The craftsman made a vertical wind generator from the G700.04.01 tractor generator with his own hands to charge his batteries by supplying it with a single-bladed propeller.
Characteristics of the G700.04.01 generator:
Rated voltage - 14V.
Rated current - 50A.
Rated speed - 5000 rpm.
The maximum speed is 6000 rpm.
Weight - 5.4 kg.
The tractor generator is a high-speed unit, it is given a charge for the battery at more than 1000 rpm, so it is not suitable without conversion to a windmill. In order for the generator to be able to charge the battery at low speeds, it had to be modified.
The master rewound the stator - 80 turns for each coil, using 0.8 mm wire. The author rewound the excitation coil of the electromagnet and increased it by 250 turns using the same wire. He additionally used 200 meters of wire to rewind the stator and wind the coil.
Then the craftsman welded a mount for the generator, using a corrugated pipe, made protection from strong winds. It is made in the form of a folding shank, which is put on the kingpin.
Choosing a screw, the author decided first of all to create a design with two blades, the screw diameter is 1360 mm. For the blades, an aluminum pipe with a cross section of 110 mm was used, which were rolled out. The length of each of them is 630 mm.
The master installed the wind generator on a 5-meter mast. He dropped the slip ring idea and ran the generator wire inside the mast tube.
Stretch cables were used to fix the mast at a height of 4 m.
The wind generator starts charging the battery if the wind speed reaches 3.5 m/s.
4 m/s - 300 rpm.
7 m / s - 900 rpm, the generator provides about 150 watts.
15 m / s - the rotation speed of the screw reaches 1500 rpm, the wind generator produces about 250 watts. These parameters are sufficient to charge the car battery.
To improve his installation, the author increases the speed - he converts a two-bladed propeller into a propeller with a single blade.
The single-bladed propeller has the advantage of high wind energy utilization. For the same wind speed, a single-bladed propeller rotates twice as fast as a three-bladed propeller.
However, for the manufacture of a single-blade propeller, it is necessary to carry out a difficult operation - its balancing. Otherwise, due to strong vibrations, the generator bearing will collapse, fail prematurely.
The place of fixation of such a screw is a tube on which a counterweight is provided. The work of the design is based on the principle of the rocker arm.
The author welded the mount for the blade beam onto the generator pulley, drilled a hole in the beam for the M6 stud. In the mount, he inserted two limiters in the form of studs so that the screw did not touch the mast.
The author tested the design and got decent results. If the propeller is properly balanced, the generator shaft rotates much faster. As a result, the generator produces more electricity, even if the wind is weak.
This wind generator is made on the basis of the G-700 generator from a tractor. The alternator propeller has a two-blade design, which in the kit allows you to develop high speeds even in light winds. The average power that the generator produces is 150 watts, it is already achieved with a wind of 6 m / s. The article discusses the main points of modernization and design features of the wind generator of this model.
Materials and parts required for the construction of a windmill of this type:
1) tractor generator G-700
2) wire 0.8 mm thick about 200 meters.
3) profile pipe
4) dural tube 110 mm
5) M10 bolts
Let us consider in more detail the design of the windmill and its main components.
The main part of the windmill is a generator, which in this case was converted from a standard G-700 tractor generator. The G-700 tractor generator has the following characteristics: rated voltage is 14 V, rated current is 50 A, the generator weighs 5.4 kg without a pulley, and also has a resource of 10,000 hours.
The only snag to use this generator without alterations was too high operating speed from 5000 to 6000 rpm. Therefore, for starters, the author took up the modernization of the generator.
The generator stator was completely rewound with a wire 0.8 mm thick with 80 turns. This was done in order to raise the voltage at the revs. So the excitation coil of electromagnets has undergone processing. 250 turns were wound on the coil with the same wire that was used for the stator. Taking into account the complete rewinding of the stator and winding the coil, the author spent about 200 meters of wire for such an upgrade.
Then the author proceeded to create a mount for this generator. The fastening structure was made of a shaped pipe in such a way that the drive passed inside and twisted vertically. Also, the design of the windmill provided protection from strong winds. In order to reduce the load, protection was organized by means of "folding the tail", for this a kingpin was welded, on which the tail of the wind generator will subsequently be put on.
Since the generator still requires sufficiently high revolutions for high-quality work, the design of the propeller was chosen as two-bladed. The screw itself turned out to be about 136 cm in diameter, and a duralumin pipe with a diameter of 110 mm became the material for its creation. Both propeller blades were cut out of this pipe. The length of each blade turned out to be 63 cm. In order to reduce the twist and make the blades flatter, the author rolled them out. As a result, it turned out as if the blades were made of a pipe with a diameter of 400 mm.
Photos of the finished windmill:
Due to the fact that the used generator has no sticking, the screw starts even from the lightest wind and develops high speeds. The length of the wind generator mast is 5 meters. The height is also added by the pipe of the generator itself.
Fastening takes place in three places through M10 bolts. To keep the mast of the wind turbine in a vertical position, it was fixed with braces. the wire from the wind generator goes inside the pipe, so it is reliably protected from external conditions. In the design, the author did not use slip rings.
