Transformers: Series + Parallel

[George L.]

Hello,

I have two transformers. One is 220:1 from a camera flash circuit and another completely different transformer is 10:1.

If I wire the primaries in series and the secondaries in parallel...will the total ratio be 230:1?

would really appreciate some help.

thanks,

George L.

 

[Russlk]

The short answer is no. Why do you want to do this? If the purpose is to get more voltage out of the secondary, is the difference between 1:220 and 1:230 worth the trouble? Why not just boost the primary voltage?

 

[DigiTan]

I guess if your voltage was close to the breakdown voltage on the primary it would help. This question's a real noodle-scratcher though, what would the ratio become?

 

[George L.]

Hey,

the reason i am asking is because I have the stun gun project on my breadboard. It can produce 400V at 7mA max. This is using the 220:1 transformer. I need a higher Voltage out. I thought I could put a different 10:1 transformer is series/parallel as described in my first post and get 4000V.

I guess you can't do this, right?

thanks,

George L.

 

[Klaus]

Hey,

the reason i am asking is because I have the stun gun project on my breadboard. It can produce 400V at 7mA max. This is using the 220:1 transformer. I need a higher Voltage out. I thought I could put a different 10:1 transformer is series/parallel as described in my first post and get 4000V.

I guess you can't do this, right?

thanks,

George L.

Perhaps your choice of words "series/parallel" is a bit confusing.
What you can do is feed the secondary of transformer A to the primary of transformer B. This gives you an approximate output of the ratio of A x B at the secondary of B.
However, the primary of B MUST be able to withstand the higher input voltage and the secondary of B the much higher output voltage.
If transformer B is totally encapsulated in epoxy or such you might have a chance but do exercise extreme caution.
Klaus