling the engine
@Bodgemiester4 жыл бұрын
Yes I totally agree, it’s a great idea
@geofrancis20014 жыл бұрын
@@Bodgemiester how much power you want to charge with is basically equal to the rating of the bulb so put a 120w bulb in series to limit to 10A .
@jamescannon49175 жыл бұрын
I have 212 cc engine that I got at harbour freight I think it will work well. 6 1/2 to 7 hp.
@Bodgemiester5 жыл бұрын
Yes that is actually bigger than mine (lol implied) should work great!
@midixiewrecked70113 жыл бұрын
*Harbor* Freight.
@jamescannon49173 жыл бұрын
@@midixiewrecked7011 yes harbour freight has the predator engines. A lot of ppl modify them an use them on racing go karts
@midixiewrecked70113 жыл бұрын
@@jamescannon4917 Harbor
@spongebobsucks12 Жыл бұрын
@@jamescannon4917 you spelled it like a brit, there's no U in Harbor if you're a yank.
@jeffsewell6786 жыл бұрын
You need to do a few calcs and read up on this stuff. 100A @ 13.8 volts to charge a battery is 13.8x100=1380w, but the alternator is only about 50% efficient, so you need at least 2760w input power, and the alternator will not give full output till its spinning around 8000rpm, the single belt on small pulleys wouldn't be able to drive the 3.7BHP that is needed, that's why it won't give you what you desire. In the car its running at high speed, a step up ratio of 2.5 to 1 is usually used, and the car can do 5000rpm. A polyvee belt is usually used on these applications, they work much better than an Alpha section belt.
@Bodgemiester6 жыл бұрын
+Jeff Sewell , Hi, the alternator is using its original belt pulls. I had worked out the power ratings but I had this engine ‘kicking around’. Geared 1-1 it does the job I need it to you just have to let it get over the inrush. If I re power it I’ll use a 5.5bhp engine. Just a quick toy to put on KZfaq in the end
@immrnoidall6 жыл бұрын
someone needs to give you a pat on the back.it is people like you,that inspire people like me,to get off my but and build something useful and get the cobwebs of of the old internet encrusted brain cells blown out. vary cool idea. i have an OLD lawnmower waiting for an alternator now . thanks.
@Bodgemiester6 жыл бұрын
Ha love it, I’d like to see that video!. Subscribe. I’m posting another video soon
@ranger175a2w3 жыл бұрын
I believe you'll need around a 180 cc (aprox 6hp) engine for that alternator & a 4 inch shive (pulley). Have look at "Knurlgnar" videos. Many Years too late.......
@Bodgemiester3 жыл бұрын
Ha ha, you must've read my mind. Another video on this is coming out in two weeks. I will address this issue that many have pointed out. Thanks for commenting!
@jasongreen83135 жыл бұрын
Go imperial! Lol good vid man
@Bodgemiester5 жыл бұрын
Thanks
@jpfreeman39064 жыл бұрын
You need to use pulleys 2:1 or 3:1(small on engine and big one on alternator)first!! and then put a regulator controller, alternatorman here in YT made one and gives pointers how to make one!!
@Bodgemiester4 жыл бұрын
The alternator is regulated and I have since adjusted the gearing, I actually use another battery as a capacitor and that really helps!
@JesseWright684 жыл бұрын
So what would happen if your battery wasn't flat? Say you just wanted to maintain the battery and subject it to a kilowatt load? Cool Volvo. I wish we would have gotten the 3-series cars here in the US.
@Bodgemiester4 жыл бұрын
Close but no cigar, this is a 400 series (440xi) thanks for the comment
@Bodgemiester4 жыл бұрын
The 300 series was totally different, it was RWD with a transaxle, an excellent car, I grew up in the back of one. The 400 series was built at the same place in Belgium but front wheel drive and nothing like as well built but still a nice drive
@irishammer319 Жыл бұрын
Nice wheels 🤠
@Bodgemiester Жыл бұрын
Long gone but thanks anyway!!!!
