Leakage transformer

A leakage transformer, comprising:

• a first plate and a second plate;
• a plurality of first winding pillars interiorly disposed on the first plate;
• a plurality of second winding pillars interiorly disposed on the second plate and aligned with the plurality of first winding pillars respectively;
• a primary winding wound around the plurality of first winding pillars;
• a secondary winding wound around the plurality of second winding pillars;
• a plurality of magnetic shunt elements, wherein each magnetic shunt element is disposed between a corresponding pair of the first winding pillar and the e ding-second winding pillar, there is a gap between every two neighboring magnetic shunt elements, and a leakage inductance of the leakage transformer is determined by the at least one gap;
• and
• two side pillars, wherein each of the two side pillars is disposed directly between the first plate and the second plate, and wherein each magnetic shunt element is interiorly disposed between the two side pillars,
• wherein the primary winding is split into a plurality of parts wound around the plurality of first winding pillars respectively, and the plurality of parts of the primary winding are connected in series or in parallel;
• the secondary winding is split into a plurality of parts wound around the plurality of second winding pillars respectively, and the plurality of parts of the secondary winding are connected in series or in parallel.