Flat voltage transformer.

摘要

A low-profile, high-frequency power transformer comprises one or more insulated ferrite slabs (12). In one embodiment a pair of slots (14,16) are defined through the or a stacked array of insulated slabs. A single-turn metallic ribbon conductor (22,24) is then looped through each pair of slots to form a corresponding first and second loop which are coupled in a magnetic flux circuit with each other through the stack. The distance separating one pair of slots (14) is different from the distance separating the other pair of slots (16) so that the loops formed by the ribbons have a corresponding unequal cross-section. Hence the ratio of the voltages on the ribbons is proportional to the ratio of the respective cross-sectional areas of the ribbon loops. In another embodiment, a third ribbon is added having a cross-sectional loop area equivalent to the second ribbon to provide symmetrical single-turn, output coils.