24V to 500-1000V, 20W floating DC-DC converter...

[Bill Sloman]

On Thursday, July 23, 2020 at 11:58:56 PM UTC+10, jla...@highlandsniptechnology.com wrote:

On Thu, 23 Jul 2020 00:37:09 -0400, bitrex <user@example.net> wrote:

On 7/22/2020 10:01 PM, jlarkin@highlandsniptechnology.com wrote:
On Wed, 22 Jul 2020 19:18:54 -0400, bitrex <user@example.net> wrote:

On 7/22/2020 5:23 PM, John Larkin wrote:
On Wed, 22 Jul 2020 12:24:10 -0400, bitrex <user@example.net> wrote:

On 7/22/2020 10:21 AM, George Herold wrote:
On Tuesday, July 21, 2020 at 6:51:49 PM UTC-4, Matt B wrote:

<snip>

The Thor rocket was just sort of a scaled-up kerosene burning V2:

https://www.youtube.com/watch?v=WYrrVHPur2Y

OK, my bad. It would be really hard for you.

Mooom, Mr. Larkin\'s trying to peer pressure me again. He say he\'s bad!

Peer?

John Larkin makes more money out of slapping together electronics than the rest of us, which - in his eyes - makes him some kind of aristocrat.

Any pressure he applies is from a position of social superiority - at least given his ideas about how this particular society ought to operate.

Peer pressure is applied by your social equals. Narcissists expect other people to admire them quite a much as they admire themselves, and any shortfall in that admiration is insulting. He does complain about being insulted by anything less than fulsome flattery.

--
Bill Sloman, Sydney

--
Bill Sloman, Sydney

 

[Bill Sloman]

On Thursday, July 23, 2020 at 11:58:56 PM UTC+10, jla...@highlandsniptechnology.com wrote:

On Thu, 23 Jul 2020 00:37:09 -0400, bitrex <user@example.net> wrote:

On 7/22/2020 10:01 PM, jlarkin@highlandsniptechnology.com wrote:
On Wed, 22 Jul 2020 19:18:54 -0400, bitrex <user@example.net> wrote:

On 7/22/2020 5:23 PM, John Larkin wrote:
On Wed, 22 Jul 2020 12:24:10 -0400, bitrex <user@example.net> wrote:

On 7/22/2020 10:21 AM, George Herold wrote:
On Tuesday, July 21, 2020 at 6:51:49 PM UTC-4, Matt B wrote:

<snip>

The Thor rocket was just sort of a scaled-up kerosene burning V2:

https://www.youtube.com/watch?v=WYrrVHPur2Y

OK, my bad. It would be really hard for you.

Mooom, Mr. Larkin\'s trying to peer pressure me again. He say he\'s bad!

Peer?

John Larkin makes more money out of slapping together electronics than the rest of us, which - in his eyes - makes him some kind of aristocrat.

Any pressure he applies is from a position of social superiority - at least given his ideas about how this particular society ought to operate.

Peer pressure is applied by your social equals. Narcissists expect other people to admire them quite a much as they admire themselves, and any shortfall in that admiration is insulting. He does complain about being insulted by anything less than fulsome flattery.

--
Bill Sloman, Sydney

--
Bill Sloman, Sydney

 

[bitrex]

On 7/23/2020 9:58 AM, jlarkin@highlandsniptechnology.com wrote:

On Thu, 23 Jul 2020 00:37:09 -0400, bitrex <user@example.net> wrote:

On 7/22/2020 10:01 PM, jlarkin@highlandsniptechnology.com wrote:
On Wed, 22 Jul 2020 19:18:54 -0400, bitrex <user@example.net> wrote:

On 7/22/2020 5:23 PM, John Larkin wrote:
On Wed, 22 Jul 2020 12:24:10 -0400, bitrex <user@example.net> wrote:

On 7/22/2020 10:21 AM, George Herold wrote:
On Tuesday, July 21, 2020 at 6:51:49 PM UTC-4, Matt B wrote:
I need to make a 24V to 500-1000V, 20W adjustable power supply for a pulser. It needs to be a floating or negative converter.

My specs are:
Input: 24-28V
Output voltage: 500-1000V adjustable via control signal
Output current: 10mA @ 500V (5W), 20mA @ 1000V (20W)

I\'ve been reading through threads on different HV designs. So far the only one I\'ve come across that is isolated is Figure 50 of LT Application Note 29 (https://www.analog.com/media/en/technical-documentation/application-notes/an29f.pdf). It is specified for 1000V, 5W so not beefy enough. The transformer is also obsolete, but this comment mentions potential replacements. https://groups.google.com/d/msg/sci.electronics.design/F120QpxWWkc/74ljdPZ_BQAJ

There\'s also this design (https://www.edn.com/1-kv-power-supply-produces-a-continuous-arc/) that is 1kV, 20W. I just don\'t know enough about making it adjustable and isolated.

Thoughts on how to proceed?

If you are going to try building it yourself, then I\'d start with the
500V 5 mA one first. I built my first flyback with the LT3083,

(2018... thread here
https://groups.google.com/forum/?fromgroups=&hl=en#!searchin/sci.electronics.design/my$20first$20flyback%7Csort:date/sci.electronics.design/FQAIY1VaYBY/mLvGKJC2AgAJ

Good luck. Oh buying a ready made HV supply would be a good thing.
Gives you something to compare to if/when you have problems putting
to whole system together.

George H.


Yep. OP did not like that I disparaged/was skeptical of his plan to
build a 20 watt 1000 volt converter out of the gate but it strikes me as
a certain kind of madness as a first project if OP has not designed and
built a flyback of any type before.

Just different numbers. Shouldn\'t be really hard.


The Thor rocket was just sort of a scaled-up kerosene burning V2:

https://www.youtube.com/watch?v=WYrrVHPur2Y


OK, my bad. It would be really hard for you.




Mooom, Mr. Larkin\'s trying to peer pressure me again. He say he\'s bad!


Peer?

