Core, transformer, power converting apparatus, and photovoltaic module including the same

1. A core comprising:

a base;

a first outer wall and a second outer wall formed on the base;

a first protruding member protruding on the base and disposed within the first outer wall and the second outer wall; and

a second protruding member protruding on the base, disposed within the first outer wall and the second outer wall, and separated from the first protruding member,

wherein a length of an edge of the second protruding member opposing the first protruding member is less than an outer circumference of the first protruding member,

wherein a first opening and a second opening opposite to each other are formed in a first axial direction between the first outer wall and the second outer wall for input or output of an external conductive line,

wherein the first opening, the first protruding member, the second protruding member, and the second opening are sequentially formed based on the first axial direction,

wherein the first protruding member has a circular shape,

wherein the second protruding member has a curved shape, and

wherein a gap between the first protruding member and the second protruding member is substantially constant.

2. The core of claim 1 ,

wherein the first protruding member has a circular shape, and

wherein the length of the edge of the second protruding member opposing the first protruding member is less than a half of the outer circumference of the first protruding member.

3. The core of claim 1 , wherein a protruding height of the second protruding member is less than a protruding height of the first protruding member.

4. The core of claim 1 , wherein a gap between the first protruding member and the second protruding member increases from a central area toward a side area of the second protruding member.

5. The core of claim 1 , wherein the base, the first outer wall and the second outer wall, the first protruding member, and the second protruding member are formed of a same material.

6. A transformer comprising:

a core, wherein the core comprises a base, a first outer wall and a second outer wall formed on the base, a first protruding member protruding on the base and disposed within the first outer wall and the second outer wall, and a second protruding member protruding on the base, disposed within the first outer wall and the second outer wall, and separated from the first protruding member;

a first bobbin surrounding the first protruding member in the core; and

a second bobbin surrounding the first protruding member and the second protruding member in the core,

wherein a length of an edge of the second protruding member opposing the first protruding member is less than an outer circumference of the first protruding member,

wherein a first opening and a second opening opposite to each other are formed in a first axial direction between the first outer wall and the second outer wall for input or output of an external conductive line,

wherein the first opening, the first protruding member, the second protruding member, and the second opening are sequentially formed based on the first axial direction,

wherein the first protruding member has a circular shape,

wherein the second protruding member has a curved shape, and

wherein a gap between the first protruding member and the second protruding member is substantially constant.

7. The transformer of claim 6 , further comprising:

a first wire wound around the first bobbin; and

a second wire wound around the second bobbin.

8. The transformer of claim 7 ,

wherein the first opening and the second opening opposing each other are formed in the first outer wall and the second outer wall of the core, and

wherein the transformer further comprises:

a first connection part and a second connection part disposed in a direction of the first opening and electrically connected to the first wire; and

a third connection part and a fourth connection part disposed in a direction of the second opening and electrically connected to the second wire.

9. The transformer of claim 7 , wherein the first wire and the second wire have an identical winding direction.

10. The transformer of claim 7 ,

wherein the first opening and the second opening opposing each other are formed in the first outer wall and the second outer wall of the core,

wherein the first wire extends in a direction of the first opening, and

wherein the second wire extends in a direction of the second opening.

11. The transformer of claim 6 , further comprising a connection member connecting the first bobbin and the second bobbin.

12. The transformer of claim 6 , wherein a height of the first bobbin or the second bobbin is greater than a height of the first protruding member.

13. The transformer of claim 6 , wherein a height of the first bobbin and a height of the second bobbin are equal.

14. The transformer of claim 6 , wherein the first bobbin and the second bobbin are attachable to and detachable from the core.

15. The transformer of claim 6 , further comprising a second core disposed on the first bobbin, the second bobbin and the core, wherein the first bobbin and the second bobbin are disposed between the core and the second core,

wherein the second core comprises:

a second base;

a third outer wall and a fourth outer wall formed on the second base;

a third protruding member protruding on the second base and disposed within the third outer wall and the fourth outer wall; and

a fourth protruding member protruding on the second base, disposed within the third outer wall and the fourth outer wall, and separated from the third protruding member, and

wherein a length of an edge of the fourth protruding member opposing the third protruding member is less than an outer circumference of the third protruding member.

16. The transformer of claim 15 , wherein a protruding height of the third protruding member and a protruding height of the fourth protruding member are equal.

17. A power converting apparatus comprising the transformer of claim 6 .

18. A photovoltaic module comprising the power converting apparatus of claim 17 .