Patent ID: 9615407
Date: 2017-04-04
CPC Classifications: G01K,H05B

Claim:
1. A device for inductively heating a heating element via a magnetic field, the device comprising: an induction coil generating the magnetic field, the induction coil having a specific inductance and resistance; and a resonant circuit connectable to the induction coil, the resonant circuit having at least one first capacitor and at least one first current source, wherein a material of the heating element has a substantially constant permeability at least in temperature subranges, wherein the resonant circuit has at least one first measuring device for determining a resonance frequency of the resonant circuit and has a second measuring device for determining a power consumption of the resonant circuit, wherein the inductance of the induction coil is determined via the resonance frequency and the resistance of the induction coil is determined via the power consumption, and wherein the device has at least one third measuring device for determining a temperature-dependent resistance of the heatinq element based on the inductance and the resistance of the induction coil, and wherein the temperature of the heating element is determined from the temperature-dependent resistance.