I am developing transformers which have input voltage of 243V and outputs in region of 375-600V. I believe I will use planar transformers. The issue is that although these output voltages are relatively small, I need to isolate the transformer to 12kV. Usually this is done by fully potting the transformer with a silicon compound. I wish to avoid this option.
I have seen some propose that conformally coating each PCB in a high voltage compound before construction within the transformer will give 12kV isolation from the primary to the secondary and to the core.
I’ve had others say that simply adding some Kapton tape between the individual PCBs within the high voltage stack will provide the 12kV - however I do not see how it would provide isolation of the core from the windings.
I believe the conformal coating approach is best but will be more expensive as I will need to find some manufacturers within the U.K. who are able to provide the high voltage conformal coat and test it for the correct isolation.
Has any got any further advice on how best to approach this problem? Does anyone know of any reputable PCB manufacturers preferably within the U.K. who are able to perform these steps and test for high voltage insulation in-house?
I have seen some propose that conformally coating each PCB in a high voltage compound before construction within the transformer will give 12kV isolation from the primary to the secondary and to the core.
I’ve had others say that simply adding some Kapton tape between the individual PCBs within the high voltage stack will provide the 12kV - however I do not see how it would provide isolation of the core from the windings.
I believe the conformal coating approach is best but will be more expensive as I will need to find some manufacturers within the U.K. who are able to provide the high voltage conformal coat and test it for the correct isolation.
Has any got any further advice on how best to approach this problem? Does anyone know of any reputable PCB manufacturers preferably within the U.K. who are able to perform these steps and test for high voltage insulation in-house?