Coupled magnetic element and coupled magnetic module with high power density and low DC resistance

Abstract

Coupled magnetic element with high power density and low DC resistance (1A), comprising: - a first magnetic core (11) comprising a cover body (111) and a magnetic core column (112), the cover body (111) comprising two first side walls (1111) and a first connecting wall (1112), each of the first side walls (1111) forming a first receiving chamber (S1) with the first connecting wall (1112), while the magnetic core column (112) is connected to the first connecting wall (1112) and is located inside the first receiving chamber (S1); - an outer coil (13) which is removably arranged within the first receiving chamber (S1) and comprises two first side columns (131) and a first connecting section (132), wherein the first connecting section (132) is connected at both ends to the upper end of one of the first side columns (131) and forms a receiving space (S3) with each of the first side columns (131); - an inner coil (14) which is removably arranged within the receiving space (S3) and comprises two second side columns (141), a second connecting section (142) and two lower connecting leg sections (143), wherein the two ends of the second connecting section (142) are each connected to the upper end of one of the second side columns (141), while the lower end of each of the second side columns (141) is connected to one of the lower connecting leg sections (143), wherein the second side columns (141), the second connecting section (142) and each of the lower connecting leg sections (143) form a receiving space (S4) for receiving the magnetic core column (112); and - a second magnetic core (12) which is detachably connected in a horizontal direction (D1) to the first magnetic core (11) to create a chamber (S) in which the outer coil (13), the inner coil (14) and the magnetic core column (112) are located.

Description

[0001] The present invention relates to a magnetic element, in particular a coupled magnetic element, characterized by low loss and high power density.

[0002] In current technology, electronic devices are evolving towards high efficiency and high power density. For example, in power supply devices, the inductors used are typically relatively large and take up a relatively large amount of space, which is why reducing the size of an inductor element has become an important topic in the relevant technology fields.

[0003] Conventional inductors are usually individual and separate components. To achieve high voltage withstand capability, their volume must be increased, or several small inductors must be connected in series across a conductive layer on a printed circuit board. However, this would require more space and hinders the miniaturization of electronic devices.

[0004] To overcome the shortcomings of the prior art, the present invention provides a coupled magnetic element with high power density and low DC resistance, comprising a first magnetic core, an outer coil, an inner coil, and a second magnetic core. The first magnetic core has a cover body and a magnetic core column. The cover body has two first side walls and a first connecting wall, each of the first side walls forming a first receiving chamber with the first connecting wall, while the magnetic core column is connected to the first connecting wall and is located within the first receiving chamber.The outer coil is removably arranged within the first receiving chamber and comprises two first side columns and a first connecting section, the first connecting section being connected at both ends to the upper end of each of the first side columns and forming a receiving space with each of the first side columns. The inner coil is removably arranged within the receiving space and comprises two second side columns, a second connecting section, and two lower connecting leg sections, the two ends of the second connecting section being connected at each of the upper ends of one of the second side columns, while the lower end of each of the second side columns is connected to one of the lower connecting leg sections. The second side columns, the second connecting section, and the two lower connecting leg sections form a housing for the magnetic core column.The second magnetic core is detachably connected to the first magnetic core in a horizontal direction to create a chamber containing the outer coil, the inner coil, and the magnetic core column.

[0005] The present invention further provides a coupled magnetic module with high power density and low DC resistance, comprising two first magnetic cores, two outer coils, an inner coil assembly, and a second magnetic core. Each of the first magnetic cores is arranged opposite each other and has a cover body and a magnetic core column. The cover body has two first side walls and a first connecting wall, each of the first side walls forming a first receiving chamber with the first connecting wall, while the magnetic core column is connected to the first connecting wall and is located within the first receiving chamber.Each of the outer coils is removably arranged within the first receiving chamber and comprises two first side columns and a first connecting section, the first connecting section being connected at both ends to the upper end of one of the first side columns and forming a receiving space with each of the first side columns. The inner coil assembly comprises two inner coils, each of which is removably arranged within one of the receiving spaces and includes two second side columns, a second connecting section, and two lower connecting leg sections running parallel to the plane in which the second connecting section is located. The two ends of the second connecting section are each connected to the upper end of one of the second side columns, while the lower end of each of the second side columns is connected to one of the lower connecting leg sections.The second side columns, the second connecting section, and the two lower connecting leg sections form a housing for a magnetic core column. Two adjacent lower connecting leg sections are connected to each other in the two inner coils. The second magnetic core is removable and positioned between two adjacent magnetic core columns, above the multiple lower connecting leg sections. Two adjacent lower connecting legs are connected to each other in the two inner coils. The two cover bodies are joined horizontally.

