Sunday, 18 November 2018

switch mode power supply - smps transformer capacitance effects


What are effects of interwinding capacitance in smps power transformer? What is the influence? For example, i have 83khz smps transformer with windings made of litz wire. The capacitance between windings is 250pF (i measured it by short-circuiting both windings and using u1732c agilent RLC meter). Is it good or bad? Is electrostatic shield between primary and secondary helpful to reduce value of inter-winding capacitance?





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