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The post explains a simple vertical axis wind turbine generator circuit using ready made high power generator dynamo and a vertical axis wind turbine mechanism. The idea was requested by Mr. Taibani.




The Request

Hello Swagatam,
Bro hope youre doing well.
Firstly thanks for all the great knowledge & information you have given here its really appreciated.
I am trying to do a project of home made low RPM VAWT generator which can generate enough power to run one small scale factory I need your help on winding section.
1) Correct copper winding design for low rpm.
2) Correct copper wire gauge.
3) Number of turns of winding.
4) What core material should be used for low drag ( Lenz effect ).
Please help me out & your readers with your great knowledge.

Thanks & Regards,
Taibani Imran.

The Design

Designing a VAWT motor is not easy and might require good expertise in the field and at the moment for me this looks much complex and I have little idea regarding the same.

However for any layman the idea could be easily implemented through a ready made generator as described below:

Below is an example of a 10,000 watt dynamo which could be used for the proposed vertical axis wind turbine generator application





Instead of winding a vertical axis wind generator yourself, a simpler idea would be to configure the VAWT mechanism with a high watt generator or a dynamo through a correctly calculated gear or pulley/belt  ratio.

For example, the above shown 10 kv dynamo has a specifications of generating 10000 watt at around 3600 RPM, which implies that if the a pulley ratio of 1:100 is configured, the dynamo would be able to produce the rated amount of power with the VAWT rotating at just around 36 RPM, which could be achieved perhaps even at wind speeds as low as 5km per hour.

The following diagram shows a rough set up design for the above explained implementation:


The figure above shows a simple vertical axis wind turbine model, the vertical helical turbine is designed to capture wind flow on one half of its span while allow free flow on the other half, causing the propeller to initiate a rotational movement with high torque.

Being vertical in its positioning the VAWT does not rely on wind directions unlike the traditional horizontal axis wind turbines. This advantage makes the VAWT sustain its operations under all wind conditions regardless of its direction of flow.

The central vertical axis of the turbine can be seen attached with a gigantic flywheel, which is supposed to be a lot bigger than the wheel attached with the generator shaft.

The bigger the ratio, the bigger would be the conversion even at minimal wind speeds.

With a ratio of 1:100, the generator could be expected to be generating at its full capacity and specification, with the VAWT moving at a meager 50 RPM or even less. This speed could be in turn achieved at wind speeds not exceeding 5 to 10 miles per hour.

Controlling VAWT speed using Shunt Regulator Circuit

The above explained set up is for facilitating efficient conversions at low wind speeds, but what happens when the wind is rapid or during stormy conditions.

If this situation is not taken care of can easy rip-of the generator winding and burn it within no time.

In order to control the VAWT speed at dangerous wind speeds, the following shunt regulator circuit could be used with the output of the generator for achieving a constant speed on the generator and the VAWT.



In the above figure the generator output is applied to a high current triac shunt regulator network through a 50 amp bridge rectifier module.

The value of the zener diode determines the control threshold, which is shown as 220V in the diagram. It means under no circumstances the voltage from the generator can exceed the 220V mark, and if it does the excess power is simply shunted or shorted to ground via the triac.

This ensures a controlled rotation of the generator even at formidable wind speeds keeping the entire system stabilized and safe.

If the generator used is a  3 phase type of generator, the shunt regulator shown above could be replaced with a 3 phase shunt regulator using SCRs.

If you have any doubts regarding the discussed vertical axis wind turbine generator circuit, do feel free to express them through comments

A term MEG refers to motionless electromagnetic generator circuit which is designed to generate electrical energy without using any moving components or involving any kind of mechanical stages.


The device is made solely through a strategic placement and interaction of permanent magnets, coils and a ferromagnetic core. The specialty of this device as claimed by the inventors and researchers lies in its potential to generate an output power much higher than the induced input triggering power.



A MEG device comprises of a couple of winding sections wherein the first input and the output inductors operate along the regions of the first magnetic path, while the second input and output inductors operate along regions of the second magnetic path.

To execute the above function, the input coils are alternately agitated through an external pulsating DC, so that the back EMF from the input coils are able to induce an identical pulsating current over the secondary coils at a specified magnitude and rate.

This magnitude of output power as measured by the inventors show outstanding enhancement by a factor of COP 3.  

COP is the abbreviation for coefficient of performance, and a COP 3 overunity means an output power thats 3 time more than the input power..... its like getting 3 watts from an input power of only 1 watt.

 If we examine the proposed MEG device we realize that its actually not violating any law of thermodynamics. The secret behind the increase in the COP value is due to the smart application of the coils and the permanent magnets, and their interaction with the central ferromagnetic core.

In one of my earlier posts we discussed about the parallel path magnetic device and learned how a small electrical pulse applied externally to its coils is able to channelize the power of the permanent magnets towards the relevant edges of the device generating immense magnetic force over those ends, and this immense concentrated magnetic force was as high as 4 times more than the capability of the input power.

The proposed motionless electromagnetic generator circuit exploits the same principle, by mobilizing the dormant stored power of the permanent magnets for generating electrical energy much higher than the applied input triggering pulses.

Basic Coil and Magnet Layout Set up for a MEG device

 

 

The figure above shows the basic layout or set up of the coils, magnets and the core. The green colored section indicates the ferromagnetic core, which are in the form of 2 C-cores joined edge to edge, like this [ ]. The violet colored items are the collector coils wound over plastic bobbins, these coils react with accumulated, concentrated pulsating magnetic fields and convert them into COP3 electrical energy or COP 3 overunity output.

The white sections indicate the smaller trigger coils which accept the pulsating DC input from an external power supply source.

The central red, blue blocks refer to the magnets which should be preferably neodymium types.

In the image the upper drawing shows the side view of the device while the lower diagram presents the top view of the ME Generator.

The coils indicated in white are required to be pulsated alternately at some specified frequency which could be according to the core specification.

For laminated iron C-cores, the frequency could be anywhere between 50 and 200Hz, this might need some experimentation for figuring out the optimal or the most beneficial outcome, in terms of the COP value.

The following circuit diagram can be effectively used for powering the primary coils, as stated in the above paragraph.

 Core Specifications:

The core used for the MEG can be crucial, the details are furnished in the following image:

Inventors:	Patrick Stephen L; Bearden Thomas E.; Hayes James C.; Moore Kenneth D.; Kenny James L.
Appl. No.:	656313
Filed:	September 6, 2000