Questions tagged [windturbine]

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Electric Turbine Generator using Fan Motor

I need to build a turbine with permanent magnets using a table fan motor, I've come across many tutorials but none of them describes well all the physics on it, it would be appreciated if anyone has ...
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1 answer
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How to use inverse function of Cp vs Lambda of wind turbine in MATLAB script

I want to use inverse function. I know the value of Cp and I need to calculate Lamda and Beta through this formula. How can I do? I think it has to do with a lookup table of Cp vs Lambda for DFIG Wind ...
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Linearization of a set of equations of a system is linearized about multiple points, or should it be a single point?

Linearization of a set of equations of a system is linearized about multiple points, or should it be a single point? I have 10 wind turbine generators in a system. Every generator has three ...
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1 vote
1 answer
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3-phase star transformer connection with no neutral for wind turbine

I built a wind turbine a while back and have been using it to power lights in my house. It gives out 3-phase in star setup with no neutral. Neutral is buried in epoxy resin in the casting. It feeds ...
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Charging a 12vdc lead-acid battery bank with two different power sources (solar & wind)

Looking to upgrade an existing solar system with two (2) 285W panels going through a 40A MPPT solar charger. The solar charger is charging 4 6v lead-acid deep cycle batteries. ((Cell 1 + Cell 2) || (...
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1 answer
206 views

What DC motor specs for wind turbine science project?

I am trying to build a model wind turbine to power an LED for a science project. The motors we have don't seem to work well. I'd like to turn a turbine with a hair blow drier and have that light up an ...
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1 vote
1 answer
90 views

Power a servo momentarily using a capacitor for geocaching

I'm trying to build a cache for geocaching based on a movie - The Boy Who Harnessed the Wind Those who don't know what geocaching is, please visit here. It is a fun activity. I have this idea for a ...
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1 answer
32 views

Generator Charger Grounding

A while back I sketched up a small charge control circuit that can be used with either a wind or solar generator scenario. This is only meant for smaller 12V 10-30W /hobbyist/home made generators and ...
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2 answers
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Vaneless ion wind generator: isn’t the maximum output theoretically limited?

I was thinking more specifically about the Dutch model of the kind EWICON : https://en.m.wikipedia.org/wiki/Vaneless_ion_wind_generator Here is what puzzles me: If the wind is strong enough to carry ...
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Power coefficient Cp of wind turbines

The power coefficient of wind turbine (ratio between useful mechanical power and the total wind power) varies when the tip-speed ratio varies. I know also that we tend to keep constant the power ...
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3 votes
1 answer
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How can wind turbine be used to frequency control in a grid?

I was listening to an interview (sorry don't have the source) from the Mexican's minister of energy, where he mentioned 'Wind turbines are useful even when the wind is not blowing because they can be ...
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29 votes
6 answers
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Do power plants supply their own electricity?

I tried looking it up but there's no answer for this. This is mainly concerning nuclear power plants or natural gas plants, where they would have other buildings attached on site to operate the plants....
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Wind Turbines - Tip Speed Ratio

The tip speed ratio is given by TSR = w.R/v where w = rotational speed of the turbine, R = radius and v = wind speed. Now the speed of the tip is a function of the energy extracted from the wind, but ...
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1 vote
0 answers
102 views

How can I efficiently convert the output voltage of a 3 phase generator of 700V to 12V, 24V or 48V DC?

I recently bought a wind turbine electric brushless generator rated for 3kW. I noticed that the output voltage is really high - it is around 700V at 5400 RPM. After some research on stackexchange, I ...
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Which form between solar panel and wind turbines requires less cost in servicing?

I found that the average life of a solar panel is about 25 years and that of the the wind turbine is also somewhat close to 25 years. But the wind turbines require alternator in order to generate ...
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3 votes
2 answers
103 views

Wind-powered fairy lights + battery charger: preliminary help

I'm new here and asking for help designing a yard-art project. I would like to use a small DC motor as a wind-powered generator to charge a battery (with overcharge prevention) and run some battery ...
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-6 votes
2 answers
421 views

Using solar power to create steam to spin turbine

Please read this question again now I have amended a glitch. The idea it to use a small solar panel to generate electricity, which will be sent to an element (or other device) which will heat up water ...
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1 vote
0 answers
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Currents injected in the grid, connecting a wind turbine

I'm studying the connection to the grid of a wind turbine through a three-phase inverter. Now I understand that , in normal operating conditions, in the connection to the grid, the reference for id ...
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2 answers
125 views

How are physically obtained different rated voltage output -12/24/48 V- for a PMSG driven by a very small wind turbine rotor?

In some very small wind turbines (less than 1kW) specifications it is reported that the alternator is of threephase AC permanent magnet synchronous type and that the rated voltage could be 12V/24V/48V....
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1 answer
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Circuit for stabilizing the mini - 3 phase wind turbine output to 5 Volt using 7805 IC

I am trying to get some stable output from a Brushless power generator/motor/turbine which i purchased from Aliexpress Mini Micro Small 3 Phase Turbine To check if it works i tried to rotate it and ...
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1 vote
4 answers
897 views

Torque of motor vs operation as generator

While trying to work out which motor to use for a wind turbine project, I'm coming across torque numbers for DC motors. I'm mainly looking at a BLDC motor right now. Clearly, for a smallish turbine ...
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0 votes
2 answers
251 views

Unstable DC voltage ~ 300v to regulated 120V conversion

I need your advice for transforming DC voltage which is coming directly from many bridge rectifiers connected the pluses and minuses (from custom made multi phase wind alternator). At the bridges ...
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0 votes
2 answers
646 views

Homemade dynamo and alternator

I'm a curious person that knows only basic physics, and I want to craft a homemade power generator (eolic, magnetic or hydroelectric, the origin of the energy doesn't matter yet). I would like to ...
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8 votes
3 answers
17k views

Wind turbine generator: brushed or brushless DC motor?

I am trying to use a DC motor as a generator for a wind turbine but then there are two possibilities for the DC motor which are brushed and brushless. Which one is more efficient to use? I know that ...
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6 votes
2 answers
1k views

How does a wind farm prevent the fastest spinning turbine from driving the slowest one?

Just what the title says. On a wind farm spread across several score hectares, I assume, the wind-speed wouldn't be uniform. The faster spinning turbines would probably induce more electricity than ...
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9 votes
3 answers
1k views

Harvesting energy from a small amount of wind

I am currently investigating the feasibility of a project that would include the need of harvesting some energy from wind. The size constant of the generator and fans is about 2"x2"x2". The end goal ...
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