Inductive structure determination method, storage medium, electronic device, and program product

Abstract

The application discloses a kind of inductance structure determination method, storage medium, electronic equipment and program product, involve computer technical field, wherein method includes: first, the design parameter data of inductance is acquired;Then according to design parameter data and preset symmetry magnetic core shape rule, the magnetic core structure data corresponding to inductance is determined;Again according to design parameter data, the winding structure data corresponding to inductance is determined;Finally, based on winding structure data and magnetic core structure data, the structure of inductance is determined.Such can obtain inductance structure with symmetry according to winding structure data and magnetic core structure data, based on the mode that symmetry magnetic core shape rule determines inductance structure, can make inductance interphase coupling more uniform, facilitate to adjust the structure parameter of inductance, reduce the design time of inductance structure, increase the convenience of inductance phase number expansion.

Description

Technical Field

[0001] This disclosure relates to the field of computer technology, and in particular to a method for determining an inductor structure, a storage medium, an electronic device, and a program product. Background Technology

[0002] Multiphase coupled inductors transfer energy from one coil to another through the interaction of magnetic fields, thereby achieving signal transmission or energy conversion.

[0003] Currently, in determining the structure of multiphase inductors, related technologies typically rely on human experience for inductor structure design, which may lead to uneven interphase coupling and increase the design time of the inductor structure. Summary of the Invention

[0004] This disclosure provides a method for determining inductor structures, a storage medium, an electronic device, and a program product. Its main purpose is to address the problem that in related technologies, the determination of multiphase inductor structures is often based on manual experience, which can lead to uneven inter-phase coupling and increase the design time of the inductor structure.

[0005] In a first aspect, this application provides a method for determining the structure of an inductor, including:

[0006] Obtain the design parameter data of the inductor;

[0007] Based on the design parameter data and the preset symmetrical core shape rules, determine the core structure data corresponding to the inductor;

[0008] Based on the design parameter data, determine the winding structure data corresponding to the inductor;

[0009] The structure of the inductor is determined based on the winding structure data and the core structure data.

[0010] Secondly, this application provides an apparatus for determining an inductor structure, comprising:

[0011] The acquisition module is configured to acquire the design parameter data of the inductor.

[0012] The determination module is configured to determine the core structure data corresponding to the inductor based on the design parameter data and the preset symmetrical core shape rules;

[0013] The determination module is configured to determine the winding structure data corresponding to the inductor based on the design parameter data;

[0014] The determination module is configured to determine the structure of the inductor based on winding structure data and core structure data.

[0015] Thirdly, this application provides an inductor structure, including: a bottom magnetic core, a top magnetic core, and a winding;

[0016] The shapes of the top and bottom magnetic cores conform to a preset symmetrical magnetic core shape rule;

[0017] The windings are arranged between the top and bottom magnetic cores to form an inductor.

[0018] Fourthly, this application provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the method of the first aspect.

[0019] Fifthly, this application provides an electronic device, including a storage medium, a processor, and a computer program stored on the storage medium and executable on the processor, wherein the processor executes the computer program to implement the method of the first aspect.

[0020] In a sixth aspect, this application provides a computer program product having a computer program stored thereon, wherein the computer program, when executed by a processor, implements the method of the first aspect.

[0021] The present disclosure provides a method, storage medium, electronic device, and program product for determining the inductor structure. The method includes: first, acquiring the inductor's design parameter data; then, determining the corresponding core structure data based on the design parameter data and a preset symmetrical core shape rule; next, determining the corresponding winding structure data based on the design parameter data; and finally, determining the inductor structure based on the winding structure data and the core structure data. Compared to existing technologies, this application can generate a symmetrical core shape based on the inductor's design parameter data and a preset symmetrical core shape rule, then determine the corresponding winding structure data and core structure data based on the symmetrical core shape, and finally obtain a symmetrical inductor structure based on the winding structure data and the core structure data. This method of determining the inductor structure based on the symmetrical core shape rule allows for more uniform inter-phase coupling of the inductor, facilitates adjustment of the inductor's structural parameters, reduces the design time for the inductor structure, and increases the convenience of expanding the number of inductor phases.

[0022] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of this application, nor is it intended to limit the scope of this application. Other features of this application will become readily apparent from the following description. Attached Figure Description

[0023] To more clearly illustrate the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 A flowchart illustrating a method for determining an inductor structure according to an embodiment of this application is shown;

[0025] Figure 2 A planar schematic diagram of a four-phase coupled inductor provided in an embodiment of this application is shown;

[0026] Figure 3 A planar schematic diagram of a six-phase coupled inductor provided in an embodiment of this application is shown;

[0027] Figure 4 A planar schematic diagram of a three-phase coupled inductor provided in an embodiment of this application is shown;

[0028] Figure 5 An exploded view of a five-phase symmetrical coupled inductor provided in an embodiment of this application is shown;

[0029] Figure 6 This illustration shows a schematic diagram of the multiphase coupled inductor design process provided in an embodiment of this application;

[0030] Figure 7 This paper illustrates a schematic diagram showing the specific design parameters of a multiphase inductor module provided in an embodiment of this application.

[0031] Figure 8 This illustration shows a phase-coupled inductor output bus layout diagram provided in an embodiment of this application;

[0032] Figure 9 A schematic diagram of a modular design for a multiphase coupled inductor (with the inductor located at the bottom) provided in an embodiment of this application is shown.

[0033] Figure 10 A schematic diagram of a modular design for a multiphase coupled inductor (with the inductor located at the top) provided in an embodiment of this application is shown.

[0034] Figure 11 This illustration shows another modular design of a multiphase coupled inductor (with the inductor located at the top) provided by an embodiment of this application;

[0035] Figure 12 A schematic diagram of the inductor structure provided in an embodiment of this application is shown;

[0036] Figure 13 A schematic diagram of the magnetic core structure provided in an embodiment of this application is shown;

[0037] Figure 14 A schematic diagram of an inductor structure determination device provided in an embodiment of this application is shown. Detailed Implementation

[0038] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this application.

