Patent ID: 11940272
Assignee: ABB SCHWEIZ AG
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 2:
3. A PEC system comprising:
a transmitter configured to generate a changing electromagnetic field which induces eddy currents in an object of an electrically conductive material arranged within the electromagnetic field, the transmitter having a switching device and a transmitter coil configured to be connected to a voltage source, the switching device being arranged for switching a current generated by the voltage source through the transmitter coil, wherein the transmitter coil includes a plurality of parallel electrically conductive coil layers, connected in parallel to each other, with a respective damping resistor connected across each of the coil layers, each of the coil layers being connected in series with a respective diode; and
a receiver configured to detect a changing electromagnetic field generated by the eddy currents, the receiver having an electrically conductive receiver coil, a Receiver Channel, RC, and an Over-Voltage Protection circuit, OVP, connected between the receiver coil and the RC.