Multi-phase coupled inductor having compensation windings

Patent metadata

Field	Value
Publication number	US-11437186-B2
Application number	US-201716341103-A
Country	US
Kind code	B2
Filing date	Oct 19, 2017
Priority date	Oct 19, 2016
Publication date	Sep 6, 2022
Grant date	Sep 6, 2022

Abstract

A multi-phase coupled inductor can include: an upper E core including a first upper limb, a second upper limb, and a third upper limb; a lower E core including a first lower limb, a second lower limb, and a third lower limb; a first winding to wind the first upper limb and the first lower limb; a second winding to wind the second upper limb and the second lower limb; a third winding to wind the third upper limb and the third lower limb; a fourth winding to wind the first lower limb; and a fifth winding to wind the third lower limb. A first phase current can flow from the first winding to the fifth winding, and a third phase current can flow from the third winding to the fourth winding.

First claim

What is claimed is:

1. A three-phase coupled inductor comprising:
a first winding on a first limb;
a second winding on a second limb;
a third winding on a third limb;
a fourth winding on the first limb; and
a fifth winding on the third limb,
wherein a first number of turns of the first winding is the same as a third number of turns of the third winding,
wherein a fourth number of turns of the fourth winding is the same as a fifth number of turns of the fifth winding,
wherein a first phase current flows through the first winding and the fifth winding,
wherein a third phase current flows through the third winding and the fourth winding,
wherein the first number of turns and the fifth number of turns are expressed as the following Formula 1

N
a

=

1
+

2
⁢
k

+

3
⁢

k
2

+

6
⁢
k

k
-
1

⁢

N
a
′

⁢

⁢

⁢

k
=

R
1

R
0

Formula
⁢

⁢
1

wherein, the first number of turns is N a , the fifth number of turns is N a ', R 0 is a reluctance of each limb in a magnetic equivalent circuit of the three-phase coupled inductor, and R 1 is a summation of the reluctance R 0 and two reluctances R s between the first limb and the second limb in the magnetic equivalent circuit, and

wherein a second number of turns of the second winding is expressed as the following Formula 2

N
b

=

a
2

+

2
⁢
a

+
1
+

2
⁢
k
⁢
a

k
⁡

(

a
-
1

)

⁢

N
a
′

⁢

⁢

a
=

1
+

2
⁢
k

+

3
⁢

k
2

+

6
⁢
k

k
-
1

Formula
⁢

⁢
2

wherein, the second number of turns is N b .

2. The three-phase coupled inductor according to claim 1 , wherein the first limb and the third limb are outer legs and the second limb is a center leg.

3. The three-phase coupled inductor according to claim 2 , wherein a second phase current flows through the second winding.

4. The three-phase coupled inductor according to claim 3 , wherein the first phase current outputted from the first winding flows into the fifth winding and the third phase current outputted from the third winding flows into the fourth winding.

5. The three-phase coupled inductor according to claim 4 , wherein the three-phase coupled inductor includes a lower E core and an upper E core.

6. The th

Assignees

• Univ Florida

Inventors

• Wang Shuo
• Yang Le

Classifications

• H01F37/00 Primary

  Fixed inductances not covered by group H01F17/00 · CPC title

• H01F27/38

  Auxiliary core members; Auxiliary coils or windings · CPC title

• H01F30/12 Primary

  Two-phase, three-phase or polyphase transformers · CPC title

• H01F27/28

  Coils; Windings; Conductive connections · CPC title

• H01F27/24

  Magnetic cores · CPC title