Search

CN-121983413-A - High-frequency low-loss transformer based on amorphous alloy magnetic core and staggered winding

CN121983413ACN 121983413 ACN121983413 ACN 121983413ACN-121983413-A

Abstract

The invention discloses a high-frequency low-loss transformer based on an amorphous alloy magnetic core and a staggered winding, which belongs to the technical field of planar transformers. According to the invention, the primary winding units and the secondary winding units are distributed in a staggered manner in a hierarchy, the diameters of the primary winding units and the secondary winding units are also differentiated by adopting the size diameters, so that a flow channel is formed between the winding units which are adjacent upwards, and the flow channel is connected in series to form a spiral heat dissipation channel by arranging the blocking parts and the overflow holes which are distributed spirally, so that the self-circulation is formed based on the principle of thermal expansion and cold contraction, the temperature of the winding is effectively controlled, the problem that the saturation value of a magnetic core is influenced by the temperature to be reduced is effectively solved, and the high-frequency performance under the staggered winding is greatly improved.

Inventors

  • GAO CHENGPENG

Assignees

  • 庐江和润科技有限公司

Dates

Publication Date
20260505
Application Date
20260326

Claims (8)

  1. 1. The high-frequency low-loss transformer based on the amorphous alloy magnetic core and the staggered windings is characterized by comprising a magnetic core assembly (1), a winding mechanism (2) and a liquid cooling assembly (3), wherein the winding mechanism (2) is arranged in the magnetic core assembly (1), the winding mechanism (2) comprises annular staggered primary winding units (22) and secondary winding units (23), separation layers (21) are arranged between the winding units, the diameter of each primary winding unit (22) is larger than that of each secondary winding unit (23) so as to form a plurality of annular flow channels between the spaced winding units, blocking parts (27) of different flow channels are spirally distributed, overflow holes (28) are arranged between the winding units and the separation layers (21) so as to connect all the flow channels in series into spiral heat dissipation channels, and the liquid cooling assembly (3) comprises cooling boxes communicated with the upper end and the lower end of the heat dissipation channels.
  2. 2. The high-frequency low-loss transformer based on the amorphous alloy magnetic core and the staggered winding according to claim 1, wherein the magnetic core assembly (1) comprises a shell (11) which is mutually spliced, an arc-shaped first magnetic column (12) and a cylindrical second magnetic column (13) are arranged on the shell (11), a caulking groove (14) for accommodating a cooling box is formed between the first magnetic columns (12), and the shell (11), the magnetic columns and the cooling box form an annular winding space.
  3. 3. A high frequency low loss transformer based on amorphous alloy core and interleaved windings according to claim 1, wherein the flow path is divided into an inner flow path (24) and an outer flow path (25), the outer flow path (25) and the inner flow path (24) are each independently communicated into a spiral heat dissipation path, the outer flow path (25) is used for dissipating heat from the upper and lower surfaces of the primary winding unit (22), the inner flow path (24) is used for dissipating heat from the upper and lower surfaces of the secondary winding unit (23), and the cooling box comprises a second cooling box (32) communicating with the outer flow path (25) and a first cooling box (31) communicating with the inner flow path (24), and the area of the first cooling box (31) exposed outside the core assembly (1) is smaller than that of the second cooling box (32).
  4. 4. A high-frequency low-loss transformer based on an amorphous alloy magnetic core and a staggered winding as claimed in claim 3, wherein a cooling cavity (33) is arranged in the cooling box and close to the outside, the first cooling box (31) is respectively communicated with the uppermost inner runner (24) and the lowermost inner runner (24) through communicating pipes (35), and the inner side surface of the second cooling box (32) is provided with communicating holes (36) respectively communicated with the uppermost outer runner (25) and the lowermost outer runner (25).
  5. 5. The high-frequency low-loss transformer based on amorphous alloy magnetic cores and interleaved windings according to claim 4, wherein the first cooling box (31) and the second cooling box (32) are each provided with a heat sink (34) on the surface exposed outside the magnetic core assembly (1).
  6. 6. The high-frequency low-loss transformer based on amorphous alloy magnetic cores and interleaved windings according to claim 1, wherein the primary winding unit (22) and the secondary winding unit (23) each comprise a plurality of layers of insulating carrier sheets (2201), each layer of carrier sheets (2201) is provided with a copper foil winding (2202) of a vortex-like wire, and the overflow holes (28) are divided into a plurality of pieces and are arranged in gaps of the copper foil winding (2202) at intervals.
  7. 7. The high-frequency low-loss transformer based on amorphous alloy magnetic core and interleaved windings according to claim 6, wherein the copper foil windings (2202) of different layers are connected end to end by vias (2203) formed in the carrier sheet (2201) to form winding units, and the adjacent primary winding units (22) and the adjacent secondary winding units (23) are connected end to end by connecting posts (26).
  8. 8. A high frequency low loss transformer based on amorphous alloy core and interleaved windings according to claim 7, wherein the housing (11) is embedded with a pair of first connectors (15) and a pair of second connectors (16), two of said first connectors (15) being for connecting respectively uppermost and lowermost primary winding units (22) and two of said second connectors (16) being for connecting respectively uppermost and lowermost secondary winding units (23).

