MAGNETIC COMPONENT AND TRANSFORMER

Abstract

The present disclosure concerns a magnetic component (1), especially for a wireless charging transformer, including a magnetic core (2), at least one flat pre-wound major electrical coil (3) disposed on the magnetic core (2) and at least one minor electrical coil (4) wound around the magnetic core (2). The present disclosure also concerns a transformer (100) including the magnetic component (1) as a primary magnetic component (101).

Claims

1. A magnetic component for a wireless charging transformer, comprising: a magnetic core; at least one flat pre-wound major electrical coil disposed on the magnetic core, and at least one minor electrical coil wound around the magnetic core.

2. The magnetic component according to claim 1, wherein the major electrical coil has a shape substantially corresponding to the shape of the magnetic core.

3. The magnetic component according to claim 2, wherein the magnetic core comprises a plurality of leg portions, and a plurality of the minor electrical coils are respectively wound around the leg portions.

4. The magnetic component according to claim 3, wherein the magnetic core further comprises a center portion, and wherein the major electrical coil is disposed so as to surround the center portion of the magnetic core and the plurality of leg portions project from the center portion.

5. The magnetic component according to claim 4, wherein the center portion, the major electrical coil and the minor electrical coil do not overlap in plain view.

6. The magnetic component according to claim 4, wherein the magnetic core has a cross-potent-shape with a plurality of T-shaped leg portions projecting from the center portion, wherein each T-shaped leg portion comprises a first portion connected to a side of the center portion and a second portion as a crossbar, especially at the end of the first portion, and wherein the minor electrical coils are especially respectively wound around the first portion of the T-shaped leg portions.

7. The magnetic component according to claim 6, wherein a combined top surface area of all second portions of the T-shaped leg portions is X and a top surface area of the center portion is Y, wherein a ratio of X/Y is between and including 0.8 and 1.2.

8. The magnetic component according to claim 6, wherein the minor electrical coils are wound around the T-shaped leg portions between the center portion of the magnetic core and a portion of the major electrical coil and/or between the portion of the major electrical coil and the second portion of the T-shaped leg portions.

9. The magnetic component according to claim 6, wherein the magnetic core has a star-shape comprising five or more, especially T-shaped, leg portions projecting from the center portion.

10. The magnetic component according to claim 3, wherein the magnetic core has a ring-shape, especially a rectangular ring-shape or a circular ring-shape.

11. The magnetic component according to claim 10, further comprising a plurality of minor electrical coils respectively disposed within the circumference of each major electrical coil, and/or a plurality of minor electrical coils respectively disposed between major electrical coils.

12. The magnetic component according to claim 11, wherein the magnetic core is rectangular ring-shaped, the magnetic component comprising four major electrical coils each disposed so as to surround a corner of the magnetic core.

13. The magnetic component according to claim 2, comprising at least two of the major electrical coils and a plurality of the minor electrical coils, wherein the minor electrical coils are respectively wound around the magnetic core within a circumference of the major electrical coils and/or between the major electrical coils.

14. The magnetic component according to claim 13, wherein the minor electrical coils are wound so as to respectively have a minor winding axis, around which the minor electrical coil is wound, perpendicular to a major winding axis, around which the major electrical coils are respectively wound, of the major electrical coils.

15. The magnetic component according to claim 1, wherein the magnetic component serves as a primary magnetic component for transmission of electrical power.

16. A transformer for wireless charging, comprising at least one magnetic component, the magnetic component comprises: a magnetic core; at least one flat pre-wound major electrical coil disposed on the magnetic core, and at least one minor electrical coil wound around the magnetic core.

17. The transformer according to claim 16, wherein the magnetic component serves as a primary magnetic component for transmission of electrical power.

18. The transformer according to claim 16, wherein the major electrical coil has a shape substantially corresponding to the shape of the magnetic core.

19. The transformer according to claim 18, wherein the magnetic core comprises a plurality of leg portions, and a plurality of the minor electrical coils are respectively wound around the leg portions.

20. The transformer according to claim 18, wherein the center portion, the major electrical coil and the minor electrical coil do not overlap in plain view.

