I am designing a high voltage DC/DC converter that is for an aerospace application and therefore I am focusing on reducing the size and weight, so switching at a high frequency possibly integrating wide band-gap semiconductor devices. However, switching at high frequencies with the typical wire wound transformers has its limitations. Therefore I started to research the use of planar transformers.
However with high voltage applications (in the kV range, with low current in the 100’s mA range), planar transformers are not typically used because of the insulation ratings and the like.
My question is: how viable is it to design both high voltage and high frequency transformers? What will be the main things to be worried about?
If anyone has any references/guides for designing high voltage, high frequency planar transformers, or any reference designs, please do guide me to them. Any general tips for their design, how to insulate them, manage eddy currents and proximity effects at these levels etc will also be appreciated.
The SMPS topology will likely be a form of parallel resonant converter to enable reduction of switching losses.