[0039] It should be noted that, in the description of this application, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. The terms "first," "second," etc., in this application are used to distinguish similar objects and are not used to describe a specific order or sequence.

[0040] Currently, servers require higher data throughput, faster computing speeds, and more complex workloads. Server power supplies need higher power density, and inductors are one of the core components in power supply design (such as switching power supplies (e.g., DC-DC converters), linear power supplies, etc.). The energy storage characteristics of inductors determine the stability and response speed of the output voltage. Improper inductor design will lead to excessive voltage ripple or reduced power supply efficiency, decreasing the power supply's dynamic response capability and affecting output voltage stability. Furthermore, inductors typically occupy a significant portion of the power supply design space; improper inductor design will waste printed circuit board (PCB) space and affect system stability.

[0041] To adapt to server rack designs, power systems are evolving towards higher frequencies, smaller sizes, and modularity. Reducing the size of inductors and other components increases overall power density; therefore, passive components like inductors need to meet requirements for high integration and high reliability. Server power supplies handle large currents and demand high current quality, necessitating multi-phase power supply schemes. Coupled inductors can reduce the size of multi-phase power supplies by sharing a magnetic core. The coupling of magnetic flux between phases reduces current ripple and improves power efficiency. Furthermore, integrating inductors with other magnetic components further enhances power density and overall efficiency.

[0042] In related technologies, the design of coupled inductors often adopts a rectangular structure, which is generally not symmetrical. This results in a large difference between the coupling inductance of the two-end phases and the coupling inductance of the middle phases, leading to uneven coupling between phases. This requires manual adjustment based on experience, which increases the difficulty of manual adjustment. Furthermore, the DC impedance is high, affecting power density and efficiency. Moreover, based on this structure, it is difficult to expand the number of inductor phases, and there are few adjustable parameters, making it impossible to finely customize the inductor.

[0043] To address the technical problem that determining the structure of multiphase inductors often relies on manual experience, which can lead to uneven interphase coupling and increased design time, this embodiment provides a method for determining the inductor structure. Figure 1 As shown, the method includes the following steps:

[0044] Step 101: Obtain the design parameter data of the inductor.

[0045] In some embodiments, the design parameters of the inductor can be obtained according to actual inductor design requirements, such as power integration requirements, inductor arrangement, and winding arrangement. The inductor structure is then designed based on these parameters to obtain an inductor that meets the design requirements. For example, the inductor can be a multiphase coupled inductor, and its components may include, but are not limited to, a top magnetic core, a bottom magnetic core, and windings. The design parameters may include, but are not limited to, the number of phases, inductance value, footprint, switching frequency, permeability, coupling coefficient, and coupling uniformity.

[0046] Step 102: Based on the design parameter data and the preset symmetrical core shape rules, determine the core structure data corresponding to the inductor.

[0047] In some embodiments, a symmetrical core shape rule can be preset. This rule can be used to generate a core shape with symmetry (such as centrosymmetry). Then, based on the symmetrical core shape, specific core structure data can be determined. This symmetrical core shape facilitates core structure design, improves design efficiency, and balances the coupling symmetry between phases, thus improving the inductor's coupling effect. In the actual inductor structure design process, the core shape can be automatically determined based on specific parameters in the design parameter data. For example, if the number of phases in the design parameter data is six, the core shape can be determined to be a regular hexagon. The core structure data can be used to determine the physical structure of the core, and may include side length, height, material, etc.

[0048] Step 103: Based on the design parameter data, determine the winding structure data corresponding to the inductor.

[0049] The winding structure data may include materials, number of turns, wire diameter, groove angle, etc. For example, based on the design parameter data, the winding method (wound in the same plane or in different planes) and winding direction (such as clockwise or counterclockwise) of the winding can be obtained. Then, the winding structure is designed according to the selected winding method and other data to obtain the corresponding winding structure data to meet various application scenarios.

[0050] Step 104: Determine the structure of the inductor based on the winding structure data and the core structure data.

[0051] In some embodiments, the structure and material of the winding can be determined based on the winding structure data, and the structure and material of the magnetic core can be determined based on the magnetic core structure data. Then, the magnetic core and winding are combined to obtain the overall structure of the inductor. Then, according to the actual application scenario, the inductor is laid out on the PCB. Multiple inductors can be combined into a multi-phase parallel transmission structure, and the corresponding current transmission path can be designed to meet the power supply integration requirements.

[0052] Compared with related technologies, this embodiment can generate a symmetrical core shape based on the inductor's design parameters and a preset symmetrical core shape rule. Then, based on the symmetrical core shape, it determines the winding structure data and core structure data corresponding to the inductor. Finally, based on the winding structure data and core structure data, it obtains a symmetrical inductor structure. The method of determining the inductor structure based on the symmetrical core shape rule can make the inductor phase coupling more uniform, facilitate the adjustment of the inductor's structural parameters, reduce the design time of the inductor structure, and increase the convenience of expanding the number of inductor phases.

[0053] Furthermore, as a refinement and extension of the above embodiments, in order to specifically illustrate the process of determining the inductor structure, step 102 may optionally include: determining the core shape corresponding to the inductor based on the number of phases in the design parameter data and the preset symmetrical core shape rules; and determining the core structure data corresponding to the inductor based on the inductance value and coupling coefficient in the design parameter data, combined with the core shape.

[0054] In some embodiments, the preset symmetrical core shape rules may include: the core shape is a centrally symmetrical figure; or, the core shape is a symmetrical figure; or, the core shape is a regular polygon. For example, the basic shape of the inductor can be determined according to the number of phases in the design requirements and by applying the symmetrical core shape rules. For multi-phase inductors, the same core can be shared to make the magnetic flux paths between inductors as consistent as possible. Then, based on the required inductance value and coupling coefficient, specific structural data such as the core size and material (e.g., ferrite) of the inductor are designed.

