Abstract: A coil pad for wireless power transfer having a back plane and a front plane radiating an electromagnetic field during wireless power transfer, wherein the coil pad has a circumference encompassing an imaginary positioning contour reflecting positioning options for at least one point-to-point communication element to be embedded into the front plane of the coil pad, the imaginary positioning contour has rotational symmetry with respect to a first axis of symmetry and a first axis of symmetry orthogonal to the first axis of symmetry, the first axis of symmetry and the first axis of symmetry intersecting at an origin and defining an imaginary coordinate system for the front plane of the coil pad, and the coil pad includes a first point-to-point communication element embedded into the front plane of the coil pad at a first position being an intersection of the imaginary positioning contour and an imaginary positioning hand extending from the origin of the imaginary coordinate system along a first direction defin

Abstract: A method of operating an inverter circuit in a wireless power transmission device that may include at least one half-bridge with two switching units that each have a parasitic capacitance. In a respective half-bridge, the first switching unit links a plus potential (V+) of a DC source to a half-bridge node and the second switching unit links the half-bridge node to a minus potential (V?) of the DC source. A resonant circuit for the wireless power transmission is connected as a load to the respective half-bridge node, wherein the resonant circuit may include a transmission coil and at least one capacitive element.

Abstract: A mobile side circuit of a wireless power transmission system comprises a mobile side resonant circuit inductively coupled to a stationary side resonant circuit of the wireless power transmission system. A mobile side control circuit is adapted to change the operative mode of a mobile side rectifier upon occurrence of a failure state in the mobile side circuit. The present invention ensures a safe operation of the wireless power transmission system while effectively avoiding damage to the mobile side circuitry upon occurrence of a failure state at the mobile side.

Abstract: A mobile side circuit of a wireless power transmission system comprises a mobile side resonant circuit inductively coupled to a stationary side resonant circuit of the wireless power transmission system. A mobile side control circuit is adapted to change the operative mode of a mobile side rectifier upon occurrence of a failure state in the mobile side circuit. The present invention ensures a safe operation of the wireless power transmission system while effectively avoiding damage to the mobile side circuitry upon occurrence of a failure state at the mobile side.

Abstract: Efficient measures to improve electrical performance in a mobile side output circuitry of a wireless power transmission system are provided. The mobile side circuitry of the wireless power transmission system has a mobile side transformer stage comprising at least one primary side winding and a plurality of secondary side windings. To the plurality of secondary side windings there are connected a plurality of mobile side AC/DC converters. According to a first alternative of the present invention output terminal pairs of the plurality of mobile side AC/DC converters are connected in series. According to a second alternative of the present invention output terminal pairs of the plurality of mobile side AC/DC converters are connected in parallel.

Abstract: A multiple output rectifier achieving effective supply of power to a plurality of loads. The multiple output rectifier converts an AC input signal into a first rectified output signal and a second rectified output signal, wherein the AC input signal has a fundamental period dividing into a first partial period where an AC current flows in a first direction and a second partial period where the AC current flows in a second direction being a reverse direction to the first direction. The multiple output rectifier includes a first input terminal and a second input terminal different from the first input terminal for input of the AC input signal. The multiple output rectifier further includes a common output terminal, a first output terminal, and a second output terminal. The common output terminal, the first output terminal, and the second output terminal are decoupled from each other for operation in a multiple output operative mode.

Abstract: A more efficient solution for a detection of operating conditions in an inductive power transfer system and for improved control of the inductive power transfer system. An operating condition at a secondary side of an inductive power transfer system is detected by measuring at least one electric variable at a primary side of the inductive power transfer system which is dynamically coupled to the operating condition at the secondary side of the inductive power transfer system. Then follows an analysis of the at least one electric variable over time at the primary side of the inductive power transfer system. This allows to detect a change of the operating condition at the secondary side of the inductive power transfer system. Also provided is a control method and related controller apparatus using the detection method.