Originally Posted by
shamino
i built this , 220uH L coil ,C is 104 400V,mosfet IRLI540 , 4.7v zener ( tried 6v8 zener) with the same result , Transformer using ferit powder core EI22 ( core area 0.6x0.6 = 0.36cm2 ) primary 17x2 , sec 170 , primary outside sec. . output capacitor is 105 , 630V
its work flawlessly , strong spark , but FET , transformer getting hot when running about 10-15 minutes , i can add heatsink to mosfet , but how about transformer ?
it's get overheat at high rpm(~ 10k rpm) , draw nearly 2A@12V , and resonance frequency drop from 33khz to 24-25khz. tested on test bench and real motocycle ( single cylinder)
i think about limit current to circuit , add some power resistor ?
Hi Shamino
I ask you:
Secondary coil: the bottom?
Primary Coil: top?
https://docs.google.com/file/d/0BxQH...it?usp=sharing
Air gap? (0,1-0,2 mm)
Experiments demonstrate correct 1:10 ratio. Power 12-14V, Secondary voltage~120-140Vx1,41 x2=338--395V)
Use of primary 2x20 winding, secondary 200 winding .
To reduce the ferrite core saturation.
I am using EI28: 2x11 primary winding thread.
Secondary winding 110-120.
No hot components.
Small ferrite cores = low performance.
What kind of performance do you prefer?