[0006] An advantageous effect of the present invention is that, according to some embodiments, the coupled magnetic element and the coupled magnetic module with high power density and low DC resistance according to the present invention offer the technical effect of high dielectric strength and high power density. Fig. Figure 1 shows a schematic spatial view of a coupled magnetic element with high power density and low DC resistance according to an embodiment of the present invention. Fig. Figure 2 shows a schematic exploded view of the [unclear text]. Fig. 1 illustrated embodiment. Fig. Figure 3 shows a schematic representation of an inner coil according to an embodiment of the present invention. Fig. Figure 4 shows a schematic representation of an inner coil according to an embodiment of the present invention. Fig. Figure 5 shows a schematic spatial view of a coupled magnetic element with high power density and low DC resistance according to a further embodiment of the present invention. Fig. Figure 6 shows a schematic exploded view of the [unclear text]. Fig. 5 illustrated embodiment. Fig. Figure 7 shows a schematic spatial view of a coupled magnetic module with high power density and low DC resistance according to an embodiment of the present invention. Fig. Figure 8 shows a schematic exploded view of the [unclear text]. Fig. 7 illustrated embodiment. Fig. Figure 9 shows a schematic representation of an inner coil assembly according to an embodiment of the present invention and Fig. Figure 10 shows a schematic representation of an inner coil assembly according to an embodiment of the present invention.

[0007] It will be directed to the Fig. 1 to 4 are referred to, whereby Fig. 1 a schematic spatial view of a coupled magnetic element with high power density and low DC resistance 1A according to an embodiment of the present invention, Fig. 2 a schematic exploded view of the in Fig. 1 illustrated embodiment, Fig. 3 a schematic representation of an inner coil 14 according to an embodiment of the present invention and Fig. Figure 4 shows a schematic representation of an inner coil 14 according to an embodiment of the present invention. The difference between Fig. 3 and Fig. 4 lies in the different perspectives.

[0008] The coupled magnetic element with high power density and low DC resistance 1A comprises a first magnetic core 11, an outer coil 13, an inner coil 14, and a second magnetic core 12. The first magnetic core 11 has a cover body 111 and a magnetic core column 112. The cover body 111 has two first side walls 1111 and a first connecting wall 1112, each of the first side walls 1111 forming a first receiving chamber S1 with the first connecting wall 1112, while the magnetic core column 112 is connected to the first connecting wall 1112 and is located within the first receiving chamber S1.The outer coil 13 is removably arranged within the first receiving chamber S1 and comprises two first side columns 131 and a first connecting section 132, wherein the first connecting section 132 is connected at both ends to the upper end of each of the first side columns 131 and forms a receiving space S3 with each of the first side columns 131. The inner coil 14 is removably arranged within the receiving space S3 and comprises two second side columns 141, a second connecting section 142, and two lower connecting leg sections 143, wherein the two ends of the second connecting section 142 are each connected to the upper end of one of the second side columns 141, while the lower end of the second side column 141 is connected to the lower connecting leg section 143.The second side columns 141, the second connecting section 142 and the two lower connecting leg sections 143 form a housing space S4 for receiving the magnetic core column 112. The second magnetic core 12 is detachably connected in the horizontal direction D1 to the first magnetic core 11 to create a chamber S in which the outer coil 13, the inner coil 14 and the magnetic core column 112 are located.

