Neg2LED
Flashlight Enthusiast
- DELETED -
DELETED. became a festiva for arguments.
DELETED. became a festiva for arguments.
- DELETED -
- Thread starter Neg2LED
- Start date
Help Support Candle Power Flashlight Forum
- Status
BatteryCharger
Flashlight Enthusiast
Re: mini generator
Cool!! I would love to see pics of that...
Cool!! I would love to see pics of that...
Neg2LED
Flashlight Enthusiast
Re: mini generator
i'd love to post them, but dad wont let me..... oh, and by the way, i have to spin the motor damn fast, and then put it through a voltage doubler to get 13 volts
neg
i'd love to post them, but dad wont let me..... oh, and by the way, i have to spin the motor damn fast, and then put it through a voltage doubler to get 13 volts
neg
Neg2LED
Flashlight Enthusiast
Re: mini generator
it uses this engine:
to adjust the speed my dad told me the circ's pretty much a Engine Speed Controller with tach feedback and a circuit that monitors the battery voltage. when the batt gets to a certain voltage, about 11v, seeing as SLAs/LAs keep their voltage up till the end, the circ then plays with the feedback voltage to the ESC. its rigged so all the time then ESC thinks its meant to be going half speed, so when the engine is meant to speed up, the tach voltage goes down, and vice versa. neat, huh?
neg
it uses this engine:
to adjust the speed my dad told me the circ's pretty much a Engine Speed Controller with tach feedback and a circuit that monitors the battery voltage. when the batt gets to a certain voltage, about 11v, seeing as SLAs/LAs keep their voltage up till the end, the circ then plays with the feedback voltage to the ESC. its rigged so all the time then ESC thinks its meant to be going half speed, so when the engine is meant to speed up, the tach voltage goes down, and vice versa. neat, huh?
neg
Re: mini generator
I picked up a rc car magazine and man, they had mini motors putting out 3-5hp for those little cars. Then they had brushless motors and many other things that I had no idea existed.
What I want is a way to use my free natural gas from my stove without doing any plumbing. I tried making a thermal electric generator, but it made like a watt. I had hoped for a bit more.
I picked up a rc car magazine and man, they had mini motors putting out 3-5hp for those little cars. Then they had brushless motors and many other things that I had no idea existed.
What I want is a way to use my free natural gas from my stove without doing any plumbing. I tried making a thermal electric generator, but it made like a watt. I had hoped for a bit more.
Neg2LED
Flashlight Enthusiast
Re: mini generator
make a nat gas flame heat up water to turn it in to steam for a steam turbine. whoops, gotta fill up da tank on my gen...... /ubbthreads/images/graemlins/smile.gif ok im good for another hour /ubbthreads/images/graemlins/smile.gif
yeah, 1-5 hp is normal. but i've seen 4-cylinder 25hp ones used for 1/3 scale boeing 747 models. two to a plane. 50hp. cool huh? they make a HUGE racket though, and they guzzle fuel like nobody's business. something like 1 litre (1/2 gallon?) for a 30min flight.
im thinking about making a bigger mini-gen to charge my elec scooter. probably about the same output, but with a 5 litre fuel can with a little fitting at the bottom for the tank, so it can run for 20 hours on full burn. might be bad for de engine, probably run at med though, not full. either that or a nice large fan.
meh
neg
make a nat gas flame heat up water to turn it in to steam for a steam turbine. whoops, gotta fill up da tank on my gen...... /ubbthreads/images/graemlins/smile.gif ok im good for another hour /ubbthreads/images/graemlins/smile.gif
yeah, 1-5 hp is normal. but i've seen 4-cylinder 25hp ones used for 1/3 scale boeing 747 models. two to a plane. 50hp. cool huh? they make a HUGE racket though, and they guzzle fuel like nobody's business. something like 1 litre (1/2 gallon?) for a 30min flight.
im thinking about making a bigger mini-gen to charge my elec scooter. probably about the same output, but with a 5 litre fuel can with a little fitting at the bottom for the tank, so it can run for 20 hours on full burn. might be bad for de engine, probably run at med though, not full. either that or a nice large fan.
meh
neg
Jack_Crow
Enlightened
Re: mini generator
NLED,
Greetings to Oz from Iraq.
