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1. 发明申请

WO2021115966A1 MEDIUM FREQUENCY TRANSFORMER WITH PARALLEL WINDINGS 审中-公开
公开(公告)号：WO2021115966A1
公开(公告)日：2021-06-17
申请号：PCT/EP2020/084710
申请日：2020-12-04
申请人： ABB POWER GRIDS SWITZERLAND AG
发明人： DROFENIK, Uwe , RIEDEL, Gernot , GRADINGER, Thomas Bernhard
IPC分类号： H01F27/04 , H01F27/29 , H01F27/32 , H01F27/02 , H01F27/28
摘要： A transformer, in particular a medium frequency transformer for a resonant DC/DC converter or a dual active bridge DC/DC converter, comprising, b) a core, in particular a core having an air gap; c) a first coil surrounding a first section of the core; d) an electric insulation, in particular a medium voltage electric insulation, surrounding the first coil; e) wherein the first coil comprises a plurality of M first windings; f) each of the plurality of M first windings comprising i) a first termination and a second termination, ii) a conductor wound around the first portion of the core in at least one turn between the first and second termination, g) a plurality of M first terminals provided outside of the insulation, each of said first terminals connected to a different one of the first terminations by one of a plurality of M first connectors, thus connecting each first terminal to a respective first termination; the transformer further comprising: h) a first channel extending from an outside of the electric insulation into and at least partially through said electric insulation, wherein the plurality of M first connectors extend through the first channel; wherein i) the plurality of M first connectors are insulated against one another by means of a low voltage insulation within the channel, and wherein preferably no medium voltage and/or high voltage insulation is present between any two of the first connectors; j) the second terminations are connected to one another within or inside the electric insulation; k) a second terminal (421) is provided outside of the electric insulation, and connected to the second terminations by a second connector (423).

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