[0009] According to this embodiment, each of the first side columns 131 comprises a column body 1311 and a connecting leg 1312, wherein the connecting leg 1312 is arranged at the lower end of the column body 1311, extends to the outside of the column body 1311 and protrudes from the first magnetic core 11.

[0010] According to this embodiment, each lower connecting leg section 143 comprises, as shown in Fig. 3 and Fig. Figure 4 shows a base body 1431 and a base body 1432, wherein the base body 1431 is connected to the base body 1432. The two base bodies 1432 are arranged opposite each other and are each located outside one of the second side columns 141. The base body 1431 has a side edge 1431a and a slanted edge 1431b, each side edge 1431a being connected to one of the second side columns 141, while a slot G is provided between the two slanted edges 1431b. In addition, according to some embodiments, the base body 1431 has a geometric shape, wherein a slot G is provided between the mating base bodies 1431.For example, in this embodiment, the base body 1431 essentially has the shape of a right-angled triangle, the three sides of which consist of the oblique edge 1431b, the lateral edge 1431a, and a base edge, the base edge being connected to the base body 1432 (and thus forming an integral unit). According to some embodiments, the width of the slot G (i.e., the distance between the two oblique edges 1431b) is in the range of 0.1 mm to 0.5 mm.

[0011] It will be discussed again Fig. 1 referred. According to the in Fig. In the illustrated embodiment 1, the connecting legs 1312 are located between two base bodies 1432 and are assigned to the two base bodies 1432.

[0012] The first magnetic core 11 and the second magnetic core 12 can be made of ferrite or a soft magnetic material. The cover body 111 and the magnetic core column 112 can be formed as a single piece or be separate, separable elements. The second magnetic core 12, for example, is plate-shaped. The outer coil 13 is essentially in the shape of an arch. The outer coil 13 can be a flat coil, but is not limited to this. The outer coil 13 can also be made of a stamped copper sheet or of other types of conductive materials. The inner coil 14 can be partially enclosed by the outer coil 13. Each of the second side columns 141 and the second connecting section 142 of the inner coil 14 together have approximately the shape of a different arch. The inner coil 14 can be a flat coil, but is not limited to this.The inner coil 14 can also be made from a stamped copper sheet or from other types of conductive materials.

[0013] Furthermore, according to the in Fig. In the embodiment shown in Figures 1 to 4, the first magnetic core 11, the outer coil 13, and the second magnetic core 12 form a first inductor, while the first magnetic core 11 together with the inner coil 14 and the second magnetic core 12 form a second inductor. The gap between the first magnetic core 11 and the second magnetic core 12 forms an air gap, with multiple air gaps present between the first magnetic core 11 and the second magnetic core 12. The outer coil 13 and the inner coil 14 are insulated from each other. According to this embodiment, by controlling the contact relationship between the first magnetic core 11, the second magnetic core 12, and the coils (i.e., the outer coil 13 and the inner coil 14) and by configuring the air gap, the magnetic path and the coupling strength can be effectively adjusted, thus achieving precise control of the inductance.Simultaneously, the coil winding method and the design of the magnetic core structure allow for a shorter conductor path and reduced conductor loss, effectively lowering the DC resistance (DCR) to achieve an extremely low DC resistance. This improves the efficiency and overall power density of the coupled magnetic element.

[0014] Furthermore, in some embodiments of the coupled magnetic element with high power density and low DC resistance of the present invention, the first magnetic core 11, the outer coil 13, the inner coil 14 and the second magnetic core 12 can also be in contact with each other in isolation, thereby realizing a magnetic element structure characterized by extremely high dielectric strength, low losses and high power density.

[0015] It will be directed to the Fig. 5 and Fig. 6. Referenced, whereby Fig. 5 a schematic spatial view of a coupled magnetic element with high power density and low DC resistance 1B according to a further embodiment of the present invention and Fig. 6 a schematic exploded view of the in Fig. Figure 5 illustrates this embodiment. In this embodiment, the second magnetic core 12 comprises two second side walls 121, a second connecting wall 122, and a magnetic core column 123, wherein the second side walls 121 and the second connecting wall 122 form a second receiving chamber S2 in which the magnetic core column 123 is located. The second side walls 121 are detachably connected to the first side walls 1111. Due to this structure, the coupled magnetic element 1B can also offer the advantages of extremely high dielectric strength, low losses, and high power density.

