9hp OHV engine and Permanent Magnet Alternator

[mpmrla]

Nice professionsl looking setup. I made something similar to safely rechargre my marine battery since standard chargers are so unregulated they just damage good batteries. I used a 1hp ac motor and a regulated 45 amp vehicle alternator i purchased used for $5. After the motor is up to speed i excite the field coil for 1 second with a push button switch from the battery being charged and off she goes with regulated 14.7vdc

[intheshitter]

Why is the alternator putting out so much voltage? Shouldn't it be around 14v? Interesting setup.

[AlternativePowerMan]

Any chance we could see a load test video? Can it power some good load? The engine should be able to do up to 4500 watts. Nice setup. Check out my homemade generator.

[luca20yo]

im new to this who process. i thought the pma kept going if cranked . then why need a moter to move the pma?

[stuckinwawa]

@luca20yo the pma needs to turn to send energy to the batteries, most people use the pma hooked up to a wind mill, I made this set up to charge my bank of batteries at my camp, sometime I don't see wind for weeks and I need to charge my batteries, this setup charges my batteries way faster than using a battery charger hooked up to a generator.

[luca20yo]

@stuckinwawa im trying to make some magnets to charge one first i got to get the magnets working then ill be trying it was well.

[goose2goose2]

but how many amps? volts don't mean much...how much current?

[markfothebeast]

I'm not familiar with how much load an alternator creates when putting out power. I'd like to see multiple alternator's hooked up to a that 9HP engine. It would be interesting if that 9-HP engine could run enough alternators to keep several batteries in an electric car charged while it's in motion.

[MrMaleBee]

Is it safe to run a computer on?

do you need something to be plugged in before you plug in a computer?

Thanks

[cujafish]

hi, i`m curious how much amperage you can pull,(or wattage)

wattage = volts x amps

and can you hook another alternator and pulley up

thanx

[AlternativePowerMan]

Nice video. What made you decide to use a PMA instead of a regular alternator? Check out my videos, an old 7HP and a 150amp alternator with tons of power to run invertor and charge batteries and the engine has capacity to spare.

[GOAMember]

You should have a large diode in the positive lead to the battery to prevent the battery from trying to turn the alternator into a motor. Some diode of the stud mount type rated for 50-75v and 50 amps. Mount it on a aluminum finned heat sink and bolt it somewhere to the frame. The diode should eliminate the 'starting load'.

[prentis45]

Why not just use a $39.99 dollar adapter that plugs into the generator and hooks to the batteries?

[MrLagros]

Nice video! Thanks for sharing. I just built a homemade battery charger my self. Check out my video for my battery charger and other solar/wind projects.

[ballyquillanboy]

i did the same with my lawnmower, works great, Used a 3HP Briggs & Stratten with an altinator of a ford cart. Just goes to show that unique ideas are few and far between. All the same well done.

[helloman1976]

How many watts per hour does it generate and how much fuel does it use to do so? It's too bad you couldn't use a diesel engine (assuming this one is gasoline) which is perfect for running wide open throttle and generating the torque required to turn the generator not to mention the superior gas efficiency.

[Iseekoutthetruth]

why don't you convert your gasoline motor over to hydrogen? make it run off a HHO generator.

[helloman1976]

@Iseekoutthetruth Hydrogen is really cool and very Earth friendly but the amount of energy stored in gasoline/diesel compared to hydrogen is drasically different and it's not efficient nor cost effective. Better would be a very small turbo diesel engine.

[Dorisequador]

sweet altinator pulling that much volts  impressive..

[JustinJJHCS1]

you can get a Cheap Centrifuge Clutch at Princess Auto where you got the Engine.

It is in the Back with the Pullys and what not....

[wind4watts]

Nice Job! simple manual clutch method but works great, have used the same idea myself in the past, good-huge engine maybe you could use 2 pma's?. I am making a smaller 12v generator myself only 15-30A for renewable battery banks boat etc.

[MrJetjoe]

get a d/c moter and go green

[GRATZIANI2002]

looks very nice....but dude, to spend 9 hp (6.3 kw) to obtain 1 kw is quite american way...do not forget that an belt u have there hardly can transfer 2 kw...moreover , the radius of motorpulley is limited also.....

[ihelk]

where else could you buy an alternator like that one besides ebay?

[Trim1]

Have you considered a GEET Pantone?

[mcskifter]

While it is nice not to have a battery to maintain on your standby generator, this thing is totally unregulated. Simply swap it out for a 'self-starting' alternator instead, and you get regulated output, with no need for a manual slip-belt-clutch. You will still be able to hand start.

The trick to self-starting alts is that the rotor is permanently magnetized (weak field) so it will generate a little power when first turned, this power is used to firts energize the field coil.

[jeffmolly1]

what pma are you using?

[josmeijer]

If you really want it to be even close to energy-effective and/or battery friendly, you might consider placing a (solar) regulator with a 3-step curve in series.

Youĺl find links on the site of PMC guys or by googeling.

Better ones can even give a soft-start to save the belt and avoid starting problems.

[adamalden]

cool

[Cthrilla]

that's all pretty cool. Good job on being clever and resourceful.

