|
Good morning everyone, first of all I apologize for my English, some idiomatic expressions may seem strange, as I am using a translator. I am having the following difficulty with LTspice, when making a transformer (mutual inductance) it is not working correctly, apparently acting as a transition detector. Sometimes it works correctly, but as the circuit progresses it simply stops working. Attached is a small didactic circuit, which although unsuitable for practical use I am using didactically, it started working well, but when I implemented the oscillator with the ne555 it simply stopped working. I have already tested it by changing the series resistance of the inductor, among other attempts. I have placed a print screen of the result I am getting in the file area. https://groups.io/g/LTspice/files/Temp/withsband_voltage_tester.tar.gzAm I doing something wrong? Thanks for your help, --
Carlos Delfino Celular: (85) 985-205-490 (OI) - Aquiraz/CE
|
You did a few things wrong.
Firstly, what you uploaded was not zip file. .tar.gz archives are
not natively accessible to Windows users (~98% of our users).
Secondly, you didn't provide a model for the TIP31C.
I tried substituting a 2N3055, which is in the standard library, but
the results were not the same as in your picture. Please - if you
insist on uploading pictures, upload them to Photos.
You have been group member long enough to know the guidelines
(rules).
One more thing: your picture shows that you plotted V(N004). This is
a bad idea, because could it is an auto-generated name, and could
change at any time you edit your schematic. Give plotted nodes a
name, then they are fixed.
--
Regards,
Tony
On 15/10/2024 17:23, Carlos Delfino
wrote:
Good
morning everyone, first of all I apologize for my English, some
idiomatic expressions may seem strange, as I am using a
translator.
I am having the following difficulty with LTspice, when making a
transformer (mutual inductance) it is not working correctly,
apparently acting as a transition detector. Sometimes it works
correctly, but as the circuit progresses it simply stops working.
Attached is a small didactic circuit, which although unsuitable
for practical use I am using didactically, it started working
well, but when I implemented the oscillator with the ne555 it
simply stopped working.
I have already tested it by changing the series resistance of the
inductor, among other attempts.
I have placed a print screen of the result I am getting in the
file area. https://groups.io/g/LTspice/files/Temp/withsband_voltage_tester.tar.gz
Am I doing something wrong?
|
The only compressed file format we use here is
.ZIP. Your . ASC won't run correctly, because you have not
supplied the model for the TIP31C. But in any case, the 555
doesn't appear to be producing a waveform suitable for running a
Cockroft-Walton multiplier. There does not appear to be any sign
that the transformer is not working correctly. You have
specified the inductances, but they might be too low for the
frequency of operation, and the coupling factor K, which is
sufficient. The turns ratio is 20: is that what you want?
On 2024-10-15 17:17, Jerry Lee Marcel
wrote:
Don't post files that we can't open (what is a .gz file?), post
your .asc file in the Temp folder and let us know you have.
Le 15/10/2024 à 17:23, Carlos Delfino
a écrit :
Good
morning everyone, first of all I apologize for my English,
some idiomatic expressions may seem strange, as I am using a
translator.
I am having the following difficulty with LTspice, when
making a transformer (mutual inductance) it is not working
correctly, apparently acting as a transition detector.
Sometimes it works correctly, but as the circuit progresses
it simply stops working.
Attached is a small didactic circuit, which although
unsuitable for practical use I am using didactically, it
started working well, but when I implemented the oscillator
with the ne555 it simply stopped working.
I have already tested it by changing the series resistance
of the inductor, among other attempts.
I have placed a print screen of the result I am getting in
the file area. https://groups.io/g/LTspice/files/Temp/withsband_voltage_tester.tar.gz
Am I doing something wrong?
Thanks for your help,
--
Carlos Delfino
Celular: (85) 985-205-490 (OI) -
Aquiraz/CE
--
OOO - Own Opinions Only
Best Wishes
John Woodgate
Keep trying
|
|
|
Correction: the waveform driving the base of
the TIP31C through the resistor R1 is OK. But the transformer
inductances need to be much larger.
