Відео

thanks

I use a DC 12V adapter so batteries will work too.

This video will give you a hint => ua-cam.com/video/9kdRJRlyKRg/v-deo.htmlsi=h3eBx0Khl2wMS5Pj

@@SmartServo_org 😀😀😀Это разве нагрузка?... Для того чтобы выработка была приемлемой нужно, чтобы ветряк был огромным. Эта модель ущербна и не стоит вложений..

thanks !

2 m/s is too low to utilize wind energy. maybe get faster wind speed by raising the altitude. This video is used to demonstrate the method of enhancing the Magnus effect. As for Magnus wind turbine, please refer to => ua-cam.com/video/9AdpggaOfF0/v-deo.htmlsi=R7wUJsnYsU_047aB

I've seen your other video, it's very interesting as well. Probably it's better to choose another source than wind, at least here, but in more windy areas, it will probably be a good choice. Is there any difference between this type of vertical turbine, and the horizontal with propellers in terms of how much energy is required to start rotating?

darrieus suffers from poor start ability if small solidity for high efficiency. A good way is to take advantage of both =>ua-cam.com/video/9AdpggaOfF0/v-deo.htmlsi=o0-q8l4j6Mgl9aZS

No documentation found for IMPI MX/a/2023/006829

End plates work well at low speeds, but lift is saturated and drag is high at high speeds. In fact, the end plate can be considered a special case of a blade where the pitch angle is 0 and the solidity is 100%. Increasing the pitch angle as speed increases maintains the best results.

There is a new type of wind turbine blade you may never seen. Search by Geowind.

thank you for your appreciation

Power and speed are not just linear relationships, but cubic relationships

As far as I know, there are many companies interested in wind energy, but they cannot provide a good product to satisfy the market.Vertical axis wind turbines currently on the market are notorious and I try to come up with a new way to change that.

URLs to all project files are listed below the video description. The motor model is DC130

@@SmartServo_org Hello again ! We've been going through the documents filed under the video but we still have some questions left. How did you build the gear reducer (or did you buy it ? what type is it ?) ? How does the tachometer work exactly ? And what is the purpose of the Arduino card, does it only receive information or also control the motors ?

@@EliseVeyrat you can get the gear box on amazon by searching"gear box arduino",To avoid too large a gear ratio to reduce the speed, 20 is a good choice. Since the rotor should rotate in opposite directions on the windward and leeward sides, the Arduino controls the speed and direction of the 3 motors according the azimuth sensor below the main shaft.As can be seen, two semi-circular plates are arranged at 90 degrees apart to divide a plane into 4 quadrants. at power up ,guessing at the center of the quadrant make the error less than +/- 45 degree which is small enough to drive the rotor in the right direction. when the main shaft rotates through the quadrants, the correct azimuth can be found. then count the pulse from the third plate with 40 holes on it to get the real time precise azimuth.

The load should be well regulated to avoid stalling, refer to => ua-cam.com/video/9kdRJRlyKRg/v-deo.htmlsi=BXmTISIRYbHJPcxS

Starting a small Darrieus wind turbine with an electric motor is possible, but not suitable for large windmills => ua-cam.com/video/9AdpggaOfF0/v-deo.htmlsi=b-G_XPWIguWE6TJe

Variable pitch blades can achieve self-starting and are highly efficient. However, the mechanism is complex, heavy, and prone to wear due to high-speed rotation.

But this will reduce efficiency

@@SmartServo_org it will also reduce complexity.

Thank you for your suggestion. Using drag blades is the traditional way to start the Darrieus wind turbine and is no longer worth researching. In fact, there is a price to pay for starting through drag blades, which reduces the efficiency of the lift blades. => ua-cam.com/video/qAYjPSDGPo4/v-deo.htmlsi=k7pk7PRDiFB8X5u7&t=33

@@SmartServo_org the magnus rotors and their abilities were interesting. But, I don't see the necessity for "high torque" just the general capability to self the start. Yes, the radius effects the tip speed, in a given wind. as your video demonstrated and my comments point out, generally in a given wind, a larger diameter drag turbine will rotate slower and that an even smaller diameter turbine will spin faster in the same given wind. I pose that had your video tested an even smaller diameter drag turbine, it's possible to get the whole turbine spinning faster than a purely Darious turbine in the same given wind speed. Lastly, for a little more outside the box thinking, pardon the pun, you could put the drag cross section of the turbine outside the lift cross section.

I can’t remember clearly, it’s about 1KG

I don’t think so, it should be a BLDC motor.

Thank you for continuing to follow my channel. Regarding higher wind speed, I cannot achieve it in my simple wind tunnel. I'm trying to figure out how to move these devices outdoors for testing,

Exhausting air through the blade end can increase the air flow and reduce resistance without affecting other characteristics.

Yes, you are right! Most people only think of it as a wind turbine. In fact, it can be regarded as a wind motor that can produce large torque and only requires a small motor and energy. Torque can be easily increased by extending the struts, without any reduction gearbox.

@@SmartServo_org estoy fabricando uno con tubos de metal, chumaceras y toneles rellenos de poliuretano (o Unicel aún no he decidido cual de los dos) compartiré un vídeo cuando esté listo. Excelente vídeo me sirvió mucho

​@@pedrosolismunoz2688Glad to hear you're implementing this, Here are some reminders that I think are important : Since the rotor must rotate in opposite directions on the windward and leeward sides, the inertia of the rotor should be as small as possible to reduce energy consumption. You can also refer to the project files (including Arduino source code) here => smartservo.org/en/arduino-source-code-for-magnus-vawt/

Thick cardboard, just for experimentation

Loading experiment in progress

@@SmartServo_org very excited to hear about this! Thanks so much for your hard work 🙏

All project files have been released => smartservo.org/en/arduino-source-code-for-magnus-vawt/

@killerwolf7676Why do I ask - I spend quite a lot of time trying to find some tests. THERE IS NO ANY. At least no successful tests on vertical generators. People claim, independent tests, efficiency curves on a paper or in PDF, other blablablabla. But no real non-stop video from really independent "amateurs" where an inverter is connected and this vertical things deliver something reasonable - 100-200-1000W. The maximum I have seen was in order of 10 W from a 1.5-2meters big turbine. As an example ua-cam.com/video/mxSDieRRcz8/v-deo.html There is another video similar to this one, where as fast as load is applied, the turbine slows down and generates less then a bicycle dynamo even at a strong wind..

@@TushhsuT The power generation experiment is in progress. In addition, the Darrieus wind turbine is a lift type and must operate at high speeds to achieve its full potential. If the wind speed and rotational speed are not disclosed in the video, there is no way to know the tip speed ratio TSR, making it impossible to determine whether the turbine is started or not. Many lift windmills actually only rely on drag to operate. Low power is not the point but to be able to clarify what the problem is.

motor? or generator ?

@killerwolf7676 you are right

thanks !

the strip on the cylinder is not necessary => ua-cam.com/video/XmZwYpoKQ8Y/v-deo.htmlsi=R0IujWvqjNI3tsB0&t=22

the strip on the cylinder presents the force for cylinder's rotation, then causes outer turbine rotating. you can compare the rotation speed difference between with and without the strips. and you can test by using the cylinder with very smooth surface such as thin foil

The solidity (nxchord/radius) may be different

yes i think you are right

The information is listed in the description below the newer video => ua-cam.com/video/qAYjPSDGPo4/v-deo.htmlsi=fKFSlM4s-t9VfQa0

Thank you so much sir@@SmartServo_org