Description

High-frequency low-loss transformer based on amorphous alloy magnetic core and staggered winding Technical Field The invention relates to the field of planar transformers, in particular to a high-frequency low-loss transformer based on an amorphous alloy magnetic core and a staggered winding. Background The electronic device is commonly used in a miniature planar transformer, the planar transformer mainly comprises a magnetic core, a primary winding and a secondary winding, and in order to meet the flattening requirement, the planar transformer generally adopts a precise planar copper foil winding on a Printed Circuit Board (PCB) to replace an enameled wire which is wound in a three-dimensional way in the traditional transformer. In the prior art, based on the requirement of high frequency and low loss, the improvement is usually carried out by adopting an amorphous alloy magnetic core, compared with the traditional ferrite, the improvement can be realized by adopting a lower magnetic core loss and a higher saturation magnetic flux density, the improvement can be realized by adopting a distributed air gap, the influence range of diffusion magnetic flux can be effectively restrained, the improvement is realized by adopting a laminated staggered winding, the tight coupling of magnetic core windows is realized, thereby remarkably reducing leakage inductance and alternating current resistance, improving the energy transmission efficiency under high frequency, and the improvement is carried out by adopting a fourth mode that a winding copper sheet or copper foil tends to be flattened, increasing the heat dissipation area, preventing the saturation value of the magnetic core from being influenced by the excessive temperature and further influencing the high frequency performance of the magnetic core, and the defect is that even if the winding is flattened, the heat dissipation is slow due to the excessive number of staggered winding layers, and the saturation value of the magnetic core is influenced by the excessive temperature. Disclosure of Invention The invention aims to provide a high-frequency low-loss transformer based on an amorphous alloy magnetic core and a staggered winding, which solves the problem of heat dissipation of the traditional planar inductor. The invention realizes the above purpose through the following technical scheme: the utility model provides a high frequency low-loss transformer based on amorphous alloy magnetic core and staggered winding, includes magnetic core subassembly, sets up winding mechanism and liquid cooling subassembly in magnetic core subassembly, winding mechanism includes annular staggered stack's primary winding unit and secondary winding unit, and all is provided with the separate layer between the winding unit, the diameter of primary winding unit is greater than the secondary winding unit to form a plurality of annular runners between spaced winding unit, be provided with separation portion in the annular runner, the separation portion of different runners is the heliciform and distributes, be provided with the overflow hole between winding unit and the separate layer in order to establish ties into heliciform heat dissipation channel with each runner, liquid cooling subassembly includes the cooling box of intercommunication heat dissipation channel upper and lower extreme. As a preferred solution of the present invention, the magnetic core assembly includes a housing that is mutually spliced, an arc-shaped first magnetic pillar and a cylindrical second magnetic pillar are disposed on the housing, a caulking groove for accommodating the cooling box is formed between the first magnetic pillars, and the housing, the magnetic pillar and the cooling box form an annular winding space. As a preferable scheme of the invention, the flow channel is divided into an inner flow channel and an outer flow channel, the outer flow channel and the inner flow channel are respectively and independently communicated into a spiral heat dissipation channel, the outer flow channel is used for dissipating heat to the upper surface and the lower surface of the primary winding unit, the inner flow channel is used for dissipating heat to the upper surface and the lower surface of the secondary winding unit, the cooling box comprises a second cooling box communicated with the outer flow channel and a first cooling box communicated with the inner flow channel, the area of the first cooling box exposed outside the magnetic core assembly is smaller than that of the second cooling box, and the number of turns of the primary winding is higher than that of the secondary winding, so that the heat dissipation requirement of the primary winding is higher. As a preferable mode of the invention, the cooling box is provided with a cooling cavity near the outside, the first cooling box is respectively communicated with the uppermost inner runner and the lowermost inner runner through communicating pipes, a