Robert Boschgmbh

Thomas Plum

Witold Pieper

Stefan Henneck

Felix Stewing

Tobias Diekhans

Stefan Kaessner

Jan Allgeier

The invention relates to a charging device (), comprising: an input-side first terminal (__) for connecting to an electrical energy source (); an output-side second terminal (__) for connecting to a battery () to be charged; and a transformer (), the primary winding (_) of which is electrically connected to the first terminal (__) by means of a primary circuit () and the secondary winding (_) of which is electrically connected to the second terminal (__) by means of a secondary circuit ().

Charging device and method for operating the charging device

The invention relates to a circuit apparatus () for controlling the current flow of the secondary side () of a direct voltage converter, comprising: a controllable switch element () having a first connection (), a second connection () and a control connection (); a snubber circuit, which is electrically coupled to the source connection () and the second connection (); and a control circuit (), which is designed to control a deactivation time of the controllable switch element () via the control connection (); wherein the control circuit () is electrically coupled to the snubber circuit and is designed to control the deactivation time according to an electrical parameter of the coupling.

Circuit apparatus and method for controlling a secondary side of a direct voltage converter

The invention relates to a direct-current voltage converter () for electrical power transmission from a secondary side to a primary side of the direct-current voltage converter (), which has on the primary side an actively clamped flyback converter circuit having a controlled first switch () and a controlled second switch (), and the primary side is inductively coupled to the secondary side. The current of a secondary coil () on the secondary side, for inductive coupling to the primary side, is switched by a single controlled third switch () on the secondary side, and the direct-current voltage converter has a regulator () which, in parts of a regulating cycle, conductively connects the third switch () to the first switch ().

Direct-current voltage converter for bidirectional electrical power transmission from a primary side to a secondary side of the direct-current voltage converter or vice versa

The invention relates to inductive energy transmission from a primary coil () to a secondary coil () having an additional operating state. By means of this two-sided regulation, a primary-side and secondary-side control of the power electronics is performed in accordance with a predetermined operational strategy. Thus, even in the case of unfavorable coupling factors, for example, the efficiency of the inductive energy transmission can be increased, the magnetic field in the air gap between the primary coil () and the secondary coil () can be minimized, and the inductive energy transmission can be optimized. This optimized operational strategy is enabled by means of a newly introduced idle state, which permits periodic short-circuiting of the secondary side by means of switches on the secondary side (S, S) of the inductive energy transmission system. The invention is preferably used in the charging of the battery of an electric vehicle (), but other applications are also possible.

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Cologne, Germany

Thomas Plum