Flat transformer

Abstract

A flat transformer comprises a first magnetic core, a second magnetic core and a circuit board. The first magnetic core is provided with a base, a first magnetic column, a second magnetic column and a third magnetic column. The first magnetic column, the second magnetic column and the third magnetic column are formed on the top surface of the base. The circuit board comprises a first side end, a second side end and a through hole. The second magnetic column is sleeved with the through hole, and the first side end and the second side end protrude out of the first magnetic core. The first magnetic core is in butt joint with the second magnetic core, and the circuit board is arranged between the first magnetic core and the second magnetic core. At least one spacing assembly is arranged between the first magnetic core and the second magnetic core; or the first magnetic core and / or the second magnetic core are / is provided with a plurality of spacing components.

Description

Technical Field

[0001] The invention relates to a planar transformer, and in particular to a planar transformer with a spacing component. Background Art

[0002] Many electrical appliances use transformers to convert input voltage into the required output voltage. A general transformer includes a high-voltage side coil and a low-voltage side coil, wherein the high-voltage side coil receives alternating current to generate a magnetic field, and the low-voltage side coil responds to the magnetic field to generate an induced potential difference. Therefore, the transformer obtains the corresponding output voltage and input voltage conversion through the turns ratio of the high-voltage side coil and the low-voltage side coil.

[0003] However, as the size of electrical appliances is becoming smaller, the size of the transformers used must also be reduced. Compared with traditional transformers, flat transformers (or planar transformers) are smaller in size. Therefore, flat transformers are more commonly used in applications where space is limited or miniaturization is required.

[0004] The application of planar transformers and planar boost inductors in power supplies belongs to the technology of energy storage conversion modules. The design of planar transformers can improve efficiency and increase the utilization of the space on the motherboard for placing components, thus greatly improving the power density of the power supply. Furthermore, because planar transformers have the characteristics of high temperature resistance and easy heat dissipation, they are suitable for high-efficiency, miniaturized power supplies and can be widely used.

[0005] However, both the planar transformer and the planar boost inductor have the characteristic that the air gap inductance affects the winding loss. As the edge flux and the bypass flux cut the winding, eddy currents are generated on the winding, and the generated eddy currents will cause uneven current density distribution inside the winding, resulting in an increase in AC resistance and winding loss.

[0006] Therefore, how to design a flat transformer to solve the problems and technical bottlenecks existing in the prior art has become an important topic studied by the inventors. Summary of the invention

[0007] The object of the present invention is to provide a flat transformer, comprising a first magnetic core and a second magnetic core, and a circuit board. The first magnetic core has a base, a first magnetic column, a second magnetic column and a third magnetic column, and the first magnetic column, the second magnetic column and the third magnetic column are formed on the top surface of the base. The circuit board comprises a first side end, a second side end and a through hole. The through hole is sleeved on the second magnetic column. The first side end and the second side end protrude outside the first magnetic core. The first magnetic core is connected to the second magnetic core, and the circuit board is arranged between the first magnetic core and the second magnetic core. There is at least one spacing component between the first magnetic core and the second magnetic core; or the first magnetic core and / or the second magnetic core have multiple spacing components.

[0008] In one embodiment, each spacing element is made of an electrically insulating material.

[0009] In one embodiment, the distance between the first magnetic column and the second magnetic column is equal to the distance between the second magnetic column and the third magnetic column.

[0010] In one embodiment, the circuit board further includes a first notch and a second notch. The first magnetic column and the third magnetic column are respectively embedded in the first notch and the second notch. The outer edge of the first magnetic column, the side edge of the first side end, and the side edge of the second side end substantially form a straight line. The outer edge of the third magnetic column, the other side edge of the first side end, and the other side edge of the second side end substantially form a straight line.

[0011] In one embodiment, the number of the at least one spacing element is one, and the spacing element is disposed between the second magnetic column and the second magnetic core.

[0012] In one embodiment, the at least one spacing element is plural in number and is disposed between the second magnetic column and the second magnetic core, and in the second magnetic column.

[0013] In one embodiment, the number of the at least one spacing element is plural, and the spacing elements are symmetrically disposed between the first magnetic column and the second magnetic core, and between the third magnetic column and the second magnetic core.

[0014] In one embodiment, the number of the at least one spacing element is plural, and the spacing elements are symmetrically disposed between the first magnetic column and the second magnetic core, between the third magnetic column and the second magnetic core, and within the first magnetic column and the third magnetic column.

[0015] In one embodiment, the number of the at least one spacing element is plural, and the spacing elements are symmetrically disposed between the first magnetic column and the second magnetic core, between the second magnetic column and the second magnetic core, and between the third magnetic column and the second magnetic core.

[0016] In one embodiment, the at least one spacing element is plural in number and is symmetrically disposed between the first magnetic column and the second magnetic core, between the second magnetic column and the second magnetic core, between the third magnetic column and the second magnetic core, and within the first magnetic column, the second magnetic column, and the third magnetic column.

[0017] In one embodiment, the number of the at least one spacing element is plural and the spacing elements are symmetrically disposed in the second magnetic core.

[0018] In one embodiment, the at least one spacing element is plural in number and is symmetrically disposed in the first magnetic core.

[0019] In one embodiment, the number of the at least one spacer element is plural and the spacers are symmetrically disposed in the first magnetic core and the second magnetic core.

[0020] In one embodiment, the first magnetic core and the second magnetic core are an E-shaped magnetic core and an I-shaped magnetic core respectively.

[0021] In one embodiment, the thickness of each spacer element is 0.07-0.08 mm.

[0022] The flat transformer proposed by the present invention has the following features and advantages: 1. It can greatly improve the power density of the power converter. 2. It can reduce the leakage inductance and the voltage stress of the power switch. 3. It has the characteristics of high temperature resistance and easy heat dissipation, and can be widely used under the requirements of high-efficiency and miniaturized power supplies. 4. By adjusting the number, size and configuration position of the spacing components, the air gap flux cutting the winding (reducing the edge flux) is reduced, thereby reducing the winding loss (mainly copper loss) and improving the efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a three-dimensional diagram of the first magnetic core of the planar transformer of the present invention.

[0024] Figure 2 It is a three-dimensional diagram of the circuit board of the planar transformer of the present invention.

[0025] Figure 3 It is a three-dimensional diagram of a circuit board of a planar transformer of the present invention being arranged on a first magnetic core.

[0026] Figure 4 It is a three-dimensional diagram of the first magnetic core and the second magnetic core of the planar transformer of the present invention being connected.

[0027] Figure 5 A side view of a first embodiment of a spacing assembly arrangement for a planar transformer according to the present invention.

[0028] Figure 6 A side view of a second embodiment of a spacing element arrangement for a planar transformer according to the present invention.

[0029] Figure 7 A side view of a third embodiment of a spacing element arrangement for a planar transformer according to the present invention.

[0030] Figure 8 A side view of a fourth embodiment of a spacing element arrangement for a planar transformer according to the present invention.

[0031] Fig. 9 A side view of a fifth embodiment of a spacing element arrangement for a planar transformer according to the present invention.

[0032] Fig.10 A side view of a sixth embodiment of a spacing element arrangement for a planar transformer according to the present invention.

[0033] Fig.11 A side view of a seventh embodiment of a spacing element arrangement for a planar transformer according to the present invention.

[0034] Fig.12A side view of an eighth embodiment of a spacing component arrangement for a planar transformer according to the present invention.

[0035] Fig.13 A side view of a ninth embodiment of a spacing element arrangement for a planar transformer according to the present invention.

[0036] Fig.14 A side view of a tenth embodiment of a spacing element arrangement for a planar transformer according to the present invention.

[0037] Fig.15 A side view of an eleventh embodiment of a spacing element arrangement for a planar transformer according to the present invention.

[0038] Fig.16 A side view of a twelfth embodiment of a spacing element arrangement for a planar transformer according to the present invention.

[0039] Wherein, the accompanying drawings are marked as follows:

[0040] 11: first magnetic core 12: second magnetic core

[0041] 20: Circuit board 30: Spacer component

[0042] 110: base 111: first magnetic column

[0043] 112: second magnetic column 113: third magnetic column

[0044] 201: first side end 202: second side end

[0045] 203: through hole 204: first notch

[0046] 205: second notch 1111: outer edge

[0047] 1131: Outer edge 2011,2012: Side edge

[0048] 2021,2022: Side Edge DETAILED DESCRIPTION

[0049] In order to further understand the techniques, means and effects adopted by the present invention to achieve the predetermined objectives, please refer to the following detailed description and drawings of the present invention. It is believed that the objectives, features and characteristics of the present invention can be deeply and specifically understood thereby. However, the drawings are only provided for reference and illustration and are not intended to limit the present invention.

[0050] The following is a description of the implementation of the present invention by specific embodiments, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents presented in this specification. The present invention can also be implemented or applied through other different specific examples, and the details in the present invention specification can also be modified and improved in various ways based on different viewpoints and applications without departing from the spirit of the present invention.

[0051] The structures, proportions, sizes, number of components, etc. illustrated in the drawings of this specification are only used to match the contents presented in the specification for the understanding and reading of those skilled in the art. They are not used to limit the conditions under which the present invention can be implemented, and therefore have no substantive technical significance. Any structural modification, change in proportion or adjustment in size shall fall within the scope of the technical contents presented by the present invention without affecting the effects and purposes that can be achieved by the present invention.

[0052] See also Figure 1 , Figure 2 , Figure 3 as well as Figure 4 As shown, they are respectively a three-dimensional view of the first magnetic core of the flat transformer of the present invention, a three-dimensional view of the circuit board of the flat transformer of the present invention, a three-dimensional view of the circuit board of the flat transformer of the present invention arranged on the first magnetic core, and a three-dimensional view of the first magnetic core and the second magnetic core of the flat transformer of the present invention docking. The flat transformer includes a first magnetic core 11, a second magnetic core 12 and a circuit board 20.

[0053] The first magnetic core 11 has a base 110, a first magnetic column 111, a second magnetic column 112, and a third magnetic column 113, and the first magnetic column 111, the second magnetic column 112, and the third magnetic column 113 are formed on the top surface of the base 110. In one embodiment, the distance between the first magnetic column 111 and the second magnetic column 112 is equal to the distance between the second magnetic column 112 and the third magnetic column 113, and the first magnetic core 11 is a symmetrical structure with the second magnetic column 112 as the center.

[0054] The circuit board 20 includes a first side end 201, a second side end 202 and a through hole 203. The through hole 203 is sleeved on the second magnetic column 112, and the first side end 201 and the second side end 202 protrude outside the first magnetic core 11. The first magnetic core 11 is connected to the second magnetic core 12, and the circuit board 20 is arranged between the first magnetic core 11 and the second magnetic core 12.

[0055] The circuit board 20 further includes a first notch 204 and a second notch 205. The first magnetic column 111 and the third magnetic column 113 are respectively embedded in the first notch 204 and the second notch 205. The outer edge 1111 of the first magnetic column 111, the side edge 2011 of the first side end 201, and the side edge 2021 of the second side end 202 substantially form a straight line. The outer edge 1131 of the third magnetic column 113, the other side edge 2012 of the first side end 201, and the other side edge 2022 of the second side end 202 substantially form a straight line.

[0056] There is at least one spacer component 30 between the first magnetic core 11 and the second magnetic core 12, or the first magnetic core 11 and / or the second magnetic core 12 has multiple spacer components 30. Each spacer component 30 is made of an electrically insulating material, such as but not limited to a material that can hinder the flow of electric charges, a rubber-like polymer material, a plastic material, a polytetrafluoroethylene material, etc.

