Building a Wind Power Plant with an Alternator: Managing Battery Charging and Excitation

Hello,

I know that we have excited and non-excited alternators. So such non-built-in generators are practically generators without a voltage regulator.

Excited require a small current to start charging.

I want to build a wind power plant with an alternator (easy, small maintenance) but I come to some considerations.

When the battery is charged, what to do to prevent the alternator from charging and burning anything?
When the battery only does the excitation current, what to do not to discharge it and then have something to excite the alternator?

I thought about experimenting...

A windmill, an alternator, a battery, a small lighting installation (without professional knowledge) that will illuminate the surroundings of the house at night on a motion and dusk sensor.

Then I thought about experimenting with 12v or other heaters that would support central heating or heat water. And here the problem came to my mind ... since the alternator requires current from the battery for excitation, how to connect it (or bypass it) so as not to discharge the battery to zero?

Alternatively, how to make the alternator charge the battery for excitation (e.g. small, motorcycle) but take the current for heating CO only from the operation of the alternator?

Another thing is how to put cables in such a home power plant from the alternator? Is there any ready-made device that transmits electricity to such installations? Do you have to make such a 'miracle' yourself?

Gentlemen, any ideas?

The alternator will not overcharge the battery and certainly not in the "wind" mode, that's why it has a voltage regulator.

The excitation can be done on the basis of a rotational speed counter, which will consume several dozen mA (and may stand still for days) instead of a few W and will turn on the excitation only after reaching "x" revolutions.

There were 666 topics and 999 solutions.

The solution with the alternator ... sorry, it is suitable for an allotment garden and not for everyday use, too little power. You'll do it like a donkey and you'll find that you can recharge your laptop, because it won't be enough for anything else. The nominal power of the alternator is a poor indicator of what you will achieve here (subtract some 70% ;p). It will be only 150W if it's windy. Dude's ass .

I also thought about the construction of the 'American' but here you have to do everything from scratch and there is also the issue of the voltage regulator and the like. Some people still want to calculate it but without deeper explanations (and not everyone wants to explain their theories) most of the 'patterns' or theories are unlikely to be performed without proper training :P

So the alternator doesn't seem like such a bad solution.

You need at least 900-1200 revolutions on the alternator shaft, the transmission is another loss, because the "propeller" will definitely not have such revolutions. Well ... but by increasing the revs you reduce the torque ... meatball. When the load is turned on, the machine will start to rear up

If you wind a 120w per coil alternator with 0.8 wire (org is 60 with 1.3 wire) a 45A Bosch alternator, it will charge from about 400 turns.

But the rotor must have neodymium magnets and you need to make an external regulator.

Kwazor wrote:

If you wind a 120w per coil alternator with 0.8 wire (org is 60 with 1.3 wire) a 45A Bosch alternator, it will charge from about 400 turns.

But the rotor must have neodymium magnets and you need to make an external regulator.

So no difference compared to the American woman he shuns
In one season The Colony made "energy" out of an alternator, a windmill the size of a helicopter propeller, and a gear ... chain : it worked in light winds, but the size and noise ... (burning the wood they used to make the steam locomotive move) :D

That's more or less what it looks like

I have a piece of plot with my family, so sizes are not a problem. The plot would work :)

Back to the case.

Alternator eg star 200. Each alternator has 3 outputs.

For battery, ground and charging.
So probably + - and mass or something like that ... but I could be wrong.

How much does it need to wake up? How to avoid battery discharge in such a situation?

Is it possible to connect it so that the battery is charged from the alternator and is only for excitation, and all further power goes, for example, to lighting and a second battery or heaters or all at once?

A question from another series.
I have an old washing machine at home. Big, heavy, very hard to spin... and probably burnt (to be rewound).
Can you refer me to some material in a nutshell how to rewind it and how to make it american?

I know, there are a lot of topics on the alectroda but reading 463 pages of posts where 85% are questions is a big waste of time. Of course, I read it once a long time ago but maybe there are some places where I can find all in one?

-- rewind the washing machine motor
- create a voltage regulator (or buy)
- create propellers, structure, mast...everything

Apparently, I need to consider each point and read up on the subject again.

Regards

wic1 wrote:

The plot would work

Attach a propeller to the dynamo... and charge your smartphone ;)

You still have to read a lot, a lot, a lot, a lot, a lot.

wic1 wrote:

Is it possible to connect it so that the battery is charged from the alternator and is only for excitation, and all further power goes, for example, to lighting and a second battery or heaters or all at once?

You let go through the diode to the battery and you have it, you connect the battery heater to the alternator and it will not charge you.

What diode?

wic1 wrote:

What diode?

You take the rectifier from the alternator to the battery and straight from the alternator and the battery will be charged through the diode, it will not let go the other way.

For starters, I suggest a generator from a washing machine engine - cheap, the best solution.
https://www.elektroda.pl/rtvforum/topic1932704-3420.html#14372317
Winding is necessary and neodymium on the rotor. - Anyone can do it as soon as they read the topic.

101pawel wrote:

how far are you from building a windmill? It's about the mast, and what's on that mast.

Hello,
At the moment I am "in the woods" because I work in the city and return to the subject during holidays. I considered the issue of the alternator because it simply does not require too much work. The only thing that worries me is the low power with high wind demand.

At the moment I am considering a construction resembling an Attic Turbine, but larger and flatter. Something like a flattened vertical turbine.
My parents' house is relatively tall and I was thinking about a chimney structure. The only thing that worries me is possible vibrations and behavior in strong winds (which would not break the chimney).

