All I know is these are the charts they sent and said they are open volt no load tests. If you are getting something different then I will have another dispute with EFFSUN on this. My 600 watt is 600w at 28 volts at 480rpm at 17 mph with 2.8ft blade set. But Amy Zhang told me that those charts are not how they rate the pmas. They do not put blades on and run in a wind tunnel with a 24 volt battery system on it to test for output. They design the PMA for 28 volts, Then they run open volt and shorted current tests and come up with the RPM to Watts chart. Where as Windy Nation tests are with a load on them. Better real world test.
Good morning Tom, can you please check my math and reasoning for open volts from my charts on the 1 & 2 kw turbines. On the chart for your 600 what was the approx cut in rpm ? I know all this info for us on charts and open Volts can be misleading because when we hook up to a load the whole world changes ,,, and then changes again if two people have Yhe same turbine but choose different methods to use it or different voltage levels of inverters to feed into,,,,,,the load changes and then so does a power chart ! My tower builds and new furling mount systems I built have taken a considerable amount of my time but now when it comes down to the crunch of needing to make that important decision of how to make the most beneficial use of those turbines potential, I sometimes feel like I am just starting all over again in the world of wind power. Sorry Jason if we are writing all over your post but I am glad you started this thread because I needed to talk with all of you to learn and help me make proper choices .
150 rpm for 12 volts 275 for 24 volts With a rectifier it changes to this. 125 rpm for 12 volts 215 rpm for 24 volts This is what I tested. The chart shows :
OK Murray. I ran an open volts test and it is on You Tube. Link is below. So after this now my question is how do they test for open volts. Even testing two legs for AC volts I get 56 VAC at 600 RPM. http://www.youtube.com/watch?v=H_LsFbE3ayw
Wow this thing is huge and very heavy...design is gonna have to be important..The wires are thick.6 gauge I am guessing.This is gonna be a slow moving project I think the frame will have to be welded by someone that is good at it.I do not trust my welding..
Hey Blue, No kidding they are big ! I will post a few picks tomorrow for you on the mounts I welded for my mine. On the wires, I had told Larry I estimated them at # 8 but pleased to hear you are thinking # 6. Take note of where those wires leave the turbine, there are rubber grommets but I am sure we should be siliconing to ensure no moisture .
I am thinking the frame effsun has with a yaw bearing..Only $65 and prolly that much in shipping but the tails are fixed.Told laura if you have a elctric line issue and lose braking that way at least a furling tail might keep total tower failure not a guarentee.I have had my experience with no furling and will never go down that road again but am thinking the four bolt pattern on the back of there housing frames will be easy to make a attachment for a bolt style pivot tail..
Ok, if your buying one that is good. I am close to posting my whole build from tower up on both my 1 kw & 2 kw, all my mounts are furling .
Since murray never showed what he said he would,,here is my new windy/custom frame for the 2kw..Ready for paint and will have about 50lbs counter weights behind the tower mount.. Spinning this thing by hand with the hub on as fast as I could and I could barely get 2 volts out of one lead..very happy..
so short it? I put the neg on the motor case...I will try that and post later.. Damn it,I hit 39 volts. How does the 500/750 compare to this same test? I was planning on running the other 2 turbines with the combined dc voltage and was hoping to help make sure it never goes over 60 volts..I have way to many GT's to loose..I also was planning on building a 48v bank to also dump into.
The windings should be insulated from the case. Or do like I did. Run it through the rectifier and check across the terminals for DC output.
I just hope its truly the 56v model,,sure looks like the 3kw model they have thats 240v dc..That would F# up everything..I guess I would just wire it to the dump permanently for heat thru the winter while I figured out how to come up with big money for higher voltages GT's... It will be up and flying tomorrow and they are calling for 10-20mph winds so we will sure find out..went with the 10.5 ft blades on this
Mini crane Me and my bud made to set the gen head...Wind died right down after we set it,it stayed spinning for a hour and so.The other two died out but with all that weight it made it thru the small gusts and steadily put out 10-50w and was right at 22v..sure in heavy winds I am going to have to build a battery bank to help cap voltages.
For voltage cap on mine I was using two garden tractor batteries. When using battery for capping only a trickle goes to it. The rest goes to the grid ties.
