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chris_psmith
New Member
United Kingdom
79 Posts |
 Posted - 03/02/2008 : 16:38:57
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Bit of an obvious one if you already know, but i don't so:
How are the speed of the genny, the load placed on it and the resitance to rotation related.
So, if my genny is spinning at 300rpm, with rated power of 200w and i connect a battery to it, will it have less load than sticking a light on it, in a similar vein, if you have a charge controler with a dump load, will it chuck all 200W (whats available) down the dump load, so if you have a water heater it will place a large turning resistance on the turbine.
In short, hoe does the magic maker work?
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ghurd
Junior Member
USA
313 Posts |
Posted - 03/02/2008 : 19:12:38
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"TSR". A lot of ground to cover!
The blades are deigned to turn X RPM, in Y MPH wind, with Z power being extracted.
Pull out less power and they spin faster. Pull out too much more and they stall.
Try to get 5W when only 1W is available, and they stall.
Only pull out 1W when they want 5W extracted, and they overspeed.
It is a balancing act.
A dump load controller only sends what power is 'extra' to the dump load. The voltage remains the same, so it will have no effect on the RPM.
A few types of controller short the windmill, stalling it. They should be avoided, IMHO.
G-
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chris_psmith
New Member
United Kingdom
79 Posts |
Posted - 06/02/2008 : 12:22:19
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| Let my try a different wording - If the genny is spinning at 300rpm and giving an expected output of 100w, if i then turn on a 60w light will the genny slow down because of the load? |
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ghurd
Junior Member
USA
313 Posts |
Posted - 06/02/2008 : 19:56:36
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Without a battery? Yes, but it will still be spinning a little faster than the design TSR of the blades.
With a battery, yes, but minutely slower. I think.
G- |
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load v's speed
