CN-122025371-A - Magnetic element and power module

Abstract

The disclosure provides a magnetic element and a power module, and relates to the technical field of inductors. The power module comprises at least one magnetic element and n first switch units, wherein the magnetic element comprises a magnetic core, the magnetic core comprises a first surface and a second surface which are oppositely arranged, n first windings and m second windings which are arranged in the magnetic core, n is larger than or equal to m, each first winding is arranged adjacent to one second winding, the effective sectional area of each first winding is larger than that of each second winding, each first winding comprises a first end and a second end, the first end is used for leading out a first pin on the first surface, the second end of each first winding is used for leading out a second pin on the second surface, and n first switch units are arranged on the first surface and are electrically connected with the first pins of one first winding. The first switch unit and the magnetic element can be vertically stacked, so that the occupied area of the power module is reduced, and the power density is improved.

Inventors

• CHEN QUANGUANG
• ZHOU JINPING
• LIANG LE

Assignees

• 台达电子企业管理（上海）有限公司

Dates

Publication Date

20260512

Application Date

20241111

Claims (20)

1. 1. A magnetic element, comprising: a magnetic core, the magnetic core includes a first surface and a second surface which are oppositely arranged; and n first windings and m second windings disposed within the magnetic core; wherein n is an integer greater than or equal to m, m is an integer greater than or equal to 1; Each first winding is arranged adjacent to one second winding; The effective sectional area of each first winding is larger than that of each second winding; Each first winding comprises a first end and a second end, the first end of the first winding is used for leading out a first pin on the first surface, and the second end of the first winding is used for leading out a second pin on the second surface.
2. 2. The magnetic component of claim 1, wherein the length of the core in a first direction is L, the length of the core in a second direction is h, and the length of the core in a third direction is W, wherein the second direction is disposed perpendicular to the first surface of the core; wherein h is less than or equal to L and less than or equal to W, and the first direction is mutually perpendicular to the second direction and the third direction respectively.
3. 3. The magnetic element of claim 1, wherein the magnetic element comprises a first phase inductance unit and a second phase inductance unit; Wherein the first phase inductance unit comprises a first winding and a second winding; The second phase inductance unit comprises a first winding and a second winding.
4. 4. A magnetic element according to claim 3, characterized in that there is a tangential plane perpendicular to the first surface and that the tangential plane passes through the first winding of the first phase inductance unit and the second winding of the second phase inductance unit, in which tangential plane the shortest distance between the outer surface of the first winding of the first phase inductance unit and the outer surface of the first winding of the second phase inductance unit in a direction parallel to the first surface is d1 and the shortest distance between the outer surface of the first winding of the first phase inductance unit and the first edge of the magnetic element in a direction parallel to the first surface is d2; Wherein d1/d2 is more than or equal to 0.7; The first edge is an edge closest to the first winding of the first phase inductance unit among edges of the magnetic element connecting the first surface and the second surface in the tangential plane.
5. 5. A magnetic element according to claim 3, characterized in that the magnetic permeability of the core at least partly between the first phase inductance unit and the second phase inductance unit is higher than the magnetic permeability of the other parts of the core.
6. 6. A magnetic element according to claim 3, wherein there is a vertical plane perpendicular to the first surface; the first windings of the first phase inductance units and the first windings of the second phase inductance units are arranged in a projection staggered mode on the vertical plane.
7. 7. The magnetic element of claim 6, wherein a projected overlap ratio of the first winding and the second winding of the first phase inductance unit in the vertical plane is greater than or equal to 60%; The superposition ratio of the projection of the first winding and the second winding of the second phase inductance unit on the vertical plane is more than or equal to 60 percent.
8. 8. A magnetic element according to claim 3, characterized in that the first winding of the first phase inductance unit and the first winding of the second phase inductance unit are arranged adjacently.
9. 9. A magnetic element according to claim 3, characterized in that the second winding of the first phase inductance unit is electrically connected with the second winding of the second phase inductance unit.
10. 10. The magnetic component of claim 9, wherein the second winding of the first phase inductance unit is electrically connected with the second winding of the second phase inductance unit at a surface of the magnetic core.
11. 11. A magnetic component according to claim 3, wherein the core is figure 8, at least one of the first windings and the second winding disposed adjacent each of the first windings being disposed inside the figure 8 core.
12. 12. The magnetic component of claim 1, wherein the second winding disposed adjacent to each of the first windings is disposed inside the corresponding first winding.
13. 13. The magnetic element of claim 1, wherein each of the second windings includes a first end and a second end; The first end of each second winding forms a third pin on the first surface, and the second end of each second winding forms a fourth pin on the second surface; or, the first end and the second end of each second winding form the third pin and the fourth pin on the first surface respectively; Or, the first end and the second end of each of the second windings respectively form the third pin and the fourth pin on the second surface.
14. 14. The magnetic element of claim 1, wherein each of the first windings and each of the second windings are comprised of a conductor; The first winding and/or the second winding are/is respectively one conductor or are respectively formed by connecting a plurality of conductors in parallel.
15. 15. The magnetic component of claim 1, wherein the magnetic core is a powder core; the material of the powder core comprises at least one of nanocrystalline powder, amorphous powder, iron-nickel powder, iron-silicon aluminum powder, iron-silicon powder, iron powder and iron-nickel-molybdenum powder.
16. 16. The magnetic element of claim 1 further comprising a signal pin and a power pin; The signal pin and the power pin are integrated on the surface of the magnetic core.
17. 17. The magnetic component of claim 1, further comprising an insulating medium, signal pins, and power pins; wherein the magnetic core is embedded in the insulating medium to form a magnetic substrate; the signal pins are embedded in the insulating medium or are arranged on the surface of the insulating medium; the power pins are embedded in the insulating medium or are arranged on the surface of the insulating medium.
18. 18. The magnetic element of claim 17, wherein the magnetic element comprises at least two-phase inductive elements, the second windings of the at least two-phase inductive elements being electrically connected in the insulating medium or at a surface of the insulating medium.
19. 19. A power module, comprising: At least one magnetic element and k first switching units; the magnetic element comprises a magnetic core, a first winding, a second winding and a magnetic core, wherein the magnetic core comprises a first surface and a second surface which are oppositely arranged; Wherein a is an integer greater than or equal to b, b is an integer greater than or equal to 1, each first winding is arranged adjacent to one second winding, k is an integer greater than or equal to 1, and k is equal to a; The effective sectional area of each first winding is larger than that of each second winding; each first winding comprises a first end and a second end, the first ends of the first windings are used for leading out first pins on the first surface, and the second ends of the first windings are used for leading out second pins on the second surface; the k first switch units are arranged on the first surface of the magnetic core, and each first switch unit is electrically connected with a first pin led out from the first surface of the first winding.
20. 20. The power module of claim 19, wherein the magnetic element is embedded in an insulating medium to form a magnetic substrate; The magnetic substrate comprises a signal pin and a power pin; k first switch units are arranged on the magnetic substrate and are electrically connected with the magnetic substrate.

