For the beginners ? here a bit of electronics theory...

[Jan Panteltje]

How to overcome the limits of boost converters:
https://www.electronicdesign.com/power-management/whitepaper/21252189/analog-devices-how-to-overcome-the-limits-of-boost-converters

This brings me back to designing TV horizontal output transformers and HV circuits...

Maybe be y\'r tesla will run faster...

?

But anyways, nice article, but nothing like designing and building one yourself and finding out.

 

[John Larkin]

On Sun, 09 Oct 2022 08:03:46 GMT, Jan Panteltje
<pNaonStpealmtje@yahoo.com> wrote:

How to overcome the limits of boost converters:
https://www.electronicdesign.com/power-management/whitepaper/21252189/analog-devices-how-to-overcome-the-limits-of-boost-converters

This brings me back to designing TV horizontal output transformers and HV circuits...

Maybe be y\'r tesla will run faster...

?

But anyways, nice article, but nothing like designing and building one yourself and finding out.

He jumps to \"in conclusion\" too soon. There\'s capacitances to worry
about, and inductor saturation.

I like to use a dual-winding inductor, like the DRQ series, and build
an autotransformer boost converter, which helps get high output
voltage.

 

[server]

Jan Panteltje <pNaonStpealmtje@yahoo.com> wrote in news:thtvdg$eui8$1
@dont-email.me:

> But anyways,

Go away, TrumpTainted fucktard.

 

[Jan Panteltje]

On a sunny day (Sun, 09 Oct 2022 03:12:53 -0700) it happened John Larkin
<jlarkin@highlandSNIPMEtechnology.com> wrote in
<oa75kh1m7jkagtt3b99969mooc8ljep0r6@4ax.com>:

On Sun, 09 Oct 2022 08:03:46 GMT, Jan Panteltje
pNaonStpealmtje@yahoo.com> wrote:

How to overcome the limits of boost converters:

https://www.electronicdesign.com/power-management/whitepaper/21252189/analog-devices-how-to-overcome-the-limits-of-boost-converters

This brings me back to designing TV horizontal output transformers and HV circuits...

Maybe be y\'r tesla will run faster...

?

But anyways, nice article, but nothing like designing and building one yourself and finding out.


He jumps to \"in conclusion\" too soon. There\'s capacitances to worry
about, and inductor saturation.

I like to use a dual-winding inductor, like the DRQ series, and build
an autotransformer boost converter, which helps get high output
voltage.

The old CRT TV flyback was very interesting
64 uS line time, few uS flyback time, 25 kV HV tuned, linear current in deflection coil... S correction..
plus some pincussion corrections for color TV.
Later ones had a voltage multiplier.
Early ones a PD100 stabilizer triode on the 25 kV.
I have kept one CRT color monitor in the attic, my personal particle accelerator!

My first CRT scope used a BW 43 cm CRT and an old car ignition coil driven by an audio amplifier at a few kHz
for HV and deflection. Not very linear but great fun, Tube diode as HV rectifier.

For real HV:
https://www.ebay.com/itm/202430566213

I have one, 20kV is more what it looks like

PMT HV supply:
http://panteltje.com/pub/PMT_regulated_power_supply_diagram_img_3182.jpg

Or this PMT circuit, some kV:
http://panteltje.com/panteltje/pic/sc_pic/

 

[amdx]

On 10/9/2022 7:01 AM, Jan Panteltje wrote:

On a sunny day (Sun, 09 Oct 2022 03:12:53 -0700) it happened John Larkin
jlarkin@highlandSNIPMEtechnology.com> wrote in
oa75kh1m7jkagtt3b99969mooc8ljep0r6@4ax.com>:

On Sun, 09 Oct 2022 08:03:46 GMT, Jan Panteltje
pNaonStpealmtje@yahoo.com> wrote:

How to overcome the limits of boost converters:

https://www.electronicdesign.com/power-management/whitepaper/21252189/analog-devices-how-to-overcome-the-limits-of-boost-converters

This brings me back to designing TV horizontal output transformers and HV circuits...

Maybe be y\'r tesla will run faster...

?

But anyways, nice article, but nothing like designing and building one yourself and finding out.

He jumps to \"in conclusion\" too soon. There\'s capacitances to worry
about, and inductor saturation.

I like to use a dual-winding inductor, like the DRQ series, and build
an autotransformer boost converter, which helps get high output
voltage.
The old CRT TV flyback was very interesting
64 uS line time, few uS flyback time, 25 kV HV tuned, linear current in deflection coil... S correction..
plus some pincussion corrections for color TV.
Later ones had a voltage multiplier.
Early ones a PD100 stabilizer triode on the 25 kV.
I have kept one CRT color monitor in the attic, my personal particle accelerator!

My first CRT scope used a BW 43 cm CRT and an old car ignition coil driven by an audio amplifier at a few kHz
for HV and deflection. Not very linear but great fun, Tube diode as HV rectifier.

For real HV:
https://www.ebay.com/itm/202430566213

I have one, 20kV is more what it looks like

PMT HV supply:
http://panteltje.com/pub/PMT_regulated_power_supply_diagram_img_3182.jpg

The 1MV unit(Module type: MC-901)  is uhum interesting, 1 Amp out at 1
MV  ;-)
yes, typo.
                              Mikek

Or this PMT circuit, some kV:
http://panteltje.com/panteltje/pic/sc_pic/

 

[John Larkin]

On Sun, 09 Oct 2022 12:01:35 GMT, Jan Panteltje
<pNaonStpealmtje@yahoo.com> wrote:

On a sunny day (Sun, 09 Oct 2022 03:12:53 -0700) it happened John Larkin
jlarkin@highlandSNIPMEtechnology.com> wrote in
oa75kh1m7jkagtt3b99969mooc8ljep0r6@4ax.com>:

On Sun, 09 Oct 2022 08:03:46 GMT, Jan Panteltje
pNaonStpealmtje@yahoo.com> wrote:

How to overcome the limits of boost converters:

https://www.electronicdesign.com/power-management/whitepaper/21252189/analog-devices-how-to-overcome-the-limits-of-boost-converters

This brings me back to designing TV horizontal output transformers and HV circuits...

Maybe be y\'r tesla will run faster...

?

But anyways, nice article, but nothing like designing and building one yourself and finding out.


He jumps to \"in conclusion\" too soon. There\'s capacitances to worry
about, and inductor saturation.

I like to use a dual-winding inductor, like the DRQ series, and build
an autotransformer boost converter, which helps get high output
voltage.

The old CRT TV flyback was very interesting
64 uS line time, few uS flyback time, 25 kV HV tuned, linear current in deflection coil... S correction..
plus some pincussion corrections for color TV.
Later ones had a voltage multiplier.
Early ones a PD100 stabilizer triode on the 25 kV.
I have kept one CRT color monitor in the attic, my personal particle accelerator!

My first CRT scope used a BW 43 cm CRT and an old car ignition coil driven by an audio amplifier at a few kHz
for HV and deflection. Not very linear but great fun, Tube diode as HV rectifier.

For real HV:
https://www.ebay.com/itm/202430566213

I have one, 20kV is more what it looks like

PMT HV supply:
http://panteltje.com/pub/PMT_regulated_power_supply_diagram_img_3182.jpg

Or this PMT circuit, some kV:
http://panteltje.com/panteltje/pic/sc_pic/

Here\'s a small HV supply:

https://www.dropbox.com/s/e3n5af9sw1a1flh/28S840A_3.pdf?dl=0

LTC3803 is a great little chip.

