Magnetic components

Abstract

We provide magnetic components manufactured using injection molding, which allows for improved assembly precision. [Solution] The magnetic component includes a first core component 10, a second core component 12, and at least one coil. The first core component includes a first molded bobbin 100 that covers a first portion 26a of the core set 26 by an injection molding process. The second core component includes a second molded bobbin 120 that covers a second portion 26b of the core set by an injection molding process. The first core component is combined with the second core component to form a first pillar and a second pillar. Each of the first and second pillars includes a plurality of cores 260 stacked on top of each other in an outward or inward direction of the magnetic component. At least one coil is wound around at least one of the first and second pillars.

Description

Technical Field

[0001] The present invention relates to magnetic components, and more particularly to magnetic components that utilize an injection molding process to form a molded bobbin that covers a core set.

Background Art

[0002] Magnetic components are important electrical components used to store energy, convert energy, and isolate electricity. In most circuits, magnetic components are always attached. Generally, magnetic components mainly include reactors, transformers, and inductors. In conventional magnetic components, a bobbin, a core, and a spacer are assembled by adhesion. However, the assembly process is complicated because the number of components is too large. The accumulation of component tolerances makes the overall tolerance of the assembly overly large. Therefore, it is difficult to control the screwing position, the electrical characteristics are poor, the appearance is skewed, the size cannot be miniaturized, the amount of potting adhesive increases, and the process time increases. As a result, there is a waste of cost or size.

Summary of the Invention

[0003] In order to solve the above problems, the present invention provides a magnetic component that utilizes an injection molding process to form a molded bobbin that covers a core set.

[0004] According to one embodiment of the present invention, a magnetic component comprises a first core component, a second core component, and at least one coil. The first core component includes a first molded bobbin covering a first portion of the core set by an injection molding process. The second core component includes a second molded bobbin covering a second portion of the core set by an injection molding process. The first core component is assembled to the second core component to form a first pillar and a second pillar, each of which includes a plurality of cores stacked on top of each other in the outward direction of the magnetic component, the joint of the first pillar having a first gap, and the joint of the second pillar having a second gap, the first gap being larger than the second gap. At least one coil is wound around at least one of the first pillar and the second pillar.

[0005] According to another embodiment of the present invention, the magnetic component comprises a first core component, a second core component, and at least one coil. The first core component includes a first molded bobbin covering a first portion of the core set by an injection molding process. The second core component includes a second molded bobbin covering a second portion of the core set by an injection molding process. The first core component is assembled to the second core component to form a first pillar and a second pillar, each of which includes a plurality of cores stacked on top of each other in an inward direction toward the magnetic component, with the length of the first pillar being greater than the length of the second pillar. At least one coil is wound around at least one of the first pillar and the second pillar.

[0006] As described above, the present invention utilizes an injection molding process to form a first molded bobbin and a second molded bobbin covering a core set, and then assembles the first core component onto the second core component to form a first pillar and a second pillar. In one embodiment, the present invention may stack the cores toward the outside of the magnetic component such that a first gap and a second gap are formed at the joint between the first pillar and the second pillar. This first gap is larger than the second gap. The first and second gaps may be used to absorb tolerances in the core and / or spacer sheet in order to reduce the length difference between the first and second pillars. Thus, the lengths of the first and second pillars are substantially the same after assembly. Furthermore, because the shape tolerance of the assembled core set and / or spacer sheet set is small, the molded bobbin can be made even thinner, reducing the height or width of the magnetic component. In another embodiment, the present invention may stack the cores toward the inside of the magnetic component such that the length of the first pillar is greater than the length of the second pillar. This reduces the tolerance of the gap between the first and second pillars, and / or the tolerance of the magnetic path. In this embodiment, the molded bobbin may be thicker to maintain the shape of the magnetic component, and as a result, the magnetic component is no longer affected by the shape tolerance of the core set and / or spacer sheet set after assembly.