Description

BRIEF DESCRIPTION OF DRAWINGS

[0096] Further details, advantages, and features of the preferred embodiments of the present disclosure are described in detail with reference to the figures. Therein:

[0097] FIG. 1 shows a schematic plan view of a magnetic component according to a first embodiment of the present disclosure;

[0098] FIG. 2 shows a schematic plan view of a magnetic component according to a second embodiment of the present disclosure;

[0099] FIG. 3 shows a schematic plan view of a magnetic component according to a third embodiment of the present disclosure;

[0100] FIG. 4 shows a schematic plan view of a magnetic component according to a fourth embodiment of the present disclosure;

[0101] FIG. 5 shows a schematic plan view of a magnetic component according to a fifth embodiment of the present disclosure;

[0102] FIG. 6 shows a schematic plan view of a magnetic component according to a sixth embodiment of the present disclosure;

[0103] FIG. 7 shows a schematic plan view of a magnetic component according to a seventh embodiment of the present disclosure;

[0104] FIG. 8 shows a schematic plan view of a magnetic component according to an eighth embodiment of the present disclosure;

[0105] FIG. 9 shows a schematic plan view of a magnetic component according to a ninth embodiment of the present disclosure;

[0106] FIG. 10 shows a schematic plan view of a magnetic component according to a tenth embodiment of the present disclosure;

[0107] FIG. 11 shows a schematic plan view of a magnetic component according to an eleventh embodiment of the present disclosure;

[0108] FIG. 12 shows a schematic plan view of a magnetic component according to a twelfth embodiment of the present disclosure;

[0109] FIG. 13 shows a schematic plan view of a magnetic component according to a thirteenth embodiment of the present disclosure;

[0110] FIG. 14 shows a schematic plan view of a magnetic component according to a fourteenth embodiment of the present disclosure;

[0111] FIG. 15 shows a schematic plan view of a magnetic component according to a fifteenth embodiment of the present disclosure;

[0112] FIG. 16 shows a schematic plan view of a magnetic component according to a sixteenth embodiment of the present disclosure;

[0113] FIG. 17 shows a schematic plan view of a magnetic component according to a seventeenth embodiment of the present disclosure;

[0114] FIG. 18 shows a schematic cross-sectional drawing of the magnetic component according to the seventeenth embodiment of the present disclosure;

[0115] FIG. 19 shows a schematic plan view of a magnetic component according to an eighteenth embodiment of the present disclosure;

[0116] FIG. 20 shows a schematic cross-sectional drawing of the magnetic component according to the eighteenth embodiment of the present disclosure;

[0117] FIG. 21 shows a schematic plan view of a magnetic component according to a nineteenth embodiment of the present disclosure;

[0118] FIG. 22 shows a schematic plan view of a magnetic component according to a twentieth embodiment of the present disclosure;

[0119] FIG. 23 shows a schematic plan view of a magnetic component according to a twenty-first embodiment of the present disclosure;

[0120] FIG. 24 shows a schematic plan view of a magnetic component according to a twenty-second embodiment of the present disclosure; and

[0121] FIG. 25 shows a schematic diagram of a transformer of the present disclosure.

DESCRIPTION OF EMBODIMENTS

[0122] It is an object of the present disclosure to provide a magnetic component, especially for a wireless charging transformer, which overcomes the aforementioned disadvantages. In particular, an object of the present disclosure is to provide a magnetic component with an improved coupling factor, reduced losses, low weight, low cost, and low heat generation. Further, it is an object of the present disclosure to provide a transformer, especially for wireless charging, with an improved coupling factor, reduced losses, low weight, low cost, and low heat generation.

[0123] The solution of these objects is solved by the features of the independent claims. The dependent claims contain advantageous embodiments of the present disclosure.

[0124] FIG. 1 shows a schematic plan view of a magnetic component 1 according to a first embodiment of the present disclosure.

[0125] The magnetic component 1 of the present embodiment includes a magnetic core 2 with a cross-potent shape. Therein, the magnetic core 2 includes a square center portion 5 and four leg portions 6.

[0126] The leg portions 6 each include a first portion 7 projecting from the center portion 5. In particular, each first portion 7 is connected to and projects from a side 8 of the center portion 5. Further, the leg portions 6 each include a second portion 9. The second portion 9 is a crossbar at the end of the first portion 7 opposite to the center portion 5.

[0127] A top area 10 of all second portions 9 combined is equal to a top area 11 of the center portion 5. Thereby, an advantageous flow of magnetic field lines between the second portions 9 and the center portion 5 can be provided.

[0128] Further, the magnetic component 1 of the present embodiment includes one flat pre-wound major electrical coil 3 disposed on the magnetic core 2. The major electrical coil 3 is pre-wound, meaning it is not directly wound around an element of the magnetic component 1, but is rather separately wound and placed on the magnetic core 2. The magnetic component 1 further includes holding elements (not shown), which hold the major electrical coil 3 in place, especially above the magnetic core 2. Such holding elements are preferably formed of an electrically insulating material.

