Hi everyone.

Talking with a friend, he told me there is a big difference when you make a voltage multiplier with + or with - output using high voltage and a transformer as sourse of AC.



The first one is with + output between point 1 ground and point 3 + output

The second one is with - output between point 1 ground and point 3 - output

He says when you use a negative output the high voltage can go trough the secondary of the transformer burnig it. I can´t see that. I´m missing something. Instead explaining me he said I should drwa the circuit to see it, but I can´t see it.

Could anyone help me?

Thank you

 

Hi everyone.

Talking with a friend, he told me there is a big difference when you make a voltage multiplier with + or with - output using high voltage and a transformer as sourse of AC.

View attachment 349319

The first one is with + output between point 1 ground and point 3 + output

The second one is with - output between point 1 ground and point 3 - output

He says when you use a negative output the high voltage can go trough the secondary of the transformer burnig it. I can´t see that. I´m missing something. Instead explaining me he said I should drwa the circuit to see it, but I can´t see it.

Could anyone help me?

Thank you

Transformer insulation is not aware of the polarity!

 

perhaps this makes it a bit clearer

 

Transformer insulation is not aware of the polarity!

Yes, is what I think

perhaps this makes it a bit clearer

View attachment 349325

Thank you, but I don´t understand

 

hi Ruf,
PM's plots show + and - Volts output are equal in magnitide.
E

 

So there is no difference between both setups right?

 

there is a difference but only one... the polarity is different.

if you look at top graph you can see that current draw is normal (slightly higher until each multiplier stage is charged).
output voltage and load currents magnitudes are the same.
i labeled individual stages (+,++,+++ and -,--,---) so you can observe symmetry at different points, and see how voltage scales up as more stages are added.

 

Thank you!