Patent ID: 7457095

Claim:
A method for demagnetizing ferromagnetic components in a magnetic alternating field of an externally excited electrical series resonant circuit having an associated resonant frequency (f R ) , comprising at least one demagnetization coil having a no-load inductance (L 0 ), which is connected in series to at least one first capacitor having an associated capacitance (C) and in parallel to a voltage source having a supply voltage (U) with an adjustable excitation frequency (f) and fixed voltage amplitude being applicable, characterized in that a) the excitation frequency (f) is fixed in such a way that the product of the excitation frequency (f) in Hz multiplied by the no-load inductance (L 0 ) in Henry is f*L 0 ≧0.22 Hz*H, by which the excitation frequency (f) is limited in an operating range below the resonant frequency (f R ), before b) the voltage source is put into operation at a constant voltage amplitude and the fixed excitation frequency (f) and c) the components to be demagnetized are moved in a continuous operation through the demagnetization coil, the components having to lie in a defined fill level range in the interior of the demagnetization coil.