Locked
Re: lowering my secondary transformer output voltage
Hi Mark,
It will lower the output voltage and will also make the regulation worse.
It's not something that PSUD currently models and isn't likely to be on the roadmap for the future, so not something I can really help with here. As a suggestion, you might be best to ask in the area where discussions on power supply topology come up frequently.
Regards,
Duncan
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Locked
lowering my secondary transformer output voltage
will adding a resistor in line with the center tap?to ground lower my secondary output voltage
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Re: broken links? databases which do exist and other woes
Hi Duncan,
My error as I looked in C:\Users\...\AppData\Roaming\ psud2
and it only had the rectifiers.txt file.
Never thought to look in the old 'psud' folder ?
Thanks,
- Ian
On 6/12/2024 10:33, Duncan Munro wrote:
toggle quoted message
Show quoted text
On Wed, Jun 12, 2024 at 08:51 AM, Ian Eales wrote:
Diodes now have their own individual files in the
program folder
e.g. C:\Program Files (x86)\PSU Designer II\rectifiers
Hi Ian,
The rectifier files (under Windows) are stored in the Appdata
folder which can be found at
C:\Users\<username>\AppData\Roaming\psud\rectifiers
As per the help file + video, this is the place where changes
should be made as this is where the software will load the files
from when it starts up.
If you found some in the program files folder, they are shipped
with the software to create a set of rectifiers under Appdata if
none exist already, i.e. on a first install (they have to
come from somewhere, so PSUD copies them across). The software
won't read them at a later date so changes to them will be futile.
Regards,
Duncan
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Re: broken links? databases which do exist and other woes
On Wed, Jun 12, 2024 at 08:51 AM, Ian Eales wrote:
Diodes now have their own individual files in the program folder
e.g. C:\Program Files (x86)\PSU Designer II\rectifiers
Hi Ian, The rectifier files (under Windows) are stored in the Appdata folder which can be found at C:\Users\<username>\AppData\Roaming\psud\rectifiers As per the help file + video, this is the place where changes should be made as this is where the software will load the files from when it starts up. If you found some in the program files folder, they are shipped with the software to create a set of rectifiers under Appdata if none exist already, i.e. on a first install (they have to come from somewhere, so PSUD copies them across). The software won't read them at a later date so changes to them will be futile. Regards, Duncan
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Re: broken links? databases which do exist and other woes
I now find I can not use PSUD to model the silicon diodes I had intended (Hexfreds as it happens) ~ since the rectifier list does indeed appear MIA and groups host shows no such thing as a database
Hi, How to model and add new rectifiers was last addressed about a week ago in the following message: /g/duncanampspsud/message/304
To be fair, the rectifier list (rectifiers.txt) isn't MIA, it was deliberately removed over 4 years ago. This was covered along with the reasons a few days ago in a subsequent message: /g/duncanampspsud/message/308You should be able to use the HEXFRED rectifiers that were shared by jrussell_88 on June 10th, it's a case of pasting the xml data provided into a text file as per the instructions in the help file or the worked examples in the video (linked in message 304 above). I think that should solve things, but please let me know if I've missed anything. Regards, Duncan
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Re: broken links? databases which do exist and other woes
Diodes now have their own individual files in the program folder
e.g. C:\Program Files (x86)\PSU Designer II\rectifiers
example HFA25PB60.rect file - may be different on a mac
<?xml version="1.0" encoding="UTF-8"?>
<rectifier>
?? ?<name>HFA25PB60</name>
?? ?<description>fast 25A soft-recovery
diode</description>
?? ?<version>211</version>
?? ?<creationdate>2024-02-25 21:39:00</creationdate>
?? ?<type>SS</type>
?? ?<vlaw>2.11</vlaw>
?? ?<vfac>4.5</vfac>
?? ?<dres>0.01</dres>
?? ?<vpiv>2000</vpiv>
?? ?<ipks>225</ipks>
?? ?<ipkr>100</ipkr>
</rectifier>
- Ian
On 6/12/2024 05:25, neutron51493 via
groups.io wrote:
toggle quoted message
Show quoted text
[Edited Message Follows]
[Reason: which do not exist]
Since foolishly embarking on the now long-deleted (Walton)
published SE design (I was and am on a very restricted budget...)
over a decade ago only to find some of the major (i.e. very
expensive!) components (Plitron chokes) were no longer available,
I turned to the internet for help to redesign and found, among
really very few other resources... PSUD2.? Hey! I thought with
this help I would possibly ditch the valve rectifier and go with
silicon. But that was then...
