Ramped PLL SSTC - IRFP260 Half Bridge

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This my the PLL coil after some modifications to the GDT. And the addition of Primary Current Feedback.

The Fets now run nice and cool.

- Resonant frequency is 130Khz
- Voltage is 195/200v AC Half Wave rectified.
- Primary current feedback (originally secondary)
- Coil is the same 8x4 inch 30g
- Primary is tapped on 7
- Half Bridge is two IRFP260N
- 14nf Primary Cap, 2KV rating.
- Staccato is Steve Wards circuit
- 4046 Phase Lock Loop
- 2 x UCC37322 Drivers for the FET

The Staccato has a strange bug which is occasionally resetting the circuit. That's the horrible noise and the change of frequency you can hear/see every now and again.

Thanks for watching.
Deeds ;)

Nic, you're are right, primary current feedback was the way to go. Thanks man.
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130khz dang that is pretty low frequency, I need to try one of those big coils, lower frequency makes it easy to push more power

rodriguezfranco
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Sheesh I need to build me one of those half bridges, I am getting bored of the single fet coils

rodriguezfranco
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