Magnetic element and integrated magnetic assembly

Abstract

The present disclosure relates to a magnetic element and integrated magnetic assembly. The magnetic element includes a magnetic core set, a primary winding, a first secondary winding, a second secondary winding and a tertiary winding. The magnetic core set includes a center leg, a first side leg and a second side leg. The first side leg includes a first pin and a second pin. The second side leg includes a third pin and a fourth pin. A first section of the tertiary winding is wound on one of the first pin and the second pin, and a second section of the tertiary winding is wound on one of the third pin and the fourth pin. The two side legs are divided into two pins respectively, and partial coupling is achieved by the tertiary winding. Therefore, adjustable and enhanced coupling coefficient, reduced loss, saved space and improved performance and other advantages can be achieved.

Description

Technical Field

[0001] This disclosure relates to a magnetic element, and more particularly to a magnetic element with low loss and high performance. This disclosure also relates to an integrated magnetic assembly using this magnetic element. Background Technology

[0002] A current-doubler rectifier (CDR) is a power rectifier topology used in DC-DC converters. Its transformer secondary winding is center-tapped, and it uses two switches and an inductor to rectify alternating current (AC) into direct current (DC). Compared to traditional rectifiers, the CDR topology effectively doubles the output current while reducing transformer losses and improving efficiency, making it ideal for high-current, low-voltage applications.

[0003] Typically, a CDR topology employs multiple magnetic components, such as transformers and inductors. Transformers are used for isolation and voltage reduction. In traditional implementations, transformers and inductors are separate components, resulting in a bulky structure and reduced efficiency. However, integrated designs, such as combining inductors together, or in some cases integrating transformers and inductors, can significantly improve performance.

[0004] The study also shows that coupled magnetic elements can help improve the dynamic performance of DC-DC converters. Coupled magnetic elements can achieve lower current ripple and faster transient response. However, traditional coupled magnetic elements require complex winding paths, resulting in longer wire lengths, higher losses, and larger space requirements. Furthermore, the coupling coefficient is difficult to adjust and improve during the design of magnetic elements.

[0005] Therefore, it is necessary to provide a magnetic element and an integrated magnetic assembly to solve the problems faced by the prior art. Summary of the Invention

[0006] This disclosure discloses a magnetic element and an integrated magnetic assembly. This magnetic element addresses problems existing in the prior art and achieves advantages such as adjustable and / or enhanced coupling coefficients, reduced winding and core losses, smaller size, and improved performance. Furthermore, the magnetic element and integrated magnetic assembly disclosed herein are suitable for CDR topologies in DC-DC converters or multiphase buck converters. In some embodiments, the magnetic element is a fractional-winding planar transformer. The turns ratio of this magnetic element can be adjusted according to actual needs. Using a fractional-winding structure in the magnetic element achieves lower leakage inductance, lower winding and core losses, and improved power density and efficiency.

[0007] According to a concept disclosed herein, a magnetic element is provided. The magnetic element includes a core assembly, a primary winding, a first secondary winding, a second secondary winding, and a tertiary winding. The core assembly includes a center post, a first side post, and a second side post. A first winding channel is formed between the center post and the first side post. A second winding channel is formed between the center post and the second side post. The first side post includes a first pin, a second pin, and a first sub-winding channel. The first sub-winding channel is disposed between the first pin and the second pin. The second side post includes a third pin, a fourth pin, and a second sub-winding channel, which is disposed between the third pin and the fourth pin. A plurality of portions of the primary winding are wound through the first winding channel and the second winding channel. A portion of the first secondary winding is wound through the first winding channel. A portion of the second secondary winding is wound through the second winding channel and is connected to the first secondary winding. The tertiary winding includes a first section and a second section. The first section is wound around one of the first and second pins. The second section is wound around one of the third and fourth pins.

[0008] According to another concept of this disclosure, a magnetic element is provided. The magnetic element includes a core assembly, a primary winding, a first secondary winding, a second secondary winding, and a tertiary winding. The core assembly includes a center post, a first side post, and a second side post. A first winding channel is formed between the center post and the first side post. A second winding channel is formed between the center post and the second side post. A plurality of portions of the primary winding are wound through the first winding channel and the second winding channel. A portion of the first secondary winding is wound through the first winding channel. A portion of the second secondary winding is wound through the second winding channel, and the second secondary winding is connected to the first secondary winding. The tertiary winding is wound on the center post or on the first and second side posts.

[0009] In one embodiment, the magnetic core assembly further includes a first plate and a second plate, wherein the central post, the first side post and the second side post are respectively connected between the first plate and the second plate, and the central post is disposed between the first side post and the second side post.

[0010] In one embodiment, the magnetic component further includes an auxiliary inductor configured to adjust a coupling coefficient of the magnetic component. The auxiliary inductor is a trace inductor electrically connected to the tertiary winding. Alternatively, the auxiliary inductor includes an inductor core having a channel through which a portion of the tertiary winding is wound through the channel of the inductor core. Or, the auxiliary inductor is a discrete inductor including an inductor core and an inductor winding. The inductor core includes an EE core, an EI core, or a PQ core. The inductor winding is electrically connected to the tertiary winding and is wound in one or more turns on a post of the inductor core.

[0011] In one embodiment, the primary winding is wound on the central post, or wound on the first side post and the second side post, wherein the first primary winding is wound on the first side post and the second primary winding is wound on the second side post.

[0012] In one embodiment, the three-stage winding includes a first section and a second section. The first section is wound on the first side post, and the second section is wound on the second side post. The current flowing through the first section of the three-stage winding flows in a first direction, and the current flowing through the second section of the three-stage winding flows in a second direction. The first direction and the second direction are opposite to each other.

[0013] In one embodiment, the primary winding is wound on the central post, the first secondary winding is wound on the first side post, the second secondary winding is wound on the second side post, a first section of the tertiary winding is wound on the first side post, and a second section of the tertiary winding is wound on the second side post.

[0014] In one embodiment, the primary winding is wound on the central post, the first secondary winding is wound on the first side post, the second secondary winding is wound on the second side post, and the tertiary winding is wound on the central post.

[0015] In one embodiment, the magnetic component further includes at least one printed circuit board, wherein at least one of the primary winding, the first secondary winding, the second secondary winding, and the third tertiary winding is disposed in the at least one printed circuit board.

[0016] In one embodiment, the primary winding, the first secondary winding, the second secondary winding, and the third secondary winding are each a conductive sheet.

[0017] In one embodiment, the magnetic component is a planar transformer based on a printed circuit board.

[0018] According to another concept of this disclosure, an integrated magnetic assembly is provided. The integrated magnetic assembly includes at least two magnetic elements. Each magnetic element includes the structure described above. A first side post of one of the at least two magnetic elements is connected to a second side post of an adjacent magnetic element to form a common post. The three-stage windings of the at least two magnetic elements are connected in series.

[0019] According to another aspect of this disclosure, a magnetic element is provided. The magnetic element includes a core assembly, a primary winding, a first secondary winding, and a second secondary winding. The core assembly includes a center post, a first side post, and a second side post. A first winding channel is formed between the center post and the first side post. A second winding channel is formed between the center post and the second side post. The first side post includes a first pin, a second pin, and a first sub-winding channel. The first sub-winding channel is disposed between the first pin and the second pin. The second side post includes a third pin, a fourth pin, and a second sub-winding channel, which is disposed between the third pin and the fourth pin. The primary winding is wound on the center post and on one of the first pin and the second pin, and also on one of the third pin and the fourth pin. A portion of the first secondary winding is wound through the first winding channel. A portion of the second secondary winding is wound through the second winding channel, and the second secondary winding is connected to the first secondary winding.

[0020] According to another concept of this disclosure, a magnetic component is provided. The magnetic component includes a magnetic core assembly, a first inductor winding, a second inductor winding, and a three-stage winding. The magnetic core assembly includes a center post, a first side post, and a second side post. A first winding channel is formed between the center post and the first side post. A second winding channel is formed between the center post and the second side post. The first side post includes a first pin, a second pin, and a first sub-winding channel. The first sub-winding channel is disposed between the first pin and the second pin. The second side post includes a third pin, a fourth pin, and a second sub-winding channel, which is disposed between the third pin and the fourth pin. A portion of the first inductor winding is wound through ground in the first winding channel. A portion of the second inductor winding is wound through ground in the second winding channel, and the second inductor winding is connected to the first inductor winding. The three-stage winding includes a first section and a second section. The first section is wound around one of the first and second pins, and the second section is wound around one of the third and fourth pins.