@scaniawahl4 жыл бұрын
Cool, i consider to mount a lawn mover engine on my trunk and alternator on inside under. If clearence to rearwindow😊 i think i choose domewhere around 5-7 hp. If i find 2 alternators i might try that since they must share on the load. Convenient i found this video. I was wondering how it would be jump starting a car like that. Alternator, water pump and power steering pump take a lot of hp from the engine. In my youth i was taking a drift on kickdown while entering an empty road. The fan belt snapped and suddenly it speeded up and i was going backwards in a inferno of tyresmoke. So now i consider suxilary engine to drive the alternator, coolant etc. 😊And worst case scenario if battery is flat is to pull the rope. But maybe i should replaced my starter engine first. 3 years ago i should. Its just that a BMW designer. Must be the worst car ever to replace a starter. If i meet that designer............
@Bodgemiester3 жыл бұрын
ha ha ha, it sounds like you have bigger issues
@TheMajictech Жыл бұрын
A newer hairpin style denso alternator takes less torque to turn, has 12 diodes, should outlast a few generations and puts out over 2x the amperage than that old delco junk.
@Bodgemiester Жыл бұрын
Probably so, but I had this and its sill alive and well 😂
@ggesdsdsdsd5 жыл бұрын
damn you should of used at least a 4 hp engine.
@DEVONLAD113 жыл бұрын
i'm struggling with a 6hp diesel never mind a 2.2hp
@Bodgemiester3 жыл бұрын
try altering the drive ratio
@philliphall5198 Жыл бұрын
A 5 hp engine is best GM says it takes at least 3 hp to run alt if I remember correctly
@Bodgemiester Жыл бұрын
I agree, I had this engine laying around though 😂
@stickynoob35873 жыл бұрын
Can I make one of these with an old VW dynamo?
@Bodgemiester3 жыл бұрын
No reason why not, go for it!
@theejoeylee4 жыл бұрын
That tiny ground is the bottle neck, and the only reason its running at all with a load and a 1:1. Its going to overheat when you get the right ratio. no way ot can carry 100 amps! car audio people are cringing.
@Bodgemiester4 жыл бұрын
No it won’t do 100a continuously but it will in rush it no problem, the real issue is the ratio, it’s now 2:1 and works fine
@richardreleford1703 Жыл бұрын
It was struggling just trying to charge your battery. It won't provide enough current voltage to run your vehicle Sir. Rethink your idea/project.
@Bodgemiester Жыл бұрын
Runs fine after inrush. Use it tonnes
@saarendran95186 жыл бұрын
Mine is 5hp Can this power up home air conditioner
@Bodgemiester6 жыл бұрын
5hp will generate enough power but you need AC at either 120@60Hz or 240@50Hz. This unit is 12v DC
@saarendran95186 жыл бұрын
Bodgemiester Thanks
@saarendran95186 жыл бұрын
Bodgemiester what type of inverter need to power up AC
@Bodgemiester6 жыл бұрын
No problem! Please subscribe
@Bodgemiester6 жыл бұрын
Don’t bother, they are very inefficient, just use an AC alternator instead
@MrGodskingАй бұрын
great idea how much to make one for me
@BodgemiesterАй бұрын
@@MrGodsking no can do, sorry
@azentioced92 жыл бұрын
ha you can damage the altonator with it not being connected to the battery? not good
@Bodgemiester2 жыл бұрын
On a modern one yes, if you do it for a long time but a few seconds won't hurt.
@jamescannon49175 жыл бұрын
What are the measurement on the altinator brackets
@Bodgemiester5 жыл бұрын
I’m not sure, I only ‘eyeballed’ them. Nothing to fancy
@MothKeeper4 жыл бұрын
12v 85 amp... It's really not loading it up much 😂😂😂 👍
@Bodgemiester4 жыл бұрын
Your not kidding!
@LU8HRW3 жыл бұрын
@@Bodgemiester 85 amps is a good load. Congratulations
@Bodgemiester3 жыл бұрын
@@LU8HRW video on current limiting in the new year! Subscribe