On 2024-10-15 17:36, John Woodgate
wrote:
The only compressed file format we use here
is .ZIP. Your . ASC won't run correctly, because you have
not supplied the model for the TIP31C. But in any case, the
555 doesn't appear to be producing a waveform suitable for
running a Cockroft-Walton multiplier. There does not appear to
be any sign that the transformer is not working correctly. You
have specified the inductances, but they might be too low for
the frequency of operation, and the coupling factor K, which
is sufficient. The turns ratio is 20: is that what you want?
On 2024-10-15 17:17, Jerry Lee Marcel
wrote:
Don't post files that we can't open (what is a .gz file?),
post your .asc file in the Temp folder and let us know you
have.
Le 15/10/2024 à 17:23, Carlos
Delfino a écrit :
Good
morning everyone, first of all I apologize for my English,
some idiomatic expressions may seem strange, as I am using
a translator.
I am having the following difficulty with LTspice, when
making a transformer (mutual inductance) it is not working
correctly, apparently acting as a transition detector.
Sometimes it works correctly, but as the circuit
progresses it simply stops working.
Attached is a small didactic circuit, which although
unsuitable for practical use I am using didactically, it
started working well, but when I implemented the
oscillator with the ne555 it simply stopped working.
I have already tested it by changing the series resistance
of the inductor, among other attempts.
I have placed a print screen of the result I am getting in
the file area. https://groups.io/g/LTspice/files/Temp/withsband_voltage_tester.tar.gz
Am I doing something wrong?
Thanks for your help,
--
Carlos Delfino
Celular: (85) 985-205-490 (OI) -
Aquiraz/CE
--
OOO - Own Opinions Only
Best Wishes
John Woodgate
Keep trying
--
OOO - Own Opinions Only
Best Wishes
John Woodgate
Keep trying
|
In addition to the inductance change, I added an output capacitor and load resistor on each output, 1uF and 1Meg.
Increasing L1 to 10mH (and L2 to {40*L1} ), it seems to work fine, if a bit slow, approaching +/-820NDC
I don’t know what your required output voltage and load current are, but this is a very good starting point.
Dave
переключити цитоване повідомлення
Показати цитований текст
From: LTspice@groups.io <LTspice@groups.io>
On Behalf Of John Woodgate
Sent: Tuesday, October 15, 2024 9:58 AM
To: LTspice@groups.io
Subject: EXTERNAL: Re: [LTspice] mutual inductor/transforme not working
Correction: the waveform driving the base of the TIP31C through the resistor R1 is OK. But the transformer inductances need to be much larger.
On 2024-10-15 17:36, John Woodgate wrote:
The only compressed file format we use here is .ZIP. Your . ASC won't run correctly, because you have not supplied the model for the TIP31C. But in any case, the 555 doesn't appear to be producing a waveform
suitable for running a Cockroft-Walton multiplier. There does not appear to be any sign that the transformer is not working correctly. You have specified the inductances, but they might be too low for the frequency of operation, and the coupling factor K,
which is sufficient. The turns ratio is 20: is that what you want?
On 2024-10-15 17:17, Jerry Lee Marcel wrote:
Don't post files that we can't open (what is a .gz file?), post your .asc file in the Temp folder and let us know you have.
Le 15/10/2024 à 17:23, Carlos Delfino a écrit :
Good morning everyone, first of all I apologize for my English, some idiomatic expressions may seem strange, as I am using a translator.
I am having the following difficulty with LTspice, when making a transformer (mutual inductance) it is not working correctly, apparently acting as a transition detector. Sometimes it works correctly, but as the circuit progresses it simply stops working.
Attached is a small didactic circuit, which although unsuitable for practical use I am using didactically, it started working well, but when I implemented the oscillator with the ne555 it simply stopped working.
I have already tested it by changing the series resistance of the inductor, among other attempts.