I\'m currently designing the power supplies for a new delay generator
box. Input is from a +12 or +24 wart, either has to work. The design
engineer C wants +20Q, +5Q, +4Q, +3.3, +1.8, +1.35, +1, -6, and -5Q,
where Q means a very quiet supply. The C wants +2.5 too and she won\'t
get it; enough is enough.

It has to all fit into 4 square inches x 0.2 high and use parts we can
get and not splatter a bunch of EMI. Yuk. It\'s like playing a
9-dimensional chess game when you\'re drunk.

Zynq FPGAs are great but real power hogs.

 

[Fred Bloggs]

On Sunday, October 9, 2022 at 4:06:17 AM UTC-4, Jan Panteltje wrote:

How to overcome the limits of boost converters:
https://www.electronicdesign.com/power-management/whitepaper/21252189/analog-devices-how-to-overcome-the-limits-of-boost-converters

This brings me back to designing TV horizontal output transformers and HV circuits...

Maybe be y\'r tesla will run faster...

?

But anyways, nice article, but nothing like designing and building one yourself and finding out.

Misleading title to that article, he does no such thing. It\'s a bunch of run-of-the-mill factoids about boost converters dating back 50 years now. And he\'s just finding about it now?

Anybody who creates such a confounded mess they have to refer to equation 101.23 as a justification for further development of the topic is a moron.

 

[Jan Panteltje]

On a sunny day (Sun, 09 Oct 2022 08:45:26 -0700) it happened John Larkin
<jlarkin@highlandSNIPMEtechnology.com> wrote in
<vpp5khtd24t4kd2dkp2auo0iirb8n4bdg6@4ax.com>:

On Sun, 09 Oct 2022 12:01:35 GMT, Jan Panteltje
pNaonStpealmtje@yahoo.com> wrote:

On a sunny day (Sun, 09 Oct 2022 03:12:53 -0700) it happened John Larkin
jlarkin@highlandSNIPMEtechnology.com> wrote in
oa75kh1m7jkagtt3b99969mooc8ljep0r6@4ax.com>:

On Sun, 09 Oct 2022 08:03:46 GMT, Jan Panteltje
pNaonStpealmtje@yahoo.com> wrote:

How to overcome the limits of boost converters:


https://www.electronicdesign.com/power-management/whitepaper/21252189/analog-devices-how-to-overcome-the-limits-of-boost-converters

This brings me back to designing TV horizontal output transformers and HV circuits...

Maybe be y\'r tesla will run faster...

?

But anyways, nice article, but nothing like designing and building one yourself and finding out.


He jumps to \"in conclusion\" too soon. There\'s capacitances to worry
about, and inductor saturation.

I like to use a dual-winding inductor, like the DRQ series, and build
an autotransformer boost converter, which helps get high output
voltage.

The old CRT TV flyback was very interesting
64 uS line time, few uS flyback time, 25 kV HV tuned, linear current in deflection coil... S correction..
plus some pincussion corrections for color TV.
Later ones had a voltage multiplier.
Early ones a PD100 stabilizer triode on the 25 kV.
I have kept one CRT color monitor in the attic, my personal particle accelerator!

My first CRT scope used a BW 43 cm CRT and an old car ignition coil driven by an audio amplifier at a few kHz
for HV and deflection. Not very linear but great fun, Tube diode as HV rectifier.

For real HV:
https://www.ebay.com/itm/202430566213

I have one, 20kV is more what it looks like

PMT HV supply:
http://panteltje.com/pub/PMT_regulated_power_supply_diagram_img_3182.jpg

Or this PMT circuit, some kV:
http://panteltje.com/panteltje/pic/sc_pic/





Here\'s a small HV supply:

https://www.dropbox.com/s/e3n5af9sw1a1flh/28S840A_3.pdf?dl=0

LTC3803 is a great little chip.

Interesting, that switch S2 to lower the voltage
Also that LED in series with the 78L15 to get to 17 V, I have used LEDs as zeners several times.
Never used that LTC3803, usually program a PIC 18F14K22 as those have a comparator that is hardwired to its PWM
generator so overcurrent trigger works very good and fast, plus ADCs of course, and serial and i2c communication.

I\'m currently designing the power supplies for a new delay generator
box. Input is from a +12 or +24 wart, either has to work. The design
engineer C wants +20Q, +5Q, +4Q, +3.3, +1.8, +1.35, +1, -6, and -5Q,
where Q means a very quiet supply. The C wants +2.5 too and she won\'t
get it; enough is enough.

Ground loops... ?
looks a bit .. well.. much.. some LM317s ?? LOL
one switcher with transformer with separate secondary windings for + and - and LM317s to the little voltage steps..
Realy need to know the currents.. and stabilization accuracy.

It has to all fit into 4 square inches x 0.2 high and use parts we can
get and not splatter a bunch of EMI. Yuk. It\'s like playing a
9-dimensional chess game when you\'re drunk.

Zynq FPGAs are great but real power hogs.

So no LM317 but those LM2576 switchers?
I once did a thyristor regulator followed by a transistor regulator to filter the ripple
the tranistor regulator drove the thyristor so there would always be just enough voltage across the series transistor
to filter the ripple..

 

[John Larkin]

On Sun, 09 Oct 2022 17:36:56 GMT, Jan Panteltje
<pNaonStpealmtje@yahoo.com> wrote:

On a sunny day (Sun, 09 Oct 2022 08:45:26 -0700) it happened John Larkin
jlarkin@highlandSNIPMEtechnology.com> wrote in
vpp5khtd24t4kd2dkp2auo0iirb8n4bdg6@4ax.com>:

On Sun, 09 Oct 2022 12:01:35 GMT, Jan Panteltje
pNaonStpealmtje@yahoo.com> wrote:

On a sunny day (Sun, 09 Oct 2022 03:12:53 -0700) it happened John Larkin
jlarkin@highlandSNIPMEtechnology.com> wrote in
oa75kh1m7jkagtt3b99969mooc8ljep0r6@4ax.com>:

On Sun, 09 Oct 2022 08:03:46 GMT, Jan Panteltje
pNaonStpealmtje@yahoo.com> wrote:

How to overcome the limits of boost converters:


https://www.electronicdesign.com/power-management/whitepaper/21252189/analog-devices-how-to-overcome-the-limits-of-boost-converters

This brings me back to designing TV horizontal output transformers and HV circuits...

Maybe be y\'r tesla will run faster...

?

But anyways, nice article, but nothing like designing and building one yourself and finding out.


He jumps to \"in conclusion\" too soon. There\'s capacitances to worry
about, and inductor saturation.

I like to use a dual-winding inductor, like the DRQ series, and build
an autotransformer boost converter, which helps get high output
voltage.

The old CRT TV flyback was very interesting
64 uS line time, few uS flyback time, 25 kV HV tuned, linear current in deflection coil... S correction..
plus some pincussion corrections for color TV.
Later ones had a voltage multiplier.
Early ones a PD100 stabilizer triode on the 25 kV.
I have kept one CRT color monitor in the attic, my personal particle accelerator!