[0129] As can be taken from FIG. 1, the major electrical coil 3 is disposed so as to surround the center portion 5 of the magnetic core 2. Further, the major electrical coil 3 overlaps with parts of the first portions 7 of the leg portions 6. The major electrical coil 3 does not overlap with the second portions 9 of the leg portions 6. Herein, a major winding axis 13 of the major electrical coil 3, around which the major electrical coil 3 is wound (pre-wound), projects from a center 18 of the center portion 5 of the magnetic core 2. In other words, the major winding axis 13 corresponds to a center axis of the center portion 5.

[0130] The magnetic component 1 further includes eight minor electrical coils 4. The minor electrical coils 4 are defined as coils which are wound around portions of the magnetic core 2. The minor electrical coils 4 each surround the first portion 7 of the leg portions 6. Herein, two minor electrical coils 4 are provided for each leg portion 6. A minor winding axis 14 of each minor electrical coil 4 is parallel to an extension or projection direction of the respective first portion 7 of the leg portion 6.

[0131] Herein, for each leg portion 6, one minor electrical coil 4 is provided outside of a circumference 12 of the major electrical coil 3. Further, one minor electrical coil 4 is provided inside of the circumference 12 of the major electrical coil 3. In other words, one minor electrical coil 4 is disposed between the center portion 5 and a portion of the major electrical coil 3 and one minor electrical coil 4 is disposed between a portion of the major electrical coil 3 and the second portion 9 of the respective leg portion 6.

[0132] The cross-potent shape of the magnetic core 2 has the advantage that ferrite material, of which the magnetic core 2 is formed, can be saved, especially at the corners between two adjacent leg portions 6. In addition, the major electrical coil 3 has the advantage that a large area of winding can be covered thereby, thus increasing a coupling factor of the magnetic component 1.

[0133] The second portions 9 do not necessarily need to be disposed at the ends of the first portions 7 opposite to the center portion 5. Instead, these can be disposed anywhere along the first portions 7, for instance in the middle thereof

[0134] FIG. 2 shows a schematic plan view of a magnetic component 1 according to a second embodiment of the present disclosure.

[0135] Herein, the magnetic component 1 with the cross-potent shaped magnetic core 2 includes four minor electrical coils 4. The minor electrical coils 4 are, per leg portion 6, disposed within the circumference 12 of the major electrical coil 3. In other words, the minor electrical coils 4 are disposed between the center portion 5 of the magnetic core 2 and a portion of the major electrical coil 3.

[0136] Preferably, no further minor electrical coils 4 are provided. In particular, no further minor electrical coils 4 are provided outside of the circumference 12 of the major electrical coil 3.

[0137] FIG. 3 shows a schematic plan view of a magnetic component 1 according to a third embodiment of the present disclosure.

[0138] Herein, the magnetic component 1 with the cross-potent shaped magnetic core 2 includes four minor electrical coils 4. The minor electrical coils 4 are, per leg portion 6, disposed outside of the circumference 12 of the major electrical coil 3. In other words, the minor electrical coils 4 are disposed between a portion of the major electrical coil 3 and the second portion 9 of the respective leg portion 6.

[0139] Preferably, no further minor electrical coils 4 are provided. In particular, no further minor electrical coils 4 are provided inside of the circumference 12 of the major electrical coil 3.

[0140] The magnetic components of embodiments one to three are preferably primary magnetic components for transmission of electrical energy to a secondary magnetic component, which receives the electrical energy by receiving a magnetic field generated by the primary magnetic component (please see FIG. 25 and its description).

[0141] FIG. 4 shows a schematic plan view of a magnetic component 1 according to a fourth embodiment of the present disclosure.

[0142] Herein, the magnetic component 1 with the cross-potent shaped magnetic core 2 includes eight minor electrical coils 4, two for each leg portion 6, and no major electrical coil 3. On the other hand, the magnetic component 1 may also include more or less than two minor electrical coils 4 per leg portion 6. For instance, the magnetic component 1 may include one or three or more minor electrical coils 4 per leg portion 6.

[0143] Further, the minor electrical coils 4 shown in FIG. 4 are, per leg portion 6, provided in sets of two and wound around the first portion 7 of the respective leg portion 6. The minor electrical coils 4 are thus disposed between the center portion 5 of the magnetic core 2 and the second portion 9 of the respective leg portion 6.