[0055] Optionally, the core shape of the inductor can be determined based on the number of phases in the design parameter data and the preset symmetrical core shape rules. Specifically, this may include: determining the core shape to be a regular polygon based on the symmetrical core shape rules, and determining the number of sides of the regular polygon based on the number of phases.

[0056] For example, if the coupled inductor has three phases, an equilateral triangle is used as the core shape of the three-phase coupled inductor; if the coupled inductor has six phases, a regular hexagon is used as the core shape of the six-phase coupled inductor. In this way, this embodiment can be extended based on any number of phases, improving the coupling coefficient and symmetry of each phase of the coupled inductor, thereby improving the power conversion efficiency, while taking into account the symmetry and simplicity of the structure, facilitating planar layout and power module integration.

[0057] Optionally, based on the inductance value and coupling coefficient in the design parameter data, and in combination with the core shape, the core structure data corresponding to the inductor is determined. Specifically, this may include: determining the bottom region corresponding to the core based on the inductance value and core shape; determining the first protruding region corresponding to the core based on the inductance value, wherein the first protruding region is the edge region above the bottom region; determining the second protruding region corresponding to the core based on the coupling coefficient, wherein the second protruding region is the center region above the bottom region; and determining the core structure data based on the bottom region, the first protruding region, and the second protruding region.

[0058] In some embodiments, the magnetic core may include, but is not limited to, a bottom region, a first protruding region, and a second protruding region. The bottom region may be a base region determined based on the shape and inductance value of the magnetic core. The first protruding region is located above the bottom region, distributed along its upper edge, and may be arc-shaped to ensure maximum winding path length for achieving high inductance. The second protruding region is located in the central region above the bottom region. Specifically, based on design parameters, parameters of each region of the magnetic core can be adjusted to determine the structural data of each region, ultimately obtaining the overall magnetic core structure data.

[0059] In some embodiments, the effective cross-sectional area and magnetic circuit length of the magnetic core can be calculated based on information such as inductance value, number of phases, and floor space in the design parameter data, as well as the characteristics of the magnetic core material, thereby initially obtaining the current structural data corresponding to the bottom region, the first protruding region, and the second protruding region, respectively. The current structural data corresponding to the bottom region may include, but is not limited to, side length and height; the current structural data corresponding to the first protruding region may include, but is not limited to, radius and height; and the current structural data corresponding to the second protruding region may include, but is not limited to, width, side length, and height.

[0060] Optionally, the first protruding area corresponding to the magnetic core can be determined based on the inductance value. Specifically, this may include: obtaining the current inductance value corresponding to the magnetic core; and determining the first protruding area by comparing the current inductance value with the inductance value.

[0061] For example, the current inductance value corresponding to the current structural data can be calculated using an inductance value calculation formula, or the inductance value of the magnetic core can be predicted using electromagnetic field simulation software. Then, the difference between the current inductance value and the inductance value in the design parameter data can be calculated. Based on the difference, the current structural data of the first protruding area can be adjusted so that the adjusted inductance value is close to the inductance value in the design parameter data. For example, if the current inductance value is less than the inductance value in the design parameter data, the height of the first protruding area can be increased, or the radius of the first protruding area can be increased.

[0062] Optionally, the second protruding region corresponding to the magnetic core can be determined based on the coupling coefficient. Specifically, the second protruding region can be determined based on the coupling coefficient and the coupling uniformity in the design parameter data. The second protruding region has a centrally symmetrical structure.

[0063] The shape of the second protruding region can be a centrally symmetrical figure. The number of side lengths is determined according to the number of phases. This balances the magnetic circuits between phases while maintaining central symmetry, which helps to shorten the magnetic circuit paths between phases and further improves the coupling symmetry between phases.

[0064] In some embodiments, after initially obtaining the current structural data of the second protruding region based on the design parameter data, the current structural data of the second protruding region can be adjusted using the coupling coefficient and coupling uniformity.

[0065] Optionally, the second prominent region can be determined based on the coupling coefficient and the coupling uniformity in the design parameter data. Specifically, this may include: obtaining the current coupling coefficient and the current coupling uniformity corresponding to the magnetic core; and determining the second prominent region by comparing the current coupling coefficient with the current coupling uniformity and the current coupling uniformity with the current coupling uniformity.

[0066] For example, simulation software can be used to analyze and obtain the current coupling coefficient and current coupling uniformity corresponding to the current structural data, or a multi-point measurement method can be used to perform multiple coupling coefficient measurements at different locations or different winding segments, and then the consistency of these values ​​can be compared to obtain the current coupling uniformity corresponding to the current structural data. If the coupling coefficients of all measurement points are close, it indicates that the coupling uniformity is high. Then, the current coupling coefficient is compared with the current coupling coefficient, and the current coupling uniformity is compared with the current coupling uniformity to adjust the structural data of the second protruding area.

[0067] Optionally, the core structure data can be determined based on the bottom region, the first protruding region, and the second protruding region. Specifically, this may include: determining the vertex position of the second protruding region according to the number of phases; and determining the core structure data based on the bottom region, the first protruding region, and the second protruding region, combined with the vertex position of the second protruding region.

[0068] For example, the pointing direction of each vertex in the second protruding region can be determined according to the parity of the phase number, the position coordinates of each vertex can be determined according to the direction, and the overall magnetic core structure data can be obtained by combining the bottom region and the first protruding region.

[0069] Optionally, the vertex position of the second protruding region can be determined based on the phase number. Specifically, if the phase number is odd, the vertex position of the second protruding region can be determined based on the midpoint of the side length of the bottom region; if the phase number is even, the vertex position of the second protruding region can be determined based on the vertex of the bottom region.

