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STICKY:
Spinoff Results
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I'm creating this thread to hold the spinoff simulation results. I'm going to keep it protected so that this thread will only have results. All comments should be posted to Spinoff Discussion. For each turbine tested, I'm going to post as complete and consistent information package as I can. My...
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sjh7132
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STICKY:
Forum Guidelines
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This forum, and its' parent (www.windgen.org,) were started to encourage the development of wind turbines that can produce usable power in low winds. There are milestones in development in the form of sellable turbines and ancillary products (possibly spawned in part by this discussion.) Th...
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windgen
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STICKY:
Engineering Calculators and Tutorials
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Ed Lenz has worked tirelessly contributing to the education of people interested in wind generators. For real hands-on practical demonstrations, see: http://www.windgenkits.com/Tutorials.htm. For the theoretical side of things, the Danish Wind Industry Association has published a grea...
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windgen
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7413
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transformers how do the work ..
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Hello folks, around once more :-) have lost way to mutch time with trying to pay all the bills :-/ times need to change or i will need to lower my standards ..... its nuts i need to work 12-16 hour days to have the same comfort and hobby's as when is was working only 8 hour 15 years ago ......... ****ed up worl...
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meirus
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Started New VAWT proto-type
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I completed fabricating a new VAWT. I still need to attach the PMA. I will first try direct drive and if that proofs not to provide enough RPMs it can easily be configure with a pulley and belt drive. The proto-type shows the hub needs a lot of improvement and I still need to add alignment braces to the top a...
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GoVertical
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483
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A small, low cost VAWT
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Marcus suggested ressurecting the 5 for 25 project thread. But perhaps the target should be just a small, low cost VAWT and work from there. The goal could be to light a CFL or LED light either directly from the turbine or from a battery. Here is a link to the 5 for 25 project for reference. And here is an i...
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Caleb
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Litz wire
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I'm seeing more and more references to Litz wire for use in AC coils to achieve higher efficiencies. It seems it would be great for high frequency inductors. Has anyone had experience using this wire? http://en.wikipedia.org/wiki/Litz_wire
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fluitic
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MPPT Specs
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I'm staring this thread because I'm finishing up my MPPT design and wanted to get some feed back on some of the specs before I started to route the board. First voltages and currents: Max input voltage 600v (400v mppt range) Max input current 60A Max output voltage 100V Max output current 60A The 60 amp...
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sjh7132
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Off Topic thread- post whatever non-VAWT stuff here
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"I wish we had another personal area here that we could share stuff non related to mills on. I'm sure we could tell some interesting stuff. I did a show and tell one time for 4th graders that was precious!" Jim Wish granted Turtle
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keithturtle
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258
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Performance Calcs
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I've been trying to apply equations from a paper to my 20" diameter turbine. I don't know why yet, but my Cp values seem to be quite high. I'm hoping it is simply a problem with a constant like I forgot to divide by 2 somewhere. However, the curves appear to be reasonable. If the calculations hav...
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Caleb
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Magnet application questions
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I have made two VAWT turbine designs and am beginning to test each using just a pm motor for comparison. My question now is concerning magnets. I know that I will be using Neodymium magnets. I want to use these for the rotors. I am curious as to the fact that most designs that I see have a metal stator plate....
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gregory
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Tesla Bladeless Wind Turbine
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Hello everyone, my first ever post here... There has been a lot of discussion around the feasibility of using the Tesla Disc Turbine concept as a wind turbine. Several people have tried to boast their own turbines such as the Fuller and the Tesnic, however there has been a strange lack of evidence rega...
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lonesomejordyverrill
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Favorite VAWT Application
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I liked this application of a VAWT to turn a composter.
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Caleb
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Anemometer for Turbulent Winds
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VAWTs generally run effeciently close to the ground when compared to HAWTs that do not react well in turbulence. Has anyone looked into anemometers that are accurate in turbulent situations? With Steves' advances in MPPT control, wouldn't it be beneficial to have accurate turbulent (close to gr...