[0007] These and other objects of the present invention will become undoubtedly apparent to those skilled in the art after reading the following detailed description of preferred embodiments shown in various figures and drawings. [Brief explanation of the drawing]

[0008] [Figure 1] This is a perspective view showing a magnetic component according to one embodiment of the present invention. [Figure 2] Figure 1 is an assembly diagram showing the first core component and the second core component. [Figure 3]Figure 2 is an exploded view showing the first and second core components. [Figure 4] Figure 3 is a front view showing the core set. [Figure 5] Figure 4 is an assembly diagram showing the core set. [Figure 6] Figure 5 is a side view showing the core set. [Figure 7] This is a cross-sectional view showing a magnetic component according to another embodiment of the present invention. [Figure 8] This is a front view showing a magnetic component according to another embodiment of the present invention. [Figure 9] This is a front view showing the magnetic component shown in Figure 8, which does not have a coil. [Figure 10] This is a perspective view showing the temperature sensor positioned on the holder. [Figure 11] This is an exploded view showing the temperature sensor, holder, and heat conductive member. [Figure 12] This is an assembly diagram showing a first core component and a second core component according to another embodiment of the present invention. [Figure 13] Figure 12 is a front view showing the core set consisting of the first core component and the second core component. [Figure 14] Figure 13 is an assembly diagram showing the core set. [Modes for carrying out the invention]

[0009] Referring to Figures 1 to 6, Figure 1 is a perspective view showing a magnetic component 1 according to one embodiment of the present invention, Figure 2 is an assembly diagram showing the first core component 10 and the second core component 12 shown in Figure 1, Figure 3 is an exploded view showing the first core component 10 and the second core component 12 shown in Figure 2, Figure 4 is a front view showing the core set 26 shown in Figure 3, Figure 5 is an assembly diagram showing the core set 26 shown in Figure 4, and Figure 6 is a side view showing the core set 26 shown in Figure 5.

[0010] The magnetic component 1 of the present invention may be a reactor, a transformer, an inductor, or other magnetic component. As shown in Figures 1 to 3, the magnetic component 1 comprises a first core component 10, a second core component 12, at least one coil 14, a base 16, a first fixing component 18, and a second fixing component 20. The first core component 10 is assembled to the second core component 12 to form a first pillar 22 and a second pillar 24. The first fixing component 18 is configured to fix the first core component 10 to the base 16, and the second fixing component 20 is configured to fix the second core component 12 to the base 16. The first fixing component 18 and the second fixing component 20 may be screws or bolts, but are not limited to these. In this embodiment, the joint between the first core component 10 and the second core component 12 may be open and facing each other, and as a result, the space between the first core component 10 and the second core component 12 can be used to absorb volume expansion of the first core component 10 and the second core component 12 due to temperature fluctuations. The coil 14 is wound around at least one of the first pillar 22 and the second pillar 24. In this embodiment, two coils are wound around the first pillar 22 and the second pillar 24, respectively.

[0011] As shown in Figure 3, the first core component 10 includes a first molding bobbin (winding frame) 100 and a first part 26a of the core set 26, and the second core component 12 includes a second molding bobbin 120 and a second part 26b of the core set 26. In this embodiment, the core set 26 comprises a plurality of cores 260, and the cores 260 may be divided into a first part 26a of the first core component 10 and a second part 26b of the second core component 12.

[0012] As shown in Figures 1 and 2, the first fixing component 18 may fix the first core component 10 to the base 16 through the fixing hole 102 of the first molding bobbin 100. The second fixing component 20 may fix the second core component 12 to the base 16 through the fixing hole 122 of the second molding bobbin 120. In this embodiment, the fixing holes 102 and 122 may be circular holes or regularly polygonal holes. As a result, after the first fixing component 18 and the second fixing component 20 are fixed to the base 16 through the fixing holes 102 and 122, the first molding bobbin 100 and the second molding bobbin 120 are fixed and immobile.

