CT's acting funny
Tom540, Sun Nov 19 2006, 10:46AMI noticed something odd with my coil today. When I put my finger on one of the current transformers I noticed that sparks got a lot bigger. The harder I push the bigger the sparks get. I am using the same setup as Steve Ward uses for primary current feedback with two cascaded 33 turn CT's and the Zeners etc. Okay now I'm thinking maybe I need bigger cores for the CT's for better coupling? I have no clue whats going on partialy because it's 3AM and I'm tired. The coil is just a small lash up. I'll post some pics tommorow if I have the chance. Anyone have any idea?
Re: CT's acting funny
Sulaiman, Sun Nov 19 2006, 12:45PM
could be that you're 'earthing' the windings,
try wraping a new wire all over the 33 turns of the CT
and earth ONE end to act as an electrostatic shield
(leave the other end floating)
Sulaiman, Sun Nov 19 2006, 12:45PM
could be that you're 'earthing' the windings,
try wraping a new wire all over the 33 turns of the CT
and earth ONE end to act as an electrostatic shield
(leave the other end floating)
Re: CT's acting funny
Tom540, Mon Nov 20 2006, 02:24AM
Thanks, It didnt work at all that way though. I added another ct with around 10 turns and it seemd to help so im assuming my ct's aren't good enough. I guess I'll need some bigger ferrite cores.
Tom540, Mon Nov 20 2006, 02:24AM
Thanks, It didnt work at all that way though. I added another ct with around 10 turns and it seemd to help so im assuming my ct's aren't good enough. I guess I'll need some bigger ferrite cores.
Re: CT's acting funny
Tom540, Mon Nov 20 2006, 03:32AM
I take that back its still acting weird. It doesnt start up till I touch the ct again.
Tom540, Mon Nov 20 2006, 03:32AM
I take that back its still acting weird. It doesnt start up till I touch the ct again.
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