Charging the battery begins already with a wind of 3.5 m / s, and at a speed of 4 m / s, the wind generator propeller accelerates to 300 rpm, at 7 m / s the speed reaches 800-900, when the wind is 15 m / s, then the propeller revs up to 1500 rpm.
The maximum power of the generator, which was recorded by the author, was 250 watts. With a standard wind of 6 m / s, the wind generator produces 150 watts of energy every hour. This power is enough to charge a car battery.
As a generator for this windmill was used
Author: Yuri Kolesnik
Due to the lack of uninterrupted power supply, many owners of private and country houses are increasingly thinking about how to organize uninterrupted, autonomous power supply or, in extreme cases, backup power supply using renewable energy sources such as wind and sun.
You can make a wind generator yourself, as well as typical mistakes in its manufacture.
We will consider what the simplest, cheapest and instantly payback wind generator can be made by yourself.
With what we now have at hand or can easily be without much investment.Definitely from the heart of our wind turbine, generator and only from it.
Far from everyone can make a generator on their own and rewind the finished one. They send photos of rewound generators and with the addition of magnets on the rotor. No one can squeeze more than 200 watts. It would be nice if this business was without spending money and time. It is also a scrupulous business, long and far from simple.
Forces are not enough, but the result is not sufficient.
This is a conventional tractor generator. Why exactly him? So where do you start then?
The topic of this material is to clearly show how to make a wind generator easier.
Not everyone can assemble a neodymium magnet generator? And in the villages the tractor is the most,
whatever is running. Yes, and it will not have sticking, which is characteristic of a generator on neodymium magnets,
and this, as you understand, is very, very good.
And what is no less important, many craftsmen have already made wind turbines based on it.
The situation is such that about a hundred letters have accumulated asking for clarification on how to
a decent wind generator without a gearbox and without a home-made generator with neodymium magnets,
to quickly pay off, and besides PRODUCED IN ONE DAY!!!
The efficiency of the tractor valve type does not reach 0.8, but it will be more than 0.7.
Of course, it is necessary to clarify not all tractors, namely those that can work without
battery in the excitation winding circuit. Such generators already contain in their design
magnets direct current and after a simple refinement, such a generator is quite suitable for
use in the simplest wind generator without a gearbox or multiplier.
EXACTLY THIS EDUCATION IS DESCRIBED IN THIS MANUAL.
PAY ATTENTION TO TESTING - at the same speed, the power doublesAnd right now you can get instructions with which you can within 10 minutes
make a ready-made generator for a simple wind generator from an ordinary tractor generator.Since I have already bought and untied the material, I can report that there is a real improvement and with any paddle mechanism it should be noted that the generator power has shifted from 350 rpm to 250 rpm. And this is very important. even at 4 m/s, such a generator will be able to produce up to 500 watts per hour, which makes it the most attractive in the price-quality range.
Specifications for this generator.
Rated voltage, 14 V
Rated current 50A
Generator weight without pulley 5.4 kg
Rated speed 5000 rpm
Maximum rotational speed 6000 rpm
Direction of rotation on the drive side right
Generator resource, 10,000 moto/hours
But in this form, the generator was not quite suitable as a generator for a windmill, since it was designed for high speeds, and it was modernized. The generator stator was rewound with a 0.8 mm wire of 80 turns in order to increase the voltage at the same speed. The excitation coil of electromagnets was wound with the same wire, 250 turns were wound. In general, it took about 200 meters of wire, taking into account the complete rewinding of the stator and winding the coil.
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The generator mount and base are welded from a profile pipe. The design is made so that the drive passes inside the pipe and hangs vertically into it. The design itself involves protecting the windhead from strong winds by folding the tail, for which a kingpin is welded. The tail of the wind generator will then be put on this king pin.
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This is what a finished wind generator looks like. The propeller of the windmill is two-bladed, this is due to the need for high speed for the generator. Screw diameter 1.36m, made of duralumin tube with a diameter of 110mm. Two blades 63 cm long were cut out of it, then rolled out to reduce the twist and make them flatter, the twist turned out as if they were cut out of the 400th pipe.
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Since the generator does not have sticking, the propeller starts from any breeze and develops high speeds. In the photo, the wind generator is raised to a mast 5 meters high, plus the pipe of the wind generator itself. The wind generator is screwed to the mast through this pipe in three places with M10 bolts. Also, in order to somehow hold the mast, it was fixed on stretch marks. The wire from the wind generator runs in the pipe, slip rings were not used.
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Charging starts at 3.5 m / s, with a wind speed of 4 m / s, the wind turbine propeller develops 300 rpm. At 700 rpm, the speed reaches 800-900 rpm, and with a wind of 15 m/s, the propeller accelerates to 1500 rpm. The maximum power that was recorded was 250 watts, with a wind of 6 m / s, the wind generator produces about 150 watts. This is how simple and easy wind generators are made from available spare parts and materials. Of course, the power in this option is not great, but it is just right for charging a car battery or several.
The experiments and improvements in the design of the wind generator did not end there. A new single-bladed propeller was made for him, continued below at the link to the new article ..,