[0021] The above-described embodiments and other embodiments will be further described and explained in the embodiments described below. Attached Figure Description

[0022] Figure 1A This is a cross-sectional schematic diagram showing the magnetic element of the first embodiment of this disclosure.

[0023] Figure 1B This is a circuit diagram showing a user Figure 1A The shown magnetic element is a DC-DC converter with a current multiplier rectifier.

[0024] Figure 1C This is a 3D schematic diagram, showing Figure 1A The magnetic core assembly of the magnetic element shown.

[0025] Figure 1D This is a schematic diagram showing... Figure 1A The direction of the current flowing through the winding in the magnetic element shown.

[0026] Figure 1E This is a circuit diagram showing... Figure 1A The diagram shows the partial coupling effect between the inductances generated by the windings in the magnetic element.

[0027] Figure 1F This is a schematic diagram showing that after partial coupling is implemented, Figure 1A The magnetic reluctance model of the magnetic element shown is illustrated.

[0028] Figure 1G This is a schematic diagram showing a coupling to Figure 1A The auxiliary inductance of the three-stage winding of the magnetic element shown.

[0029] Figure 2A This is a three-dimensional schematic diagram showing the magnetic element of the second embodiment of this disclosure.

[0030] Figure 2B This is a three-dimensional schematic diagram showing the magnetic element of the third embodiment of this disclosure.

[0031] Figure 2C This is a three-dimensional schematic diagram showing the magnetic element of the fourth embodiment of this disclosure.

[0032] Figure 2D This is a three-dimensional schematic diagram showing the magnetic element of the fifth embodiment of this disclosure.

[0033] Figure 3 This is a three-dimensional schematic diagram showing the magnetic element of the sixth embodiment of this disclosure.

[0034] Figure 4A This is a three-dimensional schematic diagram showing the magnetic element of the seventh embodiment of this disclosure.

[0035] Figure 4B This is a three-dimensional schematic diagram showing the magnetic element of the eighth embodiment of this disclosure.

[0036] Figure 5A This is a circuit diagram showing a power converter comprising multiple modules connected in parallel, wherein a three-stage winding with an integrated magnetic component connects all the modules.

[0037] Figure 5B This is a three-dimensional schematic diagram showing the integrated magnetic component of the first embodiment of this disclosure.

[0038] Figure 5C This is a three-dimensional schematic diagram showing the integrated magnetic component of the second embodiment of this disclosure.

[0039] Figure 6AThis is a three-dimensional schematic diagram showing the magnetic element of the ninth embodiment of this disclosure.

[0040] Figure 6B This is a schematic diagram showing... Figure 6A The direction of the current flowing through the winding and the distribution of magnetic flux in the magnetic element shown.

[0041] Figure 6C This is a three-dimensional schematic diagram showing the integrated magnetic component according to a third embodiment of the present disclosure.

[0042] Figure 7A This is a three-dimensional schematic diagram showing the magnetic element of the tenth embodiment of this disclosure.

[0043] Figure 7B This is a schematic diagram showing... Figure 7A The direction of the current flowing through the winding and the distribution of magnetic flux in the magnetic element shown.

[0044] Figure 7C This is a three-dimensional schematic diagram showing the magnetic element of the eleventh embodiment of this disclosure.

[0045] Figure 7D This is a schematic diagram showing... Figure 7C The direction of the current flowing through the winding and the distribution of magnetic flux in the magnetic element shown.

[0046] Figure 7E This is a three-dimensional schematic diagram showing the magnetic element of the twelfth embodiment of the present disclosure.

[0047] Figure 7F This is a schematic diagram showing... Figure 7E The direction of the current flowing through the winding and the distribution of magnetic flux in the magnetic element shown.

[0048] Figure 8 This is a three-dimensional schematic diagram showing the integrated magnetic component according to the fourth embodiment of the present disclosure.

[0049] Figure 9A , 9B 9C and Figure 10 The magnetic components of the coupling inductors used in a two-phase buck converter are shown.

[0050] Figure 11A This is a three-dimensional schematic diagram showing the magnetic element of the thirteenth embodiment of the present disclosure.

[0051] Figure 11B This is a cross-sectional schematic diagram, showing Figure 11A The detailed structure of the magnetic element shown.

[0052] Figure 11C This is a three-dimensional schematic diagram showing the magnetic element of the fourteenth embodiment of the present disclosure.

[0053] Figure 12A This is a three-dimensional schematic diagram showing the magnetic element of the fifteenth embodiment of this disclosure.

[0054] Figure 12B This is a three-dimensional schematic diagram showing the magnetic element of the sixteenth embodiment of the present disclosure.

[0055] List of reference numerals in the attached diagram: 1, 1a, 1b, 1c, 1d, 1e, 1f, 1g, 1h, 1i, 1j, 1k, 9, 10, 10a, 10b, 10c, 81, 9a, 9b, 9c: Magnetic components 100: DC-DC converter 101: Primary Circuit 102: Secondary circuit 2: Magnetic core assembly 200: Power Converter 20: Module 201: First side 202: Second side 203: Third side 204: Fourth side 21: Central Column 22: First side pillar 221: First foot connection 222: Second foot 223: First sub-winding channel 23: Second side post 231: Third pin 232: Fourth pin 233: Second sub-winding channel 24: First Slab 25: Second plate 26: First winding channel 27: Second winding channel 3: Primary winding 31, 61: First section 32, 62: Second section 33: Third Section 4: First stage winding 5: Secondary winding 6: Three-stage winding 7: Inductor core 71: Passage 8, 8a, 8b, 8c: Integrated magnetic components 82: Common Column A1: First cross-sectional area A2: Second cross-sectional area A3: Third cross-sectional area A4: Fourth cross-sectional area D1: First Direction D2: Second Direction I c i L1 i L2 i p i sec1 i sec2 Current Lc: Auxiliary inductor Q1: Switch on Q2: Down switch Rleg1, Rleg2, Rbase: Impedance SR1, SR2, SR3, SR4: Switches TR: Transformer Vin: Input voltage Vo: Output voltage Detailed Implementation

[0056] The present disclosure will be described in more detail below with reference to the following embodiments. It should be noted that the following description of preferred embodiments of the present disclosure is for illustrative and descriptive purposes only and is not intended to exhaustively describe all embodiments or limit the specific forms disclosed. For example, the formation of a first feature on or above a second feature in the following description may include embodiments where the first and second features are in direct contact, or embodiments where an additional feature is formed between the first and second features, such that the first and second features are not in direct contact. Furthermore, reference numerals and / or letters may be repeated in various examples in the present disclosure. This repetition is for brevity and does not, in itself, determine the relationship between the various embodiments and / or configurations discussed. In addition, for ease of description, spatial relative terms such as "upper," "lower," "front," "back," "top," and "bottom" are used herein to describe the relationship between elements or features shown in the figures and other elements or features. These spatial relative terms are intended to cover different orientations of the device other than those shown in the figures during use or operation. The device may adopt other orientations (e.g., rotated 90 degrees or other orientations), and the spatial relative descriptive terms used herein may be interpreted accordingly. When referring to an element being "connected" or "coupled" to another element, it can mean a direct connection or coupling to the other element, or it can mean the presence of an intermediate element. Although the numerical ranges and parameters in this disclosure are approximate, the values ​​in the specific examples have been listed as precisely as possible. Furthermore, while terms such as "first," "second," etc., in the claims may be used to describe individual elements, these elements should not be limited by these terms. The elements described in the various embodiments are used to denote different reference numerals, and these terms are used only to distinguish different elements. For example, a first element may be referred to as a second element, and similarly, a second element may be referred to as a first element, without departing from the scope of the exemplary embodiments. Additionally, "and / or," etc., may be used herein to encompass any or all combinations of one or more of the associated listed items.

