3 phase brake switch

[lookrent]

I am new to the wind power world and have been reading complicated and over simplified posts on many sites.my plan is to use a pma alt and run 3 phase down the tower to a box with a rectifier in it.my question is ,if I short the d/c voltage output from the rectifier to brake the blades will it damage my rectifier asm? I am using the diode asm from a delco 10si as my rectifier.if this is a stupid question go easy on me .I look forward to the expert info the seasoned wind power guru's can offer..

[Flux]

No if you short the dc output of the rectifier it will not generally damage the rectifier but you will have a fry up from shorting the battery. You would need some extra blocking diode or a change over shorting switch that disconnected the battery. Why bother if you have the rectifier at ground level just use a 2 pole switch and short the 3 incoming ac leads. Far simpler and safer and no danger of damaging the rectifier.

Flux

[lookrent]

first thank you for responding.can you elaborate on your response?how would I  wire a switch in before the diode asm? I know it sounds simple but I do not want to wire it wrong. any help you (or any other)can give would be helpfull..thanks

[Flux]

All you need to do is short all 3 incoming ac leads. I don't have time to do a drawing but I am sure there some on this board somewhere.

If you use a 2 pole on/off switch, you common 2 poles and connect them to one wire, the other 2 switch poles go to the other 2 wires. When the switch is open it does nothing. when closed the two poles short 2 pairs of wires to the common one. It is effectively a shorted open delta and does exactly the same as using a 3 pole switch ( which would do just as well but cost more).

Flux

[SparWeb]

I have a 3-pole switch just before the rectifier block:

[lookrent]

thank you steve (sparweb)your diagram is very helpful and well done