HeadsUp wrote: Thanks weber
What kind of values would the components need to be ?
At least i can get a rough idea of parts costs for something like that
Will let you know when i find a prius one to strip down
Sorry HeadsUp, but it isn't at all practical to do it that way when you're considering a voltage ratio of around 10:1. Even at 2:1 it probably isn't practical. The reason is that the switching devices have to deal with the high input current and the high output voltage.
I've added the word "theoretical" to the caption of my schematic above (and added the integral diodes I should have included the first time).
Here's a topology that's suitable for DC DC conversion at high power levels and high voltage ratios.
The voltage ratio is fixed by the transformer turns ratio. Here the MOSFETs only have to deal with the high input current and low input voltage, while the IGBT's only have to deal with the high output voltage and low output current. But it still won't be cheap at EV power levels. Possibly more than a 3 phase VF drive (3 phase inverter) of the same power level, which you will still need.
It's one thing to look at schematics of the power-stage topology of a switchmode converter or inverter, and quite another to design one that actually works and isn't just a complicated device for blowing up expensive lumps of silicon.
At first it looks like straightforward digital design, but in fact most of the hard design work is analog design involving "parasitic components" that don't even appear on the schematic but depend on the geometry of how it's all put together.