Magnetically biased inductor or flyback transformer

• US 20020039061A1
• Filed: 09/13/2001
• Published: 04/04/2002
• Est. Priority Date: 10/03/2000
• Status: Abandoned Application

• Current Assignee: Alexander Timashov
• Original Assignee: Alexander Timashov
• Inventors: Timashov, Alexander
• Application Number:
  US09/950,661
• Publication Number:
  US 20020039061A1
• Time in Patent Office: Days
• US Class Current: 336/175
• CPC Class Codes: H01F 29/146 Constructional details
• CPC Class Codes: H01F 38/023 of inductances
• CPC Class Codes: H01F 38/42 Flyback transformers

Abstract

The invention relates to inductors or flyback transformers provided with a device that opposes the saturating flux in a core.

The device comprises at least one E-shaped ferromagnetic core, the two outer limbs only of the E being provided each with an air gap relative to an adjoining core component; and two permanent magnets, installed one adjacent to each said air gap, oriented so to direct the flux between the magnet poles in a direction opposed to the flux direction generated in said core by DC current when said core is in use; and a coil for generating an electric field, positioned around the central limb of said E-shaped ferrite core, whereby when said coil is powered the major portion of generated flux transverses the air gaps and only a minor portion thereof flows through the magnets.

Claims

1. An inductor device or a flyback transformer having a device which opposes the saturating magnetic flux in their core, comprising;

a) At least one E shaped soft ferromagnetic core, the two outer limbs only of the E being provided each with an air gap relative to an adjoining core component;

b) Two permanent magnets, installed one adjacent to each said air gap, oriented so to direct the flux between their magnet poles in a direction opposed to the flux direction generated in said cores by DC current when said inductor/flyback transformer is in use; and

c) A coil for generating a magnetic field, positioned around the central limb of said E-shaped ferromagnetic core, whereby when said coil is powered the major portion of generated flux transverses said air gaps and only a minor portion thereof flows through said magnets.

2. The inductor/flyback transformer device as claimed in claim 1, wherein said permanent magnets are magnetized along their width.

3. The inductor/flyback transformer device as claimed in claim 1, wherein the permeability of said E-shaped ferromagnetic core and the permeability of said magnets are arranged to cause the major portion of generated magnetic flux to transverse said air gaps and only a minor portion thereof to flow through said magnets.

4. The inductor/flyback transformer device as claimed in claim 1, wherein said permanent magnets are made of a hard ferrite material.

5. The inductor/flyback transformer device as claimed in claim 1, wherein said adjacent core component comprises a second E shaped ferromagnetic core, arranged so that the open sides of said E shapes face each other.

6. The inductor/flyback transformer device as claimed in claim 1, wherein said coil comprises a plurality of planar circuits separated by insulators.

7. The inductor/flyback transformer device as claimed in claim 5, being part of a fly-back transformer.