Moderator: kabubi
But the winding left much to be desired. I understand that the fill window needs to be filled up, meaning lots of turns, to bring up inductance for good low frequency response. The window in the transformer I disassembled was only about 70% filled. Also, there were only 3 secondary sections and 2 primary sections. Again, it is my belief that more interleaving will improve high frequency response. When I started unwinding the core, I found that the insulation between the primary and secondary sections was only .1 mm thick. I understand that you need a thicker insulation at this point, not so much for electrical insulation, but to lower distributed capacitance, to reduce unwanted ultrasonic oscillations that result in ringing. Finally, the primary section was scramble rather than layer wound.
6a3fan wrote:UK AC is 50 hertz. Could this be a factor for the UK power tranny running hot? Or should it in fact run cooler at 60 hertz?
alexg wrote:6a3fan wrote:UK AC is 50 hertz. Could this be a factor for the UK power tranny running hot? Or should it in fact run cooler at 60 hertz?
Running hot for a power transformer means that the size of the core is a bit small for the requirement. The core material might also be a factor (inferior core material, hotter power tranny).
I have seen local transformers used in restorations gets very hot!
UK AC is 50 hertz. Could this be a factor for the UK power tranny running hot? Or should it in fact run cooler at 60 hertz?
tony wrote:
transformers can be designed in more ways than one, what is your pick?
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