multipart question follows

p for 50Hz/208v. I don't need 14kW and figure 50Hz will use a little less LP and may increase lifetime. I use generator for mainly charging batterie s when sun isn't shining. My Schumacher 25A/48V chargers seem to be a litt le less efficient with the reduced voltage/frequency. I was never really i mpressed with them anyway and look forward to the day I list them on Ebay.

apart a large 10kW tape wound transformer. I left the 240v primary intact and just need to wind secondary.

ondary (Rubadue maybe?) I am also interested in your input on the topology . I can go with center-tapped secondary or not. I'm less concerned with t he efficiency so leaning towards one winding w/o center tap.

Wind a bifilar secondary with twisted pair - minimal leakage inductance, ma ximal interwinding capacitance (but not usually enough to worry about on a low voltage secondary. Getting a centre tap on that is easy.

ridge ZVS current source down the road. I just need to get something up an d running quick for now before I wear out this new generator.

The last time I got enamelled wire to wind a transformer I got it from

It's a UK comapny, and I was living in the Netherlands at the time.

Farnell/Newark offers a much more limited range of wires (and only one kind of enamel) but they sell everywhere.

--
Bill Sloman, Sydney

up for 50Hz/208v. I don't need 14kW and figure 50Hz will use a little les s LP and may increase lifetime. I use generator for mainly charging batter ies when sun isn't shining. My Schumacher 25A/48V chargers seem to be a li ttle less efficient with the reduced voltage/frequency. I was never really impressed with them anyway and look forward to the day I list them on Ebay .

ed apart a large 10kW tape wound transformer. I left the 240v primary inta ct and just need to wind secondary.

econdary (Rubadue maybe?) I am also interested in your input on the topolo gy. I can go with center-tapped secondary or not. I'm less concerned with the efficiency so leaning towards one winding w/o center tap.

Depends on if you have enough space in the xformer secondary for the copper . One winding with full wave bridge makes the best use of the copper but has

2 diode losses. A center tap makes less efficient use of the copper but ha s only one diode loss.

If you have plenty of space for the secondary copper, go with the center ta p.

m

it up for 50Hz/208v. I don't need 14kW and figure 50Hz will use a little l ess LP and may increase lifetime. I use generator for mainly charging batt eries when sun isn't shining. My Schumacher 25A/48V chargers seem to be a little less efficient with the reduced voltage/frequency. I was never real ly impressed with them anyway and look forward to the day I list them on Eb ay.

lled apart a large 10kW tape wound transformer. I left the 240v primary in tact and just need to wind secondary.

secondary (Rubadue maybe?) I am also interested in your input on the topo logy. I can go with center-tapped secondary or not. I'm less concerned wi th the efficiency so leaning towards one winding w/o center tap.

er.

s 2 diode losses. A center tap makes less efficient use of the copper but has only one diode loss.

tap.

Enamelled copper makes more sense than any other insulation. Lots in parall el are relatively easy to handle & pack. If you're moving 2.4 or 10kW you n eed to pack that space full of copper.

Ali's cheaper but you'd get higher 'copper losses' with it.

You could lose the diode losses by using a vibrator rectifier, as long as y ou set the timing right & can handle edge events.

Oh - and don't forget that Tungar bulbs have very specific pattern of use r equirements to survive. :)

NT

p for 50Hz/208v. I don't need 14kW and figure 50Hz will use a little less LP and may increase lifetime. I use generator for mainly charging batterie s when sun isn't shining. My Schumacher 25A/48V chargers seem to be a litt le less efficient with the reduced voltage/frequency. I was never really i mpressed with them anyway and look forward to the day I list them on Ebay.

apart a large 10kW tape wound transformer. I left the 240v primary intact and just need to wind secondary.

ondary (Rubadue maybe?) I am also interested in your input on the topology . I can go with center-tapped secondary or not. I'm less concerned with t he efficiency so leaning towards one winding w/o center tap.

ridge ZVS current source down the road. I just need to get something up an d running quick for now before I wear out this new generator.

Thank you all. The tape wound core needs many turns to keep it quiet, but there are still acres of room left for whatever I need. I will go with the center tap design since I have the room. I have some arthritis so my finge rs not so strong to use heavy wire. I will look at the usual magnet wire to wind.

regards, Bob N9NEO