US 11,600,423 B2Granted

Transformer

AssigneeDelta Electronics, Inc.

InventorsPeng Ma, Yicong Xie, Lin Lan, Weiqiang Zhang

Life of this patent

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Abstract

The present disclosure provides a transformer including at least one magnetic core each having at least one window; one primary side winding passing through the at least one window, a wire forming the primary side winding being sequentially covered with a first solid insulating layer, a grounded shielding layer and a second solid insulating layer from inside to outside along a radial direction of the wire, the grounded shielding layer being connected to a reference ground; and at least one secondary side winding, each passing through the at least one window, the primary side winding having a first voltage with respect to the reference ground, the secondary side winding having a second voltage with respect to the reference ground, and the second voltage being greater than 50 times of the first voltage.

Claims10

Dependent claims

A transformer, comprising:

at least one magnetic core, each having at least one window;
one primary side winding passing through the at least one window of each of all the magnetic core;
and
at least one secondary side winding, each passing through the at least one window of one corresponding magnetic core,
wherein a wire forms the primary side winding, and the wire is sequentially covered with a first solid insulating layer, a grounded shielding layer and a second solid insulating layer from inside to outside along a radial direction of the wire,
wherein the grounded shielding layer is connected to a reference ground,
wherein the primary side winding has a first voltage with respect to the reference ground, the secondary side winding has a second voltage with respect to the reference ground, and the second voltage is greater than 50 times of the first voltage;
wherein a space between the grounded shielding layer and the second solid insulating layer is further covered with a semi-conductive layer;
wherein the magnetic core is a circular-shaped magnetic ring;
and
wherein given that an external radius of the grounded shielding layer is r, an internal radius of the magnetic ring is R, a dielectric constant of the second solid insulating layer is ε, and the second voltage is U, then a thickness d of the second solid insulating layer satisfies formulas as below:
1.2
*
U
r
⁢
⁢
ɛ
⁡
(
1
ɛ
⁢
ln
⁡
(
r
+
d
r
)
+
ln
⁡
(
R
e
+
d
)
)
≤
20
⁢
⁢
kV
⁢
/
⁢
mm
,
and
1.2
*
U
(
r
+
d
)
⁢
(
1
ɛ
⁢
ln
⁡
(
r
+
d
r
)
+
ln
⁡
(
R
e
+
d
)
)
≤
2
⁢
⁢
kV
⁢
/
⁢
mm
.

90 more elements

Dependencies are inferred from the claim text.

Facts

Application: 16/403,697Filed 6 May 2019
Priority: CN 201810682516.727 Jun 2018
Published: US 2020/0005984 A12 Jan 2020
Granted: 7 Mar 2023
Term ends: Not estimatedThe source records don’t support an estimate.

Classification12 codes

H01F 27/24
Details of transformers or inductances, in general: magnetic cores
H01F 27/2885
Shielding: with shields or electrodes
H01F 27/2823
Coils; Windings; Conductive connections: wires
H01F 27/32
Coils; Windings; Conductive connections: insulating of coils, windings, or parts thereof