Sometimes I find the best way to, say, get a friend a second opinion on
her car accident situation on the social media for example. Look at the
pictures. Say \"Sigh, yep, looks like $6000 worth of damage to me. Maybe
$7000. I think they\'re probably going to rule that a total loss..\"

then you wait a little bit. And another man (almost always a man) will
come around and say \"Nah idiot. That\'s no more than $3000 in damage.
Actually I worked for the insurance industry for 8 years and DO know
what I\'m talking about, unlike you.\"

\"No way that\'s not a total loss.\"

\"Oh I beg to differ!\"

\"There is definitely, no way, that you could provide an itemized
assessment of all the damage to that car and what you believe the repair
costs should be and have that on my friend\'s desk by tomorrow morning.\"

\"PFft! I could do it in my sleep.\" \"Oh yeah?\" \"Yeah, punk.\" \"OK. Well
get on it.\" \"Right. I\'ll show you.\"

I am studying managerial techniques

 

[bitrex]

On 7/23/2020 9:58 AM, jlarkin@highlandsniptechnology.com wrote:

On Thu, 23 Jul 2020 00:37:09 -0400, bitrex <user@example.net> wrote:

On 7/22/2020 10:01 PM, jlarkin@highlandsniptechnology.com wrote:
On Wed, 22 Jul 2020 19:18:54 -0400, bitrex <user@example.net> wrote:

On 7/22/2020 5:23 PM, John Larkin wrote:
On Wed, 22 Jul 2020 12:24:10 -0400, bitrex <user@example.net> wrote:

On 7/22/2020 10:21 AM, George Herold wrote:
On Tuesday, July 21, 2020 at 6:51:49 PM UTC-4, Matt B wrote:
I need to make a 24V to 500-1000V, 20W adjustable power supply for a pulser. It needs to be a floating or negative converter.

My specs are:
Input: 24-28V
Output voltage: 500-1000V adjustable via control signal
Output current: 10mA @ 500V (5W), 20mA @ 1000V (20W)

I\'ve been reading through threads on different HV designs. So far the only one I\'ve come across that is isolated is Figure 50 of LT Application Note 29 (https://www.analog.com/media/en/technical-documentation/application-notes/an29f.pdf). It is specified for 1000V, 5W so not beefy enough. The transformer is also obsolete, but this comment mentions potential replacements. https://groups.google.com/d/msg/sci.electronics.design/F120QpxWWkc/74ljdPZ_BQAJ

There\'s also this design (https://www.edn.com/1-kv-power-supply-produces-a-continuous-arc/) that is 1kV, 20W. I just don\'t know enough about making it adjustable and isolated.

Thoughts on how to proceed?

If you are going to try building it yourself, then I\'d start with the
500V 5 mA one first. I built my first flyback with the LT3083,

(2018... thread here
https://groups.google.com/forum/?fromgroups=&hl=en#!searchin/sci.electronics.design/my$20first$20flyback%7Csort:date/sci.electronics.design/FQAIY1VaYBY/mLvGKJC2AgAJ

Good luck. Oh buying a ready made HV supply would be a good thing.
Gives you something to compare to if/when you have problems putting
to whole system together.

George H.


Yep. OP did not like that I disparaged/was skeptical of his plan to
build a 20 watt 1000 volt converter out of the gate but it strikes me as
a certain kind of madness as a first project if OP has not designed and
built a flyback of any type before.

Just different numbers. Shouldn\'t be really hard.


The Thor rocket was just sort of a scaled-up kerosene burning V2:

https://www.youtube.com/watch?v=WYrrVHPur2Y


OK, my bad. It would be really hard for you.




Mooom, Mr. Larkin\'s trying to peer pressure me again. He say he\'s bad!


Peer?

Sometimes I find the best way to, say, get a friend a second opinion on
her car accident situation on the social media for example. Look at the
pictures. Say \"Sigh, yep, looks like $6000 worth of damage to me. Maybe
$7000. I think they\'re probably going to rule that a total loss..\"

then you wait a little bit. And another man (almost always a man) will
come around and say \"Nah idiot. That\'s no more than $3000 in damage.
Actually I worked for the insurance industry for 8 years and DO know
what I\'m talking about, unlike you.\"

\"No way that\'s not a total loss.\"

\"Oh I beg to differ!\"

\"There is definitely, no way, that you could provide an itemized
assessment of all the damage to that car and what you believe the repair
costs should be and have that on my friend\'s desk by tomorrow morning.\"

\"PFft! I could do it in my sleep.\" \"Oh yeah?\" \"Yeah, punk.\" \"OK. Well
get on it.\" \"Right. I\'ll show you.\"

I am studying managerial techniques

 

[bitrex]

On 7/23/2020 9:58 AM, jlarkin@highlandsniptechnology.com wrote:

On Thu, 23 Jul 2020 00:37:09 -0400, bitrex <user@example.net> wrote:

On 7/22/2020 10:01 PM, jlarkin@highlandsniptechnology.com wrote:
On Wed, 22 Jul 2020 19:18:54 -0400, bitrex <user@example.net> wrote:

On 7/22/2020 5:23 PM, John Larkin wrote:
On Wed, 22 Jul 2020 12:24:10 -0400, bitrex <user@example.net> wrote:

On 7/22/2020 10:21 AM, George Herold wrote:
On Tuesday, July 21, 2020 at 6:51:49 PM UTC-4, Matt B wrote:
I need to make a 24V to 500-1000V, 20W adjustable power supply for a pulser. It needs to be a floating or negative converter.

My specs are:
Input: 24-28V
Output voltage: 500-1000V adjustable via control signal
Output current: 10mA @ 500V (5W), 20mA @ 1000V (20W)

I\'ve been reading through threads on different HV designs. So far the only one I\'ve come across that is isolated is Figure 50 of LT Application Note 29 (https://www.analog.com/media/en/technical-documentation/application-notes/an29f.pdf). It is specified for 1000V, 5W so not beefy enough. The transformer is also obsolete, but this comment mentions potential replacements. https://groups.google.com/d/msg/sci.electronics.design/F120QpxWWkc/74ljdPZ_BQAJ

There\'s also this design (https://www.edn.com/1-kv-power-supply-produces-a-continuous-arc/) that is 1kV, 20W. I just don\'t know enough about making it adjustable and isolated.

