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Rectifier leak PSUD
Rectifier leak PSUD
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Old 31st December 2017, 03:49 PM   #1
mr ed is offline mr ed  United States
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Default Rectifier leak PSUD

Any one know what the setting in options menu for PSUD2 for rectifier leak pertain to?
How do I determine what to use?

Thanks
Ed
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Old 31st December 2017, 10:12 PM   #2
trobbins is offline trobbins  Australia
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From the Help section:

Menu
Use the mouse or keyboard to select items from the menu:

Options menu
Options | Rectifier leak Allows various reverse leakage resistances to be dialled in. This is helpful for getting rid of kickback on choke input power supplies.

So it adds a resistance across the diode (not a standard parameter in the diode model). In numerical simulations, there is often a need for some resistive path between nodes. If you want to use a non-default value, then change it and compare waveform results and important calculation values of interest to you so that you can appreciate the sensitivity of that optional value.

Last edited by trobbins; 31st December 2017 at 10:16 PM.
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Old 1st January 2018, 12:14 AM   #3
mr ed is offline mr ed  United States
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Thanks for reply,
I had planned a snubber betwwen transformer and rectifier tube but did not now how to sim, this makes sence

Cheers
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Old 1st January 2018, 02:50 AM   #4
trobbins is offline trobbins  Australia
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PSUD2 would not be appropriate for any form of snubber assessment. The calculation engine is simplified, compared to say LTSpice, and doesn't allow an RC or even a C between transformer and diodes, and doesn't model the leakage inductances within the transformer (ie. the reason for snubbering). Any high frequency waveform responses plotted in PSUD2 need to be viewed with caution.

I can recommend you work through the Quasimodo threads if your aim is to pursue simulating snubber performance.
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