Insulation device and electrical device having the same

Patent metadata

Field	Value
Publication number	US-12505952-B2
Application number	US-202217655368-A
Country	US
Kind code	B2
Filing date	Mar 18, 2022
Priority date	Mar 22, 2021
Publication date	Dec 23, 2025
Grant date	Dec 23, 2025

Abstract

An insulation device includes an insulating part, and at least one conductive part located on at least one surface of the insulating part, wherein the at least one surface of the insulating part facing the at least one conductive part has central concave shape. A longitudinal section of the at least one conductive part includes a straight portion in the middle and two curved portions extending outwardly from both ends of the straight portion. The curved portions satisfy:

{

x
=

A
⁡
(

ϕ
+

1
2

⁢

(

e

(

ϕ
+

i
⁢
φ

)

+

e

(

ϕ
-

i
⁢
φ

)

)

)

y
=

A
⁡
(

φ
+

1

2
⁢
i

⁢

(

e

(

ϕ
+

i
⁢
φ

)

-

e

(

ϕ
-

i
⁢
φ

)

)

)

.

First claim

What is claimed is:

1 . An insulation device, comprising an insulating part, and at least one conductive part located on at least one surface of the insulating part, wherein,
the at least one surface of the insulating part facing the at least one conductive part has a central concave shape; and a longitudinal section of the at least one conductive part comprises a straight portion in a middle portion of the longitudinal section and two curved portions extending outwardly from both ends of the straight portion, wherein the curved portions satisfy the following equation:

{

x
=

A
⁡
(

ϕ
+

1
2

⁢

(

e

(

ϕ
+

i
⁢
φ

)

+

e

(

ϕ
-

i
⁢
φ

)

)

)

y
=

A
⁡
(

φ
+

1

2
⁢
i

⁢

(

e

(

ϕ
+

i
⁢
φ

)

-

e

(

ϕ
-

i
⁢
φ

)

)

)

,

where
,

A
=

d
π

,

d is an insulation thickness of the straight portion of the insulating part along the longitudinal section, i is an imaginary unit, a value range of Ø is (−∞, +∞), and a value range of φ is (0.5π, 0.56π].

2 . The insulation device according to claim 1 , wherein the at least one conductive part comprises a first conductive part and a second conductive part opposite to each other, the insulating part is disposed between the first conductive part and the second conductive part, and a first surface of the insulating part facing the first conductive part and a second surface of the insulating part facing the second conductive part have central concave shape.

3 . The insulation device according to claim 1 , wherein each of the curved portions is formed of at least two arc lines connected in turn, and a vertex of each of the arc lines falls into a range of curve defined by the equation.

4 . The insulation device according to claim 1 , wherein an outer end of each of the curved portions further forms an endpoint arc, an angle of the endpoint arc is no less than 180°, and a vertex of the endpoint arc is located on an outer side of curve defined by the equation.

5 . The insulation device according to claim 1 , wherein the curved portions corresponding to the at least one conductive part allow an electric field distortion rate at a region where both ends of the at least one conductive part are located to be less than a predetermined value.

6 . The insulation device according to claim 1 , wherein the insulating part is made of a solid insulating material, and the at least one conductive part is made of a conductive or semi-conductive material.

7 . The insulation device according to claim 1 , wherein the insulation device further comprises an outer profile having a section that is a circle or a square; and the outer profile surrounds the at least one conductive part and the insulating part, or the outer profile completely covers the at least one conductive part and the insulating part.

Assignees

• Delta Electronics Shanghai Co

Inventors

• Ma Peng
• Xie Yicong
• Zhang Weiqiang

Classifications

• H01F30/06 Primary

  characterised by the structure · CPC title

• H01F2027/329

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

• H01F27/324 Primary

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

• H01B17/60

  Composite insulating bodies · CPC title

• H01B17/62

  Insulating-layers or insulating-films on metal bodies · CPC title