Here is a link to my geared prototypes output in 6-8 mph wind..We had to have steady 8-9 mph to get it up to speed....
The one nice thing about your setup with longer blades, gearing, and weight is that the voltage is more steady allowing the GTI to lock on. I do have a question though. You mentioned in your 650w (25 mph) wind video of charge controllers and batteries being in the picture while you were showing the GTI output. It would help to know your configuration for each video, perhaps added to the description. Now try the 750!
its the same configuration :?: Are you saying that you want to know how I have the grid ties tied in? I will update this thread after I wire in the terminal blocks I have now... Basically the switchable 12.8v and the 22-60 are hooked directly at the rectifier and a run from there goes to a diode to feed the batteries. No backfeeding to the gridties from the bank.. The 12v has a on/off button and when winds are bad I just turn it on(have another on the way) and it will bring the rpm down to match 16 - 18volts. I am alittle nervouse to let it spin on the 24 volt system in high winds because of all the other mishaps...I can not furl so I have to be able to load up enough resistance to keep it under a heavy load during high winds.
FYI: Steve at USVAWT.com has a 28V limiter product designed which is also a 3-phase bridge. It will be on their website within days. They just got boards in to stuff. It is used to protect GTIs. Two styles of the rectifier / limiter circuit will be available. The first is the economy version which will be the high efficientcy rectifier and limiter. It will be good for 15 amps continous through the rectifiers and should be good for most small home turbines. The target price is about $40.00. The second is a heavy duty version that will be attached to a beefy heat sink and be good for 40 amps continous. The target price is about $89.00. The other choice in the product is the limiting voltage. There will be several choices: 27.5 v for 28v GTIs, and 55.5v for 28v-56v GTIs.