[0013] The present invention utilizes an injection molding process to form a first molded bobbin 100 covering a first portion 26a of the core set 26 and a second molded bobbin 120 covering a second portion 26b of the core set 26. As shown in Figure 4, the present invention may place the first portion 26a of the core set 26 in a mold (not shown). In the mold, ejector pins 28 abut against the cores 260, and the cores 260 are stacked on top of each other in an outward direction D1 of the magnetic component 1. Next, the present invention performs an injection molding process to form the first molded bobbin 100 covering the first portion 26a of the core set 26. Similarly, as shown in Figure 4, the present invention may place the second portion 26b of the core set 26 in another mold (not shown). In the mold, ejector pins 28 abut against the cores 260, and the cores 260 are stacked on top of each other in an outward direction D1 of the magnetic component 1. Next, the present invention performs an injection molding process to form a second molding bobbin 120 that covers the second portion 26b of the core set 26. Thus, after the first core component 10 is assembled to the second core component 12, each of the first pillar 22 and the second pillar 24 contains a plurality of cores 260 stacked on top of each other in the outward direction D1 of the magnetic component 1.

[0014] Since the first pillar 22 and the second pillar 24 are formed by stacking multiple small cores 260, the present invention can reduce the mold cost for manufacturing the cores 260 and extend the mold life, thereby reducing the cost of the cores 260 and increasing the yield. However, each of the cores 260 or spacer sheets has individual tolerances. After the first core component 10 is assembled to the second core component 12, the individual tolerances of the cores and / or spacer sheets accumulate, and the lengths of the first pillar 22 and the second pillar 24 may differ. To solve this problem, as shown in Figure 5, the cores 260 are stacked in the outward direction D1 of the magnetic component 1 such that a first gap G1 is formed at the joint 220 of the first pillar 22 and a second gap G2 is formed at the joint 240 of the second pillar 24. Therefore, after the first core component 10 is assembled to the second core component 12, the joint 220 of the first pillar 22 has a first gap G1, and the joint 240 of the second pillar 24 has a second gap G2. Because the tolerances of the core 260 and / or spacer sheet are different, the first gap G1 is larger than the second gap G2. The first gap G1 and the second gap G2 can be used to absorb the tolerances of the core 260 and / or spacer sheet, thereby reducing the difference in length between the first pillar 22 and the second pillar 24. Thus, the lengths of the first pillar 22 and the second pillar 24 become substantially the same after assembly. Furthermore, because the shape tolerance of the core set 26 after assembly is small, the first and second molding bobbins 100, 120 can be made even thinner to reduce the height or width of the magnetic component 1.

[0015] The first forming bobbin 100 and the second forming bobbin 120 can be tightly attached to the core 260 without a gap by an injection molding process, so that the rigidity of the overall structure of the magnetic component 1 becomes relatively high, and further, the risk of defects in reliability tests such as mechanical shock or vibration is reduced. Further, the tolerances of each component are completed after absorption after injection molding. The external dimensions of the magnetic component 1 are stable and precise, and since the gap between the first core component 10, the second core component 12, and the base 16 is also relatively stable, the present invention can effectively control the amount of potting adhesive. If the amount of the adhesive is controlled, the potting time can also be stable, thereby saving the time for adding the adhesive.

[0016] It should be noted that in some embodiments, two adjacent cores 260 at the joint 240 of the second pillar 24 may contact each other so that the second gap G2 becomes zero.

[0017] In this embodiment, the magnetic component 1 may further include a first spacer structure 32 and a second spacer structure 34. As shown in FIG. 5, the first spacer structure 32 is disposed in the first gap G1, and the second spacer structure 34 is disposed in the second gap G2. Since the first gap G1 is larger than the second gap G2, the thickness of the first spacer structure 32 is larger than the thickness of the second spacer structure 34. In this embodiment, the first spacer structure 32 and the second spacer structure 34 may be injection molding materials formed by an injection molding process. In another embodiment, the first spacer structure 32 and the second spacer structure 34 may be spacer sheets. When the first spacer structure 32 and the second spacer structure 34 are spacer sheets, the first spacer structure 32 and the second spacer structure 34 are first stacked together with the core 260 in the mold, and then an injection molding process is performed to form the first and second forming bobbins 100, 120.