[0016] It will be directed to the Fig. 7 to 10 referred to, whereby Fig. 7 a schematic spatial view of a coupled magnetic module with high power density and low DC resistance Z according to an embodiment of the present invention, Fig. 8 a schematic exploded view of the in Fig. 7 illustrated embodiment, Fig. 9 a schematic representation of an inner coil group 140 according to an embodiment of the present invention and Fig. Figure 10 shows a schematic representation of an inner coil assembly 140 according to an embodiment of the present invention. The difference between Fig. 9 and Fig. The reason lies in the different perspectives.

[0017] The coupled high-power-density, low-DC magnetic module Z comprises two first magnetic cores 11 (defined here as first magnetic core 11A and first magnetic core 11B), two outer coils 13 (defined here as outer coil 13A and outer coil 13B), an inner coil group 140, and a second magnetic core 12.

[0018] The first magnetic core 11A is arranged opposite the first magnetic core 11B. The first magnetic core 11A has a cover body 111A and a magnetic core column 112A. The cover body 111A has two first side walls 1111A and a first connecting wall 1112A, each of the first side walls 1111A forming a first receiving chamber S1 with the first connecting wall 1112A. The first magnetic core 11B has a cover body 111B and a magnetic core column 112B. The cover body 111B has two first side walls 1111B and a first connecting wall 1112B, each of the first side walls 1111B forming a first receiving chamber S1' with the first connecting wall 1112B. The magnetic core column 112A is connected to the first connecting wall 1112A and is located inside the first receiving chamber S1. The magnetic core column 112B is connected to the first connecting wall 1112B and is located inside the first receiving chamber S1'.

[0019] The outer coil 13A is removably arranged within the first receiving chamber S1. The outer coil 13B is removably arranged within the first receiving chamber S1'. The outer coil 13A comprises two first side columns 131A and a first connecting section 132A, wherein the first connecting section 132A is connected at both ends to the upper end of one of the first side columns 131A and forms a receiving chamber S3 with each of the first side columns 131A. The outer coil 13B comprises two first side columns 131B and a first connecting section 132B, wherein the first connecting section 132B is connected at both ends to the upper end of one of the first side columns 131B and forms a receiving chamber S3' with each of the first side columns 131B.

[0020] The inner coil assembly 140 comprises two inner coils 14 (defined here as inner coil 14A and inner coil 14B). Inner coil 14A is removably arranged within the receiving space S3. Inner coil 14B is removably arranged within the receiving space S3'. Inner coil 14A comprises two second side columns 141A, a second connecting section 142A, and two lower connecting leg sections 143A. The two ends of the second connecting section 142A are each connected to the upper end of one of the second side columns 141A, while the lower end of each of the second side columns 141A is connected to one of the lower connecting leg sections 143A. The second side columns 141A, the second connecting section 142A, and the two lower connecting leg sections 143A form a housing space S4 for receiving the magnetic core column 112A.The inner coil 14B comprises two second side columns 141B, a second connecting section 142B, and two lower connecting leg sections 143B. The two ends of the second connecting section 142B are each connected to the upper end of one of the second side columns 141B, while the lower end of each of the second side columns 141B is connected to one of the lower connecting leg sections 143B. The second side columns 141B, the second connecting section 142B, and the two lower connecting leg sections 143B form a housing space S4' for receiving the magnetic core column 112B. In the inner coil 14A and the inner coil 14B, the adjacent lower connecting leg sections 143A and 143B are connected to each other (see figure 1). Fig. 9).

[0021] The second magnetic core 12 is removable and arranged between the first magnetic core 11A and the first magnetic core 11B, and is located above the lower connecting leg section 143A and the lower connecting leg section 143B.

