I have recently been assembling a basic guyed Oil drum 2 stage Savonius VAWT using a LG Smartdrive motor/generator.
I'm now at the testing and tweaking stage with the whole assembly rigged up in my workshop and me or wife spinning it by hand
At this time we are at the amazing and satisfying lighting a bulb when spun phase
I'm using two standard 50 gallon drums with a central shaft. I'm using an ex LG washing machine smartdrive motor in standard 3 phase star config to try and get some output at low rpm. I have not done any de-cogging as yet.
I using a standard 3 phase bridge rectifier made out of normal diodes at present, I have some Schottky ones on order. I am on the look out for unpolarised 100v 100uf caps to try that mod as well, once I have it up and running I may rewire stator depending on results.
I haven't decided on a final system voltage yet, I'll wait until I get some power results and then decide as I have a fairly flexible battery system in mind. Sadly I live in a very sheltered and turbulent wind area, I already have a normal Air-X type turbine which really struggles to stay into the wind.
Here are a few pics, I'll post more when it's up.