My first CRT scope used a BW 43 cm CRT and an old car ignition coil driven by an audio amplifier at a few kHz
for HV and deflection. Not very linear but great fun, Tube diode as HV rectifier.

For real HV:
https://www.ebay.com/itm/202430566213

I have one, 20kV is more what it looks like

PMT HV supply:
http://panteltje.com/pub/PMT_regulated_power_supply_diagram_img_3182.jpg

Or this PMT circuit, some kV:
http://panteltje.com/panteltje/pic/sc_pic/





Here\'s a small HV supply:

https://www.dropbox.com/s/e3n5af9sw1a1flh/28S840A_3.pdf?dl=0

LTC3803 is a great little chip.

Interesting, that switch S2 to lower the voltage
Also that LED in series with the 78L15 to get to 17 V, I have used LEDs as zeners several times.
Never used that LTC3803, usually program a PIC 18F14K22 as those have a comparator that is hardwired to its PWM
generator so overcurrent trigger works very good and fast, plus ADCs of course, and serial and i2c communication.

The 3803 runs the inductor to a peak current every cycle, which is
cool. It results in a constant-power limit much above Vin, rather than
constant-current.

I\'m currently designing the power supplies for a new delay generator
box. Input is from a +12 or +24 wart, either has to work. The design
engineer C wants +20Q, +5Q, +4Q, +3.3, +1.8, +1.35, +1, -6, and -5Q,
where Q means a very quiet supply. The C wants +2.5 too and she won\'t
get it; enough is enough.

Ground loops... ?
looks a bit .. well.. much.. some LM317s ?? LOL

We need low dropout linears to save power. LM1117 or preferably
LM2941, whatever we can get.

one switcher with transformer with separate secondary windings for + and - and LM317s to the little voltage steps..
Realy need to know the currents.. and stabilization accuracy.

Total maybe 8 watts. The horrble Zynq may need an amp or more of +1
alone.

It has to all fit into 4 square inches x 0.2 high and use parts we can
get and not splatter a bunch of EMI. Yuk. It\'s like playing a
9-dimensional chess game when you\'re drunk.

Zynq FPGAs are great but real power hogs.

So no LM317 but those LM2576 switchers?

Looks like we can get the cute little TPS5 series of synchronous
switchers. We just scored a reel of TPS562208 for 19 cents each, but
they are 17v max input so we need another part for the first switcher.

I like LM2576, dumb and quiet, but it\'s big and needs a big catch
diode and a giant inductor. Need something else.

I once did a thyristor regulator followed by a transistor regulator to filter the ripple
the tranistor regulator drove the thyristor so there would always be just enough voltage across the series transistor
to filter the ripple..

I can top that. A pre-regulator in the AC line, a giant power resistor
and a shunt thysistor, bang-bang on/off regulation.

 

[Jan Panteltje]

On a sunny day (Sun, 09 Oct 2022 12:37:01 -0700) it happened John Larkin
<jlarkin@highlandSNIPMEtechnology.com> wrote in
<5s76khharga8opfcc04s4emtnaq5n2st69@4ax.com>:

On Sun, 09 Oct 2022 17:36:56 GMT, Jan Panteltje
pNaonStpealmtje@yahoo.com> wrote:

On a sunny day (Sun, 09 Oct 2022 08:45:26 -0700) it happened John Larkin
jlarkin@highlandSNIPMEtechnology.com> wrote in
vpp5khtd24t4kd2dkp2auo0iirb8n4bdg6@4ax.com>:

On Sun, 09 Oct 2022 12:01:35 GMT, Jan Panteltje
pNaonStpealmtje@yahoo.com> wrote:

On a sunny day (Sun, 09 Oct 2022 03:12:53 -0700) it happened John Larkin
jlarkin@highlandSNIPMEtechnology.com> wrote in
oa75kh1m7jkagtt3b99969mooc8ljep0r6@4ax.com>:

On Sun, 09 Oct 2022 08:03:46 GMT, Jan Panteltje
pNaonStpealmtje@yahoo.com> wrote:

How to overcome the limits of boost converters:



https://www.electronicdesign.com/power-management/whitepaper/21252189/analog-devices-how-to-overcome-the-limits-of-boost-converters

This brings me back to designing TV horizontal output transformers and HV circuits...

Maybe be y\'r tesla will run faster...

?

But anyways, nice article, but nothing like designing and building one yourself and finding out.


He jumps to \"in conclusion\" too soon. There\'s capacitances to worry
about, and inductor saturation.

I like to use a dual-winding inductor, like the DRQ series, and build
an autotransformer boost converter, which helps get high output
voltage.

The old CRT TV flyback was very interesting
64 uS line time, few uS flyback time, 25 kV HV tuned, linear current in deflection coil... S correction..
plus some pincussion corrections for color TV.
Later ones had a voltage multiplier.
Early ones a PD100 stabilizer triode on the 25 kV.
I have kept one CRT color monitor in the attic, my personal particle accelerator!

My first CRT scope used a BW 43 cm CRT and an old car ignition coil driven by an audio amplifier at a few kHz
for HV and deflection. Not very linear but great fun, Tube diode as HV rectifier.

For real HV:
https://www.ebay.com/itm/202430566213

I have one, 20kV is more what it looks like

PMT HV supply:
http://panteltje.com/pub/PMT_regulated_power_supply_diagram_img_3182.jpg

Or this PMT circuit, some kV:
http://panteltje.com/panteltje/pic/sc_pic/





Here\'s a small HV supply:

https://www.dropbox.com/s/e3n5af9sw1a1flh/28S840A_3.pdf?dl=0

LTC3803 is a great little chip.

Interesting, that switch S2 to lower the voltage
Also that LED in series with the 78L15 to get to 17 V, I have used LEDs as zeners several times.
Never used that LTC3803, usually program a PIC 18F14K22 as those have a comparator that is hardwired to its PWM
generator so overcurrent trigger works very good and fast, plus ADCs of course, and serial and i2c communication.



The 3803 runs the inductor to a peak current every cycle, which is
cool. It results in a constant-power limit much above Vin, rather than
constant-current.





I\'m currently designing the power supplies for a new delay generator
box. Input is from a +12 or +24 wart, either has to work. The design
engineer C wants +20Q, +5Q, +4Q, +3.3, +1.8, +1.35, +1, -6, and -5Q,
where Q means a very quiet supply. The C wants +2.5 too and she won\'t
get it; enough is enough.

Ground loops... ?
looks a bit .. well.. much.. some LM317s ?? LOL

We need low dropout linears to save power. LM1117 or preferably
LM2941, whatever we can get.

one switcher with transformer with separate secondary windings for + and - and LM317s to the little voltage steps..
Realy need to know the currents.. and stabilization accuracy.

Total maybe 8 watts. The horrble Zynq may need an amp or more of +1
alone.




It has to all fit into 4 square inches x 0.2 high and use parts we can
get and not splatter a bunch of EMI. Yuk. It\'s like playing a
9-dimensional chess game when you\'re drunk.

Zynq FPGAs are great but real power hogs.

So no LM317 but those LM2576 switchers?

Looks like we can get the cute little TPS5 series of synchronous
switchers. We just scored a reel of TPS562208 for 19 cents each, but
they are 17v max input so we need another part for the first switcher.

