Design of low parasitic capacitance high frequency high voltage transformer

Abstract

The parasitic capacitance occurred in high voltage transformer due to a large number of secondary windings
was an important problem causing the high frequency response limit and decreasing the transformer efficiency.
This research proposed the reduction of parasitic capacitance technique in high frequency high voltage
transformer. The Teflon bobbin of secondary winding was designed in multi-slots and the winding coil was layered
by with Teflon tape. The experimental results showed that the parasitic capacitance of the constructed transformer
was 90.94% reduced and the frequency resonance was increased from 45 kHz to 94 kHz, at no loaded condition,
comparing to the winding on single slot Teflon bobbin. Besides this technique can reduce the dielectric loss by
effect of parasitic capacitance and diminish the layer to layer voltage of secondary winding.