I have placed a print screen of the result I am getting in the file area. https://groups.io/g/LTspice/files/Temp/withsband_voltage_tester.tar.gz
Am I doing something wrong?
Thanks for your help,
Celular: (85) 985-205-490 (OI) - Aquiraz/CE
--
OOO - Own Opinions Only
Best Wishes
John Woodgate
Keep trying
--
OOO - Own Opinions Only
Best Wishes
John Woodgate
Keep trying
|
--
Carlos Delfino Celular: (85) 985-205-490 (OI) - Aquiraz/CE
In addition to the inductance change, I added an output capacitor and load resistor on each output, 1uF and 1Meg.
Increasing L1 to 10mH (and L2 to {40*L1} ), it seems to work fine, if a bit slow, approaching +/-820NDC
I don’t know what your required output voltage and load current are, but this is a very good starting point.
Dave
Correction: the waveform driving the base of the TIP31C through the resistor R1 is OK. But the transformer inductances need to be much larger.
On 2024-10-15 17:36, John Woodgate wrote:
The only compressed file format we use here is .ZIP. Your . ASC won't run correctly, because you have not supplied the model for the TIP31C. But in any case, the 555 doesn't appear to be producing a waveform
suitable for running a Cockroft-Walton multiplier. There does not appear to be any sign that the transformer is not working correctly. You have specified the inductances, but they might be too low for the frequency of operation, and the coupling factor K,
which is sufficient. The turns ratio is 20: is that what you want?
On 2024-10-15 17:17, Jerry Lee Marcel wrote:
Don't post files that we can't open (what is a .gz file?), post your .asc file in the Temp folder and let us know you have.
Le 15/10/2024 à 17:23, Carlos Delfino a écrit :
Good morning everyone, first of all I apologize for my English, some idiomatic expressions may seem strange, as I am using a translator.
I am having the following difficulty with LTspice, when making a transformer (mutual inductance) it is not working correctly, apparently acting as a transition detector. Sometimes it works correctly, but as the circuit progresses it simply stops working.
Attached is a small didactic circuit, which although unsuitable for practical use I am using didactically, it started working well, but when I implemented the oscillator with the ne555 it simply stopped working.
I have already tested it by changing the series resistance of the inductor, among other attempts.
I have placed a print screen of the result I am getting in the file area. https://groups.io/g/LTspice/files/Temp/withsband_voltage_tester.tar.gz
Am I doing something wrong?
Thanks for your help,
Celular: (85) 985-205-490 (OI) - Aquiraz/CE
--
OOO - Own Opinions Only
Best Wishes
John Woodgate
Keep trying
--
OOO - Own Opinions Only
Best Wishes
John Woodgate
Keep trying
|
On Tue, Oct 15, 2024 at 01:33 PM, Carlos Delfino wrote:
Why did you not change the inductance values yet? They are MUCH too small for the frequency you used. That is the main problem with your circuit, which makes the voltage and current waveforms seem odd.
You also still did not include the TIP31C model. The simulation can't be run without the model.
The transformer works. You just used it incorrectly.
Andy
|
Sorry for not providing the transistor models, I thought it was native to ltspice.
About the file format, I posted the asc and the printscreen separately in the photos section.
Forgive me, I forgot to make the adjustment on the net, giving it a new one.
--
Carlos Delfino Celular: (85) 985-205-490 (OI) - Aquiraz/CE
Correction: the waveform driving the base of
the TIP31C through the resistor R1 is OK. But the transformer
inductances need to be much larger.
On 2024-10-15 17:36, John Woodgate
wrote:
The only compressed file format we use here
is .ZIP. Your . ASC won't run correctly, because you have
not supplied the model for the TIP31C. But in any case, the
555 doesn't appear to be producing a waveform suitable for
running a Cockroft-Walton multiplier. There does not appear to
be any sign that the transformer is not working correctly. You
have specified the inductances, but they might be too low for
the frequency of operation, and the coupling factor K, which
is sufficient. The turns ratio is 20: is that what you want?