I know your photo options are limited, but tell me more about the engine your using on this project. Is it something from a 'weed wacker' or more along the like of a lawn mower engine.
Also how loud is this thing in operation.
If you found a quiet DC generator, light weight item, it might be thing for camping trips and some military options.
Later dude
Jack Crow in Iraq
NLED,
Greetings to Oz from Iraq.
I know your photo options are limited, but tell me more about the engine your using on this project. Is it something from a 'weed wacker' or more along the like of a lawn mower engine.
Also how loud is this thing in operation.
If you found a quiet DC generator, light weight item, it might be thing for camping trips and some military options.
Later dude
Jack Crow in Iraq
Big_Ed
Flashlight Enthusiast
Re: mini generator
That sounds like a really cool project....nice! /ubbthreads/images/graemlins/happy14.gif
That sounds like a really cool project....nice! /ubbthreads/images/graemlins/happy14.gif
Neg2LED
Flashlight Enthusiast
Re: mini generator
its a model car 1.5hp engine and a 12v motor. makes very little power. the motor isnt very efficient at being a generator! it runs at something like 12000rpm....
neg
its a model car 1.5hp engine and a 12v motor. makes very little power. the motor isnt very efficient at being a generator! it runs at something like 12000rpm....
neg
Neg2LED
Flashlight Enthusiast
Re: mini generator
whoops i forgot it's fairly loud - more of a whine though, not a hum, so it's annoying!
neg
whoops i forgot it's fairly loud - more of a whine though, not a hum, so it's annoying!
neg
turbodog
Flashaholic
Re: mini generator
[ QUOTE ]
Neg2LED said:
its a model car 1.5hp engine and a 12v motor. makes very little power. the motor isnt very efficient at being a generator! it runs at something like 12000rpm....
neg
[/ QUOTE ]
If it really put out 1.5 hp, then the 12v output would be close to 100 amps. The electric motor you're driving, is it timed at 0 degrees? If not, you'd get a good bit more power out by using a modified motor and timing it to 0.
[ QUOTE ]
Neg2LED said:
its a model car 1.5hp engine and a 12v motor. makes very little power. the motor isnt very efficient at being a generator! it runs at something like 12000rpm....
neg
[/ QUOTE ]
If it really put out 1.5 hp, then the 12v output would be close to 100 amps. The electric motor you're driving, is it timed at 0 degrees? If not, you'd get a good bit more power out by using a modified motor and timing it to 0.
BatteryCharger
Flashlight Enthusiast
Re: mini generator
[ QUOTE ]
turbodog said:
[ QUOTE ]
Neg2LED said:
its a model car 1.5hp engine and a 12v motor. makes very little power. the motor isnt very efficient at being a generator! it runs at something like 12000rpm....
neg
[/ QUOTE ]
If it really put out 1.5 hp, then the 12v output would be close to 100 amps. The electric motor you're driving, is it timed at 0 degrees? If not, you'd get a good bit more power out by using a modified motor and timing it to 0.
[/ QUOTE ]
It would only be 93 amps if it was 100% efficient, which is impossible. Commercial diesel generators would be lucky to get 70%. I would be shocked if this could get 30%.
[ QUOTE ]
turbodog said:
[ QUOTE ]
Neg2LED said:
its a model car 1.5hp engine and a 12v motor. makes very little power. the motor isnt very efficient at being a generator! it runs at something like 12000rpm....
neg
[/ QUOTE ]
If it really put out 1.5 hp, then the 12v output would be close to 100 amps. The electric motor you're driving, is it timed at 0 degrees? If not, you'd get a good bit more power out by using a modified motor and timing it to 0.