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windgen
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Can a Buck converter improve turbine performance???
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After watching Steves video on MPPT, I wonder if a Buck converter would improve turbine performance by limiting the affect of additional loading created by the stators internal resistance. http://en.wikipedia.org/wiki/Buck_converter I found a article in Power Electronics Technology_...
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GoVertical
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small wind turbine retro load controller
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(old title: Low Wind joule Thief) Part 1 : Project Background Here is a little background info on why I ended up using a circuit design that was created over 90 years ago to control the load on my little wind turbines. This project got started in 2006 when I read the Fieldlines forum discussion on "M...
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JeffD
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MPPT Testing
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For those of you who think my MPPT is vaporware, here is a crude video of some of my testing. -- Edited by sjh7132 on Wednesday 2nd of May 2012 04:32:36 PM
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sjh7132
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Horseshoe Magnet Rotors????
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Hi, has anyone considered using horse shaped magnets for the rotors of the axial flux PMA. The metal backing on the rotors could be removed, the flux path would be contained within the magnets. The rotors would be easier to fabricate. Drill holes in a plastic rotor and magnetic fields would hole the m...
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GoVertical
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1024
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Hybrid Controllers
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Has anyone had experience with, or can otherwise comment on hybrid controllers, such as http://www.greenergystar.com/shop/56-solarwind-hybrid-rx.html. -- Edited by windgen on Friday 11th of May 2012 09:28:58 AM
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windgen
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Feeding the Grid
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Given the wind turbulence near the ground, how feasible is it to attach a GTI to a VAWT and expect some reliable efficiencies? As Steve has pointed out, the electrical spiking that occurs could best be buffered by a battery bank, or some super-capacitors or similar. Not being an electronic guy, I ten...
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windgen
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Smart Drive
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I created this thread for smart drive info.
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sjh7132
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Adjustable Load
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This circuit is related to the buck converter, but I started this thread because I didn't want to hi-jack the buck converter thread with this circuit. I'm not sure it will work, but I'll just throw the schematic out there for comments. The parts are on order, and I'll add more once I know if it works or n...
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Caleb
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vawts in use producing power- inspirational pictures, links, details
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perhaps as inspiration we should look at some who have had varying amounts of success in the developement of this " free" energy resource http://www.youtube.com/watch?v=csxl83XfyxA here is an installation in northern Canada.
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itsandbits1
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WARP - Wind Amplified Rotor Platforms
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Wind Amplified Rotor Platforms: Lower rotor diameter, higher rotor rpm, lower generator cost, modular, etc. -- Edited by fonix on Tuesday 10th of April 2012 02:49:41 PM
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fonix
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High voltage stator
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Here is a view of another stator I'm working on to be used with Steve's MPPT controller. The goal is to get the voltage up for low I^2R losses, put a lot of copper between the magnets for good efficiency and let Steve's board do its magic.
This has 220 turns of 28 AWG per coil cast into a 5-3/4" dia by 3...
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Caleb
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is this a VAWT????????
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A different approach http://www.windynation.com/community/threads/vertical-horizontal-not-sure-where-to-put-this.415/ Some have experimented with HAWT, but is this a VAWT????????
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GoVertical
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Free wind+turbine eBook @ InTech - Open Science Open Minds | InTechOpen
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http://www.intechopen.com/search/6/wind+turbine
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WindBite
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1180
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Twillers
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This is where some of my spare time has gone the last 6 month.
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fluitic
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Wind2Water turbine
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Little off topic, but... http://youtu.be/zhe4jDWfFAY http://www.eolewater.com/gb/our-products/range.html
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fonix
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Generator Question
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I am not mad, but I have the following question AC PMG 3 wires comming out negitave and positive current flowing backwards and farwards. DC PMG 2 wires negitave and positive current flowing backwards and farwards. Question DC PMG 2 wires, one going in and one out and no negitive flowing backwards just...
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MarkW
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