On 2024-10-15 17:17, Jerry Lee Marcel
wrote:
Don't post files that we can't open (what is a .gz file?),
post your .asc file in the Temp folder and let us know you
have.
Le 15/10/2024 à 17:23, Carlos
Delfino a écrit :
Good
morning everyone, first of all I apologize for my English,
some idiomatic expressions may seem strange, as I am using
a translator.
I am having the following difficulty with LTspice, when
making a transformer (mutual inductance) it is not working
correctly, apparently acting as a transition detector.
Sometimes it works correctly, but as the circuit
progresses it simply stops working.
Attached is a small didactic circuit, which although
unsuitable for practical use I am using didactically, it
started working well, but when I implemented the
oscillator with the ne555 it simply stopped working.
I have already tested it by changing the series resistance
of the inductor, among other attempts.
I have placed a print screen of the result I am getting in
the file area. https://groups.io/g/LTspice/files/Temp/withsband_voltage_tester.tar.gz
Am I doing something wrong?
Thanks for your help,
--
Carlos Delfino
Celular: (85) 985-205-490 (OI) -
Aquiraz/CE
--
OOO - Own Opinions Only
Best Wishes
John Woodgate
Keep trying
--
OOO - Own Opinions Only
Best Wishes
John Woodgate
Keep trying
|
Yes, to do the withsband voltage tester I need a voltage close to 1000V (1KV) or even higher, so the idea is to use a common inverted transformer.
Leaving aside the didactic issue of the circuit, I am concerned in practice whether a common transformer and the tip31 would be able to withstand in the primary circuit the peak current needed to power the Cockcroft-Walton circuit of the secondary.
--
Carlos Delfino Celular: (85) 985-205-490 (OI) - Aquiraz/CE
The only compressed file format we use here is
.ZIP. Your . ASC won't run correctly, because you have not
supplied the model for the TIP31C. But in any case, the 555
doesn't appear to be producing a waveform suitable for running a
Cockroft-Walton multiplier. There does not appear to be any sign
that the transformer is not working correctly. You have
specified the inductances, but they might be too low for the
frequency of operation, and the coupling factor K, which is
sufficient. The turns ratio is 20: is that what you want?
On 2024-10-15 17:17, Jerry Lee Marcel
wrote:
Don't post files that we can't open (what is a .gz file?), post
your .asc file in the Temp folder and let us know you have.
Le 15/10/2024 à 17:23, Carlos Delfino
a écrit :
Good
morning everyone, first of all I apologize for my English,
some idiomatic expressions may seem strange, as I am using a
translator.
I am having the following difficulty with LTspice, when
making a transformer (mutual inductance) it is not working
correctly, apparently acting as a transition detector.
Sometimes it works correctly, but as the circuit progresses
it simply stops working.
Attached is a small didactic circuit, which although
unsuitable for practical use I am using didactically, it
started working well, but when I implemented the oscillator
with the ne555 it simply stopped working.
I have already tested it by changing the series resistance
of the inductor, among other attempts.
I have placed a print screen of the result I am getting in
the file area. https://groups.io/g/LTspice/files/Temp/withsband_voltage_tester.tar.gz
Am I doing something wrong?
Thanks for your help,
--
Carlos Delfino
Celular: (85) 985-205-490 (OI) -
Aquiraz/CE
--
OOO - Own Opinions Only
Best Wishes
John Woodgate
Keep trying
|
Is that 1kV each output to return or Positive output to Negative output?
переключити цитоване повідомлення
Показати цитований текст
From: LTspice@groups.io <LTspice@groups.io> On Behalf Of
Carlos Delfino
Sent: Tuesday, October 15, 2024 11:28 AM
To: LTspice@groups.io
Subject: EXTERNAL: Re: [LTspice] mutual inductor/transforme not working
Yes, to do the withsband voltage tester I need a voltage close to 1000V (1KV) or even higher, so the idea is to use a common inverted transformer.
|
LTspice will show you the currents in the
transistor and the transformer windings. For the transistor,
compare the simulated current with the data sheet. For the
transformer, you have to choose the wire size that will carry
the required current without getting too hot.