[0022] The cover body 111A and the cover body 111B are joined together in the horizontal direction D1.

[0023] As in Fig. 7 and Fig. As shown in Figure 8, the first side column 131A comprises a column body 1311A and a connecting leg 1312A, the connecting leg 1312A being located at the lower end of the column body 1311A, extending to the outside of the column body 1311A, and projecting from the cover body 111A. The first side column 131B comprises a column body 1311B and a connecting leg 1312B, the connecting leg 1312B being located at the lower end of the column body 1311B, extending to the outside of the column body 1311B, and projecting from the cover body 111B. The connecting legs 1312A are each located between two adjacent base bodies 1432 (as described below) and are associated with the two adjacent base bodies 1432. The connecting legs 1312B are located between two adjacent base bodies 1432 (as described below) and are assigned to the two adjacent base bodies 1432.

[0024] As in Fig. 9 and Fig.As shown in Figure 10, each lower connecting leg section 143A, 143B comprises a base body 1431 and a base body 1432, wherein the base body 1431 is connected to the base body 1432. In the example of the lower connecting leg sections 143A, the two base bodies 1432 are arranged opposite each other and are each located outside one of the second side columns 141A. The base body 1431 has a side edge 1431a and a beveled edge 1431b, wherein the side edge 1431a is connected to the second side column 141, while a slot G is provided between two adjacent beveled edges 1431b. In this embodiment, the two base bodies 1432, when connected to each other, are defined as a common base body 1430, which is formed in one piece or consists of two separate, removable base bodies 1432. It should be noted that the dimensions of the two outer base bodies 1432 may be identical or not identical.In some embodiments, the dimensions of the common base body 1430 also differ from those of the outer base bodies 1432; for example, they may be larger or smaller than those of the outer base bodies 1432. The structural design of the common base body 1430 not only improves the mechanical stability and the reliability of the electrical conductivity between the inner coils 14, but also effectively shortens the current path and reduces the contact resistance, thereby reducing the DC resistance (DCR) and increasing the overall efficiency and power density of the module. [Advantageous effects of the exemplary embodiments]

[0025] An advantageous effect of the present invention is that, according to some embodiments, the coupled magnetic element with high power density and low DC resistance according to the present invention offers the technical effect of high dielectric strength, low losses and high power density.

[0026] Furthermore, according to some embodiments, the coupled magnetic element with high power density and low DC resistance of the present invention achieves a high coupling coefficient between the two inductors through an optimized magnetic circuit design. This enables mutual interaction between the inductors, which contributes to increasing energy conversion efficiency. Simultaneously, several air gaps are provided between the first and second magnetic cores, which not only effectively improve the dielectric strength but also allow for adjustment of the magnetic flux distribution and inductance values ​​as required. In addition, the present utility model, through its special coil winding method and the structural design of the common base body, effectively shortens the current path and reduces conductor losses, thereby achieving an extremely low DC resistance (DCR).Through the comprehensive design described above, the present invention can overcome the technical limitations of existing magnetic elements with high dielectric strength, low loss and high power density on the market, while also achieving the advantage of reduced DC resistance, which helps to reduce the volume of electronic devices and meet the requirements for high efficiency and miniaturization.

[0027] In other words, the first magnetic core, the outer coil, and the second magnetic core form the first inductor, while the first magnetic core, the inner coil, and the second magnetic core form the second inductor, with the inductance value between the two inductors being adjusted across the air gap to meet the requirements of the respective circuit. According to some embodiments, the coupled magnetic element of the present invention enables the one-piece integration of two inductor elements. This not only effectively reduces the number and space required for elements in a printed circuit board assembly (PCBA), but also shortens the current path, lowers the contact resistance, and reduces the overall DC resistance.On the other hand, the present invention also maximizes space utilization and power density, enables miniaturization of the product and high efficiency, and thus effectively solves the challenges faced by the state of the art.