[0144] As can be taken from FIG. 4, magnetic field lines 21, which are drawn into structures of the magnetic core 2, demonstrate a flow of a magnetic field through the magnetic component 1, especially in the case that the magnetic component 1 of the present embodiment is employed as a secondary magnetic component for reception of electrical energy. Further, arrows 22 drawn into the minor electrical coils 4 demonstrate an electric current 22 flowing through these. The electric current 22 is generated by the magnetic field 21 flowing through the magnetic component 1.

[0145] FIG. 5 shows a schematic plan view of a magnetic component 1 according to a fifth embodiment of the present disclosure.

[0146] Herein, the cross-potent shaped magnetic core 2 includes four leg portions 6. In this embodiment, each leg portion 6 includes two first portions 7, each projecting from one side surface 8 of the center portion 5 of the magnetic core 2. In other words, two first portions 7 project from the center portion 5 for each side 8 of the center portion 5 of the magnetic core 2. The leg portions 6 further each include one second portion 9. On the other hand, the magnetic core 2 may include three or more first portions 7 projecting from each side 8 of the center portion 5 of the magnetic core 2.

[0147] As shown in FIG. 5, one minor electrical coil 4 is wound around one first portion 7. In other words, the magnetic component 1 includes eight minor electrical coils 4, each wound around one first portion 7 of the respective leg portion 6. The magnetic component 1 may include more than one minor electrical coil 4 wound around each first portion 7 of the respective leg portion 6. For instance, the magnetic component 1 may include two or three or more minor electrical coils 4 respectively per leg portion 6.

[0148] The magnetic component 1 according to this embodiment includes no major electrical coils 3.

[0149] The magnetic components 1 of the embodiments four and five are preferably secondary magnetic components for the reception of electrical energy from a primary magnetic component.

[0150] FIG. 6 shows a schematic plan view of a magnetic component 1 according to a sixth embodiment of the present disclosure.

[0151] The magnetic core 2 of this embodiment is star-shaped, including a circular center portion 5 and eight leg portions 6. The leg portions 6 respectively project from a circumference 23 of the center portion 5. The magnetic component 1 may also include more or less than eight leg portions 6. For example, the magnetic component 1 may include four, five, six, seven or nine leg portions 6.

[0152] The leg portions 6 in this embodiment are straight-bar-shaped and do not include crossbar-shaped second portions 9. However, crossbar-shaped second portions 9 are preferably also included herein, disposed preferably at the ends of the shown leg portions 6 opposite to the center portion 5.

[0153] Further, the end portions of the leg portions 6 abutting the center portion 5 are shown as straight, whereas the center portion 5 is circular. These end portions are preferably also formed as circular, so as to align and abut closely to the circular center portion 5.

[0154] The leg portions 6 may be attached to the center portion 5 or be formed integrally with the center portion 5.

[0155] Additionally, the magnetic component 1 includes one major electrical coil 3, where the major winding axis 13 of the major electrical coil 3 coincides with a center 18 of the circular center portion 5. Further, the magnetic component 1 includes, per leg portion 6, one minor electrical coil 4 wound around the leg portion 6 and disposed outside of the circumference 12 of the major electrical coil 3. The magnetic component 1 may also include, per leg portion 6, two or three or more minor electrical coils 4, especially all disposed outside of the circumference 12 of the major electrical coil 3, or at least in part, disposed on the inside of the circumference 12 of the major electrical coil 3.

[0156] The magnetic component 1 of the sixth embodiment is preferably a primary magnetic component for the transmission of electrical energy to a secondary magnetic component.

[0157] FIG. 7 shows a schematic plan view of a magnetic component 1 according to a seventh embodiment of the present disclosure.

[0158] Herein, the magnetic component 1 includes the star-shaped magnetic core 2. Further, the magnetic component 1 includes eight minor electrical coils 4, one wound around each leg portion 6. On the other hand, the magnetic component 1 may also include two or more minor electrical coils 4 wound around each leg portion 6.

[0159] As described above, the ends of the leg portions 6 abutting the center portion 5 are preferably round.

[0160] The magnetic component 1 of the seventh embodiment is preferably a secondary magnetic component for the reception of electrical energy from a primary magnetic component, especially for the reception of electrical energy from the magnetic component 1 of the sixth embodiment.

[0161] FIG. 8 shows a schematic plan view of a magnetic component 1 according to an eighth embodiment of the present disclosure.

