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Old 29th Mar 2023, 8:03 pm   #6
kalee20
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Join Date: Feb 2007
Location: Lynton, N. Devon, UK.
Posts: 7,059
Default Re: PSUD2 versus Schade's Curves

Quote:
Originally Posted by ms660 View Post
PSUD2:

Reservoir capacitor ripple voltage percentage = 3.99%

RMS rectifier anode current = 0.1888 Amps

Rectifier anode supply VA = 45.31


Schades Curves:

Reservoir capacitor ripple voltage percentage = 4.2% (approx.)

RMS rectifier anode current = 0.198 Amps (approx.)

Rectifier anode supply VA = 47.52 (approx.)
It's pretty good agreement between the two!

I wanted 315V at 90mA some years ago... I decided on a 5Z4 rectifier and designed the transformer to suit, using Schade's curves, making a few assumptions such as winding resistance etc to start off.

Going round calculations at least one further time (might have been two) to refine turns, winding resistance, etc... I ended up with a transformer design.

Making it, connecting rectifier, reservoir cap, dummy load, input via Variac to set to exactly 240V, I measured DC output voltage.

318V.

Just over 1% different from desired.
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