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Current dependent inductivity

A current, inductive technology, applied in the field of passive inductors, which can solve the problems of large failure risk, extra construction, magnetic field edge at the air gap, etc.

Pending Publication Date: 2021-06-01
DELTA ELECTRONICS (THAILAND) PUBLIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, this solution also has some disadvantages: there is a magnetic field edge at the air gap
Although offering greater flexibility in tuning the inductance, such active components require additional circuitry and are more complex to build, and therefore have a greater risk of failure and higher cost

Method used

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  • Current dependent inductivity
  • Current dependent inductivity
  • Current dependent inductivity

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0140] FIG. 1 shows a cross-sectional view of a first exemplary embodiment of a current-dependent passive inductance 1 a with an unsaturated saturation region 5 . In addition, magnetic flux paths 6 and magnetic field lines 12 are indicated.

[0141] Inductor 1 a includes magnetic core 2 , winding 3 a and side air gap 4 . In cross-sectional view, the magnetic core 2 appears rectangular with two winding windows 10 which also have a rectangular shape. The inductance 1a can be formed by two E-core parts or by two pot-shaped core parts or by other core-shaped parts which appear rectangular in cross-sectional view.

[0142] The cross-sectional view of the inductance 1 a is symmetrical with respect to the longitudinal axis of the winding 3 . The winding 3 is wound on the center post 81 . The cross-sectional view of the inductance 1a is not symmetrical about an axis perpendicular to the longitudinal axis: although there is only core material on one side of the winding window 10, be...

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Abstract

A passive, current dependent inductivity (1) comprises a magnetic core (2), windings (3) and at least one bank air gap (4). A saturation region (5) made of magnetic material is arranged between the bank air gap (4) and the windings (3). A magnetic flux path (6) bifurcates into a first path (61) passing through the saturation region (5) and into a second path (62) passing through the bank air gap (4) and bypassing the saturation region (5). The magnetic resistance of the first path (61) is lower than the magnetic resistance of the second path (62) for winding currents below a first saturation current (7a) and whereby the magnetic resistance of the second path (62) is lower than the magnetic resistance of the first path (61) for winding currents above the first saturation current (7a) due to saturation of the saturation region.

Description

technical field [0001] The invention relates to current-dependent passive inductances and to methods for constructing such current-dependent passive inductances. Finally, the invention relates to a power converter comprising a current-dependent passive inductance. Background technique [0002] A well-known solution for constructing current-dependent passive inductors is to use a magnetic core with a central leg surrounded by windings. The central pillar of this prior art solution includes a stepped air gap. The stepped air gap is formed, for example, by completely removing the central strut in a first, shorter region and by reducing the cross-section of the central strut in a second region adjacent to the first region. Therefore, when low current flows through the winding, only a small magnetic flux is generated and only the first area acts as an air gap and determines the value of the inductance. As the current through the winding increases, the flux increases until a po...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F27/24H01F27/28H01F37/00
CPCH01F27/24H01F27/28H01F27/2823H01F37/00H01F3/14H01F38/023H01F27/385H01F27/427H02M1/15
Inventor C·克伦霍尔兹
Owner DELTA ELECTRONICS (THAILAND) PUBLIC CO LTD