[/ QUOTE ]
It would only be 93 amps if it was 100% efficient, which is impossible. Commercial diesel generators would be lucky to get 70%. I would be shocked if this could get 30%.
gadget_lover
Flashaholic
Re: mini generator
By the phrase "timed at 0 degrees" do you mean that one pole of the generator should be approaching a coil as the motor hits TDC?
Daniel
By the phrase "timed at 0 degrees" do you mean that one pole of the generator should be approaching a coil as the motor hits TDC?
Daniel
Neg2LED
Flashlight Enthusiast
Re: mini generator
i dont know about timing - i just whipped it together. it puts out about 12a at 7v, then i double the voltage/halve the current, and i end up with about 5a.....
its a cheapo 7-12v motor!
yeesh
neg
i dont know about timing - i just whipped it together. it puts out about 12a at 7v, then i double the voltage/halve the current, and i end up with about 5a.....
its a cheapo 7-12v motor!
yeesh
neg
Re: mini generator
too bad those little engines are nasty oil blowing 2 strokes.noisy too.
a tiny quiet 4 stroke burning alcohol would be nice.
i have a tiny tiger for emergencies but its a noisy,smelly smoke maker.
still comes in handy.
the one you built might also find service as a tiny jump starter/battery charger to stash in the car.
too bad those little engines are nasty oil blowing 2 strokes.noisy too.
a tiny quiet 4 stroke burning alcohol would be nice.
i have a tiny tiger for emergencies but its a noisy,smelly smoke maker.
still comes in handy.
the one you built might also find service as a tiny jump starter/battery charger to stash in the car.
Neg2LED
Flashlight Enthusiast
Re: mini generator
hmmm... i've been running it on plain old gasoline!
neg
hmmm... i've been running it on plain old gasoline!
neg
Re: mini generator
maybe you are lucky?
those run on a nitromethane/castor oil mix.
when running they emit a lot of oil mist.messy.
i bet it wonr run much longer without oil.
[ QUOTE ]
Neg2LED said:
hmmm... i've been running it on plain old gasoline!
neg
[/ QUOTE ]
maybe you are lucky?
those run on a nitromethane/castor oil mix.
when running they emit a lot of oil mist.messy.
i bet it wonr run much longer without oil.
[ QUOTE ]
Neg2LED said:
hmmm... i've been running it on plain old gasoline!
neg
[/ QUOTE ]
Re: mini generator
The mag I was reading said they use nitro fuel. They use a glow plug like thing too. I think some of the higher end were 4 cycle engines. I believe they are suppose to run rich andmost folks lean them up so they sound better and they get too hot and lock up.
The mag I was reading said they use nitro fuel. They use a glow plug like thing too. I think some of the higher end were 4 cycle engines. I believe they are suppose to run rich andmost folks lean them up so they sound better and they get too hot and lock up.
BatteryCharger
Flashlight Enthusiast
Re: mini generator
[ QUOTE ]
snakebite said:
maybe you are lucky?
those run on a nitromethane/castor oil mix.
when running they emit a lot of oil mist.messy.
i bet it wonr run much longer without oil.
[ QUOTE ]
Neg2LED said:
hmmm... i've been running it on plain old gasoline!
neg
[/ QUOTE ]
[/ QUOTE ]
You have to define "those". Yes, many model engines run on different fuel and oil mixes, but not every one of them. Some run on nitromethane, some run on diesel, some run on methanol, some run on a gas/oil mix, some run on straight gasoline. Obviously he has one of the latter.
[ QUOTE ]
snakebite said:
maybe you are lucky?
those run on a nitromethane/castor oil mix.
when running they emit a lot of oil mist.messy.
i bet it wonr run much longer without oil.
[ QUOTE ]
Neg2LED said:
hmmm... i've been running it on plain old gasoline!
neg
[/ QUOTE ]
[/ QUOTE ]
You have to define "those". Yes, many model engines run on different fuel and oil mixes, but not every one of them. Some run on nitromethane, some run on diesel, some run on methanol, some run on a gas/oil mix, some run on straight gasoline. Obviously he has one of the latter.
- Status