[0070] For example, based on the number of inductor phases, there are two cases: odd-numbered phases and even-numbered phases. When the number of inductor phases is odd: the vertices of the second protruding region are arranged on the same straight line as the midpoints of the opposite sides of the bottom region; when the number of inductor phases is even: the vertices of the second protruding region are arranged on the same straight line as the vertices of the bottom region, such as... Figure 2 , 3 As shown, planar schematic diagrams of four-phase and six-phase coupled inductors are presented respectively.

[0071] Optionally, step 103 may specifically include: determining the winding structure data corresponding to the inductor based on the inductance value and DC resistance impedance requirements in the design parameter data.

[0072] The winding structure data may include, but is not limited to, material, number of turns, wire diameter, and groove angle. The DC resistance requirement refers to the resistance value presented by the inductor to the DC current passing through its winding under its operating conditions. For example, based on the inductance value and the resistance corresponding to the DC resistance requirement, the winding material, such as copper wire, is selected, and then the winding structure data is determined by combining factors such as the resistivity of the material and the winding method.

[0073] Optionally, based on the inductance value and DC resistance impedance requirements in the design parameter data, the winding structure data corresponding to the inductor can be determined. Specifically, this may include: determining the winding arrangement area in the magnetic core based on the magnetic core structure data; and determining the winding structure data based on the inductance value and DC resistance impedance requirements, combined with the winding arrangement area.

[0074] In some embodiments, the winding arrangement may include, but is not limited to, same-side arrangement and opposite-side arrangement, which can be selected according to the power supply method, thereby forming a power module based on the horizontal or vertical direction, realizing the flow of current in the horizontal or vertical direction, so as to facilitate the design of the power module. Same-side arrangement means that the copper wire inlet and outlet are located on the same side, i.e., on the same plane, which is convenient for horizontal layout; opposite-side arrangement means that the copper wire inlet and outlet are located on opposite sides, i.e., on different planes, which is convenient for vertical layout. The shape of the winding arrangement area (such as the copper wire arrangement area) may include, but is not limited to, rectangle, arc, etc., which can be selected and designed according to DC resistance requirements and PCB soldering requirements.

[0075] For example, such as Figure 4 The diagram shows a planar schematic of a three-phase coupled inductor, including a bottom core view and a top core view. The bottom core may include a first protruding area (core protruding area 1), a second protruding area (core protruding area 2), and a copper wire arrangement area. The copper wire arrangement area includes arrangement area 1 opening, arrangement area 2 opening, and arrangement area 3 opening. Core protruding area 1 is arc-shaped to ensure that the winding (which may be called copper wire, coil, or copper coil) has the maximum path length to ensure a high inductance. Core protruding area 2 is located at the center of the core and has a centrally symmetrical structure, which can shorten the magnetic path from phase A to phases B and C, thereby increasing the inductance and interphase coupling coefficient, and also has the function of balancing the magnetic circuits of each phase.

[0076] Specifically, when using a same-side arrangement, the copper wire can enter from arrangement area 1, wind around the iron core protrusion area 1, and exit from arrangement area 2. The remaining phase windings are arranged similarly, ensuring that the copper wire entry and exit points are on the same plane, facilitating module design in the horizontal direction. Alternatively, when using a different-side arrangement, the copper wire can enter from arrangement area 1, wind around the iron core protrusion area 1, and exit from the top arrangement area 3. The remaining phase windings are arranged similarly, ensuring that the copper wire entry and exit points are on different planes, i.e., the copper wire enters from the bottom and exits from the top, facilitating module design in the vertical direction. Correspondingly, the copper wire can be wound uniformly clockwise or counterclockwise along the iron core protrusion area 1. The magnetic flux originates from the iron core protrusion area 1 of a certain phase, is transmitted through the iron core, and then reverses direction into the iron core protrusion areas of other phases, thus achieving reverse coupling.

[0077] Optionally, the core structure data of the bottom core of the inductor can be determined based on the design parameter data and the preset symmetrical core shape rules; it can be determined whether the bottom core of the inductor is symmetrical with the top core of the inductor; if the bottom core of the inductor is symmetrical with the top core of the inductor, the core structure data corresponding to the top core of the inductor is determined to be the same as the core structure data corresponding to the bottom core of the inductor; if the bottom core of the inductor is not symmetrical with the top core of the inductor, the core structure data corresponding to the top core of the inductor is determined based on the bottom region of the bottom core of the inductor; based on the core structure data corresponding to the bottom core of the inductor and the core structure data corresponding to the top core of the inductor, the core structure data corresponding to the inductor is determined.

[0078] In some embodiments, the magnetic core of a multiphase inductor may include a bottom magnetic core and a top magnetic core, which are interlocked and a multiphase winding is placed between the two cores to form a multiphase inductor. If the top and bottom magnetic cores are symmetrical, and the bottom magnetic core is an equilateral triangle with a protruding area, then the top magnetic core is also an equilateral triangle with a protruding area. If the top and bottom magnetic cores are asymmetrical, the planar structure corresponding to the bottom region of the bottom magnetic core can be determined as the structure of the top magnetic core. For example, if the bottom magnetic core is an equilateral triangle with a protruding area, then the top magnetic core is an equilateral triangle without a protruding area, and can be a thin, complete iron core plane.

[0079] For example, such as Figure 5 The diagram shows an exploded view of a five-phase symmetrical coupled inductor. When the core material is ferrite, it can be called an iron core. The inductor includes a top iron core, a bottom iron core, and multi-phase windings. The top and bottom iron cores are symmetrical in structure, each including an iron core protrusion area 1 and an iron core protrusion area 2. The copper coils are wound on opposite sides, and the copper wire arrangement area is an arc-shaped groove. That is, the current enters from the bottom of the inductor, winds around the iron core protrusion area 1, and then exits from the top of the inductor. This form is more conducive to realizing modular power supply. For clarity, only two phase windings are shown in the figure, and the iron core protrusion area 2 is not shown.

