June, 2014 - Purpose of this Instructable
This Instructable is designed to explain the processes involved in building and testing a rotor to get the maximum output from a modified F&P motor..
It starts by showing a different way to wire an F&P motor. Initially allowing you to switch manually from the Star to the Delta configuration dependent upon the wind speed and later, fitting a device that does it automatically whilst the rotor is rotating.
It will also show a device that enables me to test the effectiveness of modifications I make to the rotor and protect the battery bank. It is called a Turbine Development Controller and is a normal Charge Controller with connections to a dump but with the unique facilities of measuring wind and rotor speed, voltage and current output, with the added facility of downloading the data to a data stick. It is hoped that this device will be commercially available in the future.
The finished project will include:
1) An optimised rotor,
2) Base and tower to hold the rotor up in "clean" air,
3) Turbine Development Controller which is a Charge Controller that also measures wind and rotor speed, voltage and current output and records the information onto a data stick. Turbine Development Controller at prototype stage and now fitted to my VAWT.
4) Rewired F&P motor configured to run in Star and Delta dependent upon the wind speed and using a controller to switch automatically one to the other. Objectives are to achieve a steady output of 5-6amps, with a maximum output of around 12amps. Switching controller at prototype stage.
5) Rectifier to convert AC to 12v DC. Prototype available and fitted to my VAWT.
7) Controller that switches automatically between stored power and mains supply' .Prototype being produced.
Limitations of this Instructable
In the early stages, this Instructable will NOT show a rotor and frame design which you can make, knowing for definite that it will achieve the targeted outputs with an F&P motor. Wiring of the F&P motor and elctronic components won't change.
Once the project is complete, I will do a final modification of the rotor and tower pages and then you can be confident that, if you follow the design and items used, IT WILL ALL WORK. Please remember however that you should do similar testing of your set up to ensure the correct balance between YOUR rotor and generator combination.
I am not an expert on electrics or electronics, but was fortunate enough to strike up a conversation, whilst buying a charge controller, from Dave Styles of Karasouli (Karasouli website) . Dave is an Electrical Engineer, and therefore an expert on electrics and electronics. Plus, both he and his company have been involved with a number of Wind Turbine projects and have, and are creating, effective controllers and other equipment that get the best out of any wind project.
I understand the basics of Aerodynamics and how they apply to a VAWT and will use this knowledge to complete a rotor, which I will connect to the F&P motor I have modified, to produce a steady charging current of 3-4 amps in prevailing winds, with an optimum output of around 12 amps..
Since starting this project, I have met an Engineer that has designed, built and used VAWT's. The next VAWT will be built using his and Dave's expertise. As I always say, it is not what you know, but who you know, that is important.
Objectives of the Project.
I own a 600litre Reef tank system (see image above) that is a living Memorial to Nic, our daughter, that we lost a couple of years ago.
Over time, I have converted everything on the system to 12V to reduce the electricity consumption. I now have a system that draws less than 30A.when everything is on.
The objective is therefore to produce a Wind Turbine that is capable of producing a steady 3-4 amps in prevailing average wind speeds. With a maximum output in the region of 12amps at a rotor speed of around 200rpm and, once one has been built, to produce a second one..
Essential elements in the design
To achieve the output figures listed above.
Living in a built up area the rotor had to be quiet, cope with turbulent winds, and produce current in the prevailing average wind speeds of 12-14mph.
The control system has to be capable of protecting the battery bank, measuring the effectiveness of changes and modifications I make to the rotor, converting from AC to DC, converting 12V to 240V, and switching from turbine to mains electricity automatically..
Final comments re this Instructable
Hope it is fair to say that this Instructable will be worth following if you are in the least bit interested in building your own, effective VAWT. Unlike other projects I have read, this one WILL work, and will be easy to copy.