I like LM2576, dumb and quiet, but it\'s big and needs a big catch
diode and a giant inductor. Need something else.

I once did a thyristor regulator followed by a transistor regulator to filter the ripple
the tranistor regulator drove the thyristor so there would always be just enough voltage across the series transistor
to filter the ripple..

I can top that. A pre-regulator in the AC line, a giant power resistor
and a shunt thysistor, bang-bang on/off regulation.

Shunt thyristor.. sounds like a crowbar, resistor equals heat dissipation...

 

[John Larkin]

On Mon, 10 Oct 2022 04:52:32 GMT, Jan Panteltje
<pNaonStpealmtje@yahoo.com> wrote:

On a sunny day (Sun, 09 Oct 2022 12:37:01 -0700) it happened John Larkin
jlarkin@highlandSNIPMEtechnology.com> wrote in
5s76khharga8opfcc04s4emtnaq5n2st69@4ax.com>:

On Sun, 09 Oct 2022 17:36:56 GMT, Jan Panteltje
pNaonStpealmtje@yahoo.com> wrote:

On a sunny day (Sun, 09 Oct 2022 08:45:26 -0700) it happened John Larkin
jlarkin@highlandSNIPMEtechnology.com> wrote in
vpp5khtd24t4kd2dkp2auo0iirb8n4bdg6@4ax.com>:

On Sun, 09 Oct 2022 12:01:35 GMT, Jan Panteltje
pNaonStpealmtje@yahoo.com> wrote:

On a sunny day (Sun, 09 Oct 2022 03:12:53 -0700) it happened John Larkin
jlarkin@highlandSNIPMEtechnology.com> wrote in
oa75kh1m7jkagtt3b99969mooc8ljep0r6@4ax.com>:

On Sun, 09 Oct 2022 08:03:46 GMT, Jan Panteltje
pNaonStpealmtje@yahoo.com> wrote:

How to overcome the limits of boost converters:



https://www.electronicdesign.com/power-management/whitepaper/21252189/analog-devices-how-to-overcome-the-limits-of-boost-converters

This brings me back to designing TV horizontal output transformers and HV circuits...

Maybe be y\'r tesla will run faster...

?

But anyways, nice article, but nothing like designing and building one yourself and finding out.


He jumps to \"in conclusion\" too soon. There\'s capacitances to worry
about, and inductor saturation.

I like to use a dual-winding inductor, like the DRQ series, and build
an autotransformer boost converter, which helps get high output
voltage.

The old CRT TV flyback was very interesting
64 uS line time, few uS flyback time, 25 kV HV tuned, linear current in deflection coil... S correction..
plus some pincussion corrections for color TV.
Later ones had a voltage multiplier.
Early ones a PD100 stabilizer triode on the 25 kV.
I have kept one CRT color monitor in the attic, my personal particle accelerator!

My first CRT scope used a BW 43 cm CRT and an old car ignition coil driven by an audio amplifier at a few kHz
for HV and deflection. Not very linear but great fun, Tube diode as HV rectifier.

For real HV:
https://www.ebay.com/itm/202430566213

I have one, 20kV is more what it looks like

PMT HV supply:
http://panteltje.com/pub/PMT_regulated_power_supply_diagram_img_3182.jpg

Or this PMT circuit, some kV:
http://panteltje.com/panteltje/pic/sc_pic/





Here\'s a small HV supply:

https://www.dropbox.com/s/e3n5af9sw1a1flh/28S840A_3.pdf?dl=0

LTC3803 is a great little chip.

Interesting, that switch S2 to lower the voltage
Also that LED in series with the 78L15 to get to 17 V, I have used LEDs as zeners several times.
Never used that LTC3803, usually program a PIC 18F14K22 as those have a comparator that is hardwired to its PWM
generator so overcurrent trigger works very good and fast, plus ADCs of course, and serial and i2c communication.



The 3803 runs the inductor to a peak current every cycle, which is
cool. It results in a constant-power limit much above Vin, rather than
constant-current.





I\'m currently designing the power supplies for a new delay generator
box. Input is from a +12 or +24 wart, either has to work. The design
engineer C wants +20Q, +5Q, +4Q, +3.3, +1.8, +1.35, +1, -6, and -5Q,
where Q means a very quiet supply. The C wants +2.5 too and she won\'t
get it; enough is enough.

Ground loops... ?
looks a bit .. well.. much.. some LM317s ?? LOL

We need low dropout linears to save power. LM1117 or preferably
LM2941, whatever we can get.

one switcher with transformer with separate secondary windings for + and - and LM317s to the little voltage steps..
Realy need to know the currents.. and stabilization accuracy.

Total maybe 8 watts. The horrble Zynq may need an amp or more of +1
alone.




It has to all fit into 4 square inches x 0.2 high and use parts we can
get and not splatter a bunch of EMI. Yuk. It\'s like playing a
9-dimensional chess game when you\'re drunk.

Zynq FPGAs are great but real power hogs.

So no LM317 but those LM2576 switchers?

Looks like we can get the cute little TPS5 series of synchronous
switchers. We just scored a reel of TPS562208 for 19 cents each, but
they are 17v max input so we need another part for the first switcher.

I like LM2576, dumb and quiet, but it\'s big and needs a big catch
diode and a giant inductor. Need something else.

I once did a thyristor regulator followed by a transistor regulator to filter the ripple
the tranistor regulator drove the thyristor so there would always be just enough voltage across the series transistor
to filter the ripple..

I can top that. A pre-regulator in the AC line, a giant power resistor
and a shunt thysistor, bang-bang on/off regulation.

Shunt thyristor.. sounds like a crowbar, resistor equals heat dissipation...

Not a crowbar. The thyristor shorted the series resistor when the
voltage to a big amp was low. That softened the powerup surge too.

This idea fatigued to death a bunch of big metal-case military-style
250 watt wirewound resistors. These types worked:

https://www.dropbox.com/s/0hbgfkvvg3xf6cg/Welwyn.JPG?raw=1

Thick film on porcelain steel. Very tough.

 

[Jan Panteltje]

On a sunny day (Mon, 10 Oct 2022 08:01:04 -0700) it happened John Larkin
<jlarkin@highlandSNIPMEtechnology.com> wrote in
<ahc8kh1ha4givus6pmtq46r1e72kbpv2ee@4ax.com>:

On Mon, 10 Oct 2022 04:52:32 GMT, Jan Panteltje
pNaonStpealmtje@yahoo.com> wrote:

On a sunny day (Sun, 09 Oct 2022 12:37:01 -0700) it happened John Larkin
jlarkin@highlandSNIPMEtechnology.com> wrote in
5s76khharga8opfcc04s4emtnaq5n2st69@4ax.com>:

On Sun, 09 Oct 2022 17:36:56 GMT, Jan Panteltje
pNaonStpealmtje@yahoo.com> wrote:

On a sunny day (Sun, 09 Oct 2022 08:45:26 -0700) it happened John Larkin
jlarkin@highlandSNIPMEtechnology.com> wrote in
vpp5khtd24t4kd2dkp2auo0iirb8n4bdg6@4ax.com>:

On Sun, 09 Oct 2022 12:01:35 GMT, Jan Panteltje
pNaonStpealmtje@yahoo.com> wrote:

On a sunny day (Sun, 09 Oct 2022 03:12:53 -0700) it happened John Larkin
jlarkin@highlandSNIPMEtechnology.com> wrote in
oa75kh1m7jkagtt3b99969mooc8ljep0r6@4ax.com>:

On Sun, 09 Oct 2022 08:03:46 GMT, Jan Panteltje
pNaonStpealmtje@yahoo.com> wrote:

How to overcome the limits of boost converters:




https://www.electronicdesign.com/power-management/whitepaper/21252189/analog-devices-how-to-overcome-the-limits-of-boost-converters

This brings me back to designing TV horizontal output transformers and HV circuits...

