CN-119786229-B - Magnetic integrated device and transducer

CN119786229BCN 119786229 BCN119786229 BCN 119786229BCN-119786229-B

Abstract

The application relates to a magnetic integrated device and a converter, wherein the magnetic integrated device comprises a first magnetic core, a second magnetic core, first magnetic columns, second magnetic columns, two first windings and two second windings, wherein the first magnetic core and the second magnetic core are arranged at intervals, the first magnetic columns, the second magnetic columns, the third magnetic columns, the fourth magnetic columns, the first windings, the second windings, the third magnetic columns and the fourth windings are fixedly connected between the first magnetic core and the second magnetic core, the area of the cross section of the first magnetic columns is equal to the area of the cross section of the second magnetic columns, the area of the cross section of the third magnetic columns is equal to the area of the cross section of the fourth magnetic columns, the area of the cross section of the first magnetic columns is different from the area of the cross section of the third magnetic columns, one first winding surrounds the first magnetic columns, the third magnetic columns, the other first winding surrounds the second magnetic columns, the fourth magnetic columns, the other first winding surrounds the third magnetic columns, and the other second windings surrounds the fourth magnetic columns. The magnetic integrated device has high integration level, and reduces the volume and the weight of the magnetic integrated device.

Inventors

TIAN JIASHEN
YANG CHENGSHANG
LONG YU
XU ZHICHENG
GAO JILIN
Qiu tianyi

Assignees

深圳市新凯来工业机器有限公司

Dates

Publication Date: 20260512
Application Date: 20250117

Claims (12)

1. The magnetic integrated device is characterized by comprising a first magnetic core, a second magnetic core, a first magnetic column, a second magnetic column, a third magnetic column, a fourth magnetic column, two first windings and two second windings; The first magnetic core and the second magnetic core are arranged at intervals, the first magnetic column, the second magnetic column, the third magnetic column and the fourth magnetic column are fixedly connected between the first magnetic core and the second magnetic core, and the first magnetic column to the fourth magnetic column are arranged at intervals; The cross-sectional area of the first magnetic pillar is equal to the cross-sectional area of the second magnetic pillar, the cross-sectional area of the third magnetic pillar is equal to the cross-sectional area of the fourth magnetic pillar, and the cross-sectional area of the first magnetic pillar is different from the cross-sectional area of the third magnetic pillar; one of the first windings surrounds the first magnetic pillar and the third magnetic pillar, the other of the first windings surrounds the second magnetic pillar and the fourth magnetic pillar, one of the second windings surrounds the third magnetic pillar, and the other of the second windings surrounds the fourth magnetic pillar; The actual area S3 of the cross section of the third magnetic pillar of the magnetic integrated device, the actual spacing L3 of the first magnetic pillar from the second magnetic pillar, and the actual spacing L4 of the first magnetic core from the second magnetic core satisfy that S3 is in the range of S3 M × (1+ -20%), L3 is in the range of L3 M × (1+ -20%), and L4 is in the range of L4 M × (1+ -20%; The S3 M 、L3 M and L4 M are calculated based on a minimum value of the volume V of the magnetic integrated device, wherein, V= Lc ×Wc× Hc, Lc=20.00 +20β , Wc=15β(Ap_T 0.50 /α) 0.50 +1+10.00Ap_L*α/[Ap_T 0.50 (α*Ap_T 0.50 ) 0.50 ]+10.00(α*Ap_T 0.50 ) 0.50 , Hc=10 /β+200α /(15β /2+0.5+10.00 ), =S3 M /(L3 M × L4 M ), = L3 M /L4 M , Ap_T + Ap_L =S3 M × L3 M × L4 M , Wherein V is the volume of the magnetic integrated device, lc is the length of the magnetic integrated device, wc is the width of the magnetic integrated device, hc is the height of the magnetic integrated device, α is a first structural factor, β is a second structural factor, S3 M is the calculated area of the cross section of the third magnetic pillar, L3 M is the calculated distance between the first magnetic pillar and the second magnetic pillar, L4 M is the calculated distance between the first magnetic core and the second magnetic core, ap_T is the magnetic core area product required by the transformer, and ap_L is the magnetic core area product required by the inductor.
2. The magnetic integrated device of claim 1, Ap_T=Pt× 10 4 /(B ac f T J*K f K u ), Ap_L=L*I L 2 /(B m J*K u ), Wherein Pt is apparent power of the transformer, B ac is working magnetic flux density of the transformer, f T is working frequency of the transformer, J is current density of windings of the magnetic integrated device, K f is working waveform coefficient, K u is winding window occupation coefficient, L is inductance of the inductor, I L is working current of the inductor, and B m is working magnetic flux density of the inductor.
3. The magnetic integrated device of claim 1 or 2, wherein the cross-sectional area of the first magnetic pillar is smaller than the cross-sectional area of the third magnetic pillar.
4. A magnetic integrated device as claimed in claim 1 or 2, wherein the first winding is a circuit board winding and the second winding is a wire wound winding.
5. The magnetic integrated device of claim 4, wherein a cross-sectional shape of the first magnetic pillar is the same as a cross-sectional shape of the second magnetic pillar, and a cross-sectional shape of the third magnetic pillar is the same as a cross-sectional shape of the fourth magnetic pillar.
6. The magnetic integrated device of claim 5, wherein the first magnetic pillar and the second magnetic pillar are each square pillars, and the third magnetic pillar and the fourth magnetic pillar are each racetrack pillars.
7. A magnetic integrated device as claimed in claim 1 or 2, wherein the magnetic integrated device is provided with an air gap; the air gap is positioned on the first magnetic column; or, the air gap is located on the second magnetic pillar; or, the air gap is located between the first magnetic pillar and the first magnetic core; or, the air gap is located between the first magnetic column and the second magnetic core; or, the air gap is located between the second magnetic pillar and the first magnetic core; or, the air gap is located between the second magnetic pillar and the second magnetic core.
8. The magnetic integrated device of claim 7, wherein a spacing of the air gap from the first winding in a first direction is greater than a threshold, the first direction being an alignment direction of the first magnetic core and the second magnetic core.
9. The magnetic integrated device according to claim 1 or 2, wherein the second winding includes a first sub-winding and a second sub-winding, a number of turns of the first sub-winding is the same as a number of turns of the second sub-winding, the first sub-winding and the second sub-winding are arranged in a first direction and connected in parallel, the first direction being an arrangement direction of the first magnetic core and the second magnetic core.
10. A magnetic integrated device as claimed in claim 1 or 2, wherein two of said first windings are connected in series or in parallel.
11. The magnetic integrated device of claim 1 or 2, wherein the magnetic flux of the first magnetic pillar on the third magnetic pillar is equal and opposite in magnitude to the magnetic flux of the second magnetic pillar on the third magnetic pillar, and the magnetic flux of the first magnetic pillar on the fourth magnetic pillar is equal and opposite in magnitude to the magnetic flux of the second magnetic pillar on the fourth magnetic pillar.
12. A converter comprising a primary circuit, a secondary circuit and a magnetic integrated device as claimed in any one of claims 1 to 11, the terminals of the primary circuit being connected to the terminals of the magnetic integrated device, the terminals of the secondary circuit being connected to the terminals of the magnetic integrated device.