On 2024-10-15 19:28, Carlos Delfino
wrote:
Yes,
to do the withsband voltage tester I need a voltage close to
1000V (1KV) or even higher, so the idea is to use a common
inverted transformer.
Leaving aside the didactic issue of the circuit, I am
concerned in practice whether a common transformer and the
tip31 would be able to withstand in the primary circuit the
peak current needed to power the Cockcroft-Walton circuit of
the secondary.
--
Carlos Delfino
Celular: (85) 985-205-490 (OI) -
Aquiraz/CE
The only compressed file format we use
here is .ZIP. Your . ASC won't run correctly, because
you have not supplied the model for the TIP31C. But in
any case, the 555 doesn't appear to be producing a
waveform suitable for running a Cockroft-Walton
multiplier. There does not appear to be any sign that
the transformer is not working correctly. You have
specified the inductances, but they might be too low for
the frequency of operation, and the coupling factor K,
which is sufficient. The turns ratio is 20: is that what
you want?
On 2024-10-15 17:17, Jerry Lee Marcel wrote:
Don't post files that we can't open (what is a .gz
file?), post your .asc file in the Temp folder and let
us know you have.
Le 15/10/2024 à 17:23, Carlos Delfino a écrit :
Good
morning everyone, first of all I apologize for my
English, some idiomatic expressions may seem
strange, as I am using a translator.
I am having the following difficulty with LTspice,
when making a transformer (mutual inductance) it is
not working correctly, apparently acting as a
transition detector. Sometimes it works correctly,
but as the circuit progresses it simply stops
working.
Attached is a small didactic circuit, which although
unsuitable for practical use I am using
didactically, it started working well, but when I
implemented the oscillator with the ne555 it simply
stopped working.
I have already tested it by changing the series
resistance of the inductor, among other attempts.
I have placed a print screen of the result I am
getting in the file area. https://groups.io/g/LTspice/files/Temp/withsband_voltage_tester.tar.gz
Am I doing something wrong?
Thanks for your help,
--
Carlos Delfino
Celular: (85) 985-205-490 (OI) -
Aquiraz/CE
--
OOO - Own Opinions Only
Best Wishes
John Woodgate
Keep trying
--
OOO - Own Opinions Only
Best Wishes
John Woodgate
Keep trying
|
I am quite confused about the correct inductance for the transformer. I based it on the following tutorials, but only the second one superficially mentions the formula for calculating the coupling coefficient, if I understood correctly:
I raised the inductance values to mH, but then ltspice crashes in the simulation. I still don't know how to correctly calculate the inductance for this type of use.
ps. the tip31c model:
.MODEL TIP31C NPN(IS=1.62181E-13 ISE=1.75416E-11 ISC=4.36516E-14 XTI=3 BF=80 BR=20.607 IKF=6.98433 IKR=0.997156 XTB=1.5301 VAF=110.5 VAR=159.374 VJE=0.636 VJC=0.408 RE=0.56 RC=0.96 RB=164.793 RBM=0.100291 IRB=1.24287E-7 CJE=4.77E-10 CJC=7.29E-11 XCJC=0.589205 FC=0.5 NF=0.9899 NR=0.989511 NE=1.95 NC=1.014 MJE=0.327 MJC=0.339 TF=2.3733E-8 TR=1.0000E-8 ITF=1 VTF=10 XTF=10 EG=1.1605 KF=1E-9 AF=1 VCEO=100 ICRATING=3 MFG=NSC-FAIRCHILD)
--
Carlos Delfino Celular: (85) 985-205-490 (OI) - Aquiraz/CE
On Tue, Oct 15, 2024 at 01:33 PM, Carlos Delfino wrote:
Why did you not change the inductance values yet? They are MUCH too small for the frequency you used. That is the main problem with your circuit, which makes the voltage and current waveforms seem odd.
