Multiport transformer and integrated high voltage and low voltage converter

A multiport transformer, comprising:

• a primary winding connected to a first port,
• a secondary winding connected to a second port,
• a tertiary winding connected to a third port, wherein the primary winding, the secondary winding, and the tertiary winding are electrically insulated from one another;
• and
• an integrated magnetic core structure comprising a plurality of magnetically connected cores which are stacked on top of one another along a stacking direction and define winding windows in which the primary winding, the secondary winding, and the tertiary winding are wound;
• wherein the integrated magnetic core structure comprises one first core, one second core, and one third core;
• the first core and the second core are stacked such that the first core and the second core together define at least one first winding window;
• and
• wherein the second core and the third core are stacked such that the second core and the third core together define at least one second winding window.