[0018] In this embodiment, the shapes of the first core component 10 and the second core component 12 may be determined according to the number of cores 260. For example, the shapes of the first core component 10 and the second core component 12 may be U-shaped, J-shaped, L-shaped, I-shaped or other shapes. Preferably, the shape of the first core component 10 may be the same as the shape of the second core component 12 (e.g., U-shaped or J-shaped), and the first core component 10 and the second core component 12 may share one single mold in order to save the cost of other molds. In this embodiment, the magnetic component 1 may further include a plurality of spacer sheets 30, and each of the spacer sheets 30 is located between two of the cores 260. The spacer sheet 30 may be made of a non-magnetic material or may be made of a magnetic material having a lower magnetic permeability than the core set 26. The core 260 and the spacer sheet 30 may be connected by an adhesive or may be connected by an injection molding process according to the actual use. According to one embodiment, the first spacer structure 32 and the second spacer structure 34 may be omitted from the joints 220, 240.

[0019] As shown in FIGS. 5 and 6, the core set 26 has a wound portion 262 and an unwound portion 264. In this embodiment, the first width W1 of the wound portion 262 is larger than the second width W2 of the unwound portion 264, the third width W3 of the wound portion 262 is smaller than the fourth width W4 of the unwound portion 264, and the product of the first width W1 and the third width W3 is equal to the product of the second width W2 and the fourth width W4 (that is, W1 * W3 = W2 * W4). In this embodiment, the fourth width W4 is larger than the third width W3. When the fourth width W4 increases, the second width W2 decreases, and as a result, the overall height of the magnetic component 1 can decrease.

[0020] Referring to FIG. 7, FIG. 7 is a cross-sectional view showing a magnetic component 1 according to another embodiment of the present invention.

[0021] As shown in Figure 7, each of the joints 220 and 240 between the first pillar 22 and the second pillar 24 has an opening 36. The position of the opening 36 corresponds to the position of the ejector pin 28 shown in Figure 4. The opening 36 is formed during the injection molding process. After the injection molding process, one of the cores 260 is exposed through the opening 36. It should be noted that the present invention may have more ejector pins positioned at other locations in the mold, allowing a portion of the core 260 to be exposed after the injection molding process to improve heat dissipation efficiency. Furthermore, a filling space 38 may exist between the core 260 and the recessed structure of the spacer sheet 30, and the injection molding process fills the filling space 38 with injection molding material. Thus, the core 260 and the spacer sheet 30 may be connected by the injection molding process. It should be noted that the shape of the spacer sheet 30 may be determined according to the actual application, so the present invention is not limited to the illustrated embodiment. Furthermore, the first molding bobbin 100 and the second molding bobbin 120 further form the first spacer structure 32 and the second spacer structure 34 during the injection molding process. Since the first molding bobbin 100 and the second molding bobbin 120 can completely cover the core 260 with injection molding material (e.g., plastic), the creepage distance of safety regulations can be completely ignored.

[0022] Referring to Figures 8 and 9, Figure 8 is a front view showing a magnetic component 1 according to another embodiment of the present invention, and Figure 9 is a front view showing the magnetic component 1 shown in Figure 8 without the coil 14.