[0057] Figure 1A This is a cross-sectional schematic diagram showing the magnetic element of the first embodiment of this disclosure. Figure 1B This is a circuit diagram showing a user Figure 1A The shown magnetic element is a DC-DC converter with a current multiplier rectifier. Figure 1C This is a 3D schematic diagram, showing Figure 1A The magnetic core assembly of the magnetic element shown. Figure 1D This is a schematic diagram showing... Figure 1A The direction of the current flowing through the winding in the magnetic element shown. Figure 1A , 1BAs shown in 1C and 1D, the magnetic element 1 of this disclosure is applicable to a DC-DC converter 100 with a current doubler rectifier (CDR) or a multiphase buck converter with a current doubler rectifier. The DC-DC converter 100 includes a primary circuit 101, a transformer TR, and a secondary circuit 102. The primary circuit 101 receives an input voltage Vin and includes at least one switching arm. The switching arm includes an upper switch Q1 and a lower switch Q2 connected in series. The transformer TR includes a primary winding 3 and two secondary windings (i.e., a primary winding 4 and a secondary winding 5). The primary winding 3 of the transformer TR is electrically connected to the switching arm. The secondary circuit 102 outputs an output voltage Vo and includes two switches SR1 and SR2. The two secondary windings 4 and 5 of the transformer TR are respectively connected to the two switches SR1 and SR2. The two secondary windings 4 and 5 of the transformer TR and the two switches SR1 and SR2 are configured as a current doubler rectifier. It should be noted that the topology of the CDR is not limited to the above embodiments and can be varied according to actual needs.

[0058] In this embodiment, the magnetic element 1 includes the aforementioned transformer TR. The magnetic element 1 includes a core assembly 2, a primary winding 3, a first secondary winding 4, a second secondary winding 5, and a tertiary winding 6. The core assembly 2 includes a center post 21, a first side post 22, and a second side post 23. A first winding channel 26 is formed between the center post 21 and the first side post 22. A second winding channel 27 is formed between the center post 21 and the second side post 23. The first side post 22 includes a first pin 221, a second pin 222, and a first sub-winding channel 223, which is disposed between the first pin 221 and the second pin 222. The second side post 23 includes a third pin 231, a fourth pin 232, and a second sub-winding channel 233, which is disposed between the third pin 231 and the fourth pin 232. In other words, the first side post 22 and the second side post 23 are each divided into two pins by a sub-winding channel. Multiple portions of the primary winding 3 are wound through the ground in the first winding channel 26 and the second winding channel 27. A portion of the first primary winding 4 is wound through the ground in the first winding channel 26.

[0059] The second-stage winding 5 is partially wound through the second winding channel 27, and is connected to the first-stage winding 4. The third-stage winding 6 is structured to adjust the coupling coefficient of the magnetic element 1, and includes a first section 61 and a second section 62. The first section 61 is wound on one of the first pin 221 and the second pin 222, and the second section 62 is wound on one of the third pin 231 and the fourth pin 232. Since the two side posts 22 and 23 of the core assembly 2 are each divided into two pins and partially coupled through the third-stage winding 6, the coupling coefficient of the magnetic element 1 can be adjusted and / or enhanced.

[0060] In some embodiments, the primary winding 3 is wound on the center post 21, or on the first side post 22 and the second side post 23, or on one of the first terminal 221 and the second terminal 222, and one of the third terminal 231 and the fourth terminal 232. The first primary winding 4 is wound on the center post 21 or the first side post 22. The second primary winding 5 is wound on the center post 21 or the second side post 23.

[0061] In some embodiments, the magnetic element 1 further includes an auxiliary inductor Lc, which is configured to adjust the coupling coefficient of the magnetic element 1. The auxiliary inductor Lc is a trace inductor or a discrete inductor. In one embodiment, the auxiliary inductor Lc is an additional winding electrically connected to the tertiary winding 6 to form a trace inductor (see...). Figure 1D In another embodiment, such as Figure 1G As shown, the auxiliary inductor Lc is a discrete inductor and includes an inductor core 7, which includes a channel 71 passing through it. A portion of the tertiary winding 6 is wound through the channel 71 of the inductor core 7. In some embodiments, the auxiliary inductor Lc is a discrete inductor and includes an inductor core and an inductor winding. Preferably, but not limited to, the inductor core includes an EE core, an EI core, or a PQ core. The inductor winding is electrically connected to the tertiary winding 6 and is wound one or more turns on a post of the inductor core. It should be noted that the structure of the auxiliary inductor Lc is not limited to the above embodiments and can be varied according to actual needs.

[0062] In some embodiments, the magnetic core assembly 2 includes a first plate 24 and a second plate 25. A center post 21, a first side post 22, and a second side post 23 are respectively connected between the first plate 24 and the second plate 25. The center post 21 is disposed between the first side post 22 and the second side post 23. The magnetic core assembly 2 includes a first side 201, a second side 202, a third side 203, and a fourth side 204. The first side 201 and the second side 202 are opposite to each other. The third side 203 and the fourth side 204 are opposite to each other. The third side 203 and the fourth side 204 are preferably, but not limited to, parallel to the extending directions of the first winding channel 26 and the second winding channel 27. The first sub-winding channel 223 and the second sub-winding channel 233 are adjacent to and parallel to the third side 203 and the fourth side 204, respectively.

[0063] Alternatively, the first sub-winding channel 223 and the second sub-winding channel 233 are perpendicular to the third side 203 and the fourth side 204, respectively. In one embodiment, the core assembly 2 includes a first core component and a second core component. The first core component and the second core component are preferably, but not limited to, EE cores or EI cores. In one embodiment, the center post 21, the first side post 22, the second side post 23, and the first plate 24 are integrally formed and serve as the first core component, and the second plate 25 serves as the second core component. Alternatively, the center post 21, the first side post 22, the second side post 23, and the second plate 25 are integrally formed and serve as the first core component, and the first plate 24 serves as the second core component. It should be noted that the structure of the core assembly 2 is not limited to the above embodiments and can be varied according to actual needs.

[0064] like Figure 1A , Figure 1B , Figure 1C and Figure 1D As shown, in this embodiment, the primary winding 3 is wound on the center post 21, and multiple portions of the primary winding 3 are wound through the first winding channel 26 and the second winding channel 27. A portion of the first primary winding 4 is wound through the first winding channel 26. A portion of the second primary winding 5 is wound through the second winding channel 27. The first primary winding 4 and the second primary winding 5 are connected to each other. The first segment 61 of the tertiary winding 6 is wound on the first pin 221, and multiple portions of the first segment 61 are wound through the first sub-winding channel 223 and the first winding channel 26. The second segment 62 of the tertiary winding 6 is wound on the third pin 231, and multiple portions of the second segment 62 are wound through the second sub-winding channel 233 and the second winding channel 27. The first segment 61 and the second segment 62 are connected in series. In one embodiment, the primary winding 3 is wound around the central post 21 with at least two turns, and the first primary winding 4 and the second primary winding 5 each contain one or more turns.

[0065] In some embodiments, a portion of the primary winding 4 is wound through the first winding channel 26, and the primary winding 4 is connected to the secondary winding 5. In other embodiments, the primary winding 4 is wound with at least one turn on the first side post 22, and the primary winding 4 is connected to the secondary winding 5. Similarly, the winding method of the primary winding 4 described above also applies to the secondary winding 5. The tertiary winding 6 includes at least one turn. It should be noted that the number of turns of the primary winding 3, the primary winding 4, the secondary winding 5, and the tertiary winding 6, and their interleaving structure, are not limited to the following. Figure 1A and Figure 1D The architecture shown can be arranged in a way that allows the windings to be interleaved according to the actual number of turns required.

[0066] In one embodiment, the current flowing through the first segment 61 of the three-stage winding 6 flows in a first direction D1, and the current flowing through the second segment 62 of the three-stage winding 6 flows in a second direction D2. The first direction D1 and the second direction D2 are opposite to each other. For example, if the current flowing through the first segment 61 of the three-stage winding 6 at the first pin 221 flows clockwise, then the current flowing through the second segment 62 of the three-stage winding 6 at the third pin 231 flows counterclockwise, and vice versa.

[0067] In some embodiments, the magnetic element 1 is a planar transformer based on a printed circuit board, but is not limited thereto. The magnetic element 1 includes at least one printed circuit board (not shown). At least one of the primary winding 3, the first secondary winding 4, the second secondary winding 5, and the tertiary winding 6 is disposed in at least one printed circuit board. The printed circuit board has a single-layer structure or a multi-layer structure. Therefore, a PCB-based planar magnetic element employing PCB windings is provided. In some embodiments, the primary winding 3, the first secondary winding 4, the second secondary winding 5, and the tertiary winding 6 are each a conductive sheet. In some embodiments, the first pin 221 includes a first cross-sectional area A1 in a direction parallel to the first plate 24, and the second pin 222 includes a second cross-sectional area A2 in a direction parallel to the first plate 24. The first cross-sectional area A1 is preferably, but not limited to, equal to the second cross-sectional area A2. The third pin 231 includes a third cross-sectional area A3 in a direction parallel to the first plate 24, and the fourth pin 232 includes a fourth cross-sectional area A4 in a direction parallel to the first plate 24. The third cross-sectional area A3 is preferably, but not limited to, equal to the fourth cross-sectional area A4.

[0068] Figure 1E This is a circuit diagram showing... Figure 1A The diagram shows the partial coupling effect between the inductances generated by the windings in the magnetic element. Figure 1E The diagram shows the primary winding, the first secondary winding, multiple branches of the second secondary winding, and the branch of the tertiary winding. The primary winding 3 and the two secondary windings 4 and 5 are tightly coupled, while the two secondary windings 4 and 5 are also coupled to the tertiary winding 6. The coupling coefficient is determined based on the magnetic reluctance and the proportion of the tertiary winding 6 in the cross-sectional area of ​​the magnetic core surrounding the first side post 22 and the second side post 23. Figure 1F This is a schematic diagram showing that after partial coupling is implemented, Figure 1A The magnetic reluctance model of the magnetic element shown is illustrated. Figure 1F As shown, the pins 221, 222, 231, and 232 of the two side posts 22 and 23 are considered to be identical, and are based on the pin impedance R. leg1 R leg2 Indicates. R base This indicates the pin impedance of the first board 24 and the second board 25. Additionally, i pi represents the current flowing through the primary winding 3. L1 i represents the current flowing through the primary winding 4. L2 This represents the current flowing through the secondary winding 5, and i c This represents the current flowing through the third-stage winding 6. The magnetoresistance model shows how partial coupling affects the overall magnetic flux distribution and the coupling coefficient within magnetic element 1.

[0069] Figure 2A This is a three-dimensional schematic diagram showing a magnetic element according to a second embodiment of the present disclosure. In this embodiment, the structure, components, and functions of the magnetic element 1a are the same as those of the magnetic element 1a. Figures 1A to 1G The magnetic element 1 shown in the figure is similar. The same reference numerals represent the same elements and will not be described again here. In this embodiment, the magnetic element 1a includes a core assembly 2, a primary winding 3, a first-stage winding 4, a second-stage winding 5, and a tertiary winding 6. The primary winding 3 is wound with at least one turn on the center post 21 (i.e., multiple portions of the primary winding 3 are wound through the first winding channel 26 and the second winding channel 27). The first-stage winding 4 is wound with at least one turn on the first side post 22 (i.e., a portion of the first-stage winding 4 is wound through the first winding channel 26). The second-stage winding 5 is wound with at least one turn on the second side post 23 (i.e., a portion of the second-stage winding 5 is wound through the second winding channel 27). The second-stage winding 5 is connected to the first-stage winding 4. The tertiary winding 6 is structured to adjust the coupling coefficient of the magnetic element 1a and includes a first segment 61 and a second segment 62. The first section 61 is wound around the first terminal 221, and the second section 62 is wound around the third terminal 231. In other words, the first section 61 and the second section 62 of the three-stage winding 6 are arranged across the first terminal 221 and the third terminal 231 near the center post 21.

[0070] and Figure 1A Compared to the magnetic element 1 of the first embodiment shown, the magnetic element 1a of this embodiment further includes two switches SR1 and SR2 connected to the primary winding 4 and the secondary winding 5, respectively. Furthermore, the two secondary windings 4 and 5 are not limited to a single half-turn winding, but rather include multiple turns. Therefore, the losses resulting from a single half-turn winding are reduced through this structure. The two side posts 22 and 23 of the core assembly 2 are respectively divided into two terminals 221, 222, 231, and 232 to achieve partial coupling through the tertiary winding 6. This allows for adjustment and / or enhancement of the coupling coefficient of the magnetic element 1a.

[0071] Figure 2B This is a three-dimensional schematic diagram showing a magnetic element according to a third embodiment of the present disclosure. In this embodiment, the structure, components, and functions of the magnetic element 1b are the same as those of the magnetic element 1b. Figure 2AThe magnetic element 1a shown is similar. The same reference numerals represent the same elements and will not be described again here. In this embodiment, the magnetic element 1b includes a core assembly 2, a primary winding 3, a first-stage winding 4, a second-stage winding 5, and a tertiary winding 6. The primary winding 3 includes a first segment 31 and a second segment 32. The first segment 31 is wound on a first side post 22, and the second segment 32 is wound on a second side post 23. In other words, the primary winding 3 is divided into two segments 31 and 32 and wound across the side posts 22 and 23. The first-stage winding 4 is wound on the first side post 22. The second-stage winding 5 is wound on the second side post 23 and connected to the first-stage winding 4. The tertiary winding 6 is configured to adjust the coupling coefficient of the magnetic element 1b and includes a first segment 61 and a second segment 62. The first segment 61 is wound on a first pin 221, and the second segment 62 is wound on a third pin 231. The two side posts 21 and 22 of the magnetic core assembly 2 are respectively divided into two terminals 221, 222, 231, and 232 to achieve partial coupling through the three-stage winding 6 and the primary winding 3. In this way, the coupling coefficient of the magnetic element 1b can be adjusted and / or enhanced.

[0072] Figure 2C This is a three-dimensional schematic diagram showing a magnetic element according to a fourth embodiment of the present disclosure. In this embodiment, the structure, components, and functions of the magnetic element 1c are the same as those of the present disclosure. Figure 2A The magnetic element 1a shown is similar. The same reference numerals represent the same elements and will not be described again here. In this embodiment, the magnetic element 1c includes a core assembly 2, a primary winding 3, a first-stage winding 4, a second-stage winding 5, and a tertiary winding 6. The primary winding 3 is wound on the center post 21. The first-stage winding 4 is wound on the first side post 22. The second-stage winding 5 is wound on the second side post 23 and connected to the first-stage winding 4. The tertiary winding 6 is configured to adjust the coupling coefficient of the magnetic element 1c and includes a first segment 61 and a second segment 62. The first segment 61 is wound on the second pin 222, and the second segment 62 is wound on the fourth pin 232. In other words, the first segment 61 and the second segment 62 of the tertiary winding 6 span across the second pin 222 and the fourth pin 232, which are located away from the center post 21. The two side posts 22 and 23 of the magnetic core assembly 2 are respectively divided into two terminals 221, 222, 231, and 232 to achieve partial coupling through the three-stage winding 6. In this way, the coupling coefficient of the magnetic element 1c can be adjusted and / or enhanced.

[0073] Figure 2D This is a three-dimensional schematic diagram showing a magnetic element according to a fifth embodiment of the present disclosure. In this embodiment, the structure, components, and functions of the magnetic element 1d are the same as those of the present disclosure. Figure 2A The magnetic element 1a shown is similar. The same reference numerals represent the same elements, and will not be described further here. Figure 2ACompared to the first embodiment, the magnetic element 1a shown omits the auxiliary inductor. Therefore, the magnetic element 1d occupies less space and has lower losses.

[0074] Figure 3 This is a three-dimensional schematic diagram showing a magnetic element according to a sixth embodiment of the present disclosure. In this embodiment, the structure, components, and functions of the magnetic element 1e are the same as those of the present disclosure. Figure 2A The magnetic element 1a shown is similar. The same reference numerals represent the same elements and will not be described again here. In this embodiment, the magnetic element 1e includes a core assembly 2, a primary winding 3, a first-stage winding 4, a second-stage winding 5, and a tertiary winding 6. The first sub-winding channel 223 of the first side post 22 is connected to the first winding channel 26, and the second sub-winding channel 233 of the second side post 23 is connected to the second winding channel 27. Furthermore, the first sub-winding channel 223 and the second sub-winding channel 233 are perpendicular to the first winding channel 26 and the second winding channel 27. The primary winding 3 is wound on the center post 21. The first-stage winding 4 is wound on the first side post 22. The second-stage winding 5 is wound on the second side post 23 and connected to the first-stage winding 4. The tertiary winding 6 is structured to adjust the coupling coefficient of the magnetic element 1e and includes a first section 61 and a second section 62. The first section 61 is wound around the first pin 221, and the second section 62 is wound around the third pin 231. The two side posts 22 and 23 of the magnetic core assembly 2 are respectively divided into two pins 221, 222, 231, and 232 to achieve partial coupling through the three-stage winding 6. In this way, the coupling coefficient of the magnetic element 1b can be adjusted and / or enhanced.

[0075] It should be noted that the winding position and winding method of magnetic element 1e are not limited and can be varied according to actual needs. For example, magnetic element 1e can be used as follows: Figure 2B , 2C And the winding position and winding method shown in 2D.

[0076] Figure 4A This is a three-dimensional schematic diagram showing a magnetic element according to a seventh embodiment of the present disclosure. The structure, components, and functions of the magnetic element 1f are similar to those of the present disclosure. Figure 2AThe magnetic element 1a shown is similar. The same reference numerals represent the same elements and will not be described again here. In this embodiment, the magnetic element 1f includes a core assembly 2, a primary winding 3, a first-stage winding 4, a second-stage winding 5, and a tertiary winding 6. The primary winding 3 is wound with at least two turns on the center post 21. A portion of the first-stage winding 4 is wound with at least half a turn through the first winding channel 26. A portion of the second-stage winding 5 is wound with at least half a turn through the second winding channel 27. The tertiary winding 6 is configured to adjust the coupling coefficient of the magnetic element 1f and includes a first segment 61 and a second segment 62. The first segment 61 is wound on the first pin 221, and the second segment 62 is wound on the third pin 231. In this embodiment, the tertiary winding 6 is perpendicular to the first plate 24 and / or the second plate 25. The two side posts 22 and 23 of the magnetic core assembly 2 are respectively divided into two terminals 221, 222, 231, and 232 to achieve partial coupling through the tertiary winding 6. Furthermore, negative coupling can be achieved according to the arrangement of the secondary windings 4 and 5 and the tertiary winding 6. This allows for adjustment and / or enhancement of the coupling coefficient of the magnetic element 1f. In some embodiments, the auxiliary inductor can be omitted, thereby achieving the advantages of reduced size and lower winding and core losses. In other embodiments, the auxiliary inductor Lc, such as a stand-alone inductor or a trace inductor, is coupled to the tertiary winding 6 and configured to fine-tune the coupling between the secondary inductors.

[0077] Figure 4B This is a three-dimensional schematic diagram showing a magnetic element according to the eighth embodiment of this disclosure. In this embodiment, the structure, components, and functions of the magnetic element 1g are the same as those of the present disclosure. Figure 4A The magnetic element 1f shown is similar. The same reference numerals represent the same elements, and will not be described further here. Figure 4A Compared to the magnetic element 1f shown, the three-stage winding 6 of the magnetic element 1g is parallel to the first plate 24 and / or the second plate 25. In other words, all windings are planar, and the magnetic element 1g has a planar structure. The magnetic element 1g is preferably, but not limited to, a planar magnetic element based on a printed circuit board containing PCB windings.

[0078] Figure 5A This is a circuit diagram showing a power converter comprising multiple modules connected in parallel, wherein a three-stage winding with an integrated magnetic component connects all the modules. Figure 5B This is a three-dimensional schematic diagram showing the integrated magnetic component according to a first embodiment of the present disclosure. Figure 5A and 5B As shown, in this embodiment, an integrated magnetic component 8 is provided, which can be applied to a power converter 200 comprising at least two parallel modules 20. For example, the power converter 200 comprises two modules 20 or three parallel modules 20. The circuit topology of each module 20 is similar to... Figure 1BThe DC-DC converter 100 shown is similar and will not be described again here. The integrated magnetic assembly 8 includes at least two magnetic elements 81 connected to each other. Each magnetic element 81 is preferably, but not limited to, implemented with the structure of magnetic elements 1, 1a, 1b, 1c, 1d, 1e, 1f, and 1g. A plurality of ternary windings 6 of the magnetic elements 81 are connected in series and are used to connect all modules 201 together. In one embodiment, as... Figure 5B As shown, the magnetic elements 81 of the integrated magnetic assembly 8 are separate from each other. Each magnetic element 81 includes an independent inductor or wiring inductor to manage magnetic coupling. In some embodiments, the magnetic elements 81 of the integrated magnetic assembly 8 are connected to each other (not shown). The first side post 22 of one of the plurality of magnetic elements 81 is connected to the second side post 23 of the adjacent magnetic element 81 to form a common post (not shown). The plurality of ternary windings 6 of the magnetic elements 81 are connected in series.

[0079] Figure 5C This is a three-dimensional schematic diagram showing the integrated magnetic component according to a second embodiment of the present disclosure. The structure, components, and functions of the integrated magnetic component 8a are similar to those of the previous embodiment. Figure 5B The integrated magnetic component 8 shown is similar. The same reference numerals represent the same components, and will not be described further here. Figure 5B Compared to the integrated magnetic assembly 8 shown, the integrated magnetic assembly 8a comprises three magnetic elements 81. The magnetic elements 81 are preferably, but not limited to, the structures of magnetic elements 1, 1a, 1b, 1c, 1d, 1e, 1f, and 1g. The three magnetic elements 81 are integrated into a single unit. The second pin 222 of magnetic element 81 and the fourth pin 232 of adjacent magnetic elements 81 are connected to each other to form a common post 82. The common post 82 is integrally formed. A plurality of ternary windings 6 of magnetic element 81 are connected in series. A plurality of independent inductors or wiring inductors are combined to form an auxiliary inductor Lc to optimize magnetic coupling. The auxiliary inductor Lc is used to fine-tune the coupling between the output inductors.

[0080] Figure 6A This is a three-dimensional schematic diagram showing the magnetic element of the ninth embodiment of this disclosure. Figure 6B This is a schematic diagram showing... Figure 6AThe direction of current flowing through the windings and the distribution of magnetic flux in the magnetic element shown are illustrated. Magnetic element 9 includes a core assembly 2, a primary winding 3, a first-stage winding 4, a second-stage winding 5, and a tertiary winding 6. The core assembly 2 includes a center post 21, a first side post 22, and a second side post 23. Compared to magnetic elements 1, 1a, 1b, 1c, 1d, 1e, 1f, and 1g, the first side post 22 and the second side post 23 of magnetic element 9 are not each divided into two terminals. The primary winding 3 is wound with at least two turns on the center post 21 (i.e., multiple portions of the primary winding 3 are wound through the first winding channel 26 and the second winding channel 27). A portion of the first-stage winding 4 is wound through the first winding channel 26 with at least half a turn. A portion of the second-stage winding 5 is wound through the second winding channel 27 with at least half a turn. The first-stage winding 4 is connected to the second-stage winding 5. The tertiary winding 6 is configured to adjust the coupling coefficient of magnetic element 9. The third-stage winding 6 has at least one turn wound on the central post 21. The direction of the current flowing through the winding and the magnetic flux distribution of the core assembly 2 are shown in... Figure 6B Because the multiple parts of the primary winding 3, the two secondary windings 4 and 5, and the tertiary winding 6 are interleaved and aligned with each other in the first winding channel 26 and the second winding channel 27, a positive coupling effect is generated.

[0081] In some embodiments, the magnetic element 9 further includes an auxiliary inductor Lc configured to fine-tune the coupling coefficient of the magnetic element 9. The auxiliary inductor Lc is a wire inductor or a discrete inductor, and is configured to fine-tune the coupling between secondary inductors, thereby enhancing the positive coupling effect.

[0082] Figure 6C This is a three-dimensional schematic diagram showing an integrated magnetic component according to a third embodiment of the present disclosure. In this embodiment, a component applicable to, for example... Figure 5A The power converter 200 shown includes an integrated magnetic assembly 8b. The integrated magnetic assembly 8b comprises at least two magnetic elements connected to each other. Each magnetic element is preferably, but not limited to, implemented as a magnetic element 9. A plurality of ternary windings 6 of the magnetic elements 9 are connected in series and are used to connect all modules 20 (such as...) Figure 5A (As shown) they are connected together. In one embodiment, the plurality of magnetic elements 9 of the integrated magnetic assembly 8b are separate from each other. Each magnetic element 9 includes an independent inductor or trace inductor to manage magnetic coupling. In other embodiments, the magnetic elements 9 of the integrated magnetic assembly 8b are connected to each other to form an integrated structure. The independent inductors or trace inductors are combined to form an auxiliary inductor Lc to minimize magnetic coupling. The auxiliary inductor Lc is used to fine-tune the coupling between the output inductors.

[0083] Figure 7A This is a three-dimensional schematic diagram showing the magnetic element of the tenth embodiment of this disclosure. Figure 7B This is a schematic diagram showing... Figure 7A The direction of current flowing through the winding and the distribution of magnetic flux in the magnetic element shown are illustrated. In this embodiment, the structure, components, and function of the magnetic element 9a are the same as those of the magnetic element 9a. Figure 6A The magnetic element 9 shown is similar. The same reference numerals represent the same elements, and will not be described further here. Compared to Figure 6A The magnetic element 9 shown has a primary winding 4 wound on the first side post 22. A secondary winding 5 wound on the second side post 23. The primary winding 4 is connected to the secondary winding 5. The tertiary winding 6 is configured to adjust the coupling coefficient of the magnetic element 9a. The tertiary winding 6 has at least one turn wound on the central post 21. The direction of the current flowing through the windings and the magnetic flux distribution of the magnetic element are shown in... Figure 7B A negative coupling effect can be generated by adjusting the position and winding method of the winding of the magnetic element 9a.

[0084] Figure 7C This is a three-dimensional schematic diagram showing the magnetic element of the eleventh embodiment of this disclosure. Figure 7D This is a schematic diagram showing... Figure 7C The direction of current flowing through the winding and the distribution of magnetic flux in the magnetic element shown are illustrated. In this embodiment, the structure, components, and function of the magnetic element 9b are the same as those of the magnetic element 9b. Figure 7A The magnetic element 9 shown is similar. The same reference numerals represent the same elements, and will not be described further here. Figure 7A Compared to the magnetic element 9a, the three-stage winding 6 includes a first section 61 and a second section 62. The first section 61 is wound on the first side post 22. The second section 62 is wound on the second side post 23. The current flowing through the first section 61 flows in a second direction D2, and the current flowing through the second section 62 flows in a first direction D1. The first direction D1 and the second direction D2 are opposite to each other. The three-stage winding 6 is configured to adjust the coupling coefficient of the magnetic element 9b. The auxiliary inductor Lc is used to fine-tune the coupling between the output inductors.

[0085] The direction of the current flowing through the winding and the magnetic flux distribution of the magnetic element 9b are shown in Figure 7D By adjusting the position and winding method of the magnetic element 9b, and utilizing a PCB-based negative-coupled inductor with magnetic elements, the advantage of adjusting negative coupling to positive coupling through the three-stage winding 6 can be achieved.

[0086] Figure 7E This is a three-dimensional schematic diagram showing the magnetic element of the twelfth embodiment of the present disclosure. Figure 7F This is a schematic diagram showing... Figure 7E The direction of current flowing through the winding and the distribution of magnetic flux in the magnetic element shown are illustrated. In this embodiment, the structure, components, and function of the magnetic element 9c are the same as those of the magnetic element 9c. Figure 7C The magnetic element 9b shown is similar and will not be described further here. (Similar to...) Figure 7CCompared to the magnetic element 9b, the first side post 22 is divided into a first pin 221 and a second pin 222. The second side post 23 is divided into a third pin 231 and a fourth pin 232. The three-stage winding 6 includes a first section 61 and a second section 62. The first section 61 is wound on one of the first pin 221 and the second pin 222, and the second section 62 is wound on one of the third pin 231 and the fourth pin 232. The current flowing through the first section 61 flows in the second direction D2, and the current flowing through the second section 62 flows in the first direction D1. The first direction D1 and the second direction D2 are opposite to each other. The three-stage winding 6 is configured to adjust the coupling coefficient of the magnetic element 9c. The auxiliary inductor Lc is configured to assist in the fine adjustment of the coupling coefficient. The direction of the current flowing through the winding and the magnetic flux distribution of the magnetic element are shown in Figure 7F By adjusting the position and winding method of the magnetic element 9c winding, and utilizing a PCB-based negative-coupled inductor with magnetic elements, the advantage of adjusting negative coupling to positive coupling via the three-stage winding 6 can be achieved. Furthermore, the three-stage winding 6 only couples the side posts 22 and 23, thereby allowing for selective coupling adjustment.

[0087] Figure 8 This is a three-dimensional schematic diagram showing an integrated magnetic component according to a fourth embodiment of the present disclosure. In this embodiment, an integrated magnetic component 8c is provided, which can be applied to applications similar to... Figure 5A The power converter 200 shown is a power converter. The integrated magnetic component 8c includes at least two magnetic elements 9b connected to each other. Each magnetic element 9b is preferably, but not limited to, implemented in the structure of magnetic elements 9, 9a, and 9c. A plurality of ternary windings 6 of magnetic elements 9a are connected in series and are used to connect all modules 20 (such as...) Figure 5A (As shown) are connected together. A plurality of magnetic elements 9b are interconnected to form a single structure. A plurality of tertiary windings 6 of magnetic elements 9b are connected in series. A plurality of independent inductors or wiring inductors are combined to form an auxiliary inductor Lc to optimize magnetic coupling. The auxiliary inductor Lc is used to fine-tune the coupling between the output inductors. This integration utilizes the architecture of the core assembly 2, primary winding 3, secondary windings 4 and 5, and tertiary winding 6 described above, achieving enhanced coupling and performance between multiple modules, further optimizing the overall system efficiency and scalability.

[0088] Figure 9A , Figure 9B and Figure 9C The magnetic components of the coupling inductors used in the two-phase buck converter are shown respectively. In these embodiments, the secondary circuit of the two-phase buck converter includes four switches SR1, SR2, SR3, and SR4. Magnetic components 1h, 1i, and 1j are respectively... Figure 2A , 2B It can be modified from the structure shown in 2C. Figure 9A, 9B The embodiment architecture shown in 9C includes two inductor windings with a positively coupled structure that minimizes winding length to reduce winding losses. The combination of multiple tertiary windings 6 and the auxiliary inductor Lc allows for fine-tuning of the coupling, enabling a transition from positive to negative coupling as needed. The connection method of the windings on the pins can be determined according to… Figure 9A Or the architecture shown in 9B. Furthermore, by adopting... Figure 9C The partially coupled structure shown can eliminate the need for an auxiliary inductor, thereby further optimizing the design, reducing size and losses, and improving overall efficiency.

[0089] Figure 10 This illustrates the magnetic assembly of the coupling inductor used in a two-phase buck converter. In this embodiment, the magnetic assembly 1k is... Figure 3 The structure shown is a modification. This architecture includes two inductor windings with positive coupling, minimizing winding length to reduce winding losses. The three-stage winding 6, the auxiliary inductor Lc, and the pins 221, 222, 231, and 232 of the partially coupled side posts 22 and 23 are paired to fine-tune the coupling, thereby enabling a transition from positive to negative coupling as needed.

[0090] Figure 11A This is a three-dimensional schematic diagram showing the magnetic element of the thirteenth embodiment of the present disclosure. Figure 11B This is a cross-sectional schematic diagram, showing Figure 11A The detailed structure of the magnetic element is shown. In this embodiment, the structure, components, and functions of the magnetic element 10 are the same as those of the magnetic element 10. Figure 3 The magnetic element 1e shown is similar. The same reference numerals represent the same elements and will not be described again here. In this embodiment, the magnetic element 10 includes a core assembly 2, a primary winding 3, a first-stage winding 4, and a second-stage winding 5. The two side posts 22 and 23 of the core assembly 2 are respectively divided into two pins 221, 222, 231, and 232. (Similar to...) Figure 3The magnetic element 1e shown omits the three-stage winding. Furthermore, the primary winding 3 includes a first segment 31, a second segment 32, and a third segment 33. The first segment 31 is wound around one of the first pin 221 and the second pin 222. The second segment 32 is wound around one of the third pin 231 and the fourth pin 232. The third segment 33 is wound around the center post 21 (i.e., multiple portions of the primary winding 3 are wound through the first winding channel 26 and the second winding channel 27). A portion of the first primary winding 4 is wound through the first winding channel 26 with at least half a turn. A portion of the second primary winding 5 is wound through the second winding channel 27 with at least half a turn. In some embodiments, the first primary winding 4 is wound with at least one turn around one of the first side post 22 and the center post 21, and the second primary winding 5 is wound with at least one turn around one of the center post 21 and the second side post 23.

[0091] In this embodiment, preferably but not limited, the first cross-sectional area A1 of the first pin 221 is not equal to the second cross-sectional area A2 of the second pin 222, and the third cross-sectional area A3 of the third pin 231 is not equal to the fourth cross-sectional area A4 of the fourth pin 232. In this embodiment, the magnetic element 10 is a fractional-winding planar transformer. Preferably but not limited, the turns ratio of the magnetic element 10 is 2.5:1. By using the magnetic element 10 with a fractional-winding structure, lower leakage inductance, lower winding and core losses are achieved, improving power density and efficiency. Since the two side posts 22 and 23 of the core assembly 2 are each divided into two pins to achieve partial coupling through the primary winding 3, the turns ratio of the magnetic element 10 can be adjusted as needed.

[0092] Figure 11C This is a three-dimensional schematic diagram showing a magnetic element according to the fourteenth embodiment of the present disclosure. In this embodiment, the structure, components, and functions of the magnetic element 10a are the same as those of the present disclosure. Figure 11A and 11B The magnetic element 10 shown is similar and will not be described again here. In this embodiment, the magnetic element 10a includes a core assembly 2, a primary winding 3, a first-stage winding 4, and a second-stage winding 5. The two side posts 22 and 23 of the core assembly 2 are respectively divided into two pins 221, 222, 231, and 232. Figure 11ACompared to the magnetic element 10 shown, the winding method of the primary winding 3 is different. In this embodiment, the current flowing through the first section 31 and the third section 33 flows in the second direction D2. The current flowing through the second section 32 flows in the first direction D1. The first direction D1 and the second direction D2 are opposite to each other. In this embodiment, the magnetic element 10a is a fractional winding planar transformer. The turns ratio of the magnetic element 10a is preferably, but not limited to, 2.5:1. By using the magnetic element 10a with a fractional winding structure, lower leakage inductance, lower winding and core losses are achieved, improving power density and efficiency. Since the two side posts 22 and 23 of the core assembly 2 are each divided into two pins to achieve partial coupling through the primary winding 3, the turns ratio of the magnetic element 10a can be adjusted as needed.

[0093] Figure 12A This is a three-dimensional schematic diagram showing the magnetic element of the fifteenth embodiment of this disclosure. The structure, components, and functions of the magnetic element 10b are similar to those of the present disclosure. Figure 11C The magnetic element 10a shown is similar. The same reference numerals represent the same elements and will not be described again here. In this embodiment, the magnetic element 10a includes a core assembly 2, a primary winding 3, a first-stage winding 4, a second-stage winding 5, and a tertiary winding 6. The two side posts 22 and 23 of the core assembly 2 are respectively divided into two pins 221, 222, 231, and 232. (Similar to...) Figure 11C Compared to the magnetic element 10a shown, magnetic element 10b further includes a three-stage winding 6. The primary winding 3 includes a first segment 31, a second segment 32, and a third segment 33. The first segment 31 is wound around a first pin 221. The second segment 32 is wound around a third pin 231. The third segment 33 is wound around a center post 21 (i.e., multiple portions of the primary winding 3 are wound through the first winding channel 26 and the second winding channel 27). A portion of the first primary winding 4 is wound through the first winding channel 26 with at least half a turn. A portion of the second primary winding 5 is wound through the second winding channel 27 with at least half a turn. In some embodiments, the first primary winding 4 is wound with at least one turn on one of the first side post 22 and the center post 21, and the second primary winding 5 is wound with at least one turn on one of the center post 21 and the second side post 23. The three-stage winding 6 includes a first segment 61 and a second segment 62. The first section 61 is wound around the first pin 221. The second section 62 is wound around the third pin 231. The two side posts 22 and 23 of the magnetic core assembly 2 are respectively divided into two pins 221, 222, 231 and 232 to achieve partial coupling through the three-stage winding 6, thereby adjusting and / or enhancing the coupling coefficient of the magnetic element 10b.

[0094] Furthermore, the magnetic element 10b is a fractional-winding planar transformer. Preferably, but not limited to, the turns ratio of the magnetic element 10b is 2.5:1. By using the magnetic element 10b with a fractional-winding structure, lower leakage inductance, lower winding and core losses are achieved, thereby improving power density and efficiency. Since the two side posts 22 and 23 of the core assembly 2 are each divided into two terminals to achieve partial coupling through the primary winding 3, the turns ratio of the magnetic element 10b can be adjusted as needed.

[0095] Figure 12B This is a three-dimensional schematic diagram showing a magnetic element according to the sixteenth embodiment of the present disclosure. In this embodiment, the structure, components, and functions of the magnetic element 10c are the same as those of the present disclosure. Figure 12A The magnetic element 10b shown is similar and will not be described further here. (Similar to...) Figure 12A Compared to the magnetic element 10b, the positions of the first section 61 and the second section 62 of the three-stage winding 6 are different. The first section 31 of the primary winding 3 is wound on the first terminal 221. The second section 32 of the primary winding 3 is wound on the third terminal 231. The third section 33 of the primary winding 3 is wound on the center post 21. The first section 61 of the three-stage winding 6 is wound on the second terminal 222. The second section 62 of the three-stage winding 6 is wound on the fourth terminal 232. The two side posts 22 and 23 of the core assembly 2 are respectively divided into two terminals 221, 222, 231, and 232 to achieve partial coupling through the three-stage winding 6, thus adjusting and / or enhancing the coupling coefficient of the magnetic element 10c. Furthermore, the magnetic element 10c is a fractional-winding planar transformer. Preferably, but not limited to, the turns ratio of the magnetic element 10c is 2.5:1. By using a magnetic element 10c with a fractional winding structure, lower leakage inductance, lower winding and core losses are achieved, thereby improving power density and efficiency. Since the two side posts 22 and 23 of the core assembly 2 are each divided into two pins to achieve partial coupling through the primary winding 3, the turns ratio of the magnetic element 10c can be adjusted as needed.

[0096] Based on the foregoing, this disclosure provides a magnetic element and an integrated magnetic assembly. The magnetic element and integrated magnetic assembly utilize direct winding and direct core structures to achieve adjustable and / or enhanced coupling between coupled inductors within the magnetic element. Furthermore, the magnetic element and integrated magnetic assembly of this disclosure can achieve negative coupling while ensuring the shortest winding path, and minimize winding losses in the CDR topology using direct winding and direct core structures, while allowing fine-tuning of the coupling coefficient by adding additional windings or inductors. This adjustment enables a transition from positive to negative coupling, thereby improving the transient response of the DC-DC converter. Conversely, the magnetic element and integrated magnetic assembly of this disclosure also allow for the conversion of negative coupling to positive coupling to reduce output current ripple. The magnetic element and integrated magnetic assembly of this disclosure can also achieve the above objectives without adding additional inductors, thereby reducing total losses and minimizing footprint and size.

[0097] Furthermore, the magnetic element and integrated magnetic assembly disclosed herein can be applied to multi-module architectures, improving performance by optimizing inductive coupling between multiple modules, thereby increasing efficiency and enabling compact system designs. In some embodiments, the magnetic element is a fractional-winding planar transformer. Because the two columns of this magnetic assembly are each divided into two terminals, partial coupling is achieved through the primary winding, thus the turns ratio of this magnetic element can be adjusted as needed. By using a magnetic element with a fractional-winding structure, lower leakage inductance, lower winding and core losses can be achieved, along with increased power density and efficiency.

[0098] This disclosure may be modified in various ways by those skilled in the art, but all modifications shall not deviate from the scope of protection sought in the appended patent application.

Claims

1. A magnetic element comprising: A magnetic core assembly includes a central post, a first side post, and a second side post. A first winding channel is formed between the central post and the first side post, and a second winding channel is formed between the central post and the second side post. The first side post includes a first pin, a second pin, and a first sub-winding channel, which is disposed between the first pin and the second pin. The second side post includes a third pin, a fourth pin, and a second sub-winding channel, which is disposed between the third pin and the fourth pin. A primary winding comprising a plurality of portions wound through the first winding channel and the second winding channel; A primary winding, including a portion of which is wound through the ground in the primary winding channel; A second-stage winding, including a portion passing through the ground and wound in the second-stage winding channel, and connected to the first-stage winding; and A three-stage winding includes a first section and a second section, wherein the first section is wound on one of the first pin and the second pin, and the second section is wound on one of the third pin and the fourth pin.

2. The magnetic element of claim 1, further comprising an auxiliary inductor configured to adjust a coupling coefficient of the magnetic element, wherein the auxiliary inductor is a trace inductor and the trace inductor is electrically connected to the three-stage winding, or wherein the auxiliary inductor includes an inductor core having a channel passing through it, and a portion of the three-stage winding is wound through the channel of the inductor core, or wherein the auxiliary inductor is a discrete inductor and includes an inductor core and an inductor winding.

3. The magnetic element as claimed in claim 1, wherein the current flowing through the first section of the three-stage winding flows in a first direction, and the current flowing through the second section of the three-stage winding flows in a second direction, wherein the first direction and the second direction are opposite to each other.

4. The magnetic element as claimed in claim 1, wherein the primary winding is wound on the central post, or wound on the first side post and the second side post, or wound on one of the first pin and the second pin and one of the third pin and the fourth pin, wherein the first primary winding is wound on the central post or the first side post, and the second primary winding is wound on the central post or the second side post.