[0162] Herein, the magnetic core 2 is rectangular, including two long sides 24 and two short sides 25, where the long sides 24 are longer than the short sides 25 of the magnetic core 2. This shape is also defined as “bar-shaped”.

[0163] Further, the magnetic component 1 includes two major electrical coils 3 and eight minor electrical coils 4. The major electrical coils 3 are disposed so as to be parallel to the top surface 11 of the magnetic core 2.

[0164] Herein, per major electrical coil 3, two minor electrical coils 4 are disposed within the circumference of the major electrical coil 3. Further, in total four minor electrical coils 4 are disposed outside the circumferences of the major electrical coils 3. In particular, two minor electrical coils 4 are disposed between the major electrical coils 3. Further, one minor electrical coil 4 is disposed at each end of the long sides 24 of the magnetic core 2.

[0165] As demonstrated by the arrows 22, the major and minor electrical coils 3, 4 are electrically connected to one another such that a current of two adjacent electrical coils 3, 4 flows in the same direction. Further, as demonstrated by the arrows 21, the magnetic field is projected from a right side of the magnetic core 2 corresponding to a right major electrical coil 3 to a left side of the magnetic core 2 corresponding to a left major electrical coil 3.

[0166] FIG. 9 shows a schematic plan view of a magnetic component 1 according to a ninth embodiment of the present disclosure.

[0167] Herein, the magnetic component 1 includes the bar-shaped magnetic core 2 as well as two major electrical coils 3 and six minor electrical coils 4. The magnetic component 1 of this embodiment does not include the minor electrical coils 4 at the ends of the long sides 24 of the magnetic core 2.

[0168] In other words, the magnetic component 1 includes, per major electrical coil 3, two minor electrical coils 4 each on the inside of the circumference 12 of the major electrical coil 3. Further, the magnetic component 1 includes two minor electrical coils 4 between the major electrical coils 3. Preferably, the magnetic component 1 includes no further minor electrical coils 4.

[0169] FIG. 10 shows a schematic plan view of a magnetic component 1 according to a tenth embodiment of the present disclosure.

[0170] Herein, the magnetic component 1 includes the bar-shaped magnetic core 2 as well as two major electrical coils 3 and four minor electrical coils 4. One minor electrical coil 4 is disposed inside the circumference 12 of each major electrical coil 3. Two minor electrical coils 4 are disposed between the two major electrical coils 3.

[0171] Preferably, no further minor electrical coils 4 are provided.

[0172] The structures shown in embodiments eight to ten can be repeated. In other words, the magnetic core 2 may be formed with longer long sides 24 and such a magnetic component may include three or more major electrical coils 3, with the respective minor electrical coils 4 disposed within their circumferences 12 and between the respective major electrical coils 3.

[0173] The magnetic components 1 of the embodiments eight to ten are preferably primary magnetic components for the transmission of electrical energy to a secondary magnetic component.

[0174] FIG. 11 shows a schematic plan view of a magnetic component 1 according to an eleventh embodiment of the present disclosure.

[0175] The magnetic component 1 of the present embodiment includes a ladder-shaped magnetic core 2. Therein, the magnetic core 2 includes two main portions 15 corresponding to side rails of the ladder shape. Further, the magnetic core 2 includes three connecting portions 16 corresponding to rungs of the ladder shape. The magnetic core 2 may include one or two, or more than three of the connecting portions 16.

[0176] The magnetic component 1 further includes three minor electrical coils 4, each wound around one connecting portion 16. On the other hand, the magnetic component 1 may also include more than one (for example two or three or more) minor electrical coil 4 wound around each connecting portion 16.

[0177] As demonstrated by the field lines 21, the magnetic field 21 projects from one main portion 15 and enters the other main portion 16. Further, the magnetic field 21 flows from one main portion 15 to the other main portion 16 along the connecting portions 16. Thereby, a current 22 is induced in the minor electrical coils 4.

[0178] FIG. 12 shows a schematic plan view of a magnetic component 1 according to a twelfth embodiment of the present disclosure.

[0179] Herein, the magnetic component 1 includes two minor electrical coils 4 per connecting portion 16 between the main portions 15. In total, the magnetic component 1 includes six minor electrical coils 4.