I have never really been able to get to grips with PSUD2 (I have
build 77) and having an intel MacBook didn't help either until
some kind soul showed me how to insert filter sections.? Yeah
basic stuff - as others have sagely observed: when you don't know
- you don't know.? What to look out for has always been
the issue: e.g. just what influence do those asymmetic chopped off
sinusoidal 100mS current traces in C1 really have?? Can I (should
I?) get rid of them?? So, I sequentially change C1 or C2... Cn or
L1... Ln - and observe whether that makes a 'good' diffierence and
then I look at what happens out to 10,000mS after a reporting
delay of x ~ but what does all that mean?? The variables are
dynamic and there seems no way of knowing what is good enough.
I now find I can not use PSUD to model the silicon diodes I had
intended (Hexfreds as it happens) ~ since the rectifier list does
indeed appear MIA and groups host shows no such thing as a
database... therefore I could not find the recent information on
the recently group post concerning another contibutor's Hexfreds anywhere.
? As a former Chemist a mathematical method for enumerating Vfac
and Vlaw such as simultaneous logarithmic equations has not been
the issue for me. - no, what I am struggling to say is really how
to use PSUD.? A cursory glance at more modern PSU schema
(such as by Dipl. Ing. Jac van de Walle ()
and using serially connected choke for improved common mode
rejection - shows a plethera of different approaches but I have
not attempted to model these on PSUD.
Please do not "get me wrong,"? PSUD is clearly a very GREAT
project one which has clearly taken a great deal of time and
specialist expertise - I only wish there was as great a guide to
its use.
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broken links? databases which do exist and other woes
Since foolishly embarking on the now long-deleted (Walton) published SE design (I was and am on a very restricted budget...) over a decade ago only to find some of the major (i.e. very expensive!) components (Plitron chokes) were no longer available, I turned to the internet for help to redesign and found, among really very few other resources... PSUD2.? Hey! I thought with this help I would possibly ditch the valve rectifier and go with silicon. But that was then...
I have never really been able to get to grips with PSUD2 (I have build 77) and having an intel MacBook didn't help either until some kind soul showed me how to insert filter sections.? Yeah basic stuff - as others have sagely observed: when you don't know - you don't know.? What to look out for has always been the issue: e.g. just what influence do those asymmetic chopped off sinusoidal 100mS current traces in C1 really have?? Can I (should I?) get rid of them?? So, I sequentially change C1 or C2... Cn or L1... Ln - and observe whether that makes a 'good' diffierence and then I look at what happens out to 10,000mS after a reporting delay of x ~ but what does all that mean?? The variables are dynamic and there seems no way of knowing what is good enough.
I now find I can not use PSUD to model the silicon diodes I had intended (Hexfreds as it happens) ~ since the rectifier list does indeed appear MIA and groups host shows no such thing as a database... therefore I could not find the recent information on the recently group post concerning another contibutor's Hexfreds anywhere. ? As a former Chemist a mathematical method for enumerating Vfac and Vlaw such as simultaneous logarithmic equations has not been the issue for me. - no, what I am struggling to say is really how to use PSUD.? A cursory glance at more modern PSU schema (such as by Dipl. Ing. Jac van de Walle () and using serially connected choke for improved common mode rejection - shows a plethera of different approaches but I have not attempted to model these on PSUD.
Please do not "get me wrong,"? PSUD is clearly a very GREAT project one which has clearly taken a great deal of time and specialist expertise - I only wish there was as great a guide to its use.
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I used the rectifier database: and list: ? which were accessible a week or so ago,? but are no longer working. At the time, I didn't look at the 'Download' page on your old site which explains the current situation and links to this site.? I added a couple of diodes to my own list of rectifiers - in case these are of interest to anyone else... HFA25PB60.rect is an International Rectifiers fast 25A soft-recovery diode
<?xml version="1.0" encoding="UTF-8"?><rectifier>? <name>HFA25PB60</name>? <description>HFA25PB60</description>? <version>211</version>? <creationdate>2024-02-25 21:39:00</creationdate>? <type>SS</type>? <vlaw>2.11</vlaw>? <vfac>4.5</vfac>? <dres>0.01</dres>? <vpiv>2000</vpiv>? <ipks>225</ipks>? <ipkr>100</ipkr></rectifier>
LQA16T300.rect is a fast 16A Power Integrations diode which should obviate the need for snubbers?
<?xml version="1.0" encoding="UTF-8"?><rectifier>? <name>LQA16T300</name>? <description>LQA16T300</description>? <version>211</version>? <creationdate>2024-06-05 00:00:00</creationdate>? <type>SS</type>? <vlaw>4.577</vlaw>? <vfac>1.742</vfac>? <dres>0.00126</dres>? <vpiv>300</vpiv>? <ipks>100</ipks>? <ipkr>16</ipkr></rectifier>
J
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MacOS workaround for rectifier files "Access Violation"
For the past year (or more!) I've been getting an error message when I try to run PSUD2 -- MacOS reports an access violation and the program won't load.
