Bayerische Motoren Werke Aktiengesellschaft

Tdk Electronics Ag

Bayerische Motoren Werke Aktiengesellscaft

Manuel Raimann

Fabian Beck

Daniel Weida

Florian Boehm

Matthias Koeppen

A voltage converter is designed to convert an alternating input voltage into a direct output voltage. The voltage converter includes a first sub-converter having a first switch half-bridge, which is coupled to a first pole of the input voltage by a first main coil, and a second sub-converter having a second switch half-bridge, which is coupled to the first pole of the input voltage by a second main coil. In addition, the voltage converter includes a diode half-bridge, which is jointly used by the first sub-converter and the second sub-converter. The voltage converter has a first return coil and a second return coil, which couple a center point of the diode half-bridge to a second pole of the input voltage. The first and second main coils and the first and second return coils form a coupled choke, the coupled choke having a choke core. The choke core has at least one outer leg, which is surrounded by windings of the first and/or second main coil and/or of the first and/or second return coil, and at least one center leg, which is not surrounded by windings of the main coils or of the return coils. The outer leg and the center leg have materials with different permeabilities.

Voltage converter having coupled PFC choke

A storage choke is disclosed. In an embodiment a storage choke includes at least two coils and a core, wherein the core couples the coils to one another, and wherein the core comprises a first region comprising a first material and a second region comprising a second material that is different from the first material.

Storage choke

The invention relates to a combined transformer for an LLC resonant converter. The combined transformer includes a primary transformer winding configured to generate during operation a first magnetic flux, which forms a first magnetic circuit. The combined transformer also includes a resonant inductor having a winding, wherein the resonant inductor is configured to generate during operation a second magnetic flux, which forms a second magnetic circuit. The primary transformer winding and the winding of the resonant inductor are arranged with respect to one another such that at least one first part of the first magnetic circuit and at least one second part of the second magnetic circuit run on a magnetic path common to the first part and to the second part. The invention also relates to an LLC resonant converter with such a combined transformer.

Growing community of inventors

Munich, Germany

Manuel Raimann