[0080] It should be noted that the number of phases of the inductor, the winding method of the copper coil, the snapping method of the top magnetic core and the bottom iron core, and the copper wire arrangement area can all be arbitrarily selected, thereby combining inductors with different structures.

[0081] As one possible implementation method, such as Figure 6 As shown, the steps may include the following:

[0082] 1) Determine the core shape based on the number of coupled inductance phases X. For phase X, a regular X-gon structure is selected.

[0083] 2) Determine the side length l and height h1 based on the required inductance value L, number of phases X, etc., such as Figure 7 As shown;

[0084] 3) Determine the coil material, number of turns N, wire diameter d, and groove angle α based on the DC resistance (DCR) requirements and inductance value;

[0085] 4) Select a suitable core material based on the power switching frequency and magnetic permeability;

[0086] 5) Select the appropriate radius r and height h2 of the protruding area 1 of the iron core, and fine-tune the inductance value to achieve the required precise inductance value;

[0087] 6) Design appropriate side length m, width n and height h3 of the protruding area 2 of the iron core to adjust the coupling coefficient and coupling uniformity between phases so that the adjusted inductance achieves the expected coupling effect.

[0088] This approach enables the structural design of multi-phase symmetrical reverse-coupled inductors, achieving high integration. It allows for the integrated design of multi-phase Buck step-down circuits, improving power density and efficiency. It is suitable for both planar and vertical layouts, facilitating the design of power modules.

[0089] For example, the inductor can be arranged in a planar layout, with the inductor coil inlet and outlet located on the same side, allowing the current to flow horizontally, such as... Figure 8 As shown, the output bus layout of a four-phase inductor is illustrated. Multiple four-phase coupled inductors form a multi-phase parallel output. The voltage input line is connected from both sides of the inductor, and the output bus is formed by horizontal lines from the center of each inductor. The output bus can be coated with thicker copper, which greatly reduces the loss of the current path.

[0090] Accordingly, during the integration of power modules, they can be assembled horizontally or vertically to allow current to flow in either direction. Specifically, there are two forms of inductor integration in power modules: one where the inductor is located at the bottom of the power module, and the other where the inductor is located at the top of the power module.

[0091] For example, such as Figure 9As shown, the power module can adopt a PCB-inductor-Metal-Oxide-Semiconductor (MOS) structure. The MOS transistor is located on top of the multiphase coupled inductor. Since the MOS transistor needs to be soldered to the PCB, a top PCB needs to be added above the multiphase coupled inductor to transmit current and signals. The current input flows from the bottom PCB to the top PCB and then further into the MOS transistor. Subsequently, the current returns from the top PCB through transmission lines to the bottom PCB and flows further into the inductor. The inductor output current is also located on the bottom PCB, and the inductor current flows within the same PCB. In this way, the MOS transistor can be placed at the very top of the module, and the heat sink can be directly installed on top of the MOS transistor, which is beneficial for overall heat dissipation from the top. The overall structure of the module is relatively simple to implement, improving the module integration efficiency.

[0092] For example, such as Figure 10 As shown, the power module can adopt a PCB-MOSFET-Inductor structure, with the multiphase coupled inductor placed at the top of the module and the MOSFET located below it, using the bottom PCB as a carrier, eliminating the need for a top PCB. Current is directly transferred from the bottom PCB and MOSFET to the bottom of the inductor, while the output current flows out from the top of the inductor, converges via the output bus, and finally returns to the bottom PCB. Since the MOSFET is directly soldered to the bottom PCB, heat can be conducted to the bottom of the PCB through thermal vias. Adding a heatsink at the bottom allows for heat dissipation, enabling devices to dissipate heat from the bottom of the PCB. Furthermore, the orderly current transmission path eliminates the need for additional round-trip transmission lines, simplifying the module integration structure and reducing integration costs.

[0093] For example, such as Figure 11 As shown, a vertical power supply structure can be adopted, based on Figure 10 The structure described here allows for the design of a vertical power supply module. Since vertical power supply occupies space on the back of the chip, the original space for the back-side filter capacitors needs to be compressed. Some capacitors need to be integrated into the module, further reducing the module size by embedding them within the PCB. The MOSFET is located below the multiphase coupled inductor, with the bottom PCB serving as the carrier. Heat can be conducted to the bottom of the PCB through thermal vias, where a heatsink can be added to dissipate the heat. This structure eliminates the output bus, eliminating the need for current to return to the PCB. Power can be directly supplied vertically to chips such as the GPU, CPU, and Application Specific Integrated Circuit (ASIC) from the motherboard, shortening the power supply path, reducing losses, and improving the dynamic response of the power module. This approach achieves magnetic integration and heat dissipation design in the vertical direction, improving the efficiency and integration of the power module design.

[0094] Compared with existing technologies, the power module based on multi-phase symmetrical coupled inductor design in this embodiment eliminates the limitation of inductors on the shape of the power module. The module structure design is flexible and versatile, with higher integration. The magnetic core adopts a centrally symmetrical structure, with reverse coupling between each phase, achieving highly uniform coupling between each phase. This facilitates expansion when the number of phases increases, enabling three-phase, four-phase, five-phase, six-phase, and even more-phase coupled inductor integrated designs. By sharing a magnetic core, efficiency is maintained while saving inductor volume and increasing power density. Furthermore, the magnetic core has added a first protruding area and a second protruding area, which can balance the magnetic circuit between each phase while maintaining central symmetry, further improving the coupling symmetry between each phase.

[0095] This embodiment provides an inductor structure, such as Figure 12 As shown, the structure includes: a bottom magnetic core 11, a top magnetic core 12, and a winding 13; the magnetic core shapes of the top magnetic core 12 and the bottom magnetic core 11 satisfy a preset symmetrical magnetic core shape rule; the winding 13 is arranged between the top magnetic core 12 and the bottom magnetic core 11 to form an inductor.

