A power electronic converter includes a plurality of converter cells, each comprising an inductive power transfer stage having a coupled inductor coupling first and second sides of the converter cell, wherein the inductor comprises a first winding around a first magnetic core and a second winding around a second magnetic core; wherein the first winding and the first magnetic core are separated from the second winding and the second magnetic core by a flat electric insulation layer that provides electric insulation between the first and second sides of the converter cell; wherein at least two of the coupled inductors are arranged so that their insulation layers form a single contiguous insulation layer.

An electric power converter includes an electric gatedriver circuit that includes a transformer. The transformer includes separate first and second cores of magnetically conductive material that are shaped to form respective closed loops. The transformer also includes a first electrical conductor with at least one winding arranged around a part of the first core in a first winding direction and at least one winding arranged around a part of the second core in a second winding direction opposite the first winding direction. The transformer further includes a second electrical conductor with at least one winding arranged around a part of the first core in the first winding direction and at least one winding arranged around a part of the second core in the second winding direction so as to counteract electric influence induced by a common magnetic field through the closed loops of the first and second cores.

According to one configuration, an inductor device includes a first electrically conductive path; a second electrically conductive path, the first electrically conductive path electrically isolated from the second electrically conductive path; first material, the first material operative to space the first electrically conductive path with respect to the second electrically conductive path; and second material. The second material has a substantially higher magnetic permeability than the first material. An assembly of the first electrically conductive path, the second electrically conductive path, and the first material resides in a core of the second material.

An isolated bidirectional converter and a method for controlling the same are provided. A primary winding or a secondary winding of a transformer module in the isolated bidirectional converter is connected in parallel with a first branch includes a first inductor and a first current sensor that arc connected in series, A current flowing through the first inductor is acquired by the first current sensor, and is proportional to a current flowing through a magnetizing inductor of the winding. Therefore, the current is controlled by modifying a duty cycle of a switch transistor on a bridge arm in the circuit, so that a. direct current component of a current flowing through the winding is modified indirectly, thereby avoiding magnetic bias on the magnetizing to inductor of the transformer module, and preventing the transformer module from being saturated.

A gatedriver circuit for controlling a power electronic switch. The circuit provides a galvanic separation and is magnetically immune. The gatedriver circuit comprises a transformer arranged with two separate cores of magnetically conductive material each forming a closed loop. A first electrical conductor has windings around a part of both cores, and a second electrical conductor also has windings around part of both cores. The two cores are positioned close to each other to allow mutual magnetic interaction. The windings of the first and second electrical conductors around the first core have the same winding direction, and the windings of the first and second electrical conductors around the second core have opposite winding direction of the windings of the first and second electrical conductors around the first core, so as to counteract electric influence induced by a common magnetic field through the closed loops of the first and second cores. Hereby, such gatedriver circuit is suitable for controlling power switches in environments with strong magnetic fields, e.g. inside a high power wind turbine.

A transformer device includes a transformer circuit having a shape arranged to be connected to another transformer device, and a connector provided on one side of the transformer circuit such that the transformer circuit is connected to a cable connected with another transformer device where the transformer circuit is configured to be connected to a transformer circuit of another transformer device through the cable to increase a voltage or current provided to a load.

Transformer assembly including a first transformer stage having a plurality of first-stage transformer cells; and a second transformer stage. An input of the second transformer stage is connected to an output of the first transformer stage. A lightning impulse breakdown voltage of a transformer cell of the second stage is at least double of a lightning impulse breakdown voltage of transformer cells of the first stage.

An integrated magnetic component is disclosed in this application, which includes an integrated magnetic core and a PCB winding, and there are even-number layers of PCB windings. The integrated magnetic core includes M magnetic pillars that are symmetrically distributed, and every two of the M magnetic pillars form one group. On each layer of PCB winding, a current path is divided into M paths around the M magnetic pillars; after every two of the M current paths are combined, a current obtained through combination flows around one magnetic pillar in each group of magnetic pillars by N turns, and flows around the other magnetic pillar in each group of magnetic pillars by N turns.

A matrix transformer, a power converter, and a matrix transformer winding arrangement method. Each of the magnetic core columns of n sub-transformers of the matrix transformer is wound with a first winding and a second winding, first windings are used to form a high-voltage-side winding of the matrix transformer, and second windings are used to form a low-voltage-side winding of the matrix transformer. A ratio of a turn quantity design value of the high-voltage-side winding to the quantity n of the sub-transformers is not an integer.

An insulating transformer includes a plurality of sub-insulating transformers connected in series. Polarity directions of all sub-windings are identical. When a current I flows from a first main terminal to a third main terminal through the first sub-winding, an interphase capacitance, and the second sub-winding, excitation inductance of the first sub-winding and excitation inductance of the second sub-winding are configured to have opposite polarities.