Siemens Aktiengesellschaft

Jörg Weiss

Thomas Komma

Karsten Handt

Stefan Hänsel

Richard Schmidt

Stephan Rupf

Thomas Kiendl

Andreas Rampold

Josef Götz

Boris Kuschel

Uwe Baumbach

Various embodiments of the teachings herein include a DC network comprising: an electrical conductor; a switching unit arranged at one end of the conductor to break the electrical connection via the conductor, the switching unit including a controllable power semiconductor connected in series in the current path of the conductor; wherein the conductor includes a first section and a second section starting from the switching unit with a connection point between the first section and the second section; a first overvoltage protection apparatus connected between the connecting point and a second pole of the DC network; and a second overvoltage protection apparatus connected between that end of the second section remote from the switching unit and the second pole. The overvoltage protection apparatuses each have a capacitor.

DC network

A battery charging system for cablelessly charging a battery includes a primary-side charging unit as a primary side, a secondary-side charging unit as a secondary side, a transformer having a primary-side winding as part of the primary side and a secondary-side winding as part of the secondary side, one controller on the primary side and one controller on the secondary side, one voltage sensor on the primary side and one voltage sensor on the secondary side, one current sensor on the primary side and one current sensor on the secondary side, one communication unit on the primary side and one communication unit on the secondary side, and one direct current converter provided on the primary side only.

Battery charging system and method for cableless charging of a battery with voltage and current sensors on both the primary and secondary sides and a DC-DC converter on the primary side involved in an efficiency calibration power loop

A power supply includes a storage capacitor which can be charged with a rectified input current by means of a current-limiting element which is controlled by a drive circuit. The direct-axis component of current and the direct-axis component of voltage on the current limiting element are supplied to the control circuit as input values and the current limiting element is controlled in such a way that it is not subjected to more than a predetermined maximum power loss.

Power supply with low loss making current limitation

Growing community of inventors

Chemnitz, Germany

Jörg Weiss