Features of light catching

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11.12.2011 23:55, Hierophis

Not everyone is a consumer to buy all sorts of garbage, overpaying for it

I can build a simple 300 watt generator that runs on alcohol by the way))), based on a homemade internal combustion engine and any collector engine, I think the weight of this whole thing will be approx. 2kg without fuel, but this is a lot! I don't want to carry this thing with me, also alcohol in addition, but I want something at least within 1 kg and better-less, and at the same time with minimal costs and multifunctional, that is, so that it is also a powerful flashlight, something that will be in demand, and not so much, two I caught it twice and threw it away.

By the way, I looked at the network-you can buy a hot-water engine for about $ 100 or less(although it will always be better if possible, although it is not a fact that it is cheaper), the weight is approx. 300gr. It has a collector motor, a high-voltage compensation stabilizer, a couple of liters of technical alcohol, a little oil-and that's it, the generator is ready, though DC

But all this is still hard, troublesome and so on.

12.12.2011 0:18, Hierophis

"Well, I hate commerce

But I have now, so to speak, studied this topic in Google - it is much easier to buy an alcohol internal combustion engine, and this is the most difficult part of the generator, so read the prices and x-ki.
http://www.capitalhobbies.com/catalogue/111.html
and prices for used cars in Ukraine jump from 100 to 300 UAH.
The rest, as they say, is a matter of technology

, so in theory any "tech guy" will build you such a generator. Moreover, in theory, there is no special quality of current for the operation of a housekeeper or DRL, so if you include only this and do not sharpen it for powering any "fragile" devices, then it is even easier.
But the alcohol you need is concentrated, vodka will not go

Likes: 1

12.12.2011 0:29, Hierophis

Bad Den, in vain-you see black, evil in everything, you need to think about the good ))
I here ksttai one more method remembered-how to get electricity directly from a fire on wood, with a capacity of up to 500 W and a decent voltage, modern technologies work wonders, but I will not say because of your comment ))))
PS
It's a shame, the power of the campfire is average approx. 50 kW and to get out of there for el. purposes something is very difficult in a less glamorous way, excluding of course the good old steam turbine)).. I thought that this ultra-modern medot would cost a lot, at least 1000 rubles. raccoons, and weigh at least 10 kg even with the use of heavy metal lumunium, and copper is better, but even heavier, and this is at a power of approx. 300W in the best case.
So if you do it to power a laptop or phone, then you can, if the DRL is lit, then it's expensive and hard.

This post was edited by Hierophis - 12.12.2011 01: 09

12.12.2011 11:05, mikee

"Well, I hate commerce
But I have now, so to speak, studied this topic in Google - it is much easier to buy an alcohol internal combustion engine, and this is the most difficult part of the generator, so read the prices and x-ki.
http://www.capitalhobbies.com/catalogue/111.html
and prices for used cars in Ukraine jump from 100 to 300 UAH.
The rest, as they say, is a matter of technology, so in theory any "tech guy" will build you such a generator. Moreover, in theory, there is no special quality of current for the operation of a housekeeper or DRL, so if you include only this and do not sharpen it for powering any "fragile" devices, then it is even easier.
But the alcohol you need is concentrated, vodka will not work

That's right, that only in theory

I'm afraid that the interface device of such an engine with an electric motor will be very heavy... At the stated speed of 9000-15000 per minute, the slightest imbalance will instantly cause wild vibration and destruction of the structure. And you can't do with a conventional collector electric motor for the same banal reason that they are not designed for such rotation speeds, you need brushless motors here. In addition, it is not clear what the torque characteristic of an aircraft model engine is, here it will have to turn not a light screw, but something heavier, and the resource of such engines seems to be small... Okay, so I just walked around the top like an amateur...

Likes: 3

12.12.2011 18:19, Hierophis

mikee, I have here next to the collector motor 300W 10K revolutions, at the declared speed of the internal combustion engine, it will just give 200V constants, but there are also synchronous motors, only the current will be variable at the output, and very high-frequency, by the way. Coupling is also very simple - using a flexible shaft (if the call motor) or via a planetary gearbox if synchronous. I collected similar structures, so I speak from experience

The very minimum that is needed is only the internal combustion engine, generator, voltage stabilization(converter, if you really need it). All this will weigh no more than 2kg at a power of approx. 300W. Naturally, there will be no "50 Hz sine wave", but for light bulbs - quite)
The theory here is only one thing-how long will that purchased alcohol engine last, because their operating mode is usually 10-20 minutes of flight, and if it works 4-5 hours, then there are already nuances. So you need to reduce the speed by half(I personally do not believe in what is written there - up to 1.2 hp-this is "Katai watts" on a terrible afterburner probably

), so the real long-term power of those engines is approx. 0.5 hp probably or even less.

But personally, I don't need all this, I have already decided that I will make an "inverted" LED flashlight based on some Chinese case. 50 multidirectional 3V 70mA LEDs on a hemispherical panel, 5 li-ion batteries 3.3 V 1400mA / h-easy, compact and functional, for 2 hours of continuous illumination should be enough, but no more is needed.