[0180] In embodiments eleven and twelve, the number of main portions 15 and number of connecting portions 16 can vary. For instance, the magnetic core 2 may include two main portions 15 and one connecting portion 16, or two connecting portions 16, or four or more connecting portions 16, preferably each with one or more minor electrical coils 4 wound around them. Further, the magnetic core 2 may include three main portions 15, with connecting portions 16 between a first main portion 15 and a second main portion 15 as well as connecting portions 16 between the second main portion 15 (as a middle main portion 15) and a third main portion (not shown). Therein, the number of connecting portions 16 respectively connecting two main portions 15 may also vary between different main portions 15. In other words, two connecting portions 16 may connect the first and second main portions 15, whereas only one (or more) connecting portions (not shown) connect the second main portion 15 and the third main portion.

[0181] The magnetic components 1 of the embodiments eleven and twelve are preferably secondary magnetic components.

[0182] FIG. 13 shows a schematic plan view of a magnetic component 1 according to a thirteenth embodiment of the present disclosure.

[0183] The magnetic component 1 of the present embodiment includes a square ring-shaped magnetic core 2. Further, the magnetic component 1 includes four major electrical coils 3 and sixteen minor electrical coils 4. In other words, the magnetic component 1 includes four minor electrical coils 4 for each major electrical coil 3. However, the magnetic component 1 may include one or two or three or five or more minor electrical coils 4 for each major electrical coil 3.

[0184] The magnetic core 2 includes four corner portions 17. The corner portions 17 are defined by dotted lines 20 shown in FIG. 13.

[0185] Each major electrical coil 3 is disposed such that its major winding axis 13 coincides with a center of one corner portion 17.

[0186] Further as shown in FIG. 13, two minor electrical coils 4 are disposed in each circumference 12 of one major electrical coil 3. Two minor electrical coils 4 are disposed between two respectively adjacent major electrical coils 3. The minor winding axis 14 of the minor electrical coils 4 is parallel to a side 8 of the magnetic core 2, around which they are wound.

[0187] As demonstrated by the field lines 21, the magnetic field 21 projects from one corner portion 17 and enters its two adjacent corner portions 17.

[0188] FIG. 14 shows a schematic plan view of a magnetic component 1 according to a fourteenth embodiment of the present disclosure.

[0189] Herein, the magnetic component 1 with the square ring-shaped magnetic core 2 includes minor electrical coils 4 only between the major electrical coils 3. Herein, due to the lack of minor electrical coils 4 within the circumference of the major electrical coils 3, a ring-thickness 31, i.e. a distance from an inner circumference 26 to the outer circumference 12, in other words a thickness in a direction perpendicular to the major winding axis 13 of the major electrical coil 3, is greater as compared to embodiment thirteen. The magnetic component 1, as shown in FIG. 14, includes two minor electrical coils 4 for each major electrical coil 3. However, the magnetic component 1 may also include one or three or more minor electrical coils 4 for each major electrical coil 3, where these are especially (as shown in FIG. 14 with respect to two minor electrical coils 4 for each major electrical coil 3) arranged between the major electrical coils 3.

[0190] FIG. 15 shows a schematic plan view of a magnetic component 1 according to a fifteenth embodiment of the present disclosure.

[0191] As can be taken from FIG. 15, the magnetic component 1 includes the square ring-shaped magnetic core 2 as well as four major electrical coils 3 and four minor electrical coils 4.

[0192] The minor electrical coils 4 are disposed between two adjacent major electrical coils 3. The major electrical coils 3, between which no minor electrical coils 4 are provided (left-top and left-bottom as well as right-top and right-bottom, respectively) abut one another. With this configuration, as compared to embodiments thirteen and fourteen, the ring-thickness 31 of the major electrical coils 3 between their inner circumference 26 and their outer circumference 12 is further increased. On the other hand, between major electrical coils 3 which do not abut one another, the magnetic component 1 may include one or three or more minor electrical coils 4.

[0193] FIG. 16 shows a schematic plan view of a magnetic component 1 according to a sixteenth embodiment of the present disclosure.

[0194] Herein, the magnetic component 1 includes the square ring-shaped magnetic core 2 along with four minor electrical coils 4. The magnetic component 1 does not include any major electrical coils 3. The magnetic component 1 may also include more than one (for instance, two or three or more) minor electrical coil 4 per side of the square ring-shaped magnetic core 2.

[0195] With this configuration, a ring-thickness 31, i.e. a distance between an inner circumference 27 and an outer circumference 19 of the magnetic core 2, can be advantageously increased with respect to that of the embodiments 12 to 13.

[0196] FIG. 17 shows a schematic plan view of a magnetic component 1 according to a seventeenth embodiment of the present disclosure.

