High-power pulse transformer for short high-voltage and/or high-current pulses

Claim 1

High-power pulse transformer for short, high-voltage and/or high-current pulses, comprising: a container having walls, a base plate disposed in said container, high-voltage leadthroughs disposed in said container walls, an insulating, cooling dielectric liquid disposed in said container, said dielectric liquid having a given heat transfer coefficient α[w/m 2 · K] with respect to an uncoated metal wall within the range of α 1 ≦α≦α 2 , said uncoated metal wall comprising by definition a metal wall being covered by a thin oxide or lacquer film within the μm-range, the influence of which on the heat transfer coefficient or on the dielectric properties of the couple "metal wall - dielectric liquid" being negligible; at least one magnet core disposed on said base plate in said container, said magnet core having a central window formed therein defining an axis of said window and defining self-enclosed magnet legs disposed around said central window, said core having relatively wide sides normal to said axis of said window and relatively narrow sides; at least one undervoltage winding and at least one overvoltage winding each being disposed in said dielectric liquid, being wrapped in each other around parts of said magnet core immersed in said dielectric liquid and being linked to said magnet core and to each other, said windings including turns of substantially mutually doubly-wound electrically insulated metallic conductors having a given thickness and having terminal winding ends disposed in said leadthroughs, said conductors having surfaces with a heat transfer coefficient α with respect to said dielectric liquid being within said range α 1 ≦α≦α 2 ; said turns of each of said windings being self-supported and spaced apart from said turns of the other of said windings by a first minimum spacing and being spaced from said magnet core by a second minimum spacing; support insulators being partly disposed in said dielectric liquid and being adjacent and spaced from at least one of said sides of said magnet core by a third minimum spacing being greater than the sum of said second minimum spacing and said given thickness of said turns, at least said ends of said windings being secured in recesses formed in said support insulators; and means for retaining said magnet core and said support insulators on said base plate in said container.