[stuckinwawa]

I'm not an expert by all means, but I can tell you from trying different things, there is no way a 2 hp can charge my batteries, picture 7 heavy equipment batteries tied in parallel. I know they are not designed for this purpose but they were free. They're for hard cranking and not like a deep cycle battery.

[stuckinwawa]

I first tried my 2 hp ohv engine hooked up directly to the shaft (love Joy connection) no pulleys just straight shaft to shaft, you know what happened when I tried to hook it to a simple car battery, nothing, that's right. I couldn't get the motor started, so I disconnected the booster cables and then got the motor running, when I tried to hook back the booster cables the engine didn't stall but it was very close,

[stuckinwawa]

so i got two batteries tied in parallel and tried again, this time the motor stalled, so I decided right there I needed more power. I purchased a 9 hp only because I got it brand new for 250 bucks, I probably would of went smaller but the price was right. So I hook this motor up to the PMA same way as the 2hp, shaft to shaft, this time I used my deep cycle boat battery, it was reading 11.9 v at the time.

[stuckinwawa]

3 seconds later it was 14.3 volts and I had to shut it down fast! It was just too fast! That is when I decided to go with the pulley system. If you look at my other video you'll see I used a 3.5 hp lawnmower engine, ya it worked but what a piece of shit. This setup has been just awesome, I've had it at camp for 5 months and it works flawlessly, nice and quiet and smooth.

[stuckinwawa]

I guess I could of hooked up a switch to turn the PMA on and off but I didn't, actually I don't need to loosen off the belt with this motor, it starts up with no problems at all. My old set up yes, I definitely needed a way to ease in the belt, for my new set up it's not a problem, I thought it was gonna be but it isn't. I run my 27 inch tv, sattelite receiver and a couple lights at 10 watts for about 5 hours using my batteries,

[stuckinwawa]

in turn all I have to do is run my set up for one hour, thats pretty fricken good if you ask me.

[pivotboy63]

"nice and quiet and smooth" thats what she said! lol im sorry i have a bad habit

[1REDDAWN13]

@stuckinwawa Question? why do you want to use a special Alt . A generator will charge up batteries just find. I know a generator normally gives you a plugs not wire connections. Take a normal gen take apart get wire connections out,same thing right.

[goose2goose2]

@1REDDAWN13 you need to study more about alts and gens....big difference!

[1REDDAWN13]

@goose2goose2 ....sorry you didn't get the sarcasm.....it was weak but there. My thought was if you have all the parts, batteries and the time; sure make the home made gen. Add up all the parts price, how much more to get a brand new gen.

[scanzew]

hi...i just read this alternator on ebay can produce power up to 16KW...can this tiny alternator generate such amount of power??still very confusing

[Phantasmansghost409]

@stuckinwawa Hello: I think you could get around the problem of having to tighten the belt. I would think to use remote stater relay to engage your charging system after the the engine is started. You could use a two stage set up so the batts can top charge then deep charge on the second. I have worked with electronics and automotive equip so have good resorces of info.

[terautekohi]

Wears down the Belt faster. But Good idea. Agree with fragmat, but im assuming the amount of torgue it takes to run current threw the Batts, An sudden heavy load may stop the motor

[rcdieselrc]

The extra cost is wasted fuel. It stalls because the system is not designed correctly. The typical answer is to over power everything. Why not do it correctly? Video will be posted when ready. I'm about to start cutting metal.

[rcdieselrc]

If that is the case, it is due to the PMA's poor efficiency. It's a simple equation of mechanical power in and electrical power out. The trick like I said is matching the two components to operate near peak.

I'm working on a small generator, 700W electrical output or so and expect to need only 770-800W at the engine crank to get the job done.

[rcdieselrc]

You need to optimize your engine size. 9 HP is 6.7kW and charging 12V batteries you should get ~340 amps output. The engine is way too large and you probably only need 1-2 HP.

If you are getting 55A that's about 760W into the battery. Even if the electrical system was 50% efficient only 2HP would be needed. The trick is matching the generator to the engine output torque and power.

What you have works fine but is not so efficient.

[stuckinwawa]

I tried a 2 hp motor, every time I hooked it up to my batteries it stalled the motor, it might be ok to charge one battery but try 7 at one time.

[rcdieselrc]

That's because you didn't match the speed of the generator to the load. If you are generating 40V it's going to try to draw far too much current. The current load requires torque and due to the mismatch the smaller engine stalls. You probably only need 14-15V to charge your battery bank at 55A. To get a good match you would need to have the engine's torque curve.

[defjampop]

wow. that's realy powerful. I saw that the dodge ram is OHV. nice video.

[ingesumadre]

resarch the geet !

[TNman21]

just put an on/off switch on one of the alternator wires so theres no load when you start it

[pixar5]

how many ampares is the pma putting out ? we know how many volts .

[stuckinwawa]

To be honest I don't know how to test for amperage, all I have is multimeter to test. The place I bought the PMA from shows a chart and I know I'm putting out around 1200 rpm to 1300, so the chart shows 50 to 55 amp at that speed.

[bill99959]

Just use a solar panel so you dont have to buy 10,000 gallons of gas!...LOL

[stuckinwawa]

I have solar panels and a wind generator, the engine is just one more way to help. I spend weeks at a time at camp and the batteries are being used faster than I can charge them. Usually by the end of the second week I run the engine, maybe 10 bucks worth of gas is all I use.