5. The magnetic element as claimed in claim 4, wherein the primary winding is wound on the central post, the first secondary winding is wound on the first side post, the second secondary winding is wound on the second side post, the first section of the tertiary winding is wound on the first pin, and the second section of the tertiary winding is wound on the third pin.

6. The magnetic element as claimed in claim 4, wherein the primary winding comprises a first section and a second section, the first section being wound on the first side post, the second section being wound on the second side post, the first primary winding being wound on the first side post, the second primary winding being wound on the second side post, the first section of the tertiary winding being wound on the first pin, and the second section of the tertiary winding being wound on the third pin.

7. The magnetic element as claimed in claim 4, wherein the primary winding is wound on the central post, the first secondary winding is wound on the first side post, the second secondary winding is wound on the second side post, the first section of the tertiary winding is wound on the second pin, and the second section of the tertiary winding is wound on the fourth pin.

8. The magnetic element of claim 4, wherein the primary winding comprises: A first section is provided around one of the first pin and the second pin; A second section, which is disposed around one of the third and fourth pins; and The third section is located around the central pillar. The first-stage winding consists of at least one turn wound on the first side post, or a portion of the first-stage winding is wound through the first winding channel between the first side post and the center post. The second-stage winding consists of at least one turn wound on either the second side post or the center post, or a portion of the second-stage winding is wound through the second winding channel between the second side post and the center post. The first section of the three-stage winding is wound on one of the first and second terminals, and the second section of the three-stage winding is wound on one of the third and fourth terminals.

9. The magnetic element of claim 1 further comprises at least one printed circuit board, wherein at least one of the primary winding, the first secondary winding, the second secondary winding, and the third tertiary winding is disposed in the at least one printed circuit board.

10. The magnetic element of claim 1, wherein the core assembly comprises a first plate and a second plate, wherein the central post, the first side post and the second side post are respectively connected between the first plate and the second plate, and the central post is disposed between the first side post and the second side post, wherein the core assembly has a first side, a second side, a third side and a fourth side, the first side and the second side being opposite to each other, and the third side and the fourth side being opposite to each other, wherein the first sub-winding channel and the second sub-winding channel are parallel to the third side and the fourth side, or the first sub-winding channel and the second sub-winding channel are perpendicular to the third side and the fourth side.

11. An integrated magnetic component, comprising: At least two magnetic elements are connected to each other, wherein each of the at least two magnetic elements comprises: A magnetic core assembly includes a central post, a first side post, and a second side post. A first winding channel is formed between the central post and the first side post, and a second winding channel is formed between the central post and the second side post. The first side post includes a first pin, a second pin, and a first sub-winding channel, which is disposed between the first pin and the second pin. The second side post includes a third pin, a fourth pin, and a second sub-winding channel, which is disposed between the third pin and the fourth pin. A primary winding comprising a plurality of portions wound through the first winding channel and the second winding channel; A primary winding, including a portion of which is wound through the ground in the primary winding channel; A second-stage winding, including a portion passing through the ground and wound in the second-stage winding channel, and connected to the first-stage winding; and A three-stage winding includes a first section and a second section, wherein the first section is wound on one of the first pin and the second pin, and the second section is wound on one of the third pin and the fourth pin; in, One of the at least two magnetic elements has its first side post connected to the second side post of the adjacent magnetic element to form a common post; and The three-stage windings of the at least two magnetic elements are connected in series.

12. A magnetic element comprising: A magnetic core assembly includes a central post, a first side post, and a second side post, wherein a first winding channel is formed between the central post and the first side post, and a second winding channel is formed between the central post and the second side post. A primary winding comprising a plurality of portions wound through the first winding channel and the second winding channel; A primary winding, including a portion of which is wound through the ground in the primary winding channel; A second-stage winding, including a portion passing through the ground and wound in the second-stage winding channel, and connected to the first-stage winding; and A three-stage winding is wound on the central post, or wound on the first side post and the second side post.

13. An integrated magnetic component, comprising: At least two magnetic elements are connected to each other, wherein each of the at least two magnetic elements comprises: A magnetic core assembly includes a central post, a first side post, and a second side post, wherein a first winding channel is formed between the central post and the first side post, and a second winding channel is formed between the central post and the second side post. A primary winding comprising a plurality of portions wound through the first winding channel and the second winding channel; A primary winding, including a portion of which is wound through the ground in the primary winding channel; A second-stage winding, including a portion passing through the ground and wound in the second-stage winding channel, and connected to the first-stage winding; and A three-stage winding is wound on the central post, or wound on the first side post and the second side post; in, One of the at least two magnetic elements has its first side post connected to the second side post of the adjacent magnetic element to form a common post; and The three-stage windings of the at least two magnetic elements are connected in series.

14. A magnetic element comprising: A magnetic core assembly includes a central post, a first side post, and a second side post. A first winding channel is formed between the central post and the first side post, and a second winding channel is formed between the central post and the second side post. The first side post includes a first pin, a second pin, and a first sub-winding channel, which is disposed between the first pin and the second pin. The second side post includes a third pin, a fourth pin, and a second sub-winding channel, which is disposed between the third pin and the fourth pin. A primary winding is wound on the center post, and wound on one of the first and second terminals and on one of the third and fourth terminals; A primary winding, including a portion of which is wound through the ground in the primary winding channel; and A second-stage winding includes a portion that passes through the second-stage winding channel and is connected to the first-stage winding.

15. The magnetic element of claim 14, wherein the first primary winding is wound on the central post or the first side post, and the second primary winding is wound on the central post or the second side post.

16. The magnetic element of claim 15, further comprising a three-stage winding, wherein the three-stage winding comprises a first segment and a second segment, the first segment being wound on one of the first pin and the second pin, and the second segment being wound on one of the third pin and the fourth pin.

17. The magnetic element of claim 16, further comprising an auxiliary inductor configured to adjust a coupling coefficient of the magnetic element, wherein the auxiliary inductor is a trace inductor and is electrically connected to the three-stage winding, or wherein the auxiliary inductor includes an inductor core having a channel passing through it, and a portion of the three-stage winding is wound around the channel passing through the inductor core, or wherein the auxiliary inductor is a discrete inductor and includes an inductor core and an inductor winding.

18. The magnetic element of claim 16, wherein the current flowing through the first section of the three-stage winding flows in a first direction, and the current flowing through the second section of the three-stage winding flows in a second direction, wherein the first direction and the second direction are opposite to each other.

19. The magnetic element of claim 14, wherein the primary winding comprises: A first section is provided around one of the first pin and the second pin; A second section, which is disposed around one of the third and fourth pins; and The third section is located around the central column; The primary winding is wound around the first side post or the center post, or a portion of the primary winding is wound through the first winding channel between the first side post and the center post; and The second-stage winding is wound on the second side post or the center post, or a portion of the second-stage winding is wound through the second winding channel between the second side post and the center post.

20. The magnetic element of claim 14, further comprising at least one printed circuit board, wherein at least one of the primary winding, the first secondary winding, and the second secondary winding is disposed in the at least one printed circuit board.

21. The magnetic element of claim 14, wherein the core assembly further comprises a first plate and a second plate, wherein the central post, the first side post and the second side post are respectively connected between the first plate and the second plate, and the central post is disposed between the first side post and the second side post, wherein the core assembly has a first side, a second side, a third side and a fourth side, the first side and the second side being opposite to each other, and the third side and the fourth side being opposite to each other, wherein the first sub-winding channel and the second sub-winding channel are parallel to the third side and the fourth side, or the first sub-winding channel and the second sub-winding channel are perpendicular to the third side and the fourth side.

22. A magnetic element comprising: A magnetic core assembly includes a central post, a first side post, and a second side post. A first winding channel is formed between the central post and the first side post, and a second winding channel is formed between the central post and the second side post. The first side post includes a first pin, a second pin, and a first sub-winding channel, which is disposed between the first pin and the second pin. The second side post includes a third pin, a fourth pin, and a second sub-winding channel, which is disposed between the third pin and the fourth pin. A first inductor winding, including a portion that passes through the ground and is wound in the first winding channel; A second inductor winding, including a portion passing through ground and wound in the second winding channel, and connected to the first inductor winding; and A three-stage winding includes a first section and a second section, wherein the first section is wound on one of the first pin and the second pin, and the second section is wound on one of the third pin and the fourth pin.

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