upgraded magnetron driver problem

137

01:36:20

anyone know why the  output of the transformer turns to alternating current even though there are diodes in series? even if i put a 1 meg resister across the terminals, it still creeps into alternating current.

published 4 years ago

HIGreg

4 years ago

I'm not an expert in high-voltage circuits, but it may have something to do with the 2 kV jump in less than 100 ns across a reverse-biased diode.. I think it may be the reverse-bias diode capacitance coupling from the input to the output. Try putting some reasonable parasitics to smooth out the simulation. I used to use 1G resistors or very small caps to ground in low-voltage situations to get better numeric solutions. Better yet, also use realistic diode parameters, if you're not already.

wyoelk

4 years ago

I'm not knowledgeable about MOSFET settings but that can affect output of the circuit

nasaedo

4 years ago

Thanks for the comments, i should have mentioned i was trying to model a carthode ray tube flyback transformer which has a built in 30kv Diode Array, this transformer should be putting out 10kv-20kv. Plus i dont know how to configure the transformer properly. The program config parameters dont match the datasheet for my mosfet either so i just ran with default one.

nasaedo

4 years ago

Oh yeah forgot to mention the transformer should be run on a frequency of 10khz - 25khz.

wyoelk

4 years ago

You might try this post _ _ http://everycircuit.com/circuit/6729638381092864

nasaedo

4 years ago

thanks

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