[0197] Herein, the magnetic component 1 includes two minor electrical coils 4 disposed respectively between two adjacent corner portions 17 of the square ring-shaped magnetic core 2. In total, the magnetic component 1 of this embodiment includes thus eight minor electrical coils 4. The magnetic component 1 may also include more than two minor electrical coils 4 disposed respectively between two of said corner portions 17.

[0198] FIG. 18 shows a schematic cross-sectional drawing of the magnetic component 1 according to the seventeenth embodiment of the present disclosure.

[0199] As can be taken from FIG. 18, the magnetic core 2 includes a raised portion 28. For each set of two minor electrical coils 4 (see: FIG. 17), the magnetic core 2 includes one raised portion 28. Therein, the raised portions 28 are disposed at portions of the magnetic core 2, around which the minor electrical coils 4 are wound.

[0200] As shown in FIG. 18, the raised portions 28 correspond to magnetic core 2 portions which are disposed on top of the top surface 11 of the magnetic core 2 at non-raised portions thereof. The raised portions 28 are preferably formed integrally with non-raised portions of the magnetic core 2.

[0201] FIG. 19 shows a schematic plan view of a magnetic component 1 according to an eighteenth embodiment of the present disclosure.

[0202] As can be taken from FIG. 19, the magnetic core 2 includes slits 29 formed therein, especially between adjacent corner portions 17 thereof. The slits 29 each define connecting portions 30 of the magnetic core 2. In particular, each slit defines two connecting portions 30, which connect adjacent corner portions 17 of the magnetic core 2. Herein, the corner portions 17 are defined by the ends of the slits 29. The magnetic core 2 may also include more than one (for instance, two or three or more) slit 29 per side of the magnetic core 2.

[0203] The magnetic component 1 includes eight minor electrical coils 4, one wound around each connecting portion 30 of the magnetic core 2 and disposed between adjacent corner portions 17 thereof. The magnetic component 1 may include more than one (for instance two or three or more) minor electrical coil 4 wound around each connection portion 30 of the magnetic core 2.

[0204] As can be taken from FIG. 19, a length 33 of each of the slits 29 is in this example equal to a length 34 of the respective inner side surface of the magnetic core 2, which forms a part of the inner circumference 27 of the magnetic core 2. The length 33 of each of the slits 29 may also be slightly (for instance, 1.2 times) larger or slightly smaller (for instance, 0.8 times) than the length 34 of the respective inner side surface of the magnetic core 2.

[0205] FIG. 20 shows a schematic cross-sectional drawing of the magnetic component 1 according to the eighteenth embodiment of the present disclosure.

[0206] As can be taken from FIG. 20, the magnetic core 2 further includes the raised portions 28. The raised portions 28, although not visible in cross-section, include the slits 29 and connecting portions 30 shown in FIG. 19.

[0207] The magnetic components 1 of embodiments thirteen to fifteen are preferably primary magnetic components. The magnetic components 1 of embodiments sixteen to eighteen are preferably secondary magnetic components.

[0208] FIG. 21 shows a schematic plan view of a magnetic component 1 according to a nineteenth embodiment of the present disclosure.

[0209] The magnetic component 1 of the present embodiment includes a hexagonal ring-shaped magnetic core 2 and six major electrical coils 3. The magnetic component 1 thus includes one major electrical coil 3 for each side 8 of the magnetic core 2. Corners 17 are defined between the sides 8 of the magnetic core 2. The magnetic component 1 may include more than one (for instance, two or three or more) major electrical coils 3 for each side 8 of the magnetic core 2.

[0210] The major electrical coils 3 are tapered towards the center 18 of the magnetic core 2. In other words, the major electrical coils 3 are tapered from the outer circumference 19 towards the inner circumference 27 of the magnetic core 2.

[0211] The major electrical coils 3 of this embodiment are triangle-shaped. The major winding axis 13 of each major electrical coil 3 coincides with a center of each side 8 of the magnetic core 2. A gap is formed at each corner 17 between adjacent major electrical coils 3.

[0212] As shown herein, the magnetic field 21 projects from one major electrical coil 3 into one, especially only one, adjacent major electrical coil 3.

[0213] The magnetic component 1 of the nineteenth embodiment is preferably a primary magnetic component 1.

[0214] FIG. 22 shows a schematic plan view of a magnetic component 1 according to a twentieth embodiment of the present disclosure.

