Inductor structure for medium voltage insulation

Patent metadata

Field	Value
Publication number	US-2025174389-A1
Application number	US-202318519893-A
Country	US
Kind code	A1
Filing date	Nov 27, 2023
Priority date	Nov 27, 2023
Publication date	May 29, 2025
Grant date	—

Abstract

The present disclosure provides an inductor including plural cores, each of the plural cores including a center post, the plural cores separated from each other by corresponding first gaps, each of the first gaps dimensioned to enable a flux path with a value that is one-half a value of the flux through one of the center posts.

First claim

At least the following is claimed:

1 . An inductor, comprising:
plural cores comprising a first core and a second core, the first core comprising a first center post and the second core comprising a second center post, the first core separated from the second core by a first gap that is dimensioned to enable a flux path with a value that is one-half a value of the flux through the first or second center posts.

2 . The inductor of claim 1 , wherein the first core is configured to be at a different electrical potential than the second core.

3 . The inductor of claim 1 , wherein dimensions of the first gap are determined based on specifications for inductance and insulation.

4 . The inductor of claim 1 , wherein the plural cores further comprise a third core adjacent to the second core, the third core comprising a third center post, the second core separated from the third core by a second gap, the second gap dimensioned to enable a flux path with a value equal to the flux value of the first gap.

5 . The inductor of claim 1 , wherein the first core comprises a first core pair, the second core comprises a second core pair, the first core pair are separated by a first center post gap, and the second core pair are separated by a second center post gap.

6 . The inductor of claim 1 , wherein the first core comprises a first core pair, the second core comprises a second core pair, the first core pair are abutted against each other, and the second core pair are abutted against each other.

7 . The inductor of claim 6 , wherein the plural cores comprise side posts, each of the side posts comprising a side post gap, the side post gaps oriented orthogonally to a direction of the first gap.

8 . The inductor of claim 6 , wherein the plural cores comprise side posts, each of the side posts comprising a side post gap, the side post gaps oriented parallel to a direction of the first gap.

9 . The inductor of claim 1 , wherein the first core and the second core each comprises a single body structure.

10 . The inductor of claim 1 , wherein the plural cores are arranged in a linear arrangement.

11 . The inductor of claim 1 , wherein the plural cores are arranged in a non-linear arrangement.

12 . The inductor of claim 1 , wherein the first gap is occupied by an insulation sheet.

13 . The inductor of claim 12 , wherein the insulation sheet further comprises a semiconductive coating.

14 . The inductor of claim 13 , wherein the insulation sheet with the semiconductive coating extends beyond the first gap.

15 . The inductor of claim 1 , wherein the first gap comprises an encapsulation material.

16 . The inductor of claim 1 , further comprising plural winding assemblies insulated from the plural cores, the plural winding assemblies comprising a first winding assembly and a second winding assembly, the first winding assembly comprising a first winding layer encircling the first center post, the second winding assembly comprising a second winding layer encircling the second center post.

17 . The inductor of claim 16 , wherein the first and second winding layers comprise litz wire.

18 . The inductor of claim 16 , wherein each of the first winding assembly and the second winding assembly comprises a bobbin support.

19 . An inductor, comprising:
plural cores, each comprising a core pair separated by a first gap oriented along a first direction, each of the plural cores comprising a center post, the plural cores separated from each other by corresponding second gaps oriented along a second direction that is orthogonal to the first direction, each of the second gaps dimensioned to enable a flux path with a value that is one-half a value of the flux through one of the center posts.

20 . An inductor, comprising:
plural cores, each of the plural cores comprising a center post, the plural cores separated from each other by corresponding first gaps, each of the first gaps dimensioned to enable a flux path with a value that is one-half a value of the flux through one of the center posts.

Assignees

• Delta Electronics Inc

Inventors

• Anup Anurag
• Wang Ruxi
• Barbosa Peter Mantovanelli

Classifications

• H01F3/14 Primary

  Constrictions; Gaps, e.g. air-gaps (in magnetic shunt paths H01F3/12) · CPC title

• H01F17/04 Primary

  with magnetic core · CPC title

• H01F3/10

  Composite arrangements of magnetic circuits · CPC title

• H01F27/324

  Insulation between coil and core, between different winding sections, around the coil; Other insulation structures · CPC title

• H01F2027/329

  Insulation with semiconducting layer, e.g. to reduce corona effect · CPC title