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flc1
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Posted: 13 October 2015 at 8:41pm | IP Logged Quote flc1

have finnaly finnished developing the right stator setup for my windturbine, it is a similar setup to what Davep68 has decribed, I wish I had seen his test results before I started building mine, I must have pulled down my turbine 10 times in the last year or so to test diffrent stators etc, anyway,,, now I have installed 2 x .6mm 36 pole stators, the first is direct drive and is electrily cut in half,with each half wired in delta, cutin rpm is approx 140rpm, the second stator is cut in 3/3 ,and each third is wired as star, and it is geared up 1.5 times, to cut in at approx 75 rpm, both stators are fitted with the black rotor caps,with the stronger magnets, there is a slight loss of rpm in light winds due to the extra loading from the stronger magnets, but a large gain in power once the windspeed increases, I have gone away from useing the 42 pole stators as there always seems to be more cogging with them when compared with the 36 poles, even after decogging. The turbine has 8 blades ,with a diameter is 2.4 meters,with a swept area of aprox 2.3m, peak rpm is approx 500 rpm it is useing a 1000watt 45-90v dc input gridtie inverter.So far it has reached 855 watts on the ac output side of the inverter, so thats about 925 on the dc input side, and the turbine was nearly at its furling point, so I hoping to get about 930 peak ac output when turbine starts furling, finnaly I am happy with the output of the turbine


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flc1
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Posted: 13 October 2015 at 9:01pm | IP Logged Quote flc1



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DaveP68
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Posted: 16 October 2015 at 3:38am | IP Logged Quote DaveP68

Hiya

Well done on getting such a high peak output. I note you have already made a comment on my set up which is pretty close to your configuration. I have gone for the 22-60V Inverter as it has a better operating range of voltage. It seem you have gone for a higher voltage system, but still got great results!

Just like to ask if during all your experimenting did you every use batteries on a lower voltage set up (48V) with your Grid Tie Inverter?


Cheers

David
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flc1
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Posted: 16 October 2015 at 5:04am | IP Logged Quote flc1

Gday Dave,yep I had batterys hooked up to my windturbine ,Im on the grid, and I know they are a must have if you are off the grid and don't want to live by candle light ,this is just my experience with them. I was useing them as a voltage regulator,the turbine never seemed to perform aswell through the batterys,to much wasted energy going into the batterys to keep the inverter going and the voltage up,I had solid state relays to stop the batterys being cycled too deep,to try and make them last, really just a pain in the ass, blew up 2 inverters, and a charge controller,made my own dumpload resistors etc, I was trying to do things on the cheap but it ended up costing heaps in money and wasted time looking after batterys and replacing cooked electronics and cooked batterys,when I found the actual windturbine gridtie inverters online it was a relief,they come with there own dumpload resistor,just hooked it up ,and forgot about it.so much easier,,,they work well.So Im not really a big fan of batterys at the moment,but who knows what the future holds, with the way the power companys in this country ripp everybody off, we may have to go off grid one day in the future,our gridtie system at home is about 4.2 kw solar pv and 1kw windturbine,and a 300 litre solar water heater, ,the testing you are doing with the f n p stators is good,very handy for any body wanting to work out what setup they may need for there f n p wind turbine or hydro, cheers Fred

Edited by flc1 on 16 October 2015 at 5:31am
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flc1
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Posted: 05 November 2015 at 4:18am | IP Logged Quote flc1

Just an update,turbine has recently put out 957w ac, ,, more than expected, I did'nt see if was furling, not at home at the time.
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domwild
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Posted: 01 December 2015 at 10:45pm | IP Logged Quote domwild

Great! What sort of a wind grid-tie did you pick? Is it the 1000W SUN-1000G-WDL-H-E? Quite an alphabet soup!

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flc1
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Posted: 02 December 2015 at 7:30am | IP Logged Quote flc1

Gday. Yea I think that is the one
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flc1
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Posted: 25 March 2016 at 3:05am | IP Logged Quote flc1

latest output is 1017w ac
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DaveP68
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Posted: 27 March 2016 at 1:06am | IP Logged Quote DaveP68

flc1 wrote:
latest output is 1017w ac

Hi Fred

Wow over a 1000W on AC side which means that the DC power output into the inverter will be over 1100W so your setup keeps getting better...

Here is a table of power output from a 36 pole Stator wired in Delta mode uncut and using a Black rotor cap into a 86 ohm load. The 1/2 cut plus 1/3 cut results in the table are scaled. I have already proven the scaling dose work from other testing just didn't want to repeat the same RPM tests another 2 times.

RPM Watts Volts Amps Volts 1/2 Amps 1/2 Volts 1/3 Amps 1/3
60___12.5__33__0.38__16.5______0.76_____11.00_____1.14
100__32.2__52__0.62__26.0______1.24_____17.33_____1.86
120__46.5__62__0.75__31.0______1.50_____20.67_____2.25
150__69.9__76__0.92__38.0______1.84_____25.33_____2.76
180__94.5__90__1.05__45.0______2.10_____30.00_____3.15
200__121__100__1.21__50.0______2.42_____33.33_____3.63
250__178__123__1.45__61.5______2.90_____41.00_____4.35
300__245__144__1.70__72.0______3.40_____48.00_____5.10
350__311__162__1.92__81.0______3.84_____54.00_____5.76
400__384__183__2.10__91.5______4.20_____61.00_____6.30
450__454__200__2.27__100.0_____4.54_____66.67_____6.81
500__527__215__2.45__107.5_____4.90_____71.67_____7.35
550__585__225__2.60__112.5_____5.20_____75.00_____7.80
588__660__240__2.75__120.0_____5.50_____80.00_____8.25
800__880__275__3.20__137.5_____6.40_____91.67_____9.60

The maximum output 880W was due to me using a 1200W drill with which resulted in that being the maximum shaft power it could produce.

The 86 ohm load is the optimum load for this stator uncut in delta mode. Any deviation from this load to a higher or lower resistance will result in a lower output power. You will now see why it isn't practicle to connect them directly to a battery without using a DC-DC converter or some form of switching system at cutting in at different RPM ranges.

Hope this data is of use to you and others that would like to use it.

Anyway keep up the good work Fred..

Cheers

David

Edited by DaveP68 on 27 March 2016 at 1:38am
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flc1
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Posted: 27 March 2016 at 4:00am | IP Logged Quote flc1

Gday Dave, thanks for loading your test results, thats awsom work. I wish I had a lath so I could spin up a F n P to the very max, to see what it would do, just keep increasing the rpm untill it destroys itself ..ha! what do you rekon?

Edited by flc1 on 27 March 2016 at 6:27am
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govertical
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Posted: 27 March 2016 at 1:00pm | IP Logged Quote govertical

https://youtu.be/MdGf6n4ZUd0

fast forward to about 7:00

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flc1
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Posted: 28 March 2016 at 3:51am | IP Logged Quote flc1

hey thanks for that govertical, found it, good veiwing, but not exactly what I was looking for.

Edited by flc1 on 28 March 2016 at 5:45am
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