High frequency transformer having an internally liquid cooled winding.

摘要

A high frequency transformer (10) having a primary winding (11) comprising a hollow coolant turn for transmitting cooling fluid therethrough, and a secondary winding (12) comprising a plurality of conductive turns thermally bonded using adhesive (31) to the primary winding (11). The secondary winding (12) may also be comprised of a hollow coolant turn for transmitting cooling fluid therethrough. The present invention thus uses a hybrid concept, wherein liquid cooling is used on only one to two turns of the primary and/or secondary windings (11, 12) of the transformer (10). The remaining turns of any particular winding are thermally bonded by means of adhesive (31) to the coolant turn, and therefore all the turns are cooled, one directly and the remaining indirectly, for either winding of the transformer (10). The liquid cooled coolant turn may be connected in series with a normally designed high frequency winding, with no deleterious effect on the losses or electrical performance for both the primary and secondary windings (11, 12). The present invention may also be used in constructing an inductively coupled probe for an electric vehicle battery charger.