Inductive Charging of Vehicles with Secondary-Side Voltage Measurement and Feedback from the Secondary Side to the Primary Side

A secondary circuit device comprising:

• a secondary coil for transmitting and/or receiving magnetic energy of a magnetic field and for converting the magnetic energy into electrical energy;
• an energy transmission unit for transmitting the electrical energy;
• a secondary-side detection unit;
• and
• a clamper circuit unit;
• wherein:
• the magnetic field is generated by a primary coil of a primary circuit device;
• the energy transmission unit includes an inlet for connecting the secondary coil;
• the energy transmission unit includes an outlet for providing the electrical energy as voltage and/or current;
• the secondary-side detection unit is connected to the inlet and/or the outlet of the energy transmission unit, in order to detect an overvoltage at the inlet and/or the outlet of the energy transmission unit;
• and
• when the overvoltage is detected at the inlet and/or the outlet of the energy transmission unit, the secondary-side detection unit is configured to influence the magnetic field in the secondary coil via the clamper circuit unit such that a current jump and/or a voltage jump is brought about in the primary coil.