[0057] The flat transformer design proposed by the present invention reduces the air gap flux cutting the winding (reduces the edge flux) by adjusting the number, size and configuration position of the spacing components 30, thereby reducing the winding loss (mainly copper loss) and improving the efficiency. The following will describe different embodiments of the spacing component configuration.

[0058] See also Figure 5 and Figure 6 , which are side views of the first embodiment and the second embodiment of the spacing component configuration of the planar transformer of the present invention. For the convenience of description, the circuit board 20 is omitted in the drawings. Figure 5 As shown, the number of at least one spacing component 30 is one, and it is disposed between the second magnetic column 112 and the second magnetic core 12. The spacing component 30 is formed on the second magnetic column 112, and is connected to the first magnetic core 11 through the second magnetic core 12, so that the spacing component 30 is disposed between the second magnetic column 112 and the second magnetic core 12. In a preferred embodiment, the thickness of the spacing component 30 is 0.07-0.08 mm.

[0059] like Figure 6 As shown, the number of at least one spacing component 30 is multiple, such as Figure 6 Four are shown, but the present invention is not limited thereto, and are disposed between the second magnetic column 112 and the second magnetic core 12, and in the second magnetic column 112. The spacing component 30 is formed on and in the second magnetic column 112, and is connected to the first magnetic core 11 through the second magnetic core 12, so that the spacing component 30 is disposed between the second magnetic column 112 and the second magnetic core 12, and in the second magnetic column 112. In a preferred embodiment, the thickness of each spacing component 30 is 0.07 to 0.08 mm.

[0060] See also Figure 7 and Figure 8 As shown, they are side views of the third embodiment and the fourth embodiment of the spacing component configuration of the planar transformer of the present invention. Figure 7 As shown, the number of at least one spacing component 30 is multiple, such as Figure 7 Two spacer components 30 are shown, and one spacer component 30 is symmetrically disposed between the first magnetic column 111 and the second magnetic core 12, and the other spacer component 30 is disposed between the third magnetic column 113 and the second magnetic core 12. The two spacer components 30 are formed on the first magnetic column 111 and the third magnetic column 113, respectively, and are connected to the first magnetic core 11 through the second magnetic core 12, so that the spacer component 30 is disposed between the first magnetic column 111 and the second magnetic core 12, and between the third magnetic column 113 and the second magnetic core 12.

[0061] like Figure 8 As shown, the number of at least one spacing component 30 is multiple, such as Figure 8 There are eight of them shown, and they are symmetrically arranged between the first magnetic column 111 and the second magnetic core 12, between the third magnetic column 113 and the second magnetic core 12, and in the first magnetic column 111 and the third magnetic column 113. The eight spacing components 30 are formed on the first magnetic column 111 and in the first magnetic column 111, and on the third magnetic column 113 and in the third magnetic column 113, respectively, and are connected to the first magnetic core 11 through the second magnetic core 12, so that the spacing components 30 are arranged between the first magnetic column 111 and the second magnetic core 12, and in the first magnetic column 111, and between the third magnetic column 113 and the second magnetic core 12, and in the third magnetic column 113.

[0062] See also Fig. 9 and Fig.10 As shown in FIG. 1 , they are side views of the fifth and sixth embodiments of the spacing component configuration of the planar transformer of the present invention. Fig. 9 As shown, the number of at least one spacing component 30 is multiple, such as Fig. 9 There are three shown, and they are respectively arranged between the first magnetic column 111 and the second magnetic core 12, between the second magnetic column 112 and the second magnetic core 12, and between the third magnetic column 113 and the second magnetic core 12. The spacing component 30 is formed on the first magnetic column 111, the second magnetic column 112, and the third magnetic column 113, and is connected to the first magnetic core 11 through the second magnetic core 12. Therefore, the spacing component 30 is arranged between the first magnetic column 111 and the second magnetic core 12, between the second magnetic column 112 and the second magnetic core 12, and between the third magnetic column 113 and the second magnetic core 12.

