Wolv
"
I am interested as to what kind of resistive loads.
ie where these loads significantly increasing in temperature and lowering in resistance as the temp rose?
This could lead to missing the math involved with that change, therfore creating a sense of unpredictability?
Just a wild guess, I would not expect you to make simple oversites."
Yes the R could increase with temp, but that is not what was happening.
The R was a few microwave primaries..... in a bucket of water for cooling... (turned out to mean boiling)
No the problem was that I was thinking the furling would be the same... it's not.
Think about it, W=ExI.... but E=IxR.... so W=E^2/R.... even if the R changes a bit, and the E rises to keep the W the same, it is still really a square function. So for a given R load, it will absorb power as a square of the rpm, but the wind see things differently..... its power is a cube of the rpm...... therein lies the problem.
So unless you pick a monster load, and use PWM as Chris is going to do, you will be overpowered by an order of magnitude.... simple.
I knew that, and knew R may change, but inconsequential really, it was the furling that changed that made it so interesting. I know from experience that 4 ohm load on my mill is just no where near enough to try this with pwm mitigation, probably 2R might work. ( the two coils were about 4R from memory... total.)
As DaveB explained, is's the furling you need or more loads to switch in... one of the two (or more pwm into a huge load .. per Chris)
I'd like to claim some other losses from the inductive reactance of the coils to the frequency.... but that would be wishful thinking. Air coils in the mill stator would have the same problem.... and they didn't exhibit any lack of ooomph.
..................oztules