Maybe be y\'r tesla will run faster...

?

But anyways, nice article, but nothing like designing and building one yourself and finding out.


He jumps to \"in conclusion\" too soon. There\'s capacitances to worry
about, and inductor saturation.

I like to use a dual-winding inductor, like the DRQ series, and build
an autotransformer boost converter, which helps get high output
voltage.

The old CRT TV flyback was very interesting
64 uS line time, few uS flyback time, 25 kV HV tuned, linear current in deflection coil... S correction..
plus some pincussion corrections for color TV.
Later ones had a voltage multiplier.
Early ones a PD100 stabilizer triode on the 25 kV.
I have kept one CRT color monitor in the attic, my personal particle accelerator!

My first CRT scope used a BW 43 cm CRT and an old car ignition coil driven by an audio amplifier at a few kHz
for HV and deflection. Not very linear but great fun, Tube diode as HV rectifier.

For real HV:
https://www.ebay.com/itm/202430566213

I have one, 20kV is more what it looks like

PMT HV supply:
http://panteltje.com/pub/PMT_regulated_power_supply_diagram_img_3182.jpg

Or this PMT circuit, some kV:
http://panteltje.com/panteltje/pic/sc_pic/





Here\'s a small HV supply:

https://www.dropbox.com/s/e3n5af9sw1a1flh/28S840A_3.pdf?dl=0

LTC3803 is a great little chip.

Interesting, that switch S2 to lower the voltage
Also that LED in series with the 78L15 to get to 17 V, I have used LEDs as zeners several times.
Never used that LTC3803, usually program a PIC 18F14K22 as those have a comparator that is hardwired to its PWM
generator so overcurrent trigger works very good and fast, plus ADCs of course, and serial and i2c communication.



The 3803 runs the inductor to a peak current every cycle, which is
cool. It results in a constant-power limit much above Vin, rather than
constant-current.





I\'m currently designing the power supplies for a new delay generator
box. Input is from a +12 or +24 wart, either has to work. The design
engineer C wants +20Q, +5Q, +4Q, +3.3, +1.8, +1.35, +1, -6, and -5Q,
where Q means a very quiet supply. The C wants +2.5 too and she won\'t
get it; enough is enough.

Ground loops... ?
looks a bit .. well.. much.. some LM317s ?? LOL

We need low dropout linears to save power. LM1117 or preferably
LM2941, whatever we can get.

one switcher with transformer with separate secondary windings for + and - and LM317s to the little voltage steps..
Realy need to know the currents.. and stabilization accuracy.

Total maybe 8 watts. The horrble Zynq may need an amp or more of +1
alone.




It has to all fit into 4 square inches x 0.2 high and use parts we can
get and not splatter a bunch of EMI. Yuk. It\'s like playing a
9-dimensional chess game when you\'re drunk.

Zynq FPGAs are great but real power hogs.

So no LM317 but those LM2576 switchers?

Looks like we can get the cute little TPS5 series of synchronous
switchers. We just scored a reel of TPS562208 for 19 cents each, but
they are 17v max input so we need another part for the first switcher.

I like LM2576, dumb and quiet, but it\'s big and needs a big catch
diode and a giant inductor. Need something else.

I once did a thyristor regulator followed by a transistor regulator to filter the ripple
the tranistor regulator drove the thyristor so there would always be just enough voltage across the series transistor
to filter the ripple..

I can top that. A pre-regulator in the AC line, a giant power resistor
and a shunt thysistor, bang-bang on/off regulation.

Shunt thyristor.. sounds like a crowbar, resistor equals heat dissipation...


Not a crowbar. The thyristor shorted the series resistor when the
voltage to a big amp was low. That softened the powerup surge too.

Ah, got it now

This idea fatigued to death a bunch of big metal-case military-style
250 watt wirewound resistors. These types worked:

https://www.dropbox.com/s/0hbgfkvvg3xf6cg/Welwyn.JPG?raw=1

Thick film on porcelain steel. Very tough.

I am still using these:
http://panteltje.com/pub/power_resistors_IMG_6291.JPG
little bit of heatsink.

And have this:
http://panteltje.com/pub/250W_1_GHz_dummy_load_IMG_4563.JPG

things are getting ever smaller, in a big country like the US one would think \'space enough\' but no,
or do they expect it to fall apart to such a small size ;-)

In the old days, NTC resistors in the first Philips color TV sets, K6 circuit diagram:
http://server.idemdito.org/pcs/elec/18/k6-aa.png
see top left for many, one looked like a big black piece of coal.
One in series with the heaters, one in series with the DC power, one in series with the degaussing coils...

Evolution from tubes to transistors in their color TVs:
http://server.idemdito.org/blog/histo/tv/televisie-2.htm

Brings back memories...
things / circuits have gotten so much simpler with everything in chips
but the knowledge for how it really works is worth gold, to be able to do it
even with normal components, as we now see with the chip shortage.

I have the distinct impression current civilization is sort of stuck

or moving backward, I see things here done bad that would not have happened
that way in the seventies... carelessness or incompetence...
you are lucky if you have competent people working for you,
hard to find any here these days it seems.

 

[John Larkin]

On Mon, 10 Oct 2022 16:17:49 GMT, Jan Panteltje
<pNaonStpealmtje@yahoo.com> wrote:

On a sunny day (Mon, 10 Oct 2022 08:01:04 -0700) it happened John Larkin
jlarkin@highlandSNIPMEtechnology.com> wrote in
ahc8kh1ha4givus6pmtq46r1e72kbpv2ee@4ax.com>:

On Mon, 10 Oct 2022 04:52:32 GMT, Jan Panteltje
pNaonStpealmtje@yahoo.com> wrote:

On a sunny day (Sun, 09 Oct 2022 12:37:01 -0700) it happened John Larkin
jlarkin@highlandSNIPMEtechnology.com> wrote in
5s76khharga8opfcc04s4emtnaq5n2st69@4ax.com>:

On Sun, 09 Oct 2022 17:36:56 GMT, Jan Panteltje
pNaonStpealmtje@yahoo.com> wrote:

On a sunny day (Sun, 09 Oct 2022 08:45:26 -0700) it happened John Larkin
jlarkin@highlandSNIPMEtechnology.com> wrote in
vpp5khtd24t4kd2dkp2auo0iirb8n4bdg6@4ax.com>:

On Sun, 09 Oct 2022 12:01:35 GMT, Jan Panteltje
pNaonStpealmtje@yahoo.com> wrote:

On a sunny day (Sun, 09 Oct 2022 03:12:53 -0700) it happened John Larkin
jlarkin@highlandSNIPMEtechnology.com> wrote in
oa75kh1m7jkagtt3b99969mooc8ljep0r6@4ax.com>:

On Sun, 09 Oct 2022 08:03:46 GMT, Jan Panteltje
pNaonStpealmtje@yahoo.com> wrote:

How to overcome the limits of boost converters:




https://www.electronicdesign.com/power-management/whitepaper/21252189/analog-devices-how-to-overcome-the-limits-of-boost-converters

This brings me back to designing TV horizontal output transformers and HV circuits...

