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On Mon, 27 Feb 2023 14:21:24 +0000, Fredxx wrote:
On 27/02/2023 11:36, Max Demian wrote:
On 26/02/2023 09:45, Commander Kinsey wrote:
Can I put a diode BEFORE a step up transformer so I can use a lower
voltage diode for half wave rectification?
No, the transformer will turn it back into AC. It responds to /changes/
of current and a half wave will go up and then down resulting in +ve
and -ve from the secondary.
Yer-but, the issue is over the transformer being subject to a DC voltage
which in the case of the OP will be:
230V x sqrt(2) x pi / 2
being developed across the transformer. That will produce a net DC
current in the transformer and make some heat for which the transformer
is not designed.
But you\'re right the secondary, before its imminent failure, will
produce an AC waveform though likely to be a very distorted sine wave.
At half the frequency..
On 27/02/2023 11:36, Max Demian wrote:
On 26/02/2023 09:45, Commander Kinsey wrote:
Can I put a diode BEFORE a step up transformer so I can use a lower
voltage diode for half wave rectification?
No, the transformer will turn it back into AC. It responds to
/changes/ of current and a half wave will go up and then down
resulting in +ve and -ve from the secondary.
The transformer will saturate and burn out
On Mon, 27 Feb 2023 14:21:24 +0000, Fredxx wrote:
On 27/02/2023 11:36, Max Demian wrote:
On 26/02/2023 09:45, Commander Kinsey wrote:
Can I put a diode BEFORE a step up transformer so I can use a lower
voltage diode for half wave rectification?
No, the transformer will turn it back into AC. It responds to /changes/
of current and a half wave will go up and then down resulting in +ve
and -ve from the secondary.
Yer-but, the issue is over the transformer being subject to a DC voltage
which in the case of the OP will be:
230V x sqrt(2) x pi / 2
being developed across the transformer. That will produce a net DC
current in the transformer and make some heat for which the transformer
is not designed.
But you\'re right the secondary, before its imminent failure, will
produce an AC waveform though likely to be a very distorted sine wave.
At half the frequency..
On 27/02/2023 15:29, Smolley wrote:
On Mon, 27 Feb 2023 14:21:24 +0000, Fredxx wrote:
snip
But you\'re right the secondary, before its imminent failure, will
produce an AC waveform though likely to be a very distorted sine wave.
At half the frequency..
No.
Correct.
On Sun, 26 Feb 2023 09:45:26 -0000, \"Commander Kinsey\"
CK1@nospam.com> wrote:
Can I put a diode BEFORE a step up transformer so I can use a lower voltage diode for half wave rectification?
Ah. Humor. Thanks for the laugh.
On Sun, 26 Feb 2023 16:13:19 -0000, John Larkin <jlarkin@highlandsnipmetechnology.com> wrote:
On Sun, 26 Feb 2023 09:45:26 -0000, \"Commander Kinsey\"
CK1@nospam.com> wrote:
Can I put a diode BEFORE a step up transformer so I can use a lower voltage diode for half wave rectification?
Ah. Humor. Thanks for the laugh.
I thought current always flowed the same way in primary and secondary.... You know, phases and all that.
On Sat, 04 Mar 2023 01:23:17 -0000, \"Commander Kinsey\"
C...@nospam.com> wrote:
On Sun, 26 Feb 2023 16:13:19 -0000, John Larkin <jla...@highlandsnipmetechnology.com> wrote:
On Sun, 26 Feb 2023 09:45:26 -0000, \"Commander Kinsey\"
C...@nospam.com> wrote:
Can I put a diode BEFORE a step up transformer so I can use a lower voltage diode for half wave rectification?
Ah. Humor. Thanks for the laugh.
I thought current always flowed the same way in primary and secondary..... You know, phases and all that.
Assume a loaded bifilar transformer, both dots up, and draw the
winding currents.
The reason that loading a transformer doesn\'t make it saturate is
because the primary excitation flux and the flux from the secondary
load current cancel. Loading a transformer reduces the core flux.
I thought current always flowed the same way in primary and secondary.... You know, phases and all that.
Assume a loaded bifilar transformer, both dots up, and draw the
winding currents.
The reason that loading a transformer doesn\'t make it saturate is
because the primary excitation flux and the flux from the secondary
load current cancel. Loading a transformer reduces the core flux.
On Fri, 03 Mar 2023 19:04:07 -0800, John Larkin, another obviously brain
dead, troll-feeding senile asshole, blathered:
I thought current always flowed the same way in primary and secondary..... You know, phases and all that.
Assume a loaded bifilar transformer, both dots up, and draw the
winding currents.
The reason that loading a transformer doesn\'t make it saturate is
because the primary excitation flux and the flux from the secondary
load current cancel. Loading a transformer reduces the core flux.
The reason why the trolling attention whore will keep asking ever more retarded \"questions\" is because you troll-feeding senile assholes will keep answering them.