Description

Magnetic integrated device and transducer Technical Field The invention relates to the technical field of power electronic magnetic integration, in particular to a magnetic integrated device and a converter. Background The double-active bridge converter can realize the electrical isolation of input and output, has the two-way processing capability of power, has the advantages of high power density, easy realization of soft switching, high efficiency and the like, can meet the requirements of various application occasions in a direct current power supply system, and has great application potential and development prospect. However, the double-active bridge converter has a large number of magnetic elements and large volume, and at present, the magnetic elements are magnetically integrated, but the integration level of the magnetic integrated device is low and the volume is still large. Disclosure of Invention The embodiment of the application provides a magnetic integrated device and a converter. The magnetic integrated device has high integration level, is beneficial to reducing the volume and the weight of the magnetic integrated device, and realizes the miniaturization and the light weight of the magnetic integrated device. In a first aspect, embodiments of the present application provide a magnetic integrated device. The magnetic integrated device comprises a first magnetic core, a second magnetic core, a first magnetic column, a second magnetic column, a third magnetic column, a fourth magnetic column, two first windings and two second windings, wherein the first magnetic core and the second magnetic core are arranged at intervals, the first magnetic column, the second magnetic column, the third magnetic column and the fourth magnetic column are fixedly connected between the first magnetic core and the second magnetic core, the first magnetic column and the fourth magnetic column are arranged at intervals, the area of the cross section of the first magnetic column is equal to the area of the cross section of the second magnetic column, the area of the cross section of the third magnetic column is equal to the area of the cross section of the fourth magnetic column, the area of the cross section of the first magnetic column is different from the area of the cross section of the third magnetic column, one winding surrounds the first magnetic column and the third magnetic column, the other winding surrounds the second magnetic column and the fourth magnetic column, and the other winding surrounds the second magnetic column and the fourth winding surrounds the fourth magnetic column. The magnetic integrated device in the embodiment of the application is the integration of an inductor and a transformer. It can be appreciated that the first magnetic pillar, the second magnetic pillar, the third magnetic pillar and the fourth magnetic pillar can be arranged in a matrix manner, which is beneficial to reducing the number of layers and turns of windings and reducing the volume and weight of the magnetic integrated device. Illustratively, the first and second magnetic columns are disposed adjacent, the third and fourth magnetic columns are disposed adjacent, the first and fourth magnetic columns may be disposed diagonally, and the second and third magnetic columns may be disposed diagonally. Any two magnetic columns of the first magnetic column, the second magnetic column, the third magnetic column and the fourth magnetic column are arranged at intervals. In