Homebrewed Electricity > Frequently Asked Questions (FAQs)
Revisiting rectifiers
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pellets4fuel:
I did a fair share of searching past posts on rectifiers. Learned quite a bit. Most of the posts are older though, so I thought maybe some new insight has come up. I have a 12ft machine that I built. I have the tower and concrete for it done, and will start raising things in the near future. I need to come up with a rectifier yet though. Dans' book spells it out pretty plain how to build one, but I am still a little intimidated, and time is also precious. Is anyone here building them to sell or could you point me in a direction of at least a pre crafted rectifier. Someone in past posts said check out henhugger on ebay. His user name comes up, but he don't have anything listed for sale. I am hoping to find something complete maybe with a box and shorting switch built in. I did price out the ones Midnite solar made with the rectifier and 3phase breakers for shorting. They made them for the Bergy XL. Bergy still has them in stock. Seems a little much for what it is, but maybe not. 545.00 is what they told me. I am not sure the rectifier in that box would be big enough though.
Also wondering if anyone has suggestions or a link to what to use for a weather proof e-stop switch at the base of the tower, and an approach to installing the kellum grip for the chord going down through the yaw bearing cap.
Thanks!
David
JW:
Not sure if this will work
http://www.ebay.com/itm/100-NEW-THREE-PHASE-RECTIFIER-BRIDGE-DIODE-MODULE-300AMP-/251144438912?hash=item3a79600480:g:pwYAAOSwYshUZ8CW&vxp=mtr
JW
pellets4fuel:
JW
Thanks for that link back in Dec. Wanted to just comment on this thread to bump it to hopefully get some more input on my questions.
Thanks!
David
pellets4fuel:
Does anyone else have any input on this "old" topic? The ebay link comes up fine, and I could get that one. Would one suffice, and is the heat sink on it big enough, or would a bigger one be better?
Are there any other options like say one out of a car or truck alternator?
Thanks!
David
XeonPony:
Old but I'll post my bit:
1 - General rule is size it 2 times the continuous load
2 - All ways use way way more heat sink then it needs or that you think it needs
3 - Securely mount them and keep wiring clean
4 - Fuse both AC and DC side if a diode lets go there will be smoke and or flame if not it just explodes! Fuses and shut offs are very good at this point!
5 - Check them from time to time, how often is your choice me it tends to be once a year, remove weak ones be, for they go.
6 - Stud mount units will hurt the pocket book at first but will out live you, not to mention easy to test! Further more easier to mount to a nice massive heat sink! So well worth the initial investment.
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