[0096] Multiple windings 13 can be arranged between the top magnetic core 12 and the bottom magnetic core 11 according to the number of phases in the inductor's design parameters. The top magnetic core 12 and the bottom magnetic core 11 are fastened together to form a multi-phase coupled inductor. This symmetrical magnetic core shape makes the coupling between inductor phases more uniform, facilitates the adjustment of the inductor's structural parameters, reduces the design time of the inductor structure, and increases the convenience of expanding the number of inductor phases.

[0097] Optionally, the bottom magnetic core 11 may include a bottom region 111, a first protruding region 112, a second protruding region 113, and a winding arrangement region 114; the bottom region 111 is located at the bottom of the top magnetic core 12, and the number of sides of the bottom region 111 is the same as the number of inductor phases, and it is centrally symmetrical; the first protruding region 112 is distributed in the edge region above the bottom region 111 and is arc-shaped; the second protruding region 113 is located in the central region above the bottom region 111 and is centrally symmetrical; the winding 13 arrangement region is located in the bottom region 111 and matches the shape of the winding 13.

[0098] For example, if the number of phases of the coupled inductor is three, then an equilateral triangle is used as the core shape of the three-phase coupled inductor, that is, the shape of the bottom region 111 of the bottom core 11; a first protruding region 112 can be added above the bottom region 111 according to the number of phases, distributed on the edge region of the bottom region 111, and is arc-shaped, so as to facilitate the adjustment of the inductance value; a second protruding region 113 can be added above the bottom region 111 according to the number of phases, so as to facilitate the adjustment of the coupling coefficient and coupling uniformity of the inductor, and is a centrally symmetrical shape; the winding arrangement region 114 can be located in the bottom region 111, in the form of a rectangular or arc-shaped groove, selected according to the arrangement of the windings 13, such as: same-side arrangement, opposite-side arrangement, to match the shape of the windings 13, so that the top core can be engaged with the bottom core 11.

[0099] Optionally, the vertex of the second protruding region 113 is on the same straight line as the midpoint of the bottom edge of the bottom region 111; or, the vertex of the second protruding region 113 is on the same straight line as the vertex of the bottom region 111.

[0100] For example, when the number of inductor phases is odd, the vertices of the second protruding region 113 and the midpoints of the opposite sides of the bottom region 111 can be arranged on the same straight line; when the number of inductor phases is even, the vertices of the second protruding region 113 and the vertices of the bottom region 111 can be arranged on the same straight line.

[0101] Optionally, the top magnetic core 12 adopts a symmetrical structure, which is the same as the structure of the bottom magnetic core 11; or, the top magnetic core 12 adopts a planar structure, which is the same as the structure of the bottom region 111 of the bottom magnetic core 11.

[0102] Optionally, the core structure of the top core 12 can be determined based on the inductor's design parameters and a preset symmetrical core shape rule. It can be a symmetrical structure, identical to the bottom core 11, or a planar structure, where the bottom region 111 of the bottom core 11 has the same structure and no protruding area. For example, if a symmetrical structure is used, the bottom core 11 is an equilateral triangle with a protruding area, and the top core 12 is also an equilateral triangle with a protruding area; if a planar structure is used, the bottom core 11 is a regular quadrilateral with a protruding area, and the top core 12 is a regular quadrilateral without a protruding area, and can be a thin, complete iron core plane, such as... Figure 13 As shown, the copper coil is wound on the same side, and the copper wire arrangement area is a rectangular area. That is, the current enters from the bottom of the inductor, winds around the first protruding area 112, and then exits from the bottom of the inductor. This form is more conducive to power supply on the same plane. For clarity, the second protruding area 113 is not shown in the figure.

[0103] It should be noted that the number of phases of the inductor, the winding method of the copper coils, the clamping method of the top and bottom magnetic cores, and the copper wire arrangement area can all be arbitrarily selected, thus combining inductors with different structures. This approach can meet various inductor design and application requirements, and facilitates improving the coupling uniformity of multiphase inductors.

[0104] Embodiments of this application also provide an apparatus for determining the inductor structure, as... Figure 1 The specific implementation of the method shown is as follows: Figure 14 As shown, the device includes: an acquisition module 31 and a determination module 32.

[0105] The acquisition module 31 is configured to acquire the design parameter data of the inductor;

[0106] The determination module 32 is configured to determine the core structure data corresponding to the inductor based on the design parameter data and the preset symmetrical core shape rules;

[0107] Module 32 is configured to determine the winding structure data corresponding to the inductor based on the design parameter data;

[0108] Module 32 is configured to determine the structure of the inductor based on winding structure data and core structure data.

[0109] In some examples of this embodiment, the determining module 32 is specifically configured to determine the core shape corresponding to the inductor based on the number of phases in the design parameter data and the preset symmetrical core shape rules; and to determine the core structure data corresponding to the inductor based on the inductance value and coupling coefficient in the design parameter data, combined with the core shape.

[0110] In some examples of this embodiment, the determining module 32 is further configured to determine the shape of the magnetic core as a regular polygon based on the rules of symmetrical magnetic core shape, and to determine the number of sides of the regular polygon based on the number of phases.

[0111] In some examples of this embodiment, the determining module 32 is specifically configured to determine the bottom region corresponding to the magnetic core based on the inductance value and the shape of the magnetic core; determine the first protruding region corresponding to the magnetic core based on the inductance value, wherein the first protruding region is the edge region above the bottom region; determine the second protruding region corresponding to the magnetic core based on the coupling coefficient, wherein the second protruding region is the center region above the bottom region; and determine the magnetic core structure data based on the bottom region, the first protruding region and the second protruding region.