Initial plan:
Windmill / blades etc (if I can do it myself).
Alternator + gear from bicycle sprockets and chain.
Battery
Some kind of measuring element checking 'power'.
Motion sensor lighting under 12v (lights, sensors, wiring)
Possibly an inverter to have a spare for the laptop.

Design in a nutshell...do it yourself with minimal electrical knowledge.

As for the generator from the washing machine engine, I'm all for ... but I have no idea.
I spread out on the issue of 'rewinding' such and then on the connection, the construction of the voltage regulator and the charging regulator for something like this.
In addition, there is the issue of the brake design and on the alternator, it probably does not make sense because I will never reach 100% anyway

wic1 wrote:

Possibly an inverter to have a spare for a laptop.

Rather, a car-type power supply ... but it's also an "inverter". But the question? Isn't it better to have a solar installation? It's simpler, reliable, always works ...

Hi
I see you're thinking like I was at first. Now, looking back, I find that it didn't make sense.
I wasted my time and money.
Consider, making a wind turbine is not so simple. Starting with the rotor blades, each suitable profile is all balanced. Then the generator. If you want to do it, but don't be surprised that you will spend money on crap and the effect will be meager.
I bought a 300W turbine for 220EUR.
Read my posts and you will see what hits I had
Regards

kasperek21 wrote:

Hi
I bought a 300W turbine for 220EUR.
Read my posts and you will see what hits I had
Regards

Hello,
I just saw a 600W turbine somewhere on amazon for about $50-100. I thought about giving it a try to start with. It's small and you can combine it with propellers

Hi
Dear Colleagues, do not buy cheap.
My 300W Chinese wind turbine got Parkinson's. He's crawling with the whole mast despite the guy wires.
I advise proven companies. Knock on wood, the inverter is still alive.
Another Chinese is warming up like stupid. I hid it in an air-conditioned cabinet of my idea.
I recommend solar energy. Less hassle and more electricity.
Regards

I have a self-made generator from a 1.5KW 720 rpm engine, original winding and nothing is spinning or heating up. The 2.5 m diameter propeller can reach almost the rated speed of the generator and power up to 2 kW. I use the voltage from the generator first to charge the batteries with impulse chargers, and then to heat the water in the boiler, I have the pwm controller set so that the batteries are the priority and when they are charged the voltage increases and the pwm on Attiny is switched on, smoothly turning on the 1500W heater load.
The windmill, by comparison, has no chance with PV panels when it comes to the amount of energy produced, but there are days when I have to stop it because I have too much energy and the boiler has boiling water and a full battery. Regards, Edward.

Edzio, where can I see your beauty? Put up some photo. How tall is the mast?
Where I live, I can't afford anything big. I think I'll download this Chinese and tighten it or break it.

Generator, generator from alternator - After we have to throw away the brush-holder, slides and electromagnet from the rotor, we get the same as the stator from the induction motor from the washing machine.
The stator from the washing machine is on average 4 times larger, more useful - it has a larger diameter for the rotor, a larger capacity for copper in the grooves.
We still have an almost ready rotor in a full-time casing - just roll a few millimeters in diameter.
In the stator we have a three-phase winding that is suitable for use - Practically, how many revolutions is and so many volts - it generates on the neodymium rotor.
Three-phase rectifier from the alternator or buy two single-phase ones for PLN 3 and bridge the pluses and minuses.
If you need more power, replace the 0.4 mm washing machine wire with a wire with a diameter of about 1 mm and spin faster - 1 rpm = 60 rpm and we have at least 12 V to charge the battery - up to 20 A on the mast .
12 V x 20 A = 240 W - for this, a turbine with a diameter of 1 m on the axis (without gears) from hand materials on a mast over 2.5 m high is enough.
Good luck.

Three photos of my windmill, and I live near Częstochowa.

Hi
Are these blades self-made?
When I return to Poland for good, I will put about 5 kW.
I even like your windmill, only I would make the tail more fanciful.
Regards

The shovels were bought, but they are almost professionally made, and the tail is different, my wife likes it

What was the cost of the whole business?

Hello!
What about the neighbors?
How far do they live from your windmill?
Regards, C.K

As far as I'm concerned, the neighbors don't complain. I can't hear anything in the house. Although in the neighborhood you can hear him screwing up )

When the wind blows, there is more noise from the wind than from the propeller and generator. I once had an American and a wooden propeller that whistled at high speed and the generator howled and I had to get rid of it. This fan runs quietly. And I have a neighbor who says very little, sometimes pretends not to see me in the square, and casually raises his hand in my honor.

Edek, the neighbor raises his hand casually, because he lacks the strength for your inventions
My first savonius was moaning like crazy.
A neighbor suggested to me that there must be something wrong.
It's important to break the bottle with your neighbor from time to time

It's impossible with him, he's a complete abstainer, he doesn't drink, he doesn't smoke, and it's not the fault of my inventions that he's like this, because I didn't have a fan and it was even worse. But I have to say one more thing, when I tell him that I pay PLN 70-80 for energy in the summer (and he pays PLN 150-180 for a month) for two months, I have hot water every day, and I don't burn in the stove to wash myself in the evening, well that's a bit moves him. But for now, he won't be persuaded to buy collectors or panels, he prefers to smoke in the furnace and smoke my atmosphere. And I have a self-made collector and photovoltaic panels, including one set on a tracker and a windmill. And everything works from sun and wind. He smokes me before evening so I can and should be pissed too. But in general it's not bad, you have to live well with your neighbor (and your neighbor) because you don't know who can ask for help when.