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Old 16th January 2011, 05:56 PM   #1
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Default Duncan Amps PSU Designer II

Greetings everyone,
So, why is it, with a 440V secondary with a resistance of 31 ohms into a bridge, with just a 220U cap and the "standard" 5K load, do I get 473vdc and then if I uncheck soft start I get 584vdc.Which of these is correct?

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Old 16th January 2011, 06:03 PM   #2
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584V is much nearer the real output.

To take account of the soft start, increase the simulation time to 10s, or even more, until the output remains flat.
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Old 17th January 2011, 05:23 AM   #3
Sheldon is offline Sheldon  United States
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Location: San Diego
Soft start adds about 1/2 second to the rise time. Total time to reach steady state depends capacitance and serial resistance. I don't think you'll need 10 seconds, but it won't hurt to try it, then you'll know how much you need to see the output.

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