There are online designs that use a simple ferrite bolt 50 turn primary and 500 turn seccondary powering one 5 watt CFL. I attempt to customize it with:
Specs: TDK Core
Vin primary= 6V DC
Core material PC40
Saturation at 380 mT
Power output 5,5 Watt
Nominal voltage = 34V
Current nominal = 0.18A
Breakdown voltage: Unknown
Question 1: Is just taking half of the values, so 26 turns primary and 260 turn seccondary adequate or bad practice for my PC40 material core? Or propper approximation? Is your calculus more efficient?
Because my two seperate calculations innitially yielded 4 and 5 turns for primary. I thought this can't be right. And the variables have to be estimated guessed, and I'm pretty bad at that.
Question 2: Can you come up with a better more efficient design by calculus? Or is 4 or 5 turns primary pretty close to optimal here or should I go with 26?, or YOUR value? Can your calculus yield a more efficient N1/N2 for the given specs?
I know that primary inductance leakage plays much less of a role in cfls than in other circuits, but:
Question 3: Is it the primary inductance leakage which causes the voltage spike on the secondary when the load circuit side opens by a glow starter, or even without a starter, when it's normally closed? Or what inductance specifially cause the voltage spike to overcome breakdown voltage?
Thanks for taking a look at this community! I believe together we can solve many electrical problems!