Maybe be y\'r tesla will run faster...

?

But anyways, nice article, but nothing like designing and building one yourself and finding out.


He jumps to \"in conclusion\" too soon. There\'s capacitances to worry
about, and inductor saturation.

I like to use a dual-winding inductor, like the DRQ series, and build
an autotransformer boost converter, which helps get high output
voltage.

The old CRT TV flyback was very interesting
64 uS line time, few uS flyback time, 25 kV HV tuned, linear current in deflection coil... S correction..
plus some pincussion corrections for color TV.
Later ones had a voltage multiplier.
Early ones a PD100 stabilizer triode on the 25 kV.
I have kept one CRT color monitor in the attic, my personal particle accelerator!

My first CRT scope used a BW 43 cm CRT and an old car ignition coil driven by an audio amplifier at a few kHz
for HV and deflection. Not very linear but great fun, Tube diode as HV rectifier.

For real HV:
https://www.ebay.com/itm/202430566213

I have one, 20kV is more what it looks like

PMT HV supply:
http://panteltje.com/pub/PMT_regulated_power_supply_diagram_img_3182.jpg

Or this PMT circuit, some kV:
http://panteltje.com/panteltje/pic/sc_pic/





Here\'s a small HV supply:

https://www.dropbox.com/s/e3n5af9sw1a1flh/28S840A_3.pdf?dl=0

LTC3803 is a great little chip.

Interesting, that switch S2 to lower the voltage
Also that LED in series with the 78L15 to get to 17 V, I have used LEDs as zeners several times.
Never used that LTC3803, usually program a PIC 18F14K22 as those have a comparator that is hardwired to its PWM
generator so overcurrent trigger works very good and fast, plus ADCs of course, and serial and i2c communication.



The 3803 runs the inductor to a peak current every cycle, which is
cool. It results in a constant-power limit much above Vin, rather than
constant-current.





I\'m currently designing the power supplies for a new delay generator
box. Input is from a +12 or +24 wart, either has to work. The design
engineer C wants +20Q, +5Q, +4Q, +3.3, +1.8, +1.35, +1, -6, and -5Q,
where Q means a very quiet supply. The C wants +2.5 too and she won\'t
get it; enough is enough.

Ground loops... ?
looks a bit .. well.. much.. some LM317s ?? LOL

We need low dropout linears to save power. LM1117 or preferably
LM2941, whatever we can get.

one switcher with transformer with separate secondary windings for + and - and LM317s to the little voltage steps..
Realy need to know the currents.. and stabilization accuracy.

Total maybe 8 watts. The horrble Zynq may need an amp or more of +1
alone.




It has to all fit into 4 square inches x 0.2 high and use parts we can
get and not splatter a bunch of EMI. Yuk. It\'s like playing a
9-dimensional chess game when you\'re drunk.

Zynq FPGAs are great but real power hogs.

So no LM317 but those LM2576 switchers?

Looks like we can get the cute little TPS5 series of synchronous
switchers. We just scored a reel of TPS562208 for 19 cents each, but
they are 17v max input so we need another part for the first switcher.

I like LM2576, dumb and quiet, but it\'s big and needs a big catch
diode and a giant inductor. Need something else.

I once did a thyristor regulator followed by a transistor regulator to filter the ripple
the tranistor regulator drove the thyristor so there would always be just enough voltage across the series transistor
to filter the ripple..

I can top that. A pre-regulator in the AC line, a giant power resistor
and a shunt thysistor, bang-bang on/off regulation.

Shunt thyristor.. sounds like a crowbar, resistor equals heat dissipation...


Not a crowbar. The thyristor shorted the series resistor when the
voltage to a big amp was low. That softened the powerup surge too.

Ah, got it now

This idea fatigued to death a bunch of big metal-case military-style
250 watt wirewound resistors. These types worked:

https://www.dropbox.com/s/0hbgfkvvg3xf6cg/Welwyn.JPG?raw=1

Thick film on porcelain steel. Very tough.

I am still using these:
http://panteltje.com/pub/power_resistors_IMG_6291.JPG
little bit of heatsink.

My regulation scheme destroyed that style of resistor. After some
months they would short to the case.

And have this:
http://panteltje.com/pub/250W_1_GHz_dummy_load_IMG_4563.JPG

things are getting ever smaller, in a big country like the US one would think \'space enough\' but no,
or do they expect it to fall apart to such a small size ;-)

In the old days, NTC resistors in the first Philips color TV sets, K6 circuit diagram:
http://server.idemdito.org/pcs/elec/18/k6-aa.png
see top left for many, one looked like a big black piece of coal.
One in series with the heaters, one in series with the DC power, one in series with the degaussing coils...

Evolution from tubes to transistors in their color TVs:
http://server.idemdito.org/blog/histo/tv/televisie-2.htm

Brings back memories...
things / circuits have gotten so much simpler with everything in chips
but the knowledge for how it really works is worth gold, to be able to do it
even with normal components, as we now see with the chip shortage.

I have the distinct impression current civilization is sort of stuck

or moving backward, I see things here done bad that would not have happened
that way in the seventies... carelessness or incompetence...
you are lucky if you have competent people working for you,
hard to find any here these days it seems.

I blame Microsoft.

 

[Jan Panteltje]

On a sunny day (Mon, 10 Oct 2022 09:30:09 -0700) it happened John Larkin
<jlarkin@highlandSNIPMEtechnology.com> wrote in
<d0i8khplkcgi9o26hq7lvbn0i2mqfi71fg@4ax.com>:

On Mon, 10 Oct 2022 16:17:49 GMT, Jan Panteltje
pNaonStpealmtje@yahoo.com> wrote:

On a sunny day (Mon, 10 Oct 2022 08:01:04 -0700) it happened John Larkin
jlarkin@highlandSNIPMEtechnology.com> wrote in
ahc8kh1ha4givus6pmtq46r1e72kbpv2ee@4ax.com>:

On Mon, 10 Oct 2022 04:52:32 GMT, Jan Panteltje
pNaonStpealmtje@yahoo.com> wrote:

On a sunny day (Sun, 09 Oct 2022 12:37:01 -0700) it happened John Larkin
jlarkin@highlandSNIPMEtechnology.com> wrote in
5s76khharga8opfcc04s4emtnaq5n2st69@4ax.com>:

On Sun, 09 Oct 2022 17:36:56 GMT, Jan Panteltje
pNaonStpealmtje@yahoo.com> wrote:

On a sunny day (Sun, 09 Oct 2022 08:45:26 -0700) it happened John Larkin
jlarkin@highlandSNIPMEtechnology.com> wrote in
vpp5khtd24t4kd2dkp2auo0iirb8n4bdg6@4ax.com>:

On Sun, 09 Oct 2022 12:01:35 GMT, Jan Panteltje
pNaonStpealmtje@yahoo.com> wrote:

On a sunny day (Sun, 09 Oct 2022 03:12:53 -0700) it happened John Larkin
jlarkin@highlandSNIPMEtechnology.com> wrote in
oa75kh1m7jkagtt3b99969mooc8ljep0r6@4ax.com>:

On Sun, 09 Oct 2022 08:03:46 GMT, Jan Panteltje
pNaonStpealmtje@yahoo.com> wrote:

How to overcome the limits of boost converters:





https://www.electronicdesign.com/power-management/whitepaper/21252189/analog-devices-how-to-overcome-the-limits-of-boost-converters

This brings me back to designing TV horizontal output transformers and HV circuits...

Maybe be y\'r tesla will run faster...

?

But anyways, nice article, but nothing like designing and building one yourself and finding out.


He jumps to \"in conclusion\" too soon. There\'s capacitances to worry
about, and inductor saturation.

I like to use a dual-winding inductor, like the DRQ series, and build
an autotransformer boost converter, which helps get high output
voltage.

The old CRT TV flyback was very interesting
64 uS line time, few uS flyback time, 25 kV HV tuned, linear current in deflection coil... S correction..
plus some pincussion corrections for color TV.
Later ones had a voltage multiplier.
Early ones a PD100 stabilizer triode on the 25 kV.
I have kept one CRT color monitor in the attic, my personal particle accelerator!

My first CRT scope used a BW 43 cm CRT and an old car ignition coil driven by an audio amplifier at a few kHz
for HV and deflection. Not very linear but great fun, Tube diode as HV rectifier.

For real HV:
https://www.ebay.com/itm/202430566213

I have one, 20kV is more what it looks like

PMT HV supply:
http://panteltje.com/pub/PMT_regulated_power_supply_diagram_img_3182.jpg

Or this PMT circuit, some kV:
http://panteltje.com/panteltje/pic/sc_pic/





Here\'s a small HV supply:

https://www.dropbox.com/s/e3n5af9sw1a1flh/28S840A_3.pdf?dl=0

LTC3803 is a great little chip.

Interesting, that switch S2 to lower the voltage
Also that LED in series with the 78L15 to get to 17 V, I have used LEDs as zeners several times.
Never used that LTC3803, usually program a PIC 18F14K22 as those have a comparator that is hardwired to its PWM
generator so overcurrent trigger works very good and fast, plus ADCs of course, and serial and i2c communication.



The 3803 runs the inductor to a peak current every cycle, which is
cool. It results in a constant-power limit much above Vin, rather than
constant-current.





I\'m currently designing the power supplies for a new delay generator
box. Input is from a +12 or +24 wart, either has to work. The design
engineer C wants +20Q, +5Q, +4Q, +3.3, +1.8, +1.35, +1, -6, and -5Q,
where Q means a very quiet supply. The C wants +2.5 too and she won\'t
get it; enough is enough.

Ground loops... ?
looks a bit .. well.. much.. some LM317s ?? LOL

We need low dropout linears to save power. LM1117 or preferably
LM2941, whatever we can get.

one switcher with transformer with separate secondary windings for + and - and LM317s to the little voltage steps..
Realy need to know the currents.. and stabilization accuracy.

Total maybe 8 watts. The horrble Zynq may need an amp or more of +1
alone.




It has to all fit into 4 square inches x 0.2 high and use parts we can
get and not splatter a bunch of EMI. Yuk. It\'s like playing a
9-dimensional chess game when you\'re drunk.

Zynq FPGAs are great but real power hogs.

So no LM317 but those LM2576 switchers?

Looks like we can get the cute little TPS5 series of synchronous
switchers. We just scored a reel of TPS562208 for 19 cents each, but
they are 17v max input so we need another part for the first switcher.

I like LM2576, dumb and quiet, but it\'s big and needs a big catch
diode and a giant inductor. Need something else.

I once did a thyristor regulator followed by a transistor regulator to filter the ripple
the tranistor regulator drove the thyristor so there would always be just enough voltage across the series transistor
to filter the ripple..

I can top that. A pre-regulator in the AC line, a giant power resistor
and a shunt thysistor, bang-bang on/off regulation.

Shunt thyristor.. sounds like a crowbar, resistor equals heat dissipation...


Not a crowbar. The thyristor shorted the series resistor when the
voltage to a big amp was low. That softened the powerup surge too.

Ah, got it now

This idea fatigued to death a bunch of big metal-case military-style
250 watt wirewound resistors. These types worked:

https://www.dropbox.com/s/0hbgfkvvg3xf6cg/Welwyn.JPG?raw=1

Thick film on porcelain steel. Very tough.

I am still using these:
http://panteltje.com/pub/power_resistors_IMG_6291.JPG
little bit of heatsink.

My regulation scheme destroyed that style of resistor. After some
months they would short to the case.



And have this:
http://panteltje.com/pub/250W_1_GHz_dummy_load_IMG_4563.JPG

things are getting ever smaller, in a big country like the US one would think \'space enough\' but no,
or do they expect it to fall apart to such a small size ;-)

In the old days, NTC resistors in the first Philips color TV sets, K6 circuit diagram:
http://server.idemdito.org/pcs/elec/18/k6-aa.png
see top left for many, one looked like a big black piece of coal.
One in series with the heaters, one in series with the DC power, one in series with the degaussing coils...

Evolution from tubes to transistors in their color TVs:
http://server.idemdito.org/blog/histo/tv/televisie-2.htm

Brings back memories...
things / circuits have gotten so much simpler with everything in chips
but the knowledge for how it really works is worth gold, to be able to do it
even with normal components, as we now see with the chip shortage.

I have the distinct impression current civilization is sort of stuck

or moving backward, I see things here done bad that would not have happened
that way in the seventies... carelessness or incompetence...
you are lucky if you have competent people working for you,
hard to find any here these days it seems.

I blame Microsoft.

Oh, I dunno... sure MS windblows is made for profit only...
bloated at that, open source is nice, Linux is getting more bloated too,
RatHead did its best to make it proprietary by creating incompatibilities and some of that
unfortunately make it into the kernel (dbus comes to mind)...
But on a wider scale than software...:
When the Roman empire collapsed and was concurred by barbarians much of their knowledge and science was lost
Took centuries to get some rebirth in Europe
Now we are ruled by green idiots who oppose our survival it seems
I knew some, one even did not want into the car because it made CO2 and polluted the world...
and that was already in the seventies!!
Now it is much worse...
All shit science, wars coming, US Military Industrial Complex creates those,
only skyscrapers will be left just like the Aztec pyramids
Jippee!!!!

 

[bitrex]

On 10/9/2022 6:12 AM, John Larkin wrote:

On Sun, 09 Oct 2022 08:03:46 GMT, Jan Panteltje
pNaonStpealmtje@yahoo.com> wrote:

How to overcome the limits of boost converters:
https://www.electronicdesign.com/power-management/whitepaper/21252189/analog-devices-how-to-overcome-the-limits-of-boost-converters

This brings me back to designing TV horizontal output transformers and HV circuits...

Maybe be y\'r tesla will run faster...

?

But anyways, nice article, but nothing like designing and building one yourself and finding out.


He jumps to \"in conclusion\" too soon. There\'s capacitances to worry
about, and inductor saturation.

I like to use a dual-winding inductor, like the DRQ series, and build
an autotransformer boost converter, which helps get high output
voltage.

