E.g.o. Elektro-geraetebau Gmbh

E.g.o. Elektro-Gerätebau Gmbh

Ulrich Waechter

Christian Egenter

Max-Felix Mueller

Mathias Bellm

Frank Graff

Thorsten Grunow

Roman Riffel

Henry Kuehn

Fabian Kern

Uwe Hörner

A device () for wirelessly transferring power toward a consumer () by way of inductive coupling, wherein the device () has:

Device for wirelessly transferring power toward a consumer by way of inductive coupling

A method for operating a system having a device for the wireless transmission of energy to an electrical consumer by means of inductive coupling, and an electrical consumer, wherein the device has: a rectifier for generating a DC voltage from a line voltage, an inverter which is fed from the DC voltage and designed to generate a pulse-width-modulated activation signal, a power coil activated by the pulse-width-modulated activation signal, by means of which an alternating magnetic field can be generated to transmit the energy, a communication device designed to exchange data bi-directionally with the electrical consumer, and a regulator designed to regulate a power output by the inverter to a predetermined setpoint, and wherein the electrical consumer has: a switching device for changing the load impedance of the electrical consumer, and a communication device designed to exchange data bi-directionally with the device, wherein the method comprises the steps: synchronizing the operation of the device and the operation of the electrical consumer in such a way that, during a change in the load impedance of the electrical consumer, a transition frequency and/or a transition duty cycle of the pulse-width-modulated activation signal is/are set in such a way that voltages and/or currents induced in the electrical consumer do not exceed and/or fall below specified threshold values.

Method for operating a Ki system

A method is provided for operating a device for wireless transfer of energy in the direction of an electrical consumer via inductive coupling. The method involves sequentially carrying out a power transfer, a data exchange, a measurement of setup parameters, and a measurement of a resonance frequency, wherein during the power transfer, an electrical actual power emitted by an inverter is regulated to a predetermined electrical setpoint value, wherein during the data exchange, data are exchanged between the device and the electrical consumer via a communication unit, wherein during the measurement of the setup parameters, objects possibly arranged over a power coil are detected, wherein during the measurement of the resonance frequency, a resonance frequency of a resonant circuit having the power coil is ascertained, and wherein the measurement of the resonance frequency is executed immediately before or immediately after the measurement of the setup parameters or the data exchange.

Method for operating a device for wireless transfer of energy in the direction of an electrical consumer by means of inductive coupling and device

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Bruchsal, Germany

Ulrich Waechter