[0215] Herein, the magnetic component 1 including the hexagonal ring-shaped magnetic core 2 includes six minor electrical coils 4, one wound around each side 8 thereof. The minor winding axis 14 is parallel to an extension direction of each corresponding side 8 of the magnetic core 2. The magnetic component 1 may include more than one (for instance two or three or more) minor electrical coils 4 wound around each side 8 of the magnetic core 2.

[0216] Further, the ring-thickness 31 of the magnetic core 2 in the present embodiment is preferably larger than the ring-thickness 31 of the magnetic core 2 of the magnetic component 1 of embodiment nineteen.

[0217] Further, the minor electrical coils 4 shown in FIG. 22 may also be included in the magnetic component 1 of the nineteenth embodiment (FIG. 21), especially at corner portions 17 of the magnetic core 2 thereof.

[0218] The magnetic component of the twentieth embodiment is preferably a secondary magnetic component for the reception of electrical energy from a primary magnetic component, especially for the reception of electrical energy from the magnetic component 1 of the nineteenth embodiment.

[0219] FIG. 23 shows a schematic plan view of a magnetic component 1 according to a twenty-first embodiment of the present disclosure.

[0220] Herein, the magnetic component 1 includes a circular ring-shaped magnetic core 2. Further, the magnetic component 1 includes eight tapered major electrical coils 3. The major electrical coils 3 are tapered towards the center 18 of the magnetic core 2. The major electrical coils 3 are distributed evenly around the circular magnetic core 2.

[0221] The magnetic component 1 may include less or more than eight major electrical coils 3. For instance, the magnetic component 1 may include one or more, especially four or six, or more than eight major electrical coils 3, especially distributed evenly around the magnetic core 2.

[0222] As shown herein, the magnetic field 21 projects from one major electrical coil 3 into one, especially only one, adjacent major electrical coil 3.

[0223] FIG. 24 shows a schematic plan view of a magnetic component 1 according to a twenty-second embodiment of the present disclosure.

[0224] Herein, the magnetic component 1 includes the circular ring-shaped magnetic core 2 as well as eight minor electrical coils 4. The minor electrical coils 4 are distributed evenly around the circular magnetic core 2. The magnetic component 1 may include more or less than eight minor electrical coils 4. For instance, the magnetic component 1 may include one or more, especially four or six or more than eight minor electrical coils 4, especially distributed evenly around the magnetic core 2.

[0225] Further, the minor electrical coils 4 shown in FIG. 24 may also be provided in the magnetic component 1 of embodiment twenty-one (FIG. 23), especially between the major electrical coils 3.

[0226] Further, the ring-thickness 31 is thicker in the present embodiment than in embodiment twenty-one.

[0227] Preferably, the magnetic component 1 of embodiment twenty-one is a primary magnetic component, whereas the magnetic component 1 of embodiment twenty-two is preferably a secondary magnetic component. In particular, the magnetic component 1 of embodiment twenty-two may include the same number of minor electrical coils 4 as the number of major electrical coils 3 in the magnetic component 1 of the twenty-first embodiment.

[0228] In all foregoing embodiments, the magnetic components 1 including the major electrical coils 3 are preferably primary magnetic components, whereas those magnetic components 1 including no major electrical coils 3 are preferably secondary magnetic components.

[0229] FIG. 25 shows a schematic diagram of a transformer 100 of the present disclosure.

[0230] The transformer 100 includes a primary magnetic component 101 and a secondary magnetic component 102. Energy is transferred via magnetic field lines 32 from the primary magnetic component 101 to the secondary magnetic component 102.

[0231] The transformer is, for example, a transformer for wireless charging. For example, the primary magnetic component 101 may be included in a wireless charger, whereas the secondary magnetic component 102 may be included in a mobile phone or an automobile.

[0232] As described in the foregoing, the magnetic components 1 including major electrical coils 3 are preferably employed as primary magnetic components 101 in the transformer 100 of the present disclosure. Further, those magnetic components 1 of the foregoing embodiments including no major electrical coils 3 are preferably employed as secondary magnetic components 102 in the transformer 100 of the present disclosure.

[0233] Alternatively, it is to be understood that any one of the magnetic components 1 according to any one of the embodiments one to twenty-two are preferably employed as primary magnetic components 101. Further, any one of the magnetic components 1 according to any one of the embodiments one to twenty-two are preferably employed as secondary magnetic components 102.

[0234] In addition to the foregoing written explanation of the disclosure, it is explicitly referred to FIGS. 1 to 25, which in detail show features of the disclosure.