[0028] Since the coupled magnetic module with high power density and low DC resistance is constructed similarly to the coupled magnetic element with high power density and low DC resistance described above, it also has the technical advantages of the coupled magnetic element with high power density and low DC resistance described above. Reference symbol list Z-coupled magnetic module with high power density and low DC resistance 1A, 1B Coupled magnetic element with high power density and low DC resistance 11, 11A, 11B First magnetic core 111, 111A, 111B Cover body 1111, 1111A, 1111B First side wall 1112, 1112A, 1112B First connecting wall 112, 112A, 112B magnetic core column 12 Second magnetic core 121, 121A, 121B Second side wall 122, 122A, 122B Second connecting wall 123 Magnetic core column 13, 13A, 13B Outer coil 131, 131A, 131B First side column 1311, 1311A, 1311B Column bodies 1312, 1312A, 1312B Connection leg 132, 132A, 132B First connecting section 140 inner coil group 14, 14A, 14B Inner coil 141, 141A, 141B Second side column 142, 142A, 142B Second connecting section 143, 143A, 143B Lower connecting leg section 1430 Common Base Body 1431 Basic body 1431a Side edge 1431b Slanted edge 1432 Base bodies D1 Horizontal direction G slot S Chamber S1, S1' First admission chamber S2 Second Admission Chamber S3, S3' Recording room S4, S4' Accommodation room

