Guru
Joined: 21/06/2018
Location: AustraliaPosts: 1307
| Posted: 08:48am 22 May 2019 |
Thanks Andrew I guess I'm just disappointed that I might still have to wind something for 8 - 10kW - was hoping I had dodged that bullet. It was easy to figure out that he didn't know what he was selling - and I had a fair idea what I was getting, but I had just hoped he was right....
The data from the transformer testing is posted below.
2019-05-22_183627_Toroidal_Performance_Data.pdf
Later as an experiment I put one diode in series with the mains and 3 in series inverse parallel to the first diode. I wanted to introduce a dc offset to see what happens if the two halves of the sinusoid are not exactly equal. it gave some interesting results that I dont fully understand.
I used the Aerosharp transformer.
At 57V in the current measured 66mA - more than at 250V without the diodes offset.
At 102V in the current was 240mA and peaked at times at 1.2A at turn on.
The surprising part was the true power was only 4.4W - I was expecting ~10 times that.
So we have heavy circulating currents but little power being used (absorbed) - I expected driving the transformer towards saturation would have been more wasted power than I experienced.
I look forward to professor Warps take on all of this - over to you Tony !
If at first you dont succeed, I suggest you avoid sky diving....
Cheers Mike