After reading about how the rectifier file is named and located in Windows, I found the PSUD2 rectifier files in my Documents folder. ?However, the PSUD2 folder was in iCloud Drive -- not actually on the local machine. ?After clicking the iCloud icon, which downloads the folder to the local machine, PSUD2 now works just fine.
The MacOS error (access violation) occurs despite giving PSUD2 "Full Disk Access." ?Not sure how the Documents/PSUD2 folder had been sent to iCloud Drive. ??
I hope this helps.
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On Thu, Jun 6, 2024 at 10:34 AM, <jrussell_88@...> wrote:
I updated the rectifier database, which allowed me to download rectifiers.txt, but does it feed into the new .rect files?
The rectifier database is no longer used as it became a free for all and got filled with junk which didn't make sense and crashed PSUD2. Equally the rectifiers.txt file is no longer used and hasn't been for some years as per my previous reply -> /g/duncanampspsud/message/304
Not sure what you mean when you say updated the rectifier database? If you could let me know, that would give me a better idea of what you're trying to do. There is no public rectifier database any more, only a private database of rectifiers which have either been created by me or validated by me. This will, in future, feed into PSUD3 and ensure that the core product has a set of rectifiers which work correctly and don't cause issues. ? Regards, Duncan
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On Thu, Jun 6, 2024 at 10:34 AM, <jrussell_88@...> wrote:
So the answer is that the rectifiers are now in name.rect files, in the rectifiers folder in:
Hide quoted text
?
C:\Users\my_name\AppData\Roaming\psud2\rectifiers where?my_name?is your login name for Windows
Yes, correct. Regards, Duncan
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Thanks!
So the answer is that the rectifiers are now in name.rect files, in the rectifiers folder in:
toggle quoted message
Show quoted text
C:\Users\my_name\AppData\Roaming\psud2\rectifiers where?my_name?is your login name for Windows
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Thanks! So the answer is that the rectifiers are now stored in name.rect XML files:
Rectifier files are stored in your application data normally in the folder C:\Users\my_name\AppData\Roaming\psud2\rectifiers where?my_name?is your login name for Windows.?
I updated the rectifier database, which allowed me to download rectifiers.txt, but does it feed into the new .rect files?
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Hi John,
The old rectifiers.txt file no longer works with PSUD and hasn't for some years, apologies if some parts of the website haven't quite caught up with this yet.
There's a couple of routes you can follow:
1. The help file gives an overview how to do this; Help | Contents | Technical Information | How to add your own rectifier types
2. I did a YouTube video a few years ago which explains how to model new rectifiers and get them into the system. Hopefully the video will give a more detailed explanation on what's needed: Regards
Duncan
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I tried updating rectifiers.txt, and adding a new rectifier online, then downloaded rectifiers.txt without making any difference.
Docs are confusing - I have the current version and release notes say: 'Rectifiers are now stored as XML files for easier sharing and updates. '
If only... How can I add a rectifier
I can't see any xml file with psud2.exe.
Tia
John
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Re: Possible bug? Recovering from deleted load
Thanks for the speedy reply. I've updated the Windows version of the software to build 79 which now addresses this issue and will prevent the keyboard from deleting either the source block at the start or the load block at the end. Thanks again for letting me know about the issue. Files area --> /g/duncanampspsud/files/psud2_windowsRegards, Duncan
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Re: Possible bug? Recovering from deleted load
Had it on both build 75 and 76 windows 11. I did it via keyboard. Select the load section then the 'delete' key on the keyboard.
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Re: Possible bug? Recovering from deleted load
1. Delete the final load node.
2. If you try to 'fix' this by adding a tap to the end it wont be considered a closed circuit
3. Receive error occured access violation
4. No way to recover unless start from fresh
Hi, this is a bit worrying as it shouldn't be possible to delete the power source or the final load! Can you let me know how you carry out the deletion? As I say, it shouldn't be permitted. Also can you let me know which operating system you're using and the version of PSUD, it's in Help | About, thanks. Regards, Duncan
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Possible bug? Recovering from deleted load
Not sure if this is a user error thing or a bug.
Steps to reproduce
1. Delete the final load node.
2. If you try to 'fix' this by adding a tap to the end it wont be considered a closed circuit
3. Receive error occured access violation
4. No way to recover unless start from fresh
thanks!
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Re: Is there a build for M1/M2 Mac?
You did!? Much appreciated but the process did not work and I got busy with another project.
I'm not a software guy, but if anyone knows where the resources are to work through this installation issue, I'd take a stab at it.? LOL, it'd be a real shot in the dark so to speak.
Hi Chris, I did write a reply to you on May 9th over Mac security constraints and the fix - did you get to see it?
/g/duncanampspsud/message/286
Regards,
Duncan
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Ian Eales