[0063] like Fig.10 As shown, the number of at least one spacing component 30 is multiple, such as Fig.10There are 12 spacing components 30 shown, and they are symmetrically arranged between the first magnetic column 111 and the second magnetic core 12, between the second magnetic column 112 and the second magnetic core 12, between the third magnetic column 113 and the second magnetic core 12, and in the first magnetic column 111, the second magnetic column 112, and the third magnetic column 113. The 12 spacing components 30 are respectively formed on the first magnetic column 111 and in the first magnetic column 111, on the second magnetic column 112 and in the second magnetic column 112, and on the third magnetic column 113 and in the third magnetic column 113, and are connected to the first magnetic core 11 through the second magnetic core 12, so that the spacing components 30 are arranged between the first magnetic column 111 and the second magnetic core 12, and in the first magnetic column 111, between the second magnetic column 112 and the second magnetic core 12, and in the second magnetic column 112, and between the third magnetic column 113 and the second magnetic core 12, and in the third magnetic column 113.

[0064] See also Fig.11 and Fig.12 As shown, they are side views of the seventh and eighth embodiments of the spacing component configuration of the planar transformer of the present invention. Fig.11 As shown, the number of at least one spacing component 30 is multiple, such as Fig.11 Two are shown, and one spacing component 30 is symmetrically arranged on one side of the second magnetic core 12, and the other spacing component 30 is arranged on the other side of the second magnetic core 12. The two spacing components 30 are respectively formed in the second magnetic core 12, and are connected to the first magnetic core 11 through the second magnetic core 12, so that the position of one spacing component 30 arranged on the second magnetic core 12 corresponds to the base 110 between the first magnetic column 111 and the second magnetic column 112, and the position of the other spacing component 30 arranged on the first magnetic core 11 corresponds to the base 110 between the second magnetic column 112 and the third magnetic column 113.

[0065] like Fig.12 As shown, the number of at least one spacing component 30 is multiple, such as Fig.12 Eight spacer components 30 are shown, and four spacer components 30 are symmetrically arranged on one side of the second magnetic core 12, and the other four spacer components 30 are arranged on the other side of the second magnetic core 12. The eight spacer components 30 are respectively formed in the second magnetic core 12, and are connected to the first magnetic core 11 through the second magnetic core 12. Therefore, the positions of the four spacer components 30 arranged in the second magnetic core 12 correspond to the base 110 between the first magnetic column 111 and the second magnetic column 112, and the positions of the other four spacer components 30 arranged in the second magnetic core 12 correspond to the base 110 between the second magnetic column 112 and the third magnetic column 113.

[0066] See also Fig.13 and Fig.14As shown, they are side views of the ninth and tenth embodiments of the spacing component configuration of the planar transformer of the present invention. Fig.13 As shown, the number of at least one spacing component 30 is multiple, such as Fig.13 Two are shown, and one spacing component 30 is symmetrically arranged on one side of the first magnetic core 11, and the other spacing component 30 is arranged on the other side of the first magnetic core 11. The two spacing components 30 are respectively formed in the first magnetic core 11, and are connected to the first magnetic core 11 through the second magnetic core 12, so that the position of one spacing component 30 arranged on the first magnetic core 11 corresponds to the base 110 between the first magnetic column 111 and the second magnetic column 112, and the position of the other spacing component 30 arranged on the first magnetic core 11 corresponds to the base 110 between the second magnetic column 112 and the third magnetic column 113.