[0112] In some examples of this embodiment, the determining module 32 is further configured to obtain the current inductance value corresponding to the magnetic core;

[0113] The first prominent area is determined by comparing the current inductance value with the previous inductance value.

[0114] In some examples of this embodiment, the determining module 32 is specifically configured to determine a second protruding region based on the coupling coefficient and the coupling uniformity in the design parameter data, the second protruding region having a centrally symmetrical structure.

[0115] In some examples of this embodiment, the determining module 32 is specifically configured to obtain the current coupling coefficient and the current coupling uniformity corresponding to the magnetic core; and to determine the second protruding region by comparing the current coupling coefficient with the current coupling uniformity and the current coupling uniformity with the current coupling uniformity.

[0116] In some examples of this embodiment, the determining module 32 is specifically configured to determine the vertex position of the second protruding region based on the number of phases; and to determine the core structure data based on the bottom region, the first protruding region, and the second protruding region, combined with the vertex position of the second protruding region.

[0117] In some examples of this embodiment, the determining module 32 is specifically configured to determine the vertex position of the second protruding region based on the midpoint of the side length of the bottom region if the phase number is odd; and to determine the vertex position of the second protruding region based on the vertex of the bottom region if the phase number is even.

[0118] In some examples of this embodiment, the determining module 32 is specifically configured to determine the winding structure data corresponding to the inductor based on the inductance value and DC resistance impedance requirements in the design parameter data.

[0119] In some examples of this embodiment, the determining module 32 is specifically configured to determine the winding arrangement area in the magnetic core based on the magnetic core structure data; and to determine the winding structure data based on the inductance value and DC resistance impedance requirements, combined with the winding arrangement area.

[0120] In some examples of this embodiment, the determining module 32 is specifically configured to: determine the core structure data of the bottom core of the inductor based on design parameter data and a preset symmetrical core shape rule; determine whether the bottom core of the inductor is symmetrical with the top core of the inductor; if the bottom core of the inductor is symmetrical with the top core of the inductor, then determine that the core structure data corresponding to the top core of the inductor is the same as the core structure data corresponding to the bottom core of the inductor; if the bottom core of the inductor is not symmetrical with the top core of the inductor, then determine the core structure data corresponding to the top core of the inductor based on the bottom region of the bottom core of the inductor; and determine the core structure data corresponding to the inductor based on the core structure data corresponding to the bottom core of the inductor and the core structure data corresponding to the top core of the inductor.

[0121] It should be noted that other corresponding descriptions of the functional units involved in the inductor structure determination device provided in this embodiment can be found in [reference]. Figure 1 The corresponding description in [the document] will not be repeated here.

[0122] Based on the above, Figure 1 Accordingly, this embodiment also provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the above-described method. Figure 1 The method shown.

[0123] Based on the above, Figure 1 Accordingly, this embodiment also provides a computer program product having a computer program stored thereon, which, when executed by a processor, implements the above-described method. Figure 1 The method shown.

[0124] Based on this understanding, the technical solution of this application can be embodied in the form of a software product, which can be stored in a non-volatile storage medium (such as CD-ROM, USB flash drive, mobile hard drive, etc.) and includes several instructions to cause a computer device (such as personal computer, server, or network device, etc.) to execute the methods of various implementation scenarios of this application.

[0125] Based on the above, Figure 1 The method shown, and Figure 14 To achieve the above objectives, the present application also provides an electronic device, such as a personal computer or a server, in the illustrated virtual device embodiment. This device includes a storage medium and a processor; the storage medium stores a computer program; the processor executes the computer program to implement the above-described virtual device. Figure 1 The method shown.

[0126] In some embodiments, the aforementioned physical device may further include a user interface, a network interface, a camera, radio frequency (RF) circuitry, sensors, audio circuitry, a Wi-Fi module, etc. The user interface may include a display screen, an input unit such as a keyboard, etc., and optionally, a USB interface, a card reader interface, etc. In some embodiments, the network interface may include a standard wired interface, a wireless interface (such as a Wi-Fi interface), etc.

[0127] Those skilled in the art will understand that the physical device structure provided in this embodiment does not constitute a limitation on the physical device, and may include more or fewer components, or combine certain components, or have different component arrangements.

[0128] The storage medium may also include an operating system and a network communication module. The operating system is a program that manages the hardware and software resources of the aforementioned physical device, supporting the operation of information processing programs and other software and / or programs. The network communication module is used to enable communication between the various components within the storage medium, as well as communication with other hardware and software in the information processing physical device.

[0129] Through the above description of the embodiments, those skilled in the art can clearly understand that this application can be implemented by means of software plus necessary general-purpose hardware platforms, or it can be implemented by hardware. By applying the solution of this embodiment, compared with the existing technology, the power module based on the multi-phase symmetrical coupled inductor design in this embodiment gets rid of the limitation of the inductor on the shape of the power module. The module structure design is flexible and versatile, with higher integration. The magnetic core adopts a centrally symmetrical structure, and each phase is coupled in reverse, realizing highly uniform coupling between each phase. It is convenient to expand when the number of phases increases, and can realize the integrated design of three-phase, four-phase, five-phase, six-phase and even more phase coupled inductors. Each phase shares a magnetic core, which saves inductor volume while maintaining efficiency and improving power density. In addition, the magnetic core adds a first protruding area and a second protruding area, which can balance the magnetic circuit between each phase while maintaining central symmetry, further improving the coupling symmetry between each phase.

