[12V DC ==> 500 V &/OR 1000 V the best topology to this design?]

I have one battery of car, I think that it is possible have 4000 WATS of power, but I'm not sure about this. I would like have a modified square-wave ( maximum duty cycle is 35 % and frequency is from5 Hz to 130 Hz). I was thinking about two converters. First I use a Mosfet + a pulse transformer to one output of  500V and then with another pulse transformer to second output of 1000V!

[12V DC ==> 500 V &/OR 1000 V the best topology to this design?]

I'm working about a converter. I need to have two outputs of 500 V and 1000 V from 12 V DC (one general battery). The maximum duty cycle is 35 % and frequency is from5 Hz to 130 Hz.


My doubt is about the best topology to this design.



Thanks in advance