It sounds like I can get away with just 3 strands then. Is that right?
How were you firing the switching? Is it flipflop where you fire switch 1, and then fire switch 2 and then back to switch 1?
Or is it setup so that you fire switch 1, then off, then fire switch 2, then off, then fire switch 1, etc?
The difference being, The first method noted being back to back firing of the switches, and the second method interspersing off time in between each alternate switch firing.
It seems like the trafo core is only used then to Up the Inductance value of the 14awg strands which at 80ft air core is about 400-500uH of inductance. (at least on a pittsfield coil form). Adding r60 welding rod to the core brought it to 1mH-ish. It also brought the frequency way down. My trifilar 14awg coil runs right now at 30vdc and .8amps and at a frequency of about 12khz-ish. (just noted for reference or comparison)
How long do you hold each switch closed?
What is the frequency you have found to be the most functional?
I did draw out the setup over the weekend and went thru some mental acrobatics trying to understand the flows in the circuit and I think I do understand them now. I don't know that I need to start out that big, but perhaps I do.
Since you noted such big wire as #6 at such low turn counts you would probably have to be running the setup at a high frequency to still be able to dephase the current from the voltage on the inductances.
Good stuff. Thanks for sharing, look forward to further interaction in attempting to understand and then build this device. (add it to the other 30+ things I've built over the last 6-7 years now, hopefully tho this one is showing a cop > 1.
)Take care,
Gene
Originally posted by Matthew Jones
View Post
Leave a comment: