To stack voltage sources is almost certainly NOT a good idea. Current sources would however probably work great. I have seen both current and voltage sources have been used as battery chargers.
On Sat, 23 Jul 2016 11:58:38 -0400 Gene Heskett <[email protected]> wrote: > On Saturday 23 July 2016 07:19:30 Erik Christiansen wrote: > > > On 23.07.16 06:01, Gene Heskett wrote: > > > On Saturday 23 July 2016 04:03:24 Erik Christiansen wrote: > > > > http://www.banggood.com/Low-ZVS-12-48V-20A-1000W-High-Frequency-In > > > >duct ion-Heating-Machine-Module-p-1038472.html > > > > > > That looks like a cute little starter kit. But I searched thru all > > > 680 of the power supplies they sell, looking for a suitable supply > > > to run it with, and came up empty. So it looks like the PSU to run > > > it will need to come from some place else, or a DIY project, and my > > > junk box isn't that well equipt. > > > > The unused 48v battery charger at the back of my garage is about a 2.5 > > foot cube, and packs around 65v & 20+ amps, cranked up. The freight to > > your neck of the woods would be prohibitive, though. > > > > ... > > > > > > The supplied work coil appears to have an ID of 40mm, and height > > > > of 50 mm, but point 5 prohibits a work cylinder of more than 1/3 > > > > of the ID (i.e. 13.3 mm), to avoid overload and burnout. It could > > > > just about suit your application, Gene. > > > > > > Yes I agree. But a 48-60 volt, 25+ amp supply for it does not appear > > > to be available in their 150,000 products. That would appear to > > > need its own 230 supply line breaker if it could be found. > > > > Even on fleabay, pickings are slim. If these have isolated output, > > then two could perhaps be stacked for 1.2 kW @ 48v: (select > > "600w-24v25a") > > I've had stability problems in the one's I tried to stack. They would see > surges and one or the other would do a shutdown. > > But up in the ceiling in the shop is a rack of 5 ea 48 volt 3.3 amps I > got 5 of for $95 on a make an offer basis on fleabay, turned then down > to 42 volts and paralleled them all with .5 ohm current share forceing > r's into about 6300 uf, that will be the motor psu for my toy mill in > due time, about the same time I put a 5i25 card in it so I can get some > real rapids. I've fitted a good sized fan to blow on those since they > are up in 100f+ temps in the summer with their overhead location. > > A project I started last fall but got too cold before I got done, maybe I > can get it done if the heat ever gets reasonable this fall. I tend to > say quit when the digital temp/humidity thing hanging on the bandsaw > says 95+. And thats with an exhaust fan on a thermostat that may not > have shut down in the night for several nights. The usual 18" attic > fan, wall mounted with a blow open shutter. > > > http://www.ebay.com.au/itm/600W-DC-24V-48V-15A-Regulated-Switching-Pow > >er-Supply-Driver-for-LED-Strip-Light-/201151183128?var=&hash=item2ed58b > >7918:m:mBZLUStoF2DEKdHUlGuurvg > > > > A$84 is about US$63 ea. > > > > Here's one from USA, used but working, for US$150: > > > > http://www.ebay.com.au/itm/Tyco-Lineage-Power-QS853A-Power-Supply-PBP3 > >AVUCAA-25A-48V-B-/331901066990?hash=item4d46d85eee:g:nZ8AAOSwBahVPnE5 > > > > There's another US$52 postage to here, but it'd have to be less to WV, > > even if the last bit is uphill. > > Its uphill both ways Erik. ;-) These hills aren't "over there" they are > right in your face hills, often steep enough you need rock climbing > gear. I've some of that about 75 yards north. > > > As 48v/25A is only 1.2 kW, i.e. only 5A @ 240v, I'd be happy to plug > > two of them into one double outlet here. Outlets are on 10A breakers > > here. (15A for the welder circuit in the garage.) > > > > I think I'll wait till I have the 48v battery bank and solar array > > that's on the to-do list. Then there's no issue with 48v power > > supplies any more. > > > I'd have such a setup on my list too, but I'd never live to see the > payback. > > > Erik > > > > ---------------------------------------------------------------------- > >-------- What NetFlow Analyzer can do for you? Monitors network > > bandwidth and traffic patterns at an interface-level. Reveals which > > users, apps, and protocols are consuming the most bandwidth. Provides > > multi-vendor support for NetFlow, J-Flow, sFlow and other flows. Make > > informed decisions using capacity planning > > reports.http://sdm.link/zohodev2dev > > _______________________________________________ > > Emc-users mailing list > > [email protected] > > https://lists.sourceforge.net/lists/listinfo/emc-users > > > Cheers, Gene Heskett > -- > "There are four boxes to be used in defense of liberty: > soap, ballot, jury, and ammo. Please use in that order." > -Ed Howdershelt (Author) > Genes Web page <http://geneslinuxbox.net:6309/gene> > > ------------------------------------------------------------------------------ > What NetFlow Analyzer can do for you? Monitors network bandwidth and traffic > patterns at an interface-level. Reveals which users, apps, and protocols are > consuming the most bandwidth. Provides multi-vendor support for NetFlow, > J-Flow, sFlow and other flows. Make informed decisions using capacity planning > reports.http://sdm.link/zohodev2dev > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users ------------------------------------------------------------------------------ What NetFlow Analyzer can do for you? Monitors network bandwidth and traffic patterns at an interface-level. Reveals which users, apps, and protocols are consuming the most bandwidth. Provides multi-vendor support for NetFlow, J-Flow, sFlow and other flows. Make informed decisions using capacity planning reports.http://sdm.link/zohodev2dev _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
