A method is presented for demagnetizing ferromagnetic components in an
alternating field of an externally excited electrical series resonant
circuit. A supply voltage having an excitation frequency (f) is applied
in parallel to a demagnetization coil having a no-load inductance of the
series resonant circuit, because of which an alternating current (I)
flows through the series resonant circuit (1), which generates a magnetic
alternating field. In the event of suitable selection of the excitation
frequency (f) in such a way that the product of the excitation frequency
(f) in Hz multiplied by the no-load inductance (L0) in Henry is
f*L0.gtoreq.0,22 Hz*H, the excitation frequency is in an operating range
(5) and the series resonant circuit (1) may be used without further
regulation technology to demagnetize components which are led through the
inner chamber of the demagnetization coil (2) and form a fill level. If
the excitation frequency (f) is selected accordingly, continuous
operation is possible, in which the resonant frequency (f.sub.R) of the
series resonant circuit (2) is not reached even at a high fill level.