Thoughts on how to proceed?

If you are going to try building it yourself, then I\'d start with the
500V 5 mA one first. I built my first flyback with the LT3083,

(2018... thread here
https://groups.google.com/forum/?fromgroups=&hl=en#!searchin/sci.electronics.design/my$20first$20flyback%7Csort:date/sci.electronics.design/FQAIY1VaYBY/mLvGKJC2AgAJ

Good luck. Oh buying a ready made HV supply would be a good thing.
Gives you something to compare to if/when you have problems putting
to whole system together.

George H.


Yep. OP did not like that I disparaged/was skeptical of his plan to
build a 20 watt 1000 volt converter out of the gate but it strikes me as
a certain kind of madness as a first project if OP has not designed and
built a flyback of any type before.

Just different numbers. Shouldn\'t be really hard.


The Thor rocket was just sort of a scaled-up kerosene burning V2:

https://www.youtube.com/watch?v=WYrrVHPur2Y


OK, my bad. It would be really hard for you.




Mooom, Mr. Larkin\'s trying to peer pressure me again. He say he\'s bad!


Peer?

Sometimes I find the best way to, say, get a friend a second opinion on
her car accident situation on the social media for example. Look at the
pictures. Say \"Sigh, yep, looks like $6000 worth of damage to me. Maybe
$7000. I think they\'re probably going to rule that a total loss..\"

then you wait a little bit. And another man (almost always a man) will
come around and say \"Nah idiot. That\'s no more than $3000 in damage.
Actually I worked for the insurance industry for 8 years and DO know
what I\'m talking about, unlike you.\"

\"No way that\'s not a total loss.\"

\"Oh I beg to differ!\"

\"There is definitely, no way, that you could provide an itemized
assessment of all the damage to that car and what you believe the repair
costs should be and have that on my friend\'s desk by tomorrow morning.\"

\"PFft! I could do it in my sleep.\" \"Oh yeah?\" \"Yeah, punk.\" \"OK. Well
get on it.\" \"Right. I\'ll show you.\"

I am studying managerial techniques

 

[server]

On Thu, 23 Jul 2020 11:14:20 -0400, bitrex <user@example.net> wrote:

On 7/23/2020 9:58 AM, jlarkin@highlandsniptechnology.com wrote:
On Thu, 23 Jul 2020 00:37:09 -0400, bitrex <user@example.net> wrote:

On 7/22/2020 10:01 PM, jlarkin@highlandsniptechnology.com wrote:
On Wed, 22 Jul 2020 19:18:54 -0400, bitrex <user@example.net> wrote:

On 7/22/2020 5:23 PM, John Larkin wrote:
On Wed, 22 Jul 2020 12:24:10 -0400, bitrex <user@example.net> wrote:

On 7/22/2020 10:21 AM, George Herold wrote:
On Tuesday, July 21, 2020 at 6:51:49 PM UTC-4, Matt B wrote:
I need to make a 24V to 500-1000V, 20W adjustable power supply for a pulser. It needs to be a floating or negative converter.

My specs are:
Input: 24-28V
Output voltage: 500-1000V adjustable via control signal
Output current: 10mA @ 500V (5W), 20mA @ 1000V (20W)

I\'ve been reading through threads on different HV designs. So far the only one I\'ve come across that is isolated is Figure 50 of LT Application Note 29 (https://www.analog.com/media/en/technical-documentation/application-notes/an29f.pdf). It is specified for 1000V, 5W so not beefy enough. The transformer is also obsolete, but this comment mentions potential replacements. https://groups.google.com/d/msg/sci.electronics.design/F120QpxWWkc/74ljdPZ_BQAJ

There\'s also this design (https://www.edn.com/1-kv-power-supply-produces-a-continuous-arc/) that is 1kV, 20W. I just don\'t know enough about making it adjustable and isolated.

Thoughts on how to proceed?

If you are going to try building it yourself, then I\'d start with the
500V 5 mA one first. I built my first flyback with the LT3083,

(2018... thread here
https://groups.google.com/forum/?fromgroups=&hl=en#!searchin/sci.electronics.design/my$20first$20flyback%7Csort:date/sci.electronics.design/FQAIY1VaYBY/mLvGKJC2AgAJ

Good luck. Oh buying a ready made HV supply would be a good thing.
Gives you something to compare to if/when you have problems putting
to whole system together.

George H.


Yep. OP did not like that I disparaged/was skeptical of his plan to
build a 20 watt 1000 volt converter out of the gate but it strikes me as
a certain kind of madness as a first project if OP has not designed and
built a flyback of any type before.

Just different numbers. Shouldn\'t be really hard.


The Thor rocket was just sort of a scaled-up kerosene burning V2:

https://www.youtube.com/watch?v=WYrrVHPur2Y


OK, my bad. It would be really hard for you.




Mooom, Mr. Larkin\'s trying to peer pressure me again. He say he\'s bad!


Peer?




Sometimes I find the best way to, say, get a friend a second opinion on
her car accident situation on the social media for example. Look at the
pictures. Say \"Sigh, yep, looks like $6000 worth of damage to me. Maybe
$7000. I think they\'re probably going to rule that a total loss..\"

then you wait a little bit. And another man (almost always a man) will
come around and say \"Nah idiot. That\'s no more than $3000 in damage.
Actually I worked for the insurance industry for 8 years and DO know
what I\'m talking about, unlike you.\"

\"No way that\'s not a total loss.\"

\"Oh I beg to differ!\"

\"There is definitely, no way, that you could provide an itemized
assessment of all the damage to that car and what you believe the repair
costs should be and have that on my friend\'s desk by tomorrow morning.\"

\"PFft! I could do it in my sleep.\" \"Oh yeah?\" \"Yeah, punk.\" \"OK. Well
get on it.\" \"Right. I\'ll show you.\"

I am studying managerial techniques

If your contribution to an electronic design forum is to tell
obviously intelligent people that they shouldn\'t try to design
electronics, management is your destiny. You can write long memos just
like the blather above.