The article this is from calls this dual-winding inductor boost topology
\"novel\" but I find it hard to believe it\'s that novel:

<https://html.scirp.org/file/2-1770466x10.png>

 

[John Larkin]

On Tue, 11 Oct 2022 12:44:07 -0400, bitrex <user@example.net> wrote:

On 10/9/2022 6:12 AM, John Larkin wrote:
On Sun, 09 Oct 2022 08:03:46 GMT, Jan Panteltje
pNaonStpealmtje@yahoo.com> wrote:

How to overcome the limits of boost converters:
https://www.electronicdesign.com/power-management/whitepaper/21252189/analog-devices-how-to-overcome-the-limits-of-boost-converters

This brings me back to designing TV horizontal output transformers and HV circuits...

Maybe be y\'r tesla will run faster...

?

But anyways, nice article, but nothing like designing and building one yourself and finding out.


He jumps to \"in conclusion\" too soon. There\'s capacitances to worry
about, and inductor saturation.

I like to use a dual-winding inductor, like the DRQ series, and build
an autotransformer boost converter, which helps get high output
voltage.


The article this is from calls this dual-winding inductor boost topology
\"novel\" but I find it hard to believe it\'s that novel:

https://html.scirp.org/file/2-1770466x10.png

I hardly think that an autotransformer boost converter is a recent
invention. B+W tube TVs usually did that.

The old points-and-coil car ignition was similar.

 

[Jan Panteltje]

On a sunny day (Tue, 11 Oct 2022 12:44:07 -0400) it happened bitrex
<user@example.net> wrote in <r3h1L.115010$tRy7.76841@fx36.iad>:

On 10/9/2022 6:12 AM, John Larkin wrote:
On Sun, 09 Oct 2022 08:03:46 GMT, Jan Panteltje
pNaonStpealmtje@yahoo.com> wrote:

How to overcome the limits of boost converters:

https://www.electronicdesign.com/power-management/whitepaper/21252189/analog-devices-how-to-overcome-the-limits-of-boost-converters

This brings me back to designing TV horizontal output transformers and HV circuits...

Maybe be y\'r tesla will run faster...

?

But anyways, nice article, but nothing like designing and building one yourself and finding out.


He jumps to \"in conclusion\" too soon. There\'s capacitances to worry
about, and inductor saturation.

I like to use a dual-winding inductor, like the DRQ series, and build
an autotransformer boost converter, which helps get high output
voltage.


The article this is from calls this dual-winding inductor boost topology
\"novel\" but I find it hard to believe it\'s that novel:

https://html.scirp.org/file/2-1770466x10.png

Just the secundary power in series, nothing new,
But why LK2? Not really needed.. same for LK1 if it is not coupled to anything, or is that the \'new\' part?

 

[John Larkin]

On Wed, 12 Oct 2022 04:47:29 GMT, Jan Panteltje
<pNaonStpealmtje@yahoo.com> wrote:

On a sunny day (Tue, 11 Oct 2022 12:44:07 -0400) it happened bitrex
user@example.net> wrote in <r3h1L.115010$tRy7.76841@fx36.iad>:

On 10/9/2022 6:12 AM, John Larkin wrote:
On Sun, 09 Oct 2022 08:03:46 GMT, Jan Panteltje
pNaonStpealmtje@yahoo.com> wrote:

How to overcome the limits of boost converters:

https://www.electronicdesign.com/power-management/whitepaper/21252189/analog-devices-how-to-overcome-the-limits-of-boost-converters

This brings me back to designing TV horizontal output transformers and HV circuits...

Maybe be y\'r tesla will run faster...

?

But anyways, nice article, but nothing like designing and building one yourself and finding out.


He jumps to \"in conclusion\" too soon. There\'s capacitances to worry
about, and inductor saturation.

I like to use a dual-winding inductor, like the DRQ series, and build
an autotransformer boost converter, which helps get high output
voltage.


The article this is from calls this dual-winding inductor boost topology
\"novel\" but I find it hard to believe it\'s that novel:

https://html.scirp.org/file/2-1770466x10.png

Just the secundary power in series, nothing new,
But why LK2? Not really needed.. same for LK1 if it is not coupled to anything, or is that the \'new\' part?

They probably represent the leakage inductances in a simulation.

 

[Anthony William Sloman]

On Wednesday, October 12, 2022 at 4:05:23 PM UTC+11, John Larkin wrote:

On Wed, 12 Oct 2022 04:47:29 GMT, Jan Panteltje<pNaonSt...@yahoo.com> wrote:
On a sunny day (Tue, 11 Oct 2022 12:44:07 -0400) it happened bitrex <us...@example.net> wrote in <r3h1L.115010$tRy7....@fx36.iad>:
On 10/9/2022 6:12 AM, John Larkin wrote:
On Sun, 09 Oct 2022 08:03:46 GMT, Jan Panteltje <pNaonSt...@yahoo.com> wrote:

<snip>

But why LK2? Not really needed.. same for LK1 if it is not coupled to anything, or is that the \'new\' part?

They probably represent the leakage inductances in a simulation.

The way you represent \"leakage inductance\" in an LTSpice simulation of a pair of coupled inductors is by picking the right coupling factor k in the

string L1 L2 K, where K can vary from almost one (for very tightly coupled coils) to something very close to zero for very loosely coupled coils.

You don\'t add an extra inductor.

--
Bill Sloman, Sydney

 

[Jan Panteltje]

On a sunny day (Tue, 11 Oct 2022 22:05:11 -0700) it happened John Larkin
<jlarkin@highlandSNIPMEtechnology.com> wrote in
<njickhtm3f84iivphu2r8dcd1e4vjskt6a@4ax.com>:

On Wed, 12 Oct 2022 04:47:29 GMT, Jan Panteltje
pNaonStpealmtje@yahoo.com> wrote:

On a sunny day (Tue, 11 Oct 2022 12:44:07 -0400) it happened bitrex
user@example.net> wrote in <r3h1L.115010$tRy7.76841@fx36.iad>:

On 10/9/2022 6:12 AM, John Larkin wrote:
On Sun, 09 Oct 2022 08:03:46 GMT, Jan Panteltje
pNaonStpealmtje@yahoo.com> wrote:

How to overcome the limits of boost converters:


https://www.electronicdesign.com/power-management/whitepaper/21252189/analog-devices-how-to-overcome-the-limits-of-boost-converters

This brings me back to designing TV horizontal output transformers and HV circuits...

Maybe be y\'r tesla will run faster...

?

But anyways, nice article, but nothing like designing and building one yourself and finding out.


He jumps to \"in conclusion\" too soon. There\'s capacitances to worry
about, and inductor saturation.

I like to use a dual-winding inductor, like the DRQ series, and build
an autotransformer boost converter, which helps get high output
voltage.


The article this is from calls this dual-winding inductor boost topology
\"novel\" but I find it hard to believe it\'s that novel:

https://html.scirp.org/file/2-1770466x10.png

Just the secundary power in series, nothing new,
But why LK2? Not really needed.. same for LK1 if it is not coupled to anything, or is that the \'new\' part?


They probably represent the leakage inductances in a simulation.

Would here be a market for that: \'leakage inductors\' ? ;-)
I mean targeting simulations using designers.... \"do
not forget the leakage inductors!\" sort of commercial..
hehe

World upside down...