Likes: 1

13.12.2011 7:52, americanecz

Not everyone is a consumer to buy all sorts of garbage, overpaying for it
I can build a simple 300 watt generator that runs on alcohol by the way))), based on a homemade internal combustion engine and any collector engine, I think the weight of this whole thing will be approx. 2kg without fuel, but this is a lot! I don't want to carry this thing with me, also alcohol in addition, but I want something at least within 1 kg and better-less, and at the same time with minimal costs and multifunctional, that is, so that it is also a powerful flashlight, something that will be in demand, and not so much, two I caught it twice and threw it away.

By the way, I looked at the network-you can buy a hot-water engine for about $ 100 or less(although it will always be better if possible, although it is not a fact that it is cheaper), the weight is approx. 300gr. It has a collector motor, a high-voltage compensation stabilizer, a couple of liters of technical alcohol, a little oil-and that's it, the generator is ready, though DC

But all this is still hard, troublesome, and so on.

I apologize...
I didn't get it from the message... Do you use the "fruits of your talent" yourself???

Likes: 1

19.12.2011 21:29, metall-mikki

okoem
Thank you for the links,schematics will be useful)
I'm going to connect a germicidal lamp to a battery of this type
http://irs-ua.com/product/np_72
As I learned from this topic, you also need a converter from 12 to 220 volts...
It turns out that the device chain will be like this: battery-converter - ... then, as it were, the lamp provided by the link in the previous message,but still it is necessary to take into account all these gadgets to that lamp...

Have you used germicidal lamps in the field or in populated areas?...it's just that if nothing flew to you in the wild, then I should think about the rationality of fishing for bactericides - I wanted to use them for wild places and no more than 30 watts of power...

Likes: 1

Likes: 2

24.12.2011 21:16, okoem

but apart from the housekeeper, there's no one to hang on to him

You can't pin the housekeeper on him. The voltage isn't right. But if through the converter, then...

Pointless in my opinion: much more practical battery from the uninterruptible power supply carry it with you to get the same results.

Why is it more practical? Where you saw the acc. weighing 5.5 kg, which would give a power of 300 watts?

Do you mean to increase the voltage? Then the power will drop.

Vasily, you are confusing "power" and "current". The power of the generator has nothing to do with the output voltage of the converter connected to it. If this generator has a power of 300 watts, then it will remain so, increase it - do not increase it.
In other words, you can put a 300-watt load on this generator. However, if a converter is used, it is necessary to subtract 20% for losses. Thus, a load of 240 watts can be connected to the converter (and 60 watts will be consumed by the converter itself).

24.12.2011 21:43, Hierophis

The power does not drop when the voltage is increased by inverting, and is determined by the design features of the inverter.
5.5 kg is very heavy nanotechnology

Again, the use of alcohol instead of gasoline makes it three times easier to do everything with more power, proven by aviation, amateur )))

As for the batteries-I am amazed at the conservativeness, which is necessarily lead)), are there any-ion batteries that are very light. The cost is higher, but not catastrophically higher.
For example, 6V 4.5 Ah weighs 1kg and costs about 8ue, 6 pieces of 3.7 V 1500 Mah, which in the end 7.5 V 4.5 Ah, will cost about 40ue, and this happiness will weigh less than 200gr !!!!

I recently experimented with an American-made Omni-smart UPS, nom. power of approx. 600W. It is assembled on the basis of a super-smart inverter with a sinusoid shape close to reality, which is why only an inverter without batteries weighs under 3 kg, since it has an 800W transformer, and a 10 transistor step converter with huge radiators+ a bunch of microcircuits, but it starts without mains voltage(some uninterruptible power supplies cannot).
All this miracle is just HAHA (ie at idle) consumes approx. 6W, and for every 30W of connected power approx. 10W on top. So an uninterruptible power supply is probably a bad idea for portable wear)

24.12.2011 21:48, Hierophis

"Why is it more practical? Where you saw the acc. weighing 5.5 kg, which would give a power of 300 watts?"

So this is easy, with the same ancient lead-acid battery, you can pull out 5 kW! The weight / capacity ratio is another matter. But it is still necessary to calculate the capacity of this nanotechnological generator, and compare it with a li-ion battery.
For lithium-ion batteries, this ratio is less than 5g per watt!

PS
From the parameters on the link, I calculated that the ratio of this microgenerator is about 4.6 g per 1 watt. But this is if we take into account that its weight of 5.5 kg is the weight with a full tank of fuel, and 4 hours of operation is work with rated power, and not idle, then the capacity of this generator is 100Ah or 1200W per hour, and the lithium-ion battery can give 1140W per hour with a weight of 5.5 kg. So it is not much more efficient than lithium-ion batteries.

This post was edited by Hierophis - 12/24/2011 22: 07