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Transmitter and method for providing inductive wireless energy transmission

  • US 10,394,198 B2
  • Filed: 03/05/2013
  • Issued: 08/27/2019
  • Est. Priority Date: 04/05/2012
  • Status: Active Grant
First Claim
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1. A transmitter for providing inductive wireless energy transmission, comprising:

  • a transmission device for generating an alternating magnetic field;

    a determination device for determining an object signal which indicates an object in the area of the transmission device, wherein the object signal is a function of the power absorbed by the object located in the magnetic field; and

    a control device for controlling the alternating magnetic field based on the object signal, wherein the control device changes the strength of the alternating magnetic field to provide at least three different levels of magnetic field strength based on an amplitude of the object signal determined by the determination device;

    wherein the control device controls the alternating magnetic field so that it does not exceed a predetermined magnetic field strength,wherein the transmission device transmits energy inductively from a power supply to a consumer device,wherein an accident risk is associated with the object, which is magnetizable or electrically conductive,wherein the amplitude of the object signal corresponds to a power absorbed by the object or which corresponds to a size of the object,wherein the strength of the alternating magnetic field is adjusted to the signal and accordingly to the size or a magnetic susceptibility of the object, so as to keep an absolute heating of the object at a predetermined level, so as to prevent a premature termination of an energy transmission,wherein an energy transfer process last longer due to a reduced strength of the magnetic field,wherein a transmitting of a predetermined amount of energy is achievable even if the object is present, andwherein the object is an inanimate object.

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