Guru
Joined: 13/10/2014
Location: AustraliaPosts: 2039
| Posted: 02:17am 17 Jan 2023 |
Thanks for all this great in depth insight, love this forum.
Just had to try the inverter before lunch after just getting it connected to the Batteries.
I used a variac to drive a hot air gun on high, I know, only a restive load, but one step at a time.
I monitored the waveforms into the primary, the AC output and measured DC input current and AC volts.
I was looking for any sign of saturation as I had to unwind the existing 250V secondary and use the 230v [was primary] as my test secondary. sticker said 2000VA.
However the AC out never moved from 221vac, everything appeared to be virtually silent, it was hard to tell though as the dam hot air gun was loud.
There was a slight warmth from the Toriod after a minute or so, everything else was cold, including the choke and the high side heatsink.
No good showing the AC waveform at 1600 watts as it's exactly the same from no load to 1.6kw. That was the last waveform I showed a few posts back, it just looked like it was on freeze frame.
Edited 2023-01-17 12:18 by KeepIS