Claims

[1] Coupled magnetic element with high power density and low DC resistance (1A), comprising: - a first magnetic core (11) comprising a cover body (111) and a magnetic core column (112), the cover body (111) comprising two first side walls (1111) and a first connecting wall (1112), each of the first side walls (1111) forming a first receiving chamber (S1) with the first connecting wall (1112), while the magnetic core column (112) is connected to the first connecting wall (1112) and is located inside the first receiving chamber (S1); - an outer coil (13) which is removably arranged within the first receiving chamber (S1) and comprises two first side columns (131) and a first connecting section (132), wherein the first connecting section (132) is connected at both ends to the upper end of one of the first side columns (131) and forms a receiving space (S3) with each of the first side columns (131); - an inner coil (14) which is removably arranged within the receiving space (S3) and comprises two second side columns (141), a second connecting section (142) and two lower connecting leg sections (143), wherein the two ends of the second connecting section (142) are each connected to the upper end of one of the second side columns (141), while the lower end of each of the second side columns (141) is connected to one of the lower connecting leg sections (143), wherein the second side columns (141), the second connecting section (142) and each of the lower connecting leg sections (143) form a receiving space (S4) for receiving the magnetic core column (112); and - a second magnetic core (12) which is detachably connected in a horizontal direction (D1) to the first magnetic core (11) to create a chamber (S) in which the outer coil (13), the inner coil (14) and the magnetic core column (112) are located. [2] Coupled magnetic element with high power density and low DC resistance (1A) according to claim 1, wherein the second magnetic core (12) comprises two second side walls (121), a second connecting wall (122) and a further magnetic core column (112), wherein the second side walls (121) and the second connecting wall (122) form a second receiving chamber (S2) in which the further magnetic core column (123) is located, wherein each of the second side walls (121) is detachably connected to one of the first side walls (1111). [3] Coupled magnetic element with high power density and low DC resistance (1A) according to claim 1 or 2, wherein each of the first side columns (131) comprises a column body (1311) and a connecting leg (1312), the connecting leg (1312) being arranged at the lower end of the column body (1311), extending to the outside of the column body (1311) and protruding from the first magnetic core (11). [4] Coupled magnetic element with high power density and low DC resistance (1A) according to any one of claims 1 to 3, wherein each of the lower connecting leg sections (143) comprises a base body (1431) and a base body (1432), the base body (1431) being connected to the base body (1432), each of the base bodies (1432) being arranged opposite each other and being located outside one of the second side columns (141), and wherein each of the base bodies (1431) has a side edge (1431a) and a slanted edge (1431b), each of the side edges (1431a) being connected to one of the second side columns (141), while a slot (G) is provided between the two slanted edges (1431b). [5] Coupled magnetic element with high power density and low DC resistance (1A) according to claim 4, wherein the base body (1431) is essentially in the shape of a right-angled triangle, the three sides of which consist of the oblique edge (1431b), the side edge (1431a) and a base edge, the base edge being connected to the base body (1432). [6] Coupled high power density, low DC resistance (Z) magnetic module comprising: - two first magnetic cores (11A, 11B) opposite each other, each of which has a cover body (111A, 111B) and a magnetic core column (112A, 112B), the cover body (111A, 111B) having two first side walls (1111A, 1111B) and a first connecting wall (1112A, 1112B), each of the first side walls (1111A, 1111B) forming a first receiving chamber (S1, S1') with the first connecting wall (1112A, 1112B), while the magnetic core column (112A, 112B) is connected to the first connecting wall (1112A, 1112B) and is located inside the first receiving chamber (S1, S1'); - two outer coils (13A, 13B), each of which is removable within one of the first receiving chambers (S1, S1') and comprises two first side columns (131A, 131B) and a first connecting section (132A, 132B), the first connecting section (132A, 132B) being connected at both ends to the upper end of one of the first side columns (131A, 131B) and forming a receiving chamber (S3, S3') with each of the first side columns (131A, 131B); - an inner coil assembly (140) comprising two inner coils (14A, 14B), each of which is removably arranged within one of the receiving spaces (S3, S3') and comprising two second side columns (141A, 141B), a second connecting section (142A, 142B) and two lower connecting leg sections (143A, 143B), wherein the two ends of the second connecting section (142A, 142B) are each connected to the upper end of one of the second side columns (141A, 141B), while the lower end of each of the second side columns (141A, 141B) is connected to one of the lower connecting leg sections (143A, 143B), wherein the second side columns (141A, 141B), the second connecting section (142A, 142B) and each of the lower connecting leg sections (143A, 143B) form a housing space (S4, S4') wherein each of the housing spaces (S4, S4') contains one of the magnetic core columns (112A, 112B), wherein each of the inner coils (14A,14B) two adjacent lower connecting leg sections (143A, 143B) are connected to each other; and, - a second magnetic core (12) which is removably arranged between two adjacent magnetic core columns (112A, 112B) and is located above the several lower connecting leg sections (143A, 143B); wherein each of the cover bodies (111A, 111B) is joined together in a horizontal direction (D1). [7] Coupled high power density low DC resistance (Z) magnetic module according to claim 6, wherein each of the first side columns (131A, 131B) comprises a column body (1311A, 1311B) and a connecting leg (1312A, 1312B), the connecting leg (1312A, 1312B) being arranged at the lower end of the column body (1311A, 1311B), extending to the outside of the column body (1311A, 1311B) and protruding from the cover body (111A, 111B). [8] Coupled high power density, low DC resistance (Z) magnet module according to claim 6 or 7, wherein each of the lower connecting leg sections (143A, 143B) comprises a base body (1431) and a base body (1432), the base body (1431) being connected to the base body (1432), each of the base bodies (1432) being arranged opposite each other and being located outside one of the second side columns (141A, 141B), and wherein each of the base bodies (1431) has a side edge (1431a) and a slanted edge (1431b), each of the side edges (1431a) being connected to one of the second side columns (141A, 141B), while a slot (G) is provided between two adjacent slanted edges (1431b). [9] Coupled high power density, low DC resistance (Z) magnet module according to claim 8, wherein each of the first side columns (131A, 131B) comprises a column body (1311A, 1311B) and a connecting leg (1312A, 1312B), the connecting leg (1312A, 1312B) being located at the lower end of the column body (1311A, 1311B), extending to the outside of the column body (1311A, 1311B) and protruding from the cover body (111), and wherein each of the connecting legs (1312A, 1312B) is located between two adjacent base bodies (1432) and is associated with the two adjacent base bodies (1432). [10] Coupled high power density and low DC resistance (Z) magnet module according to claim 8 or 9, wherein each of the base bodies (1431) is substantially in the shape of a right-angled triangle, the three sides of which consist of the oblique edge (1431b), the side edge (1431a) and a base edge, the base edge being connected to the base body (1432).

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