A 1KV, 20 watt flyback wouldn\'t be difficult, except to people who are
afraid to do it.



--

John Larkin Highland Technology, Inc

Science teaches us to doubt.

Claude Bernard

 

[server]

On Thu, 23 Jul 2020 11:14:20 -0400, bitrex <user@example.net> wrote:

On 7/23/2020 9:58 AM, jlarkin@highlandsniptechnology.com wrote:
On Thu, 23 Jul 2020 00:37:09 -0400, bitrex <user@example.net> wrote:

On 7/22/2020 10:01 PM, jlarkin@highlandsniptechnology.com wrote:
On Wed, 22 Jul 2020 19:18:54 -0400, bitrex <user@example.net> wrote:

On 7/22/2020 5:23 PM, John Larkin wrote:
On Wed, 22 Jul 2020 12:24:10 -0400, bitrex <user@example.net> wrote:

On 7/22/2020 10:21 AM, George Herold wrote:
On Tuesday, July 21, 2020 at 6:51:49 PM UTC-4, Matt B wrote:
I need to make a 24V to 500-1000V, 20W adjustable power supply for a pulser. It needs to be a floating or negative converter.

My specs are:
Input: 24-28V
Output voltage: 500-1000V adjustable via control signal
Output current: 10mA @ 500V (5W), 20mA @ 1000V (20W)

I\'ve been reading through threads on different HV designs. So far the only one I\'ve come across that is isolated is Figure 50 of LT Application Note 29 (https://www.analog.com/media/en/technical-documentation/application-notes/an29f.pdf). It is specified for 1000V, 5W so not beefy enough. The transformer is also obsolete, but this comment mentions potential replacements. https://groups.google.com/d/msg/sci.electronics.design/F120QpxWWkc/74ljdPZ_BQAJ

There\'s also this design (https://www.edn.com/1-kv-power-supply-produces-a-continuous-arc/) that is 1kV, 20W. I just don\'t know enough about making it adjustable and isolated.

Thoughts on how to proceed?

If you are going to try building it yourself, then I\'d start with the
500V 5 mA one first. I built my first flyback with the LT3083,

(2018... thread here
https://groups.google.com/forum/?fromgroups=&hl=en#!searchin/sci.electronics.design/my$20first$20flyback%7Csort:date/sci.electronics.design/FQAIY1VaYBY/mLvGKJC2AgAJ

Good luck. Oh buying a ready made HV supply would be a good thing.
Gives you something to compare to if/when you have problems putting
to whole system together.

George H.


Yep. OP did not like that I disparaged/was skeptical of his plan to
build a 20 watt 1000 volt converter out of the gate but it strikes me as
a certain kind of madness as a first project if OP has not designed and
built a flyback of any type before.

Just different numbers. Shouldn\'t be really hard.


The Thor rocket was just sort of a scaled-up kerosene burning V2:

https://www.youtube.com/watch?v=WYrrVHPur2Y


OK, my bad. It would be really hard for you.




Mooom, Mr. Larkin\'s trying to peer pressure me again. He say he\'s bad!


Peer?




Sometimes I find the best way to, say, get a friend a second opinion on
her car accident situation on the social media for example. Look at the
pictures. Say \"Sigh, yep, looks like $6000 worth of damage to me. Maybe
$7000. I think they\'re probably going to rule that a total loss..\"

then you wait a little bit. And another man (almost always a man) will
come around and say \"Nah idiot. That\'s no more than $3000 in damage.
Actually I worked for the insurance industry for 8 years and DO know
what I\'m talking about, unlike you.\"

\"No way that\'s not a total loss.\"

\"Oh I beg to differ!\"

\"There is definitely, no way, that you could provide an itemized
assessment of all the damage to that car and what you believe the repair
costs should be and have that on my friend\'s desk by tomorrow morning.\"

\"PFft! I could do it in my sleep.\" \"Oh yeah?\" \"Yeah, punk.\" \"OK. Well
get on it.\" \"Right. I\'ll show you.\"

I am studying managerial techniques

If your contribution to an electronic design forum is to tell
obviously intelligent people that they shouldn\'t try to design
electronics, management is your destiny. You can write long memos just
like the blather above.

A 1KV, 20 watt flyback wouldn\'t be difficult, except to people who are
afraid to do it.



--

John Larkin Highland Technology, Inc

Science teaches us to doubt.

Claude Bernard

 

[server]

On Thu, 23 Jul 2020 11:14:20 -0400, bitrex <user@example.net> wrote:

On 7/23/2020 9:58 AM, jlarkin@highlandsniptechnology.com wrote:
On Thu, 23 Jul 2020 00:37:09 -0400, bitrex <user@example.net> wrote:

On 7/22/2020 10:01 PM, jlarkin@highlandsniptechnology.com wrote:
On Wed, 22 Jul 2020 19:18:54 -0400, bitrex <user@example.net> wrote:

On 7/22/2020 5:23 PM, John Larkin wrote:
On Wed, 22 Jul 2020 12:24:10 -0400, bitrex <user@example.net> wrote:

On 7/22/2020 10:21 AM, George Herold wrote:
On Tuesday, July 21, 2020 at 6:51:49 PM UTC-4, Matt B wrote:
I need to make a 24V to 500-1000V, 20W adjustable power supply for a pulser. It needs to be a floating or negative converter.

My specs are:
Input: 24-28V
Output voltage: 500-1000V adjustable via control signal
Output current: 10mA @ 500V (5W), 20mA @ 1000V (20W)

I\'ve been reading through threads on different HV designs. So far the only one I\'ve come across that is isolated is Figure 50 of LT Application Note 29 (https://www.analog.com/media/en/technical-documentation/application-notes/an29f.pdf). It is specified for 1000V, 5W so not beefy enough. The transformer is also obsolete, but this comment mentions potential replacements. https://groups.google.com/d/msg/sci.electronics.design/F120QpxWWkc/74ljdPZ_BQAJ

There\'s also this design (https://www.edn.com/1-kv-power-supply-produces-a-continuous-arc/) that is 1kV, 20W. I just don\'t know enough about making it adjustable and isolated.