Description

Magnetic element and power module Technical Field The disclosure relates to the field of inductance technology, and in particular relates to a magnetic element and a power module. Background With the increasing working speeds of a Central Processing Unit (CPU), a Graphic Processing Unit (GPU) and various integrated chip ICs, the working current is increased, and the requirements of a voltage regulation module (VRM, voltage Regulator Module) for supplying power to the CPU, the graphic processing unit GPU and various integrated chip ICs in terms of power density, efficiency, dynamic performance and the like are increased, so that very high challenges are presented to the design of the VRM. In the voltage regulation module, the volume of the output inductor is always the highest in proportion, and meanwhile, the selection of the inductance of the inductor also directly influences the efficiency and dynamic performance of the whole VRM. At present, as the power of the GPU/CPU is gradually increased, the reserved area of the VRM module is further reduced, the output inductance is large in duty ratio, the reserved position of the VRM is limited, the output inductance is difficult to accommodate, and the power density of the VRM is low, so that higher requirements are put forward on the power density of the VRM module. It should be noted that the information disclosed in the above background section is only for enhancing understanding of the background of the present disclosure and thus may include information that does not constitute prior art known to those of ordinary skill in the art. Disclosure of Invention The disclosure provides a magnetic element and a power module, which at least overcome the problems that the output inductance is large in duty ratio, the VRM reserved position is limited, the output inductance is difficult to accommodate, and the power density of the VR M is low in a certain degree. Other features and advantages of the present disclosure will be apparent from the following detailed description, or may be learned in part by the practice of the disclosure. According to a first aspect of the present disclosure, there is provided a magnetic element comprising: a magnetic core, the magnetic core includes a first surface and a second surface which are oppositely arranged; and n first windings and m second windings disposed within the magnetic core; wherein n is an integer greater than or equal to m, m is an integer greater than or equal to 1; Each first winding is arranged adjacent to one second winding; The effective sectional area of each first winding is larger than that of each second winding; Each first winding comprises a first end and a second end, the first end of the first winding is used for leading out a first pin on the first surface, and the second end of the first winding is used for leading out a second pin on the second surface. In some embodiments of the present disclosure, the length of the magnetic core in a first direction is L, the length of the magnetic core in a second direction is h, and the length of the magnetic core in a third direction is W, wherein the second direction is disposed perpendicular to the first surface of the magnetic core; wherein h is less than or equal to L and less than or equal to W, and the first direction is mutually perpendicular to the second direction and the third direction respectively. In some embodiments of the present disclosure, the magnetic element includes a first phase inductance unit and a second phase inductance unit; Wherein the first phase inductance unit comprises a first winding and a second winding; The second phase inductance unit comprises a first winding and a second winding. In some embodiments of the present disclosure, there is a tangential plane perpendicular to the first surface, and the tangential plane passes through the first winding of the first phase inductance unit and the second winding of the second phase inductance unit, and within the tangential plane, a shortest distance between an outer surface of the first winding of the first phase inductance unit and an outer surface of the first winding of the second phase inductance unit in a direction parallel to the first surface is d1, and a shortest distance between an outer surface of the first winding of the first phase inductance unit and a first edge of the magnetic element in a direction parallel to the first surface is d2; Wherein d1/d2 is more than or equal to 0.7; The first edge is an edge closest to the first winding of the first phase inductance unit among edges of the magnetic element connecting the first surface and the second surface in the tangential plane. In some embodiments of the present disclosure, the magnetic permeability of a magnetic core at least partially between the first phase inductance unit and the second phase inductance unit is higher than the magnetic permeability of other portions of the magnetic core. In some embodiments of the pres