[0130] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0131] The above are merely specific embodiments of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to these embodiments, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A method of determining an inductance structure, characterized by, The method comprises: obtaining design parameter data of an inductor; determining magnetic core structure data corresponding to the inductor according to the design parameter data and a preset symmetrical magnetic core shape rule, wherein the design parameter data is obtained based on actual inductor design requirements, the inductor design requirements at least including power supply integration requirements, inductor arrangement modes and winding arrangement modes, the inductor being a multi-phase coupling inductor, the winding arrangement modes being selected based on power supply modes, at least including same-side arrangement and different-side arrangement, the same-side arrangement being that the copper wire inlet and outlet are located in the same plane, and the different-side arrangement being that the copper wire inlet and outlet are located in different planes; determining winding structure data corresponding to the inductor according to the design parameter data; determining the structure of the inductor based on the winding structure data and the magnetic core structure data; wherein the determination of the magnetic core structure data corresponding to the inductor according to the design parameter data and the preset symmetrical magnetic core shape rule comprises: determining the magnetic core shape to be a regular polygon according to the preset symmetrical magnetic core shape rule, and determining the number of sides of the regular polygon according to the number of phases in the design parameter data; determining a bottom area corresponding to the magnetic core according to the inductor value and the magnetic core shape in the design parameter data; determining a first protruding area corresponding to the magnetic core according to the inductor value, the first protruding area being an edge area above the bottom area; determining a second protruding area corresponding to the magnetic core according to the coupling coefficient and the coupling uniformity in the design parameter data, the second protruding area being a center area above the bottom area, wherein the shape of the second protruding area is a center-symmetrical figure, the number of side lengths of the center-symmetrical figure being determined according to the number of phases, and the vertex position of the second protruding area being determined based on the number of phases; determining the magnetic core structure data based on the bottom area, the first protruding area and the second protruding area.

2. The method of claim 1, wherein, The determination of the first protruding area corresponding to the magnetic core according to the inductor value comprises: obtaining a current inductor value corresponding to the magnetic core; determining the first protruding area by comparing the current inductor value with the inductor value.

3. The method of claim 1, wherein, The determination of the second protruding area based on the coupling coefficient and the coupling uniformity in the design parameter data comprises: obtaining a current coupling coefficient and a current coupling uniformity corresponding to the magnetic core; determining the second protruding area by comparing the current coupling coefficient with the coupling coefficient and the current coupling uniformity with the coupling uniformity.

4. The method of claim 1, wherein, The determination of the magnetic core structure data based on the bottom area, the first protruding area and the second protruding area comprises: determining the vertex position of the second protruding area according to the number of phases; determining the magnetic core structure data based on the bottom area, the first protruding area and the second protruding area, and combining the vertex position of the second protruding area.

5. The method of claim 4, wherein, The determination of the vertex position of the second protruding area according to the number of phases comprises: if the number of phases is odd, determining the vertex position of the second protruding area according to the midpoint of the side length of the bottom area. If the number of phases is even, the top position of the second protruding region is determined according to the top of the bottom region.

6. The method of claim 1, wherein, The winding structure data corresponding to the inductor is determined according to the design parameter data, including: The winding structure data corresponding to the inductor is determined according to the inductance value and the DC resistance impedance requirement in the design parameter data.

7. The method of claim 6, wherein, The winding structure data corresponding to the inductor is determined according to the inductance value and the DC resistance impedance requirement in the design parameter data, including: The winding arrangement region in the magnetic core is determined according to the magnetic core structure data; The winding structure data is determined according to the inductance value and the DC resistance impedance requirement, and in combination with the winding arrangement region.

8. An inductive structure, characterized by Including: The bottom magnetic core, the top magnetic core and the winding; The magnetic core shape of the top magnetic core and the bottom magnetic core meets the preset symmetric magnetic core shape rule; wherein the design parameter data of the inductor structure corresponding to the inductor is obtained based on the actual inductor design requirement, and the inductor design requirement at least includes power supply integration requirement, inductor arrangement mode and winding arrangement mode, and the inductor is a multi-phase coupling inductor; the winding arrangement mode is selected based on the power supply mode, at least including same side arrangement and different side arrangement; the same side arrangement is that the copper line inlet and outlet are located in the same plane, and the different side arrangement is that the copper line inlet and outlet are located in different planes; The winding is arranged between the top magnetic core and the bottom magnetic core to form an inductor; The bottom magnetic core includes a bottom region, a first protruding region and a second protruding region; The bottom region is located at the bottom of the top magnetic core, and the number of edges of the bottom region is the same as the number of phases of the inductor, and is in a central symmetric shape; The first protruding region is located in the edge region above the bottom region, and is in a circular arc shape; The second protruding region is located in the central region above the bottom region, and is in a central symmetric shape; The magnetic core structure data corresponding to the inductor is determined according to the design parameter data and the preset symmetric magnetic core shape rule; The process of determining the magnetic core structure data corresponding to the inductor according to the design parameter data and the preset symmetric magnetic core shape rule is: The magnetic core shape is determined as a regular polygon according to the preset symmetric magnetic core shape rule, and the number of edges of the regular polygon is determined according to the number of phases in the design parameter data; The bottom region corresponding to the magnetic core is determined according to the inductance value and the magnetic core shape in the design parameter data; The first protruding region corresponding to the magnetic core is determined according to the inductance value; The second protruding region corresponding to the magnetic core is determined according to the coupling coefficient and the coupling uniformity in the design parameter data; wherein the number of edge lengths of the central symmetric pattern is determined according to the number of phases; and the top position of the second protruding region is determined based on the number of phases; The magnetic core structure data is determined based on the bottom region, the first protruding region and the second protruding region.

9. The structure of claim 8, wherein The bottom magnetic core further includes a winding arrangement region; The winding arrangement region is located in the bottom region and matches the winding shape.

10. The structure of claim 9, wherein The top point of the second protruding area is in a same straight line with the middle point of the bottom edge of the bottom area; or The top point of the second protruding area is in a same straight line with the top point of the bottom area.

11. The structure of claim 8, wherein The top magnetic core adopts a symmetric structure, which is the same as the structure of the bottom magnetic core; or The top magnetic core adopts a planar structure, which is the same as the structure of the bottom area of the bottom magnetic core.

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