Wiferion Gmbh

Blue Inductive Gmbh

Johannes Tritschler

Benriah Goeldi

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.

Safe operation in wireless power transmission systems

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. In the multiple output operative mode and during the first partial period the multiple output rectifier is adapted to maintain polarity of the AC input signal and to transfer it to the second output terminal and the common output terminal as the first rectified output signal. Further, in the multiple output operative mode and during the second partial period the multiple output rectifier is adapted to reverse polarity of the AC input signal and to transfer it to the first output terminal and the common output terminal as the second rectified output signal. The multiple output rectifier may also comprise a switching circuit component between the first output terminal and the second output terminal to change the multiple output operative mode to a full bridge operative mode and vice versa.

Multiple output rectifier

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.

Inductive power transfer control

An efficient solution to the problem of converting alternating signals into a plurality of signals having different signal characteristics in observation of different application requirements. This is achieved by a multiple input multiple output converter operated at a secondary side of an inductive power transfer system for converting at least one alternating input signal into a rectified alternating input signal and a further signal derived by averaging a switched voltage generated during rectification of the alternating input signal. The multiple input multiple output converter comprises at least one rectifier circuit adapted to rectify the alternating input signal and at least one averaging circuit adapted to average the switched voltage which is generated during rectification operation of the eat least one alternating input signal.

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Freiburg, Germany

Johannes Tritschler