On Sun, 26 Feb 2023 16:13:19 -0000, John Larkin
jlarkin@highlandsnipmetechnology.com> wrote:
On Sun, 26 Feb 2023 09:45:26 -0000, \"Commander Kinsey\"
CK1@nospam.com> wrote:
Can I put a diode BEFORE a step up transformer so I can use a lower
voltage diode for half wave rectification?
Ah. Humor. Thanks for the laugh.
I thought current always flowed the same way in primary and
secondary.... You know, phases and all that.
On 04/03/2023 01:23, Commander Kinsey wrote:
On Sun, 26 Feb 2023 16:13:19 -0000, John Larkin
jla...@highlandsnipmetechnology.com> wrote:
On Sun, 26 Feb 2023 09:45:26 -0000, \"Commander Kinsey\"
C...@nospam.com> wrote:
Can I put a diode BEFORE a step up transformer so I can use a lower
voltage diode for half wave rectification?
Ah. Humor. Thanks for the laugh.
I thought current always flowed the same way in primary and
secondary.... You know, phases and all that.
You clearly shouldn\'t have anything to do with transformers and diodes.
On 04/03/2023 01:23, Commander Kinsey wrote:
On Sun, 26 Feb 2023 16:13:19 -0000, John Larkin
jlarkin@highlandsnipmetechnology.com> wrote:
On Sun, 26 Feb 2023 09:45:26 -0000, \"Commander Kinsey\"
CK1@nospam.com> wrote:
Can I put a diode BEFORE a step up transformer so I can use a lower
voltage diode for half wave rectification?
Ah. Humor. Thanks for the laugh.
I thought current always flowed the same way in primary and
secondary.... You know, phases and all that.
You clearly shouldn\'t have anything to do with transformers and diodes.
+1
On 04/03/2023 12:16, Max Demian wrote:
On 04/03/2023 01:23, Commander Kinsey wrote:
On Sun, 26 Feb 2023 16:13:19 -0000, John Larkin <jla...@highlandsnipmetechnology.com> wrote:
On Sun, 26 Feb 2023 09:45:26 -0000, \"Commander Kinsey\" <C...@nospam.com> wrote:
\"Socialist governments traditionally do make a financial mess. They
always run out of other people\'s money. It\'s quite a characteristic of them\"
Margaret Thatcher
No.
At least if you are really meaning what you said here.
I\'m assuming this is some kind of mains to low voltage psu.
Surely, putting the rectifier diodes is going to be on the secondary in any
case. Depending on what you want, it can be done several ways. If the
transformer has two ends to the secondary, ie no centre tap, then you need a
bridge rectifier to allow both halves of the ac waveform to be rectified.
If it has a centre tap then you have one rectifier from the ends, ie one
for each and the centre tap as 0V
Or you could use two bridges, isolating the centre tap and get two
supplies.
Lastly, the least efficient way is one half wave rectifier across the
secondary, but then you are only really using one of the cycles of the mains
in effect.
Brian
On Fri, 03 Mar 2023 19:04:07 -0800, John Larkin, another obviously brain
dead, troll-feeding senile asshole, blathered:
I thought current always flowed the same way in primary and secondary.... You know, phases and all that.
Assume a loaded bifilar transformer, both dots up, and draw the
winding currents.
The reason that loading a transformer doesn\'t make it saturate is
because the primary excitation flux and the flux from the secondary
load current cancel. Loading a transformer reduces the core flux.
The reason why the trolling attention whore will keep asking ever more
retarded \"questions\" is because you troll-feeding senile assholes will keep
answering them.
On 04/03/2023 01:23, Commander Kinsey wrote:
On Sun, 26 Feb 2023 16:13:19 -0000, John Larkin
jlarkin@highlandsnipmetechnology.com> wrote:
On Sun, 26 Feb 2023 09:45:26 -0000, \"Commander Kinsey\"
CK1@nospam.com> wrote:
Can I put a diode BEFORE a step up transformer so I can use a lower
voltage diode for half wave rectification?
Ah. Humor. Thanks for the laugh.
I thought current always flowed the same way in primary and
secondary.... You know, phases and all that.
You clearly shouldn\'t have anything to do with transformers and diodes.
I was actually talking about a stepup transformer. 120V to 6000V. Yes
it\'s American, I got it cheap. To avoid finding a 6000V diode, I
thought I could use a 120V diode. From all the answers it appears I was
wrong to assume because the current is going one way through the primary
it must be going the same way through the secondary. Actually the DC
component is lost and the AC is passed, so I just get squint AC.
The prime function of SED is to discuss electronics design, and
another is to help people who have questions or don\'t understand
everything or who want to play with ideas.
If you stop being mindlessly nasty and think about electronics, and
try to be helpful, you\'ll be better off. But you are trapped in
meanness and can\'t break out.
Sloman is similarly trapped. So says absurd things about the topic,
just to be contradictory.