The winding capacitances in magnetic amplifiers

The influence of winding capacitance upon the performance of magnetic amplifiers is a matter of some concern. Although no systematic investigation has appeared in the literature, it is generally accepted in the art that such capacitances may be responsible for certain peculiarities in the transfer characteristic of the self-saturating magnetic amplifier. In this paper a lumped equivalent winding capacitance, connected across the winding terminals, is defined. An approximate, empirical formula is given for it for toroidal core windings. The concept of this equivalent capacitance is shown to be of some value in explaining the experimentally observed behavior of certain types of magnetic amplifiers.