Thoughts on how to proceed?

If you are going to try building it yourself, then I\'d start with the
500V 5 mA one first. I built my first flyback with the LT3083,

(2018... thread here
https://groups.google.com/forum/?fromgroups=&hl=en#!searchin/sci.electronics.design/my$20first$20flyback%7Csort:date/sci.electronics.design/FQAIY1VaYBY/mLvGKJC2AgAJ

Good luck. Oh buying a ready made HV supply would be a good thing.
Gives you something to compare to if/when you have problems putting
to whole system together.

George H.


Yep. OP did not like that I disparaged/was skeptical of his plan to
build a 20 watt 1000 volt converter out of the gate but it strikes me as
a certain kind of madness as a first project if OP has not designed and
built a flyback of any type before.

Just different numbers. Shouldn\'t be really hard.


The Thor rocket was just sort of a scaled-up kerosene burning V2:

https://www.youtube.com/watch?v=WYrrVHPur2Y


OK, my bad. It would be really hard for you.




Mooom, Mr. Larkin\'s trying to peer pressure me again. He say he\'s bad!


Peer?




Sometimes I find the best way to, say, get a friend a second opinion on
her car accident situation on the social media for example. Look at the
pictures. Say \"Sigh, yep, looks like $6000 worth of damage to me. Maybe
$7000. I think they\'re probably going to rule that a total loss..\"

then you wait a little bit. And another man (almost always a man) will
come around and say \"Nah idiot. That\'s no more than $3000 in damage.
Actually I worked for the insurance industry for 8 years and DO know
what I\'m talking about, unlike you.\"

\"No way that\'s not a total loss.\"

\"Oh I beg to differ!\"

\"There is definitely, no way, that you could provide an itemized
assessment of all the damage to that car and what you believe the repair
costs should be and have that on my friend\'s desk by tomorrow morning.\"

\"PFft! I could do it in my sleep.\" \"Oh yeah?\" \"Yeah, punk.\" \"OK. Well
get on it.\" \"Right. I\'ll show you.\"

I am studying managerial techniques

If your contribution to an electronic design forum is to tell
obviously intelligent people that they shouldn\'t try to design
electronics, management is your destiny. You can write long memos just
like the blather above.

A 1KV, 20 watt flyback wouldn\'t be difficult, except to people who are
afraid to do it.



--

John Larkin Highland Technology, Inc

Science teaches us to doubt.

Claude Bernard

 

[server]

This is the only company we have approved for high quality copper wire, specifically for SELV rated systems:

https://www.elektrisola.com/home.html

 

[bitrex]

On 7/23/2020 11:37 AM, jlarkin@highlandsniptechnology.com wrote:

On Thu, 23 Jul 2020 11:14:20 -0400, bitrex <user@example.net> wrote:

On 7/23/2020 9:58 AM, jlarkin@highlandsniptechnology.com wrote:
On Thu, 23 Jul 2020 00:37:09 -0400, bitrex <user@example.net> wrote:

On 7/22/2020 10:01 PM, jlarkin@highlandsniptechnology.com wrote:
On Wed, 22 Jul 2020 19:18:54 -0400, bitrex <user@example.net> wrote:

On 7/22/2020 5:23 PM, John Larkin wrote:
On Wed, 22 Jul 2020 12:24:10 -0400, bitrex <user@example.net> wrote:

On 7/22/2020 10:21 AM, George Herold wrote:
On Tuesday, July 21, 2020 at 6:51:49 PM UTC-4, Matt B wrote:
I need to make a 24V to 500-1000V, 20W adjustable power supply for a pulser. It needs to be a floating or negative converter.

My specs are:
Input: 24-28V
Output voltage: 500-1000V adjustable via control signal
Output current: 10mA @ 500V (5W), 20mA @ 1000V (20W)

I\'ve been reading through threads on different HV designs. So far the only one I\'ve come across that is isolated is Figure 50 of LT Application Note 29 (https://www.analog.com/media/en/technical-documentation/application-notes/an29f.pdf). It is specified for 1000V, 5W so not beefy enough. The transformer is also obsolete, but this comment mentions potential replacements. https://groups.google.com/d/msg/sci.electronics.design/F120QpxWWkc/74ljdPZ_BQAJ

There\'s also this design (https://www.edn.com/1-kv-power-supply-produces-a-continuous-arc/) that is 1kV, 20W. I just don\'t know enough about making it adjustable and isolated.

Thoughts on how to proceed?

If you are going to try building it yourself, then I\'d start with the
500V 5 mA one first. I built my first flyback with the LT3083,

(2018... thread here
https://groups.google.com/forum/?fromgroups=&hl=en#!searchin/sci.electronics.design/my$20first$20flyback%7Csort:date/sci.electronics.design/FQAIY1VaYBY/mLvGKJC2AgAJ

Good luck. Oh buying a ready made HV supply would be a good thing.
Gives you something to compare to if/when you have problems putting
to whole system together.

George H.


Yep. OP did not like that I disparaged/was skeptical of his plan to
build a 20 watt 1000 volt converter out of the gate but it strikes me as
a certain kind of madness as a first project if OP has not designed and
built a flyback of any type before.

Just different numbers. Shouldn\'t be really hard.


The Thor rocket was just sort of a scaled-up kerosene burning V2:

https://www.youtube.com/watch?v=WYrrVHPur2Y


OK, my bad. It would be really hard for you.




Mooom, Mr. Larkin\'s trying to peer pressure me again. He say he\'s bad!


Peer?




