Jul
29
Wind Turbine Shaft RPM vs. Power Produced Part 2
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Part 2 of the discussion about maximum power point of direct drive wind turbines. This video shows one method for allowing the wind turbine shaft RPM to “float” higher for a certain voltage output than it normally would if it was left in the standard Wye configuration.
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6 Comments
July 29th, 2010 at 5:17 pm
@sjh7132
Your right, for the same RPM, the Delta would be approximately 53% less voltage. So for a Wye at 100 RPM, and 10 volts, you need a Delta connection at 200 RPM for the same 10 volts. Wattage stays the same in either configuration. I should have said the voltage would still be 10 volts, but the RPM would now be allowed to float to200.
July 29th, 2010 at 6:15 pm
I think you goofed on your math. The Delta would be 5.3v at 100RPM, but since you let it go to 200RPM that voltage would be about 10.4v
July 29th, 2010 at 7:08 pm
I do believe in fact i did make a mistake on the wiring, i will look at this option again. and see what happens. that for the help.
July 29th, 2010 at 7:29 pm
I do think that you have to use a PWM. Even if you change the the winding and approach the right Kv (rpm/V) you will change the generator power curve and there is a very big chance that your generator won’t match with your rotor power output.
I would suggest to use a MPPT controller. You can find them at Schams-electronic for example. They accept voltage to 100V and set the output to 12V or 24V. They also adapt your generator power to the power of the rotor
July 29th, 2010 at 8:09 pm
@daveydee1998 delta or star won’t change nothing on the cogging
and that’s for sure. You may have make a mistake in your wiring.
July 29th, 2010 at 9:02 pm
i found that in a delta connection it was more magnetically locked so it was harder for the shaft to turn, but that was on only one experiment that i had. iam currently in the process of rewinding a pma stator. i can try both configurations when iam done with that. great vid.