[0067] like Fig.14 As shown, the number of at least one spacing component 30 is multiple, such as Fig.14 Eight spacer components 30 are shown, and four spacer components 30 are symmetrically arranged on one side of the first magnetic core 11, and the other four spacer components 30 are arranged on the other side of the second magnetic core 12. The eight spacer components 30 are respectively formed in the first magnetic core 11, and are connected to the first magnetic core 11 through the second magnetic core 12. Therefore, the positions of the four spacer components 30 arranged in the first magnetic core 11 correspond to the base 110 between the first magnetic column 111 and the second magnetic column 112, and the positions of the other four spacer components 30 arranged in the first magnetic core 11 correspond to the base 110 between the second magnetic column 112 and the third magnetic column 113.

[0068] See also Fig.15 and Fig.16 , which are side views of the eleventh and twelfth embodiments of the spacing component configuration of the planar transformer of the present invention. Fig.15 As shown, the number of at least one spacing component 30 is multiple, such as Fig.15Four are shown, two of which are symmetrically provided with a spacing component 30 on one side of the first magnetic core 11 and the other side of the first magnetic core 11, and the other two are symmetrically provided with a spacing component 30 on one side of the second magnetic core 12 and the other side of the second magnetic core 12. The two spacing components 30 are respectively formed in the first magnetic core 11 and connected to the first magnetic core 11 through the second magnetic core 12, so that the position of one spacing component 30 provided in the first magnetic core 11 corresponds to the base 110 between the first magnetic column 111 and the second magnetic column 112, and the position of the other spacing component 30 provided in the first magnetic core 11 corresponds to the base 110 between the second magnetic column 112 and the third magnetic column 113. Two spacer components 30 are formed in the second magnetic core 12, and are connected to the first magnetic core 11 through the second magnetic core 12. Therefore, the position of one spacer component 30 disposed in the second magnetic core 12 corresponds to the base 110 between the first magnetic column 111 and the second magnetic column 112, and the position of the other spacer component 30 disposed in the second magnetic core 12 corresponds to the base 110 between the second magnetic column 112 and the third magnetic column 113. Preferably, the two spacer components 30 disposed in the first magnetic core 11 correspond to the two spacer components 30 disposed in the second magnetic core 12, respectively.

[0069] like Fig.16 As shown, the number of at least one spacing component 30 is multiple, such as Fig.16 Sixteen are shown, eight of which are symmetrically provided with a spacing component 30 on one side of the first magnetic core 11 and the other side of the first magnetic core 11, and the other eight are symmetrically provided with a spacing component 30 on one side of the second magnetic core 12 and the other side of the second magnetic core 12. The eight spacing components 30 are respectively formed in the first magnetic core 11 and connected to the first magnetic core 11 through the second magnetic core 12, so that the positions of four spacing components 30 provided in the first magnetic core 11 correspond to the base 110 between the first magnetic column 111 and the second magnetic column 112, and the positions of the other four spacing components 30 provided in the first magnetic core 11 correspond to the base 110 between the second magnetic column 112 and the third magnetic column 113. Eight spacer components 30 are formed in the second magnetic core 12, and are connected to the first magnetic core 11 through the second magnetic core 12. Therefore, the positions of the four spacer components 30 disposed in the second magnetic core 12 correspond to the base 110 between the first magnetic column 111 and the second magnetic column 112, and the positions of the other four spacer components 30 disposed in the first magnetic core 11 correspond to the base 110 between the second magnetic column 112 and the third magnetic column 113. Preferably, the eight spacer components 30 disposed in the first magnetic core 11 correspond to the eight spacer components 30 disposed in the second magnetic core 12, respectively.

[0070] In summary, the present invention has the following features and advantages:

[0071] 1. The use of planar transformers can greatly increase the power density of power converters.

[0072] 2. The structure of the planar transformer can reduce leakage inductance and reduce the voltage stress of the power switch.

[0073] 3. Flat transformers are resistant to high temperatures and easy to dissipate heat, so they are suitable for use in high-efficiency, miniaturized power supplies.

[0074] 4. The flat-plate transformer of the present invention reduces the air gap flux cutting the winding (reduces the edge flux) by adjusting the number, size and configuration position of the spacing components, thereby reducing the winding loss (mainly copper loss) and improving the efficiency.