You also still did not include the TIP31C model. The simulation can't be run without the model.
The transformer works. You just used it incorrectly.
Andy
|
--
Carlos Delfino Celular: (85) 985-205-490 (OI) - Aquiraz/CE
LTspice will show you the currents in the
transistor and the transformer windings. For the transistor,
compare the simulated current with the data sheet. For the
transformer, you have to choose the wire size that will carry
the required current without getting too hot.
On 2024-10-15 19:28, Carlos Delfino
wrote:
Yes,
to do the withsband voltage tester I need a voltage close to
1000V (1KV) or even higher, so the idea is to use a common
inverted transformer.
Leaving aside the didactic issue of the circuit, I am
concerned in practice whether a common transformer and the
tip31 would be able to withstand in the primary circuit the
peak current needed to power the Cockcroft-Walton circuit of
the secondary.
--
Carlos Delfino
Celular: (85) 985-205-490 (OI) -
Aquiraz/CE
The only compressed file format we use
here is .ZIP. Your . ASC won't run correctly, because
you have not supplied the model for the TIP31C. But in
any case, the 555 doesn't appear to be producing a
waveform suitable for running a Cockroft-Walton
multiplier. There does not appear to be any sign that
the transformer is not working correctly. You have
specified the inductances, but they might be too low for
the frequency of operation, and the coupling factor K,
which is sufficient. The turns ratio is 20: is that what
you want?
On 2024-10-15 17:17, Jerry Lee Marcel wrote:
Don't post files that we can't open (what is a .gz
file?), post your .asc file in the Temp folder and let
us know you have.
Le 15/10/2024 à 17:23, Carlos Delfino a écrit :
Good
morning everyone, first of all I apologize for my
English, some idiomatic expressions may seem
strange, as I am using a translator.
I am having the following difficulty with LTspice,
when making a transformer (mutual inductance) it is
not working correctly, apparently acting as a
transition detector. Sometimes it works correctly,
but as the circuit progresses it simply stops
working.
Attached is a small didactic circuit, which although
unsuitable for practical use I am using
didactically, it started working well, but when I
implemented the oscillator with the ne555 it simply
stopped working.
I have already tested it by changing the series
resistance of the inductor, among other attempts.
I have placed a print screen of the result I am
getting in the file area. https://groups.io/g/LTspice/files/Temp/withsband_voltage_tester.tar.gz
Am I doing something wrong?
Thanks for your help,
--
Carlos Delfino
Celular: (85) 985-205-490 (OI) -
Aquiraz/CE
--
OOO - Own Opinions Only
Best Wishes
John Woodgate
Keep trying
--
OOO - Own Opinions Only
Best Wishes
John Woodgate
Keep trying
|
Bell, I didn't understand your question.
--
Carlos Delfino Celular: (85) 985-205-490 (OI) - Aquiraz/CE
Is that 1kV each output to return or Positive output to Negative output?
Yes, to do the withsband voltage tester I need a voltage close to 1000V (1KV) or even higher, so the idea is to use a common inverted transformer.
|
To calculate the inductance, you need to know
the input resistance of the CW circuit AND is load. Connect a
square wave source of the voltage you required (240V peak?) to
the CW network directly, and get the input current from the
simulation. Divide the input voltage by that current to get the
effective load resistance. Make the inductive reactance of the
transformer secondary at least 3 times, preferably more, than
that resistance. From that, you can calculate the inductance.
