The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 25, 2008
Filed:
Feb. 20, 2008
Albert Maurer, Grut, CH;
Marek Rohner, Zurich, CH;
Albert Maurer, Grut, CH;
Marek Rohner, Zurich, CH;
Other;
Abstract
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 (), 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 (L) in Henry is f*L≧0,22 Hz*H, the excitation frequency is in an operating range () and the series resonant circuit () may be used without further regulation technology to demagnetize components which are led through the inner chamber of the demagnetization coil () and form a fill level. If the excitation frequency (f) is selected accordingly, continuous operation is possible, in which the resonant frequency (f) of the series resonant circuit () is not reached even at a high fill level.