Wind generator stop switch

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ferroboat

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I have a Superwind 350 wind generator fitted with a stop switch to short-circuit the generator to effect substantial reduction of the rotor speed. in stop position the switch also disconnects the shorted generator from the battery circuit. Is it harmful to engage it for long periods?
My wife doesn't like the whining noise that comes from the two large power resistors that dump excess power when we are in a marina on shore power with fully charged batteries i.e. the coming winter.
Thanks in anticipation.

http://moonshineofmersea.wordpress.com/

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My 913 is connected to all other electrical inputs, and stops when the alternator or the battery charger is active. This in addition to being able to switch it off at the MPPT controller for quiet nights.
NO problems so far, 3 seasons.
 
FullCircle said:
My 913 is connected to all other electrical inputs, and stops when the alternator or the battery charger is active. This in addition to being able to switch it off at the MPPT controller for quiet nights.
NO problems so far, 3 seasons.
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How did you wire that up Jim.
I have a relay that pulls in to disconnect the wind gen controller but not when the batt charger is on
 
sailorman said:
How did you wire that up Jim.
I have a relay that pulls in to disconnect the wind gen controller but not when the batt charger is on
Click to expand...

I have the latest Sterling Alternator to Battery Charger.
I have ALL my inputs going through the input post, and the A2B sorts out the output and charging programme.
This includes the Solar Panel, the Wind Generator, both coming in from the MPPT Marlec controller, as well as the 25a Cristec Mains battery charger.
When the Marlec HRDX sees 14.4v, either from the alternator or the battery it tells the Wind gen to cut out, and the HRDX to go onto float mode.
 
Tony Cross said:
Out of interest, why? If it's unable to rotate how do the bearings get knackered?
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As far as I understand it's because there will be slight movement at one point which will wear the bearings at that point. Maybe it's better to cover the whole wind gen with a bag to stop the wind getting to it.

Don't shoot the messenger if I'm wrong, that's just what I've been told!
 
NornaBiron said:
As far as I understand it's because there will be slight movement at one point which will wear the bearings at that point. Maybe it's better to cover the whole wind gen with a bag to stop the wind getting to it.

Don't shoot the messenger if I'm wrong, that's just what I've been told!
Click to expand...
possibly not able to dissipate any moisture
 
Tony Cross said:
Out of interest, why? If it's unable to rotate how do the bearings get knackered?
Click to expand...

The blades will still oscillate slightly, wearing one patch of the bearing at the bottom surface where the weight is rested, ably assisted by the water and crud that will find it's way to the bottom of the bearing.

By continual rotation, the lip seal is also engaged in the bearings, and the wear is even. Centripetal force will throw out the water ingress (such as it is).
 
FullCircle said:
The blades will still oscillate slightly, wearing one patch of the bearing at the bottom surface where the weight is rested, ably assisted by the water and crud that will find it's way to the bottom of the bearing.

By continual rotation, the lip seal is also engaged in the bearings, and the wear is even. Centripetal force will throw out the water ingress (such as it is).
Click to expand...

Never knew that, thanks for the info. I'll pass it along.... :)
 
FullCircle said:
The blades will still oscillate slightly, wearing one patch of the bearing at the bottom surface where the weight is rested, ably assisted by the water and crud that will find it's way to the bottom of the bearing.

By continual rotation, the lip seal is also engaged in the bearings, and the wear is even. Centripetal force will throw out the water ingress (such as it is).
Click to expand...


You can also get a small indentations (brinell effect) caused by the balls being in effect hammered into the surface of the race even if there is not rotational effect.

You can some times get the same effect on pulley blocks the are under high load that is why some times it is better to have plane bushes in stead of ball bearings if the extra friction is not a problem
 
Rogershaw said:
You can also get a small indentations (brinell effect) caused by the balls being in effect hammered into the surface of the race even if there is not rotational effect.

You can some times get the same effect on pulley blocks the are under high load that is why some times it is better to have plane bushes in stead of ball bearings if the extra friction is not a problem
Click to expand...

Cheers Roger, that's the effect I was describing - didn't feel the need to give it the name...
 
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