On 2024-10-15 19:40, Carlos Delfino
wrote:
I am
quite confused about the correct inductance for the
transformer. I based it on the following tutorials, but only
the second one superficially mentions the formula for
calculating the coupling coefficient, if I understood
correctly:
I
raised the inductance values to mH, but then ltspice crashes
in the simulation. I still don't know how to correctly
calculate the inductance for this type of use.
ps.
the
tip31c model:
.MODEL TIP31C NPN(IS=1.62181E-13 ISE=1.75416E-11
ISC=4.36516E-14 XTI=3 BF=80 BR=20.607 IKF=6.98433 IKR=0.997156
XTB=1.5301 VAF=110.5 VAR=159.374 VJE=0.636 VJC=0.408 RE=0.56
RC=0.96 RB=164.793 RBM=0.100291 IRB=1.24287E-7 CJE=4.77E-10
CJC=7.29E-11 XCJC=0.589205 FC=0.5 NF=0.9899 NR=0.989511
NE=1.95 NC=1.014 MJE=0.327 MJC=0.339 TF=2.3733E-8 TR=1.0000E-8
ITF=1 VTF=10 XTF=10 EG=1.1605 KF=1E-9 AF=1 VCEO=100 ICRATING=3
MFG=NSC-FAIRCHILD)
--
Carlos Delfino
Celular: (85) 985-205-490 (OI) -
Aquiraz/CE
On Tue, Oct 15, 2024 at 01:33 PM, Carlos Delfino wrote:
Why did you not change the inductance values yet? They
are MUCH too small for the frequency you used. That is the
main problem with your circuit, which makes the voltage and
current waveforms seem odd.
You also still did not include the TIP31C model. The
simulation can't be run without the model.
The transformer works. You just used it incorrectly.
Andy
--
OOO - Own Opinions Only
Best Wishes
John Woodgate
Keep trying
|
You MUST have output capacitors to accept and build the pulses into real charge.
Dave
переключити цитоване повідомлення
Показати цитований текст
From: LTspice@groups.io <LTspice@groups.io> On Behalf Of
Carlos Delfino
Sent: Tuesday, October 15, 2024 11:58 AM
To: LTspice@groups.io
Subject: EXTERNAL: Re: [LTspice] mutual inductor/transforme not working
Celular: (85) 985-205-490 (OI) - Aquiraz/CE
LTspice will show you the currents in the transistor and the transformer windings. For the transistor, compare the simulated current with the data sheet. For the transformer, you have to choose the wire size that
will carry the required current without getting too hot.
On 2024-10-15 19:28, Carlos Delfino wrote:
Yes, to do the withsband voltage tester I need a voltage close to 1000V (1KV) or even higher, so the idea is to use a common inverted transformer.
Leaving aside the didactic issue of the circuit, I am concerned in practice whether a common transformer and the tip31 would be able to withstand in the primary circuit the peak current needed to power the Cockcroft-Walton circuit of the secondary.
Celular: (85) 985-205-490 (OI) - Aquiraz/CE
The only compressed file format we use here is .ZIP. Your . ASC won't run correctly, because you have not supplied the model for the TIP31C. But in any case, the 555 doesn't appear to be producing a waveform
suitable for running a Cockroft-Walton multiplier. There does not appear to be any sign that the transformer is not working correctly. You have specified the inductances, but they might be too low for the frequency of operation, and the coupling factor K,
which is sufficient. The turns ratio is 20: is that what you want?
On 2024-10-15 17:17, Jerry Lee Marcel wrote:
Don't post files that we can't open (what is a .gz file?), post your .asc file in the Temp folder and let us know you have.
Le 15/10/2024 à 17:23, Carlos Delfino a écrit :
Good morning everyone, first of all I apologize for my English, some idiomatic expressions may seem strange, as I am using a translator.
I am having the following difficulty with LTspice, when making a transformer (mutual inductance) it is not working correctly, apparently acting as a transition detector. Sometimes it works correctly, but as the circuit progresses it simply stops working.
Attached is a small didactic circuit, which although unsuitable for practical use I am using didactically, it started working well, but when I implemented the oscillator with the ne555 it simply stopped working.
I have already tested it by changing the series resistance of the inductor, among other attempts.
I have placed a print screen of the result I am getting in the file area. https://groups.io/g/LTspice/files/Temp/withsband_voltage_tester.tar.gz
Am I doing something wrong?