[0075] The above description is only a detailed description and drawings of the preferred specific embodiments of the present invention, but the features of the present invention are not limited thereto and are not intended to limit the present invention. The entire scope of the present invention shall be subject to the following patent application scope. All embodiments that conform to the spirit of the patent application scope of the present invention and similar variations thereof shall be included in the scope of the present invention. Any changes or modifications that can be easily thought of by anyone familiar with the art within the field of the present invention shall be covered by the following patent scope of this case.

Claims

1. A flat transformer, characterized in that: include: A first magnetic core and a second magnetic core, wherein the first magnetic core has a base, a first magnetic column, a second magnetic column and a third magnetic column, and the first magnetic column, the second magnetic column and the third magnetic column are formed on the top surface of the base; as well as A circuit board comprises a first side end, a second side end and a through hole; The through hole is sleeved on the second magnetic column, and the first side end and the second side end protrude outside the first magnetic core; The first magnetic core is connected to the second magnetic core, and the circuit board is arranged between the first magnetic core and the second magnetic core; There is at least one spacing component between the first magnetic core and the second magnetic core; or the first magnetic core and / or the second magnetic core has a plurality of spacing components.

2. The flat transformer according to claim 1, characterized in that: Each of the spacing components is made of an electrically insulating material.

3. The flat transformer according to claim 1, characterized in that: The distance between the first magnetic column and the second magnetic column is equal to the distance between the second magnetic column and the third magnetic column.

4. The planar transformer according to claim 1, characterized in that: The board also includes: a first notch and a second notch; The first magnetic column and the third magnetic column are respectively embedded in the first recess and the second recess; The outer edge of the first magnetic column, the side edge of the first side end and the side edge of the second side end substantially form a straight line; The outer edge of the third magnetic column, the other side edge of the first side end and the other side edge of the second side end substantially form a straight line.

5. The flat transformer according to claim 1, characterized in that: The at least one spacing component is one in number and is disposed between the second magnetic column and the second magnetic core.

6. The planar transformer according to claim 1, characterized in that: The at least one spacing component is multiple in number and is disposed between the second magnetic column and the second magnetic core, and in the second magnetic column.

7. The planar transformer according to claim 1, characterized in that: The at least one spacing component is multiple in number and is symmetrically disposed between the first magnetic column and the second magnetic core, and between the third magnetic column and the second magnetic core.

8. The planar transformer according to claim 1, characterized in that: The at least one spacing component is plural in number and is symmetrically disposed between the first magnetic column and the second magnetic core, between the third magnetic column and the second magnetic core, and within the first magnetic column and the third magnetic column.

9. The planar transformer according to claim 1, characterized in that: The at least one spacing component is multiple in number and is symmetrically disposed between the first magnetic column and the second magnetic core, between the second magnetic column and the second magnetic core, and between the third magnetic column and the second magnetic core.

10. The planar transformer according to claim 1, characterized in that: The at least one spacing component is plural in number and is symmetrically disposed between the first magnetic column and the second magnetic core, between the second magnetic column and the second magnetic core, between the third magnetic column and the second magnetic core, and inside the first magnetic column, the second magnetic column, and the third magnetic column.

11. The planar transformer according to claim 1, characterized in that: The at least one spacing component is in multiple numbers and is symmetrically arranged in the second magnetic core.

12. The planar transformer according to claim 1, characterized in that: The at least one spacing component is in multiple numbers and is symmetrically arranged in the first magnetic core.

13. The planar transformer according to claim 1, characterized in that: The at least one spacing component is in multiple quantity and is symmetrically arranged in the first magnetic core and the second magnetic core.

14. The planar transformer according to claim 1, characterized in that: The first magnetic core and the second magnetic core are respectively an E-shaped magnetic core and an I-shaped magnetic core.

15. The planar transformer according to claim 1, characterized in that: The thickness of each of the spacer components is 0.07-0.08 mm.

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