Sometimes I find the best way to, say, get a friend a second opinion on
her car accident situation on the social media for example. Look at the
pictures. Say \"Sigh, yep, looks like $6000 worth of damage to me. Maybe
$7000. I think they\'re probably going to rule that a total loss..\"

then you wait a little bit. And another man (almost always a man) will
come around and say \"Nah idiot. That\'s no more than $3000 in damage.
Actually I worked for the insurance industry for 8 years and DO know
what I\'m talking about, unlike you.\"

\"No way that\'s not a total loss.\"

\"Oh I beg to differ!\"

\"There is definitely, no way, that you could provide an itemized
assessment of all the damage to that car and what you believe the repair
costs should be and have that on my friend\'s desk by tomorrow morning.\"

\"PFft! I could do it in my sleep.\" \"Oh yeah?\" \"Yeah, punk.\" \"OK. Well
get on it.\" \"Right. I\'ll show you.\"

I am studying managerial techniques


If your contribution to an electronic design forum is to tell
obviously intelligent people that they shouldn\'t try to design
electronics, management is your destiny. You can write long memos just
like the blather above.

A 1KV, 20 watt flyback wouldn\'t be difficult, except to people who are
afraid to do it.

Pfft. No way you could design him a circuit like that by the weekend.
You ain\'t got the guts!

 

[bitrex]

On 7/23/2020 11:37 AM, jlarkin@highlandsniptechnology.com wrote:

On Thu, 23 Jul 2020 11:14:20 -0400, bitrex <user@example.net> wrote:

On 7/23/2020 9:58 AM, jlarkin@highlandsniptechnology.com wrote:
On Thu, 23 Jul 2020 00:37:09 -0400, bitrex <user@example.net> wrote:

On 7/22/2020 10:01 PM, jlarkin@highlandsniptechnology.com wrote:
On Wed, 22 Jul 2020 19:18:54 -0400, bitrex <user@example.net> wrote:

On 7/22/2020 5:23 PM, John Larkin wrote:
On Wed, 22 Jul 2020 12:24:10 -0400, bitrex <user@example.net> wrote:

On 7/22/2020 10:21 AM, George Herold wrote:
On Tuesday, July 21, 2020 at 6:51:49 PM UTC-4, Matt B wrote:
I need to make a 24V to 500-1000V, 20W adjustable power supply for a pulser. It needs to be a floating or negative converter.

My specs are:
Input: 24-28V
Output voltage: 500-1000V adjustable via control signal
Output current: 10mA @ 500V (5W), 20mA @ 1000V (20W)

I\'ve been reading through threads on different HV designs. So far the only one I\'ve come across that is isolated is Figure 50 of LT Application Note 29 (https://www.analog.com/media/en/technical-documentation/application-notes/an29f.pdf). It is specified for 1000V, 5W so not beefy enough. The transformer is also obsolete, but this comment mentions potential replacements. https://groups.google.com/d/msg/sci.electronics.design/F120QpxWWkc/74ljdPZ_BQAJ

There\'s also this design (https://www.edn.com/1-kv-power-supply-produces-a-continuous-arc/) that is 1kV, 20W. I just don\'t know enough about making it adjustable and isolated.

Thoughts on how to proceed?

If you are going to try building it yourself, then I\'d start with the
500V 5 mA one first. I built my first flyback with the LT3083,

(2018... thread here
https://groups.google.com/forum/?fromgroups=&hl=en#!searchin/sci.electronics.design/my$20first$20flyback%7Csort:date/sci.electronics.design/FQAIY1VaYBY/mLvGKJC2AgAJ

Good luck. Oh buying a ready made HV supply would be a good thing.
Gives you something to compare to if/when you have problems putting
to whole system together.

George H.


Yep. OP did not like that I disparaged/was skeptical of his plan to
build a 20 watt 1000 volt converter out of the gate but it strikes me as
a certain kind of madness as a first project if OP has not designed and
built a flyback of any type before.

Just different numbers. Shouldn\'t be really hard.


The Thor rocket was just sort of a scaled-up kerosene burning V2:

https://www.youtube.com/watch?v=WYrrVHPur2Y


OK, my bad. It would be really hard for you.




Mooom, Mr. Larkin\'s trying to peer pressure me again. He say he\'s bad!


Peer?




Sometimes I find the best way to, say, get a friend a second opinion on
her car accident situation on the social media for example. Look at the
pictures. Say \"Sigh, yep, looks like $6000 worth of damage to me. Maybe
$7000. I think they\'re probably going to rule that a total loss..\"

then you wait a little bit. And another man (almost always a man) will
come around and say \"Nah idiot. That\'s no more than $3000 in damage.
Actually I worked for the insurance industry for 8 years and DO know
what I\'m talking about, unlike you.\"

\"No way that\'s not a total loss.\"

\"Oh I beg to differ!\"

\"There is definitely, no way, that you could provide an itemized
assessment of all the damage to that car and what you believe the repair
costs should be and have that on my friend\'s desk by tomorrow morning.\"

\"PFft! I could do it in my sleep.\" \"Oh yeah?\" \"Yeah, punk.\" \"OK. Well
get on it.\" \"Right. I\'ll show you.\"

I am studying managerial techniques


If your contribution to an electronic design forum is to tell
obviously intelligent people that they shouldn\'t try to design
electronics, management is your destiny. You can write long memos just
like the blather above.

A 1KV, 20 watt flyback wouldn\'t be difficult, except to people who are
afraid to do it.

Pfft. No way you could design him a circuit like that by the weekend.
You ain\'t got the guts!

 

[bitrex]

On 7/23/2020 11:37 AM, jlarkin@highlandsniptechnology.com wrote:

On Thu, 23 Jul 2020 11:14:20 -0400, bitrex <user@example.net> wrote:

On 7/23/2020 9:58 AM, jlarkin@highlandsniptechnology.com wrote:
On Thu, 23 Jul 2020 00:37:09 -0400, bitrex <user@example.net> wrote:

On 7/22/2020 10:01 PM, jlarkin@highlandsniptechnology.com wrote:
On Wed, 22 Jul 2020 19:18:54 -0400, bitrex <user@example.net> wrote:

On 7/22/2020 5:23 PM, John Larkin wrote:
On Wed, 22 Jul 2020 12:24:10 -0400, bitrex <user@example.net> wrote:

On 7/22/2020 10:21 AM, George Herold wrote:
On Tuesday, July 21, 2020 at 6:51:49 PM UTC-4, Matt B wrote:
I need to make a 24V to 500-1000V, 20W adjustable power supply for a pulser. It needs to be a floating or negative converter.

