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Re: Cu vs Al alternator windings

Discussion Board - 2 hours 19 min ago
I would keep clear of aluminium, it has problems, the only virtue is cheapness. A few years ago it would not have been attempted, things were expensive and had to last. In the present throw away society things are so cheap that they can't be expected t...

Re: Cu vs Al alternator windings

Discussion Board - 4 hours 46 min ago
Just a personal opinion
Maybe just me but IMO aluminum makes great beer cans for bad beer.
 the Only aluminum wound generators I have had any dealings with were welder/ generators. A company I was with bought 50 of them for their light duty install wo...

Re: Cu vs Al alternator windings

Discussion Board - 5 hours 9 min ago
Hi Jeff,

I too looked at the Champion 71530 from Costco. I hate to break the news to you but if you look at the owners manual at the parts description for the rotor and stator items 50 and 53 you will see the letters (Al) which means it uses aluminum ...

Re: Cu vs Al alternator windings

Discussion Board - 6 hours 42 min ago
I can't help you with the technical pro's and con's of aluminum vs copper alternator windings, but I recently picked up a new Champion 7kw 71530 dual fuel generator and it has copper windings.

Jeff

Cu vs Al alternator windings

Discussion Board - Tue, 08/26/2014 - 21:36
I'm in the process of purchasing a small, 7500 watt portable generator as emergency backup for my home just to run essentials, well pump, furnace, a few lights etc. In looking at various manufacturers I've noticed that more and more manufacturers are u...

Re: 100% off grid shed with Ebay stuff.

Discussion Board - Tue, 08/26/2014 - 16:13
Not sure just how Jermaine this post will be.
  But a few more things for consideration. location of the bank the charge controller the disconnects & the inverter are also very important.
 For disconnects to meet many fire department & city ordinance...

Re: Automotive alternator to PM alternator

Discussion Board - Tue, 08/26/2014 - 14:06
After a little tinkering a little more, I think I have the cogging about as good and I can expect. It is pretty smooth, although I haven't been able to quiet it down much but that could be resonance from the lathe it is mounted on. I wish it had more p...

Re: 100% off grid shed with Ebay stuff.

Discussion Board - Tue, 08/26/2014 - 13:42
Hi

I bought a pure sine wave inverter from ebay, it was not expensive but it certainly wasn't the cheapest, rated at 800W continuous 1KW surge 240V. It ran for months without a hitch in my shed. Then one day the lights didn't come on when I flicked the...

Re: I know...the community is about HAWT here but...

Discussion Board - Tue, 08/26/2014 - 13:21
Granted Electrondaddy that the builder gets the thing balanced and the airfoil exactly right, I agree.

Re: Active Pitchcontrol

Discussion Board - Tue, 08/26/2014 - 13:18
This is a fantastic design, the options for control are endless with the right circuitry. 

Kudos.

Re: 100% off grid shed with Ebay stuff.

Discussion Board - Tue, 08/26/2014 - 12:16
I have 8 panels 140w each there about all connected parallel.
  from each panel I have 4ft long 10 ga wires leading to a pair of  3/8" SS studs from there I ran #2ga wire 45ft to my charge controller/s also paralleled with #2ga to the main connection ...

Re: Automotive alternator to PM alternator

Discussion Board - Tue, 08/26/2014 - 11:49
Flux,
I tried the offset method as described in the link. Cogging is still present, but considerably reduced. It is low enough that I would consider it acceptable for my use. Voltage is > 0.1 vac of my first test voltage. I would still like to make som...

Re: Thrift store mini panel holder

Discussion Board - Tue, 08/26/2014 - 10:03
Hi Bruce,

Thanks.  I started using the little 9v connectors to help overcome some of the problems when using rechargeable batteries in appliances (voltage), as well as it makes it really simple to hook up to the little panels when charging.

example her...

Re: 100% off grid shed with Ebay stuff.

Discussion Board - Tue, 08/26/2014 - 07:49
Thank you for the tip.  For some reason, I have been missing these on Ebay.  I have seen a few reviews with the ones with "round" buttons and was told they were better.  I just bought one this morning

Do you have your panels connected in series or p...

Re: 100% off grid shed with Ebay stuff.

Discussion Board - Mon, 08/25/2014 - 23:03
This is what I have, admittedly there are probably better & more expensive charge controllers out there
 http://www.ebay.com/itm/LCD-PWM-60A-CM6024Z-Solar-Panel-Battery-Regulator-Charge-Controller-12-24V-1440W-/291223077946?pt=LH_DefaultDomain_0&hash=...

Re: 100% off grid shed with Ebay stuff.

Discussion Board - Mon, 08/25/2014 - 21:54
Can someone point me in the right direction for a decent charge controller that is around $100?  I would like it to be able to handle 30A minimum.  Amazon reviews are iffy and Ebay charge controllers scare me since it is an essential part of the entire...

Re: ATmega328P for OpenTRV use

Discussion Board - Mon, 08/25/2014 - 07:46
Hi,

Just in case anyone is interested in the backstory...

http://www.theregister.co.uk/2014/08/25/doing_my_own_ting_making_money_from_a_startup/

Rgds

Damon

Re: Thrift store mini panel holder

Discussion Board - Mon, 08/25/2014 - 07:14
Nice upcycling! I like the idea of using the connectors and labeling.

Re: direct drive generator as dc motor

Discussion Board - Mon, 08/25/2014 - 05:09
Oh Great!

These were the link's i was going through

https://www.youtube.com/watch?v=hGMxGhpRHzA
https://www.youtube.com/watch?v=_A2qBfGfwHE
https://www.youtube.com/watch?v=40b_D5-4tXQ

This basically works on armature with 1 Ferrite magnet.

Re: Thrift store mini panel holder

Discussion Board - Sun, 08/24/2014 - 15:30
I am not 100% sure, but from what I have read, acrylic generally is more "clear" than glass, I might have to do a little more research on that though, so the verdict is still out.



 
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