Thanks for letting me know about the other channel, it was in Japanese, but I should have done the decent thing and waved Google Translate over it, apologies.
I've keyed your schematic into PSUD2 and I'm getting exactly the same results. I tried it in (the unreleased) PSUD3 and it's giving 10V more and a "thump" at the start. So there's a problem in PSUD2. If you simulate PSUD2 for about 10-20mS it shows a substantial amount of dithering so the simplified model is getting confused.
Here's what PSUD3 shows:
Here's the bump at the start in more detail:
By increasing the transformer off-load voltage to 260V which is a typical value (base + 8%) it will give 257-258V output. However, the results are still low on PSUD2, here's the dithering at the start of the simulation I mentioned earlier - a sure sign that it's struggling to do the calculations:
Conclusion: PSUD2 has some holes in the simulator and they are showing up on the schematic you keyed in. There's no bug fix that I can apply as the PSUD2 simulator engine is broken as designed. I'll put a beta of PSUD3 out on here about 2nd / 3rd week in August; being a beta it will probably have a few issues of it's own but at least it's accurate and any issues that are found should be fixable.
Regards,
Duncan