My specs are:
Input: 24-28V
Output voltage: 500-1000V adjustable via control signal
Output current: 10mA @ 500V (5W), 20mA @ 1000V (20W)

I\'ve been reading through threads on different HV designs. So far the only one I\'ve come across that is isolated is Figure 50 of LT Application Note 29 (https://www.analog.com/media/en/technical-documentation/application-notes/an29f.pdf). It is specified for 1000V, 5W so not beefy enough. The transformer is also obsolete, but this comment mentions potential replacements. https://groups.google.com/d/msg/sci.electronics.design/F120QpxWWkc/74ljdPZ_BQAJ

There\'s also this design (https://www.edn.com/1-kv-power-supply-produces-a-continuous-arc/) that is 1kV, 20W. I just don\'t know enough about making it adjustable and isolated.

Thoughts on how to proceed?

If you are going to try building it yourself, then I\'d start with the
500V 5 mA one first. I built my first flyback with the LT3083,

(2018... thread here
https://groups.google.com/forum/?fromgroups=&hl=en#!searchin/sci.electronics.design/my$20first$20flyback%7Csort:date/sci.electronics.design/FQAIY1VaYBY/mLvGKJC2AgAJ

Good luck. Oh buying a ready made HV supply would be a good thing.
Gives you something to compare to if/when you have problems putting
to whole system together.

George H.


Yep. OP did not like that I disparaged/was skeptical of his plan to
build a 20 watt 1000 volt converter out of the gate but it strikes me as
a certain kind of madness as a first project if OP has not designed and
built a flyback of any type before.

Just different numbers. Shouldn\'t be really hard.


The Thor rocket was just sort of a scaled-up kerosene burning V2:

https://www.youtube.com/watch?v=WYrrVHPur2Y


OK, my bad. It would be really hard for you.




Mooom, Mr. Larkin\'s trying to peer pressure me again. He say he\'s bad!


Peer?




Sometimes I find the best way to, say, get a friend a second opinion on
her car accident situation on the social media for example. Look at the
pictures. Say \"Sigh, yep, looks like $6000 worth of damage to me. Maybe
$7000. I think they\'re probably going to rule that a total loss..\"

then you wait a little bit. And another man (almost always a man) will
come around and say \"Nah idiot. That\'s no more than $3000 in damage.
Actually I worked for the insurance industry for 8 years and DO know
what I\'m talking about, unlike you.\"

\"No way that\'s not a total loss.\"

\"Oh I beg to differ!\"

\"There is definitely, no way, that you could provide an itemized
assessment of all the damage to that car and what you believe the repair
costs should be and have that on my friend\'s desk by tomorrow morning.\"

\"PFft! I could do it in my sleep.\" \"Oh yeah?\" \"Yeah, punk.\" \"OK. Well
get on it.\" \"Right. I\'ll show you.\"

I am studying managerial techniques


If your contribution to an electronic design forum is to tell
obviously intelligent people that they shouldn\'t try to design
electronics, management is your destiny. You can write long memos just
like the blather above.

A 1KV, 20 watt flyback wouldn\'t be difficult, except to people who are
afraid to do it.

Pfft. No way you could design him a circuit like that by the weekend.
You ain\'t got the guts!

 

[server]

A 1kV 20W flyback is not much harder than a typical low voltage flyback. Just need to get the correct wire. Notice that enameled wire much be operated at much much lower voltage than what you can test it for your self. Typical errors is to not take into consideration impurities of the lacquer, elevated temperatures, stresses when winding, etc

 

[server]

A 1kV 20W flyback is not much harder than a typical low voltage flyback. Just need to get the correct wire. Notice that enameled wire much be operated at much much lower voltage than what you can test it for your self. Typical errors is to not take into consideration impurities of the lacquer, elevated temperatures, stresses when winding, etc

 

[server]

A 1kV 20W flyback is not much harder than a typical low voltage flyback. Just need to get the correct wire. Notice that enameled wire much be operated at much much lower voltage than what you can test it for your self. Typical errors is to not take into consideration impurities of the lacquer, elevated temperatures, stresses when winding, etc

 

[Phil Hobbs]

On 2020-07-23 12:12, klaus.kragelund@gmail.com wrote:

A 1kV 20W flyback is not much harder than a typical low voltage flyback. Just need to get the correct wire. Notice that enameled wire much be operated at much much lower voltage than what you can test it for your self. Typical errors is to not take into consideration impurities of the lacquer, elevated temperatures, stresses when winding, etc

And ozone from corona discharge.

Cheers

Phil Hobbs

--
Dr Philip C D Hobbs
Principal Consultant
ElectroOptical Innovations LLC / Hobbs ElectroOptics
Optics, Electro-optics, Photonics, Analog Electronics
Briarcliff Manor NY 10510

http://electrooptical.net
http://hobbs-eo.com

 

[Phil Hobbs]

On 2020-07-23 12:12, klaus.kragelund@gmail.com wrote:

A 1kV 20W flyback is not much harder than a typical low voltage flyback. Just need to get the correct wire. Notice that enameled wire much be operated at much much lower voltage than what you can test it for your self. Typical errors is to not take into consideration impurities of the lacquer, elevated temperatures, stresses when winding, etc

And ozone from corona discharge.

Cheers

Phil Hobbs

--
Dr Philip C D Hobbs
Principal Consultant
ElectroOptical Innovations LLC / Hobbs ElectroOptics
Optics, Electro-optics, Photonics, Analog Electronics
Briarcliff Manor NY 10510

http://electrooptical.net
http://hobbs-eo.com

 

[Phil Hobbs]

On 2020-07-23 12:12, klaus.kragelund@gmail.com wrote:

A 1kV 20W flyback is not much harder than a typical low voltage flyback. Just need to get the correct wire. Notice that enameled wire much be operated at much much lower voltage than what you can test it for your self. Typical errors is to not take into consideration impurities of the lacquer, elevated temperatures, stresses when winding, etc

And ozone from corona discharge.

