Magnetic component and switch power supply device
A magnetic component and a switch power supply device are disclosed. The magnetic component includes a magnetic core and at least three windings, the magnetic core including at least three winding columns, at least one side columns, a first cover plate and a second cover plate opposite to each other, wherein the at least three winding columns are sequentially arranged in adjacent, the first cover plate and the second cover plate are respectively at upper parts or lower parts of the at least three winding columns and the at least one side column to form a closed magnetic flux loop; the at least three windings are wound on the at least three winding columns, respectively; wherein magnetic flux direction of the middle winding column in adjacent three winding columns is opposite to magnetic fluxes direction of the other two winding columns in adjacent three winding columns.
1. A magnetic component comprising:
a magnetic core, having a first winding column, a second winding column, a third winding column, a first side column, a second side column, and a first cover plate and a second cover plate which are disposed opposite to each other,
wherein the second winding column is disposed between the first winding column and the third winding column, the first side column and the second side column are disposed respectively outside the first winding column and the third winding column, the first cover plate and the second cover plate are disposed respectively above and below the first winding column, the second winding column, the third winding column, the first side column and the second side column, the first cover plate is connected to an upper end of each of the first winding column, the second winding column, the third winding column, the first side column, and the second side column, the second cover plate is connected to a lower end of each of the first winding column, the second winding column, the third winding column, the first side column, and the second side column, to form a closed magnetic flux loop;
wherein the magnetic component further comprising a first winding, a second winding and a third winding, wherein the first winding is wound on the first winding column, the second winding is wound on the second winding column, and the third winding is wound on the third winding column, and the first winding, the second winding and the third winding are electrically coupled in series;
a current flows through the first winding, the second winding and the third winding in sequence, wherein a magnetic flux of the first winding column and a magnetic flux of the third winding column have a first direction when the current flows through the first winding and the third winding, and a magnetic flux of the second winding column has a second direction when the current flows through the second winding, wherein the first direction is opposite to the second direction, wherein the current has the same magnitude and phase, the magnetic flux of the first winding column, the second winding column and the third winding column are equal in magnitude;
in a plane where the magnetic core is located, there is a straight line simultaneously contacts with or penetrates through the first winding column, the second winding column, and the third winding column.
2. The magnetic component of claim 1 , wherein the current flowing through the first winding and a current flowing through the third winding have a first current direction, and a current flowing through the second winding has a second current direction opposite to the first current direction.
3. The magnetic component of claim 1 , wherein the first winding column, the second winding column and the third winding column are sequentially arranged along a horizontal line;
wherein the first side column and the second side column are disposed on both ends of the horizontal line, respectively; or
wherein the first side column and the second side column are disposed on the same side of the horizontal line; or
wherein the first side column and the second side column are disposed on different sides of the horizontal line, respectively.
4. The magnetic component of claim 1 , wherein the magnetic core further comprises an inductor winding column on which an inductor winding is wound;
wherein the inductor winding is serially connected to at least one of the first winding, the second winding and the third winding.
5. The magnetic component of claim 1 ,
wherein the first winding, the second winding and the third winding have the same number of turns.
6. The magnetic component of claim 1 , wherein the first winding, the second winding and the third winding are primary windings, and at least one secondary winding is wound on each of the first winding column, the second winding column and the third winding column.
7. The magnetic component of claim 6 , wherein the number of turns of each of the secondary winding is one;
wherein the secondary winding is a PCB winding or a copper sheet winding.
8. The magnetic component of claim 6 , wherein the secondary winding wound on the first winding column, the secondary winding wound on the second winding column and the secondary winding wound on the third winding column are connected in parallel.
9. A magnetic component, comprising:
a magnetic core comprising at least three winding columns, at least one side column, a first cover plate and a second cover plate which are disposed opposite to each other, wherein at least three winding columns are sequentially arranged, the first cover plate and the second cover plate are disposed respectively above and below the at least three winding columns and the at least one side column, the first cover plate is connected to an upper end of each of the at least three winding columns and the at least one side column, the second cover plate is connected to a lower end of each of the at least three winding columns and the at least one side column, to form a closed magnetic flux loop; and
at least three windings wound on the at least three winding columns, respectively, and the at least three windings are electrically coupled in series;
a current flows through the at least three windings in sequence, wherein a magnetic flux of a middle winding column in adjacent three winding columns of the at least three winding columns has a first direction when the current flows through a middle winding in adjacent three windings of the at least three windings, and a magnetic flux of the other two winding columns in adjacent three winding columns of the at least three winding columns have a second direction when the current flows through the other two windings in adjacent three windings of the at least three windings, wherein the first direction is opposite to the second direction, wherein the current has the same magnitude and phase, the magnetic flux of the first winding column, the second winding column and the third winding column are equal in magnitude.
10. The magnetic component of claim 9 , wherein in a plane where the magnetic core is located, there is a straight line simultaneously contacts or penetrates through each of the at least three winding columns.
11. The magnetic component of claim 9 , wherein the at least three winding columns are sequentially arranged along a horizontal line.
12. The magnetic component of claim 11 , wherein the at least one side column comprises a first side column and a second side column which are disposed on both ends of the horizontal line, respectively.
13. The magnetic component of claim 11 , wherein the at least one side column comprises a first side column and a second side column which are disposed on the same side of the horizontal line, and the first side column is adjacent to the winding column located at one end of the at least three winding columns, the second side column is adjacent to the winding column located at the other end of the at least three winding columns; or
wherein the at least one side column comprises a first side column and a second side column which are disposed on different sides of the horizontal line, respectively, and the first side column is adjacent to the winding column located at one end of the at least three winding columns, the second side column is adjacent to the winding column located at the other end of the at least three winding columns.
14. The magnetic component of claim 11 , wherein the at least one side column is a single side column located on one side of the horizontal line.
15. The magnetic component of claim 9 , wherein the magnetic core further comprises an inductor winding column on which an inductor winding is wound.
16. The magnetic component of claim 9 , wherein the magnetic component is a transformer, the at least three windings are primary windings of the transformer, and at least one winding wound on each of the at least three winding columns is a secondary winding of the transformer.