planar transformer and method for shielding windings in a planar transformer

摘要

the present invention relates to a planar transformer comprising a first winding (201, 413, 514) and a second winding (202, 415, 513), and a third winding (203, 416, 516) and a fourth winding ( 204, 417, 517), which are arranged between the first winding (201, 413, 514) and the second winding (202, 415, 513). in the planar transformer each of the third winding (203, 416, 516) and the fourth winding (204, 417, 517) comprises a shielding turn (208, 209, 418, 419, 518, 519) that covers at least 30 percent from a winding window of the planar transformer, said shield turns (208, 209, 418, 419, 518, 519) being arranged in such a way that the shield turns (208, 209, 418, 419, 518, 519) together they cover at least 50 percent of the winding window. the present invention also relates to a method for shielding windings (201, 202, 413, 415, 513, 514) in a planar transformer.