Cheers

Phil Hobbs

--
Dr Philip C D Hobbs
Principal Consultant
ElectroOptical Innovations LLC / Hobbs ElectroOptics
Optics, Electro-optics, Photonics, Analog Electronics
Briarcliff Manor NY 10510

http://electrooptical.net
http://hobbs-eo.com

 

[bitrex]

On 7/23/2020 12:12 PM, klaus.kragelund@gmail.com wrote:

A 1kV 20W flyback is not much harder than a typical low voltage flyback. Just need to get the correct wire. Notice that enameled wire much be operated at much much lower voltage than what you can test it for your self. Typical errors is to not take into consideration impurities of the lacquer, elevated temperatures, stresses when winding, etc

I don\'t think you\'re MAN enough to do some research into distributors
who carry the correct wire and find some optimum part #s and post those
links here.

 

[server]

On Thu, 23 Jul 2020 12:00:45 -0400, bitrex <user@example.net> wrote:

On 7/23/2020 11:37 AM, jlarkin@highlandsniptechnology.com wrote:
On Thu, 23 Jul 2020 11:14:20 -0400, bitrex <user@example.net> wrote:

On 7/23/2020 9:58 AM, jlarkin@highlandsniptechnology.com wrote:
On Thu, 23 Jul 2020 00:37:09 -0400, bitrex <user@example.net> wrote:

On 7/22/2020 10:01 PM, jlarkin@highlandsniptechnology.com wrote:
On Wed, 22 Jul 2020 19:18:54 -0400, bitrex <user@example.net> wrote:

On 7/22/2020 5:23 PM, John Larkin wrote:
On Wed, 22 Jul 2020 12:24:10 -0400, bitrex <user@example.net> wrote:

On 7/22/2020 10:21 AM, George Herold wrote:
On Tuesday, July 21, 2020 at 6:51:49 PM UTC-4, Matt B wrote:
I need to make a 24V to 500-1000V, 20W adjustable power supply for a pulser. It needs to be a floating or negative converter.

My specs are:
Input: 24-28V
Output voltage: 500-1000V adjustable via control signal
Output current: 10mA @ 500V (5W), 20mA @ 1000V (20W)

I\'ve been reading through threads on different HV designs. So far the only one I\'ve come across that is isolated is Figure 50 of LT Application Note 29 (https://www.analog.com/media/en/technical-documentation/application-notes/an29f.pdf). It is specified for 1000V, 5W so not beefy enough. The transformer is also obsolete, but this comment mentions potential replacements. https://groups.google.com/d/msg/sci.electronics.design/F120QpxWWkc/74ljdPZ_BQAJ

There\'s also this design (https://www.edn.com/1-kv-power-supply-produces-a-continuous-arc/) that is 1kV, 20W. I just don\'t know enough about making it adjustable and isolated.

Thoughts on how to proceed?

If you are going to try building it yourself, then I\'d start with the
500V 5 mA one first. I built my first flyback with the LT3083,

(2018... thread here
https://groups.google.com/forum/?fromgroups=&hl=en#!searchin/sci.electronics.design/my$20first$20flyback%7Csort:date/sci.electronics.design/FQAIY1VaYBY/mLvGKJC2AgAJ

Good luck. Oh buying a ready made HV supply would be a good thing.
Gives you something to compare to if/when you have problems putting
to whole system together.

George H.


Yep. OP did not like that I disparaged/was skeptical of his plan to
build a 20 watt 1000 volt converter out of the gate but it strikes me as
a certain kind of madness as a first project if OP has not designed and
built a flyback of any type before.

Just different numbers. Shouldn\'t be really hard.


The Thor rocket was just sort of a scaled-up kerosene burning V2:

https://www.youtube.com/watch?v=WYrrVHPur2Y


OK, my bad. It would be really hard for you.




Mooom, Mr. Larkin\'s trying to peer pressure me again. He say he\'s bad!


Peer?




Sometimes I find the best way to, say, get a friend a second opinion on
her car accident situation on the social media for example. Look at the
pictures. Say \"Sigh, yep, looks like $6000 worth of damage to me. Maybe
$7000. I think they\'re probably going to rule that a total loss..\"

then you wait a little bit. And another man (almost always a man) will
come around and say \"Nah idiot. That\'s no more than $3000 in damage.
Actually I worked for the insurance industry for 8 years and DO know
what I\'m talking about, unlike you.\"

\"No way that\'s not a total loss.\"

\"Oh I beg to differ!\"

\"There is definitely, no way, that you could provide an itemized
assessment of all the damage to that car and what you believe the repair
costs should be and have that on my friend\'s desk by tomorrow morning.\"

\"PFft! I could do it in my sleep.\" \"Oh yeah?\" \"Yeah, punk.\" \"OK. Well
get on it.\" \"Right. I\'ll show you.\"

I am studying managerial techniques


If your contribution to an electronic design forum is to tell
obviously intelligent people that they shouldn\'t try to design
electronics, management is your destiny. You can write long memos just
like the blather above.

A 1KV, 20 watt flyback wouldn\'t be difficult, except to people who are
afraid to do it.



Pfft. No way you could design him a circuit like that by the weekend.
You ain\'t got the guts!

I do HV flybacks all the time. I\'ve posted several here. I\'ll sim and
build another one this week if my customer can decide what he really
needs.

Any decent analog designer could Spice this in an houror two; I could
do it in 20 minutes, but I\'m familiar with the part. All of the LT3083
boosts and flybacks that I\'ve simulated have worked as expected. My
only problem has been inductor heating, which won\'t be an issue here
with the recommended transformer.

If he wants to scribble or Spice a circuit, I offered to help. I\'m
sure MPS would help too.

You wouldn\'t try it, would you? Do it. Post it.



--

John Larkin Highland Technology, Inc

Science teaches us to doubt.

Claude Bernard