Thanks for your help,
Celular: (85) 985-205-490 (OI) - Aquiraz/CE
--
OOO - Own Opinions Only
Best Wishes
John Woodgate
Keep trying
--
OOO - Own Opinions Only
Best Wishes
John Woodgate
Keep trying
|
What Ic current do you want the TIP31P peak at?
At the moment, it is limited by base current (base resistor too high).
If the TIP31C can't handle enough, use another in parallel.
-- Regards, Tony
On 15 Oct 2024 20:28, Carlos Delfino <consultoria@...> wrote: Yes, to do the withsband voltage tester I need a voltage close to 1000V (1KV) or even higher, so the idea is to use a common inverted transformer.
Leaving aside the didactic issue of the circuit, I am concerned in practice whether a common transformer and the tip31 would be able to withstand in the primary circuit the peak current needed to power the Cockcroft-Walton circuit of the secondary.
--
Carlos Delfino Celular: (85) 985-205-490 (OI) - Aquiraz/CE
The only compressed file format we use here is
.ZIP. Your . ASC won't run correctly, because you have not
supplied the model for the TIP31C. But in any case, the 555
doesn't appear to be producing a waveform suitable for running a
Cockroft-Walton multiplier. There does not appear to be any sign
that the transformer is not working correctly. You have
specified the inductances, but they might be too low for the
frequency of operation, and the coupling factor K, which is
sufficient. The turns ratio is 20: is that what you want?
On 2024-10-15 17:17, Jerry Lee Marcel
wrote:
Don't post files that we can't open (what is a .gz file?), post
your .asc file in the Temp folder and let us know you have.
Le 15/10/2024 à 17:23, Carlos Delfino
a écrit :
Good
morning everyone, first of all I apologize for my English,
some idiomatic expressions may seem strange, as I am using a
translator.
I am having the following difficulty with LTspice, when
making a transformer (mutual inductance) it is not working
correctly, apparently acting as a transition detector.
Sometimes it works correctly, but as the circuit progresses
it simply stops working.
Attached is a small didactic circuit, which although
unsuitable for practical use I am using didactically, it
started working well, but when I implemented the oscillator
with the ne555 it simply stopped working.
I have already tested it by changing the series resistance
of the inductor, among other attempts.
I have placed a print screen of the result I am getting in
the file area. https://groups.io/g/LTspice/files/Temp/withsband_voltage_tester.tar.gz
Am I doing something wrong?
Thanks for your help,
--
Carlos Delfino
Celular: (85) 985-205-490 (OI) -
Aquiraz/CE
--
OOO - Own Opinions Only
Best Wishes
John Woodgate
Keep trying
|
You have two outputs, Pos and Neg.
Are you looking for 1kV or more, between those outputs, or from either one to return?
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Показати цитований текст
From: LTspice@groups.io <LTspice@groups.io> On Behalf Of
Carlos Delfino
Sent: Tuesday, October 15, 2024 11:59 AM
To: LTspice@groups.io
Subject: EXTERNAL: Re: [LTspice] mutual inductor/transforme not working
Bell, I didn't understand your question.
Celular: (85) 985-205-490 (OI) - Aquiraz/CE
Is that 1kV each output to return or Positive output to Negative output?
Yes, to do the withsband voltage tester I need a voltage close to 1000V (1KV) or even higher, so the idea
is to use a common inverted transformer.
|
O resistor foi definido pelo autor original do circuito, mas vejo que haverá uma demanda de pico inicial para a carga do circuito, Cockroft-Walton
In English:
The resistor was set by the original author of the circuit, but I see that there will be an initial peak demand for the circuit load, Cockroft-Walton
--
Carlos Delfino
Celular: (85) 985-205-490 (OI) - Aquiraz/CE
What Ic current do you want the TIP31P peak at?
At the moment, it is limited by base current (base resistor too high).
If the TIP31C can't handle enough, use another in parallel.
--
Regards,
Tony
|
Tony Casey
John Woodgate
Bell, Dave