[0023] As shown in Figures 8 and 9, the magnetic component 1 may further include a temperature sensor 40 and a holder 42. The temperature sensor 40 is positioned on the holder 42, and the holder 42 is positioned between the coils 14 such that the temperature sensor 40 is positioned adjacent to one of the coils 14. Furthermore, at least one recess 44 is formed on at least one inner surface of the first molded bobbin 100 and the second molded bobbin 120, and the temperature sensor 40 is positioned in a location corresponding to at least one recess 44. In this embodiment, two recesses 44 are formed on the opposing inner surfaces of the first molded bobbin 100 and the second molded bobbin 120, but the present invention is not limited thereto. Preferably, the temperature sensor 40 interferes with (interposes with) the coils 14 to ensure that the temperature sensor 40 accurately measures the temperature of the magnetic component 1. The recesses 44 are configured to accommodate at least a portion of the coils 14. If the volume of all components increases due to heat or tolerances, at least a portion of the coil 14 can extend into the recess 44, so that the recess 44 absorbs the tolerances and thermal expansion of all components and prevents damage to the temperature sensor 40. It should be noted that, in addition to the first and second molding bobbins 100 and 120, the recess 44 may also be applied to an assembly-type bobbin.

[0024] Referring to Figures 10 and 11, Figure 10 is a perspective view showing the temperature sensor 40 positioned on the holder 42, and Figure 11 is an exploded view showing the temperature sensor 40, the holder 42, and the heat conductive member 46.

[0025] As shown in Figure 11, the magnetic component 1 may further include a heat conduction member 46. The heat conduction member 46 may be, but is not limited to, a ceramic plate. As shown in Figure 10, the heat conduction member 46 is placed in the holder 42, and the temperature sensor 40 is placed on the heat conduction member 46. Thus, in order to effectively measure the maximum temperature of the magnetic component 1, the temperature of the magnetic component 1 can be effectively conducted to the temperature sensor 40 via the heat conduction member 46.

[0026] Referring to Figures 12 to 14, Figure 12 is an assembly diagram showing a first core component 10 and a second core component 12 according to another embodiment of the present invention, Figure 13 is a front view showing a core set 26 of the first core component 10 and the second core component 12 shown in Figure 12, and Figure 14 is an assembly diagram showing the core set 26 shown in Figure 13.

[0027] In the present invention, the first core component 10 and the second core component 12 of the aforementioned magnetic component 1 may be replaced with the first core component 10 and the second core component 12 shown in Figure 12. As shown in Figures 12 and 13, the present invention utilizes an injection molding process to form a first molded bobbin 100 covering the first portion 26a of the core set 26 and a second molded bobbin 120 covering the second portion 26b of the core set 26. As shown in Figure 13, the present invention may place the first portion 26a of the core set 26 in a mold (not shown). Inside the mold, ejector pins 28 abut against the core 260, and the cores 260 are stacked on top of each other in the inward direction D2 of the magnetic component 1. Next, the present invention performs an injection molding process to form the first molded bobbin 100 covering the first portion 26a of the core set 26. Similarly, as shown in Figure 13, the present invention may place the second portion 26b of the core set 26 in another mold (not shown). Within the mold, the ejector pins 28 contact the cores 260, and the cores 260 are stacked on top of each other in a direction D2 toward the inside of the magnetic component 1. Next, the present invention performs an injection molding process to form a second molding bobbin 120 that covers the second portion 26b of the core set 26. Thus, after the first core component 10 is assembled to the second core component 12, each of the first pillar 22 and the second pillar 24 contains a plurality of cores 260 stacked on top of each other in a direction D2 toward the inside of the magnetic component 1. As shown in Figure 14, the length L1 of the first pillar 22 is greater than the length L2 of the second pillar 24.

[0028] In this embodiment, the present invention stacks the cores 260 toward the inside of the magnetic component 1 in a direction D2 such that the length L1 of the first pillar 22 is greater than the length L2 of the second pillar 24, thereby reducing the tolerance of the internal gap between the first pillar 22 and the second pillar 24 and / or reducing the tolerance of the magnetic path. In this embodiment, the first and second molded bobbins 100, 120 may be made thicker to maintain the shape of the magnetic component 1 and so that the shape tolerance of the core set 26 after assembly does not affect the magnetic component 1. After assembly, the tolerance of the magnetic path is reduced regardless of whether a gap exists between the first pillar 22 and the second pillar 24. In another embodiment, the first pillar 22 may have at least one first gap G1 and / or the second pillar 24 may have at least one second gap G2. The sum of the at least one first gap G1 is equal to the sum of the at least one second gap G2. It should be noted that the same elements in Figures 12 to 14 and Figures 1 to 11 are indicated by the same reference numerals. Therefore, the explanations will not be repeated here.

[0029] As shown in Figure 14, the first pillar 22 may have three first gaps G1, and the second pillar 24 may have three second gaps G2, with the three first gaps G1 distributed in the first pillar 22 and the three second gaps G2 distributed in the second pillar 24, and the sum of the three first gaps G1 being the same size as the sum of the three second gaps G2. In some embodiments, the first pillar 22 may have a single first gap G1, and the second pillar 24 may have a single second gap G2, with the single first gap G1 being the same size as the single second gap G2. In some embodiments, there may be spacer sheets 30 positioned in the first gaps G1 and / or second gaps G2. In some embodiments, the first molding bobbin 100 and the second molding bobbin 120 may be doped with magnetic powder (as shown in Figure 12). In some embodiments, the first gap G1 and the second gap G2 can be omitted, and as a result, the present invention can reduce the tolerance of the magnetic path due to the tolerance of the core 260.

[0030] As shown in Figures 12 and 14, the first molding bobbin 100 has an opening 36 on the side away from the joints 220 and 240 between the first pillar 22 and the second pillar 24, respectively, through which one of the cores 260 is exposed. Similar to the opening 36 of the first molding bobbin 100, the second molding bobbin 120 also has an opening (not shown) on the side away from the joints 220 and 240 between the first pillar 22 and the second pillar 24, respectively, through which one of the cores 260 is exposed. The location of the opening 36 corresponds to the location of the ejector pins 28 shown in Figure 13. The opening 36 is formed during the injection molding process. After the injection molding process, one of the cores 260 is exposed through the opening 36. It should be noted that the present invention may have more ejector pins positioned at other locations in the mold, and that after the injection molding process, a portion of the core 260 may be exposed to improve heat dissipation efficiency.

[0031] As described above, the present invention utilizes an injection molding process to form a first molded bobbin and a second molded bobbin covering a core set, and then assembles the first core component onto the second core component to form a first pillar and a second pillar. In one embodiment, the present invention can stack cores on each other in an outward direction of the magnetic component such that a first gap and a second gap are formed at the joint between the first pillar and the second pillar. This first gap is larger than the second gap. The first and second gaps may be used to absorb tolerances in the core and / or spacer sheet in order to reduce the length difference between the first and second pillars. Thus, the lengths of the first and second pillars become substantially the same after assembly. Furthermore, because the shape tolerance of the assembled core set and / or spacer sheet set is small, the molded bobbins may be made thinner to reduce the height or width of the magnetic component. In another embodiment, the present invention may stack cores on each other in an inward direction of the magnetic component such that the length of the first pillar is greater than the length of the second pillar. This reduces the tolerance of the gap between the first and second pillars, and / or the tolerance of the magnetic path. In this embodiment, the molded bobbin can be made thicker to maintain the shape of the magnetic component, and as a result, the magnetic component is not affected by the shape tolerance of the core set and / or spacer sheet set after assembly.

[0032] Those skilled in the art will readily understand that many modifications and changes to the apparatus and method can be made while retaining the teachings of the present invention. Accordingly, the above disclosure should be construed as being limited only to the scope of the appended claims.

Claims

1. At least one coil, A first core component, including a first molding bobbin that covers a first portion of the core set by an injection molding process, A magnetic component having a second core component, which includes a second molding bobbin that covers the second portion of the core set by an injection molding process, The first core component is assembled to the second core component to form a first pillar and a second pillar, and each of the first pillar and the second pillar includes a plurality of cores arranged stacked on top of each other in an outward or inward direction toward the magnetic component. A portion of the first molding bobbin and / or the second molding bobbin is formed on the first and second external structures, The first pillar of the first core component or the second core component is provided with only one first joint. The second pillar of the first core component or the second core component is provided with only one second joint. The first external structure is located at the first joint of the first pillar of the first core component or the second core component, and is provided between the plurality of cores. The second external structure is located at the second joint of the second pillar of the first core component or the second core component, and is provided between the plurality of cores. The at least one coil is wound around at least one of the first pillar and the second pillar. The first portion of the core set has a first winding portion and a first unwinding portion, The second portion of the core set has a second winding portion and a second unwinding portion, The first external structure is provided between a plurality of cores in the first winding portion of the first pillar, The second external structure is provided between a plurality of cores in the second winding portion of the second pillar, In the first portion, there is no gap in at least one portion between the core of the first unwinding portion and the core of the first winding portion that is in contact with the core of the first unwinding portion. In the second portion, there is no gap in at least one portion between the core of the second unwinding portion and the core of the second winding portion that is in contact with the core of the second unwinding portion. A magnetic component wherein the first external structure and the second external structure prevent the tolerances of the multiple cores from affecting the shape of the first core component and the second core component.

2. The magnetic component according to claim 1, wherein the shape of the first core component is the same as the shape of the second core component.

3. The magnetic component according to claim 1, wherein each of the first joint of the first pillar and the second joint of the second pillar has an opening, and one of the cores is exposed through the opening.

4. moreover, The base and, A first fixing component configured to fix the first core component to the base, The second core component comprises a second fixing component configured to fix the base, The magnetic component according to claim 1, wherein the first joint and the second joint are not fixed to each other and face each other.

5. moreover, A first spacer structure is disposed within the first gap, The magnetic component according to claim 1, further comprising a second spacer structure disposed within the second gap.

6. The magnetic component according to claim 5, wherein the first spacer structure and the second spacer structure are injection-molded materials formed by an injection molding process.

7. The magnetic component according to claim 6, wherein the first spacer structure and the second spacer structure are spacer sheets.

8. The magnetic component according to claim 1, wherein the first width of the first winding portion is greater than the second width of the first unwinding portion, the third width of the first winding portion is less than the fourth width of the first unwinding portion, and the product of the first width and the third width is equal to the product of the second width and the fourth width.

9. The magnetic component according to claim 1, further comprising a plurality of spacer sheets, each spacer sheet positioned between two of the cores.

10. The magnetic component according to claim 9, wherein the core and the spacer sheet are connected by an adhesive or by an injection molding process.

11. The magnetic component according to claim 9, wherein a filling space exists between the core and the recessed structure of the spacer sheet, and an injection molding material is filled into the filling space by an injection molding process.

12. The magnetic component according to claim 11, further comprising a temperature sensor positioned adjacent to at least one of the coils, wherein at least one recess is formed on at least one inner surface of the first molding bobbin and the second molding bobbin, the temperature sensor is positioned corresponding to at least one of the recesses, and the recess is configured to accommodate at least a portion of at least one of the coils.

13. moreover, A holder positioned adjacent to at least one of the coils, The magnetic component according to claim 1, comprising a heat conductive member disposed in the holder, wherein the temperature sensor is disposed in the heat conductive member.

14. The plurality of cores in the first pillar and the second pillar are arranged in a stacked manner toward the inside of the magnetic component. The length of the first pillar is greater than the length of the second pillar. The first pillar has at least one first gap, the second pillar has at least one second gap, and the sum of the at least one first gap is equal to the sum of the at least one second gap. The length of the first pillar is the total length after stacking the plurality of cores, the first external structure, and at least one first gap included in the first pillar. The length of the second pillar is the total length after stacking the multiple cores, the second external structure, and at least one second gap included in the second pillar. The magnetic component according to claim 1.

15. The first external structure has a first thickness that absorbs the tolerances of the multiple cores, The second external structure has a second thickness that absorbs the tolerances of the multiple cores, The magnetic component according to claim 1.

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