 Notice. New forum software under development. It's going to miss a few functions and look a bit ugly for a while, but I'm working on it full time now as the old forum was too unstable. Couple days, all good. If you notice any issues, please contact me. |
Forum Index : Windmills : Measuring cogg
  Page 5 of 5 |
|||||
| Author | Message | ||||
Pt w/field Matt Senior Member  Joined: 24/02/2006 Location: AustraliaPosts: 105 |
hi highlander why not go for 24volts less voltage drops and halve the cable size,beside that you can pickup cheap UPS boxes off ebay or computer stores quite cheaply,i go for apc smartups and they come in power outputs of 600 to 1500va all in 24volt form,there pure sine wave also.i use them to power up my tv,computer,7kg washing machine and 410 litre fridge just install a fan or 2 to keep things cool,rack mount jobs come with there own fan.they get thrown out or sold cheap because of dud batteries[they dont power up] matt down south |
||||
Highlander Senior Member Joined: 03/10/2006 Location: AustraliaPosts: 266 |
Matt, good Idea. I had a look at your 24v 7 phase thread, so the 7p2p will be ok for this? I have only been able to get .8mm's. The Neo's should add a little volts too. I've concreted foundations 50metres away up a steep hill, so 24v would help with v drop, and cable size. I've got the mast, guys, charge controller, deep cycles.Nearly done!!!! I already had a 1000 watt inverter I run in my vehicle, That's why I was going 12v. I'll have a look on ebay for ups. Dwyer, plates are going on fine with screws so no need to test weld, but if you want to satisfy your curiosity, have a crack. Central Victorian highlands |
||||
Megawatt Man Senior Member Joined: 03/05/2006 Location: AustraliaPosts: 119 |
G'day Highlander, grit your teeth mate, you're doing well. We all know what you're saying about time. More on adding to the magnetic circuit - to do this you'd really have to strip two stators and add the two sets of spiders, then rewind all the coils around both. Magnetically you'd be able to do 1200 Watts (if 600W is right for one). But we are getting to the point where we need to ask what is the max current we can extract from the wire sizes used. I would guess that in each of the F&P range, the designers used the most economical conductor sizes, so if the magic number is 600 watts, the conductors will operate at a satisfactory temperature when carrying full load current at the design speed and therefore design voltage. Make them carry more and they'll cook. What Matt says is right and the economical way to go in terms of time and money. If you want more output and you have the motive power, just use 2 F&Ps. If anyone would like, I'll go on a bit about NEVER using inverters that are "modified sin wave" or worse (read even cheaper) to power devices that contain Swtched Mode Power Supplies, ie nearly all modern electronic devices, because it will kill them. Same goes for cheap portable generators (I should say alternators). Megawatt Man |
||||
| KiwiJohn Guru  Joined: 01/12/2005 Location: New ZealandPosts: 691 |
I am interested Megawatt Man as to the problem with switch mode power supplies and "modified sine wave" inverters. As far as I know these devices rectify the "mains" input so surely the problem cannot be with wave shape? So just what is the problem please? |
||||
Gizmo Admin Group  Joined: 05/06/2004 Location: AustraliaPosts: 5078 |
Wow this is a long thread. Hope no one minds but I closed it off, its starting to drift off subject, and its getting so long that it takes ages to load up. KiwiJohn and Megawatt Man, could we start a new thread about the modified sine wave inverters, it is an interresting subject and deserves its own thread. Glenn The best time to plant a tree was twenty years ago, the second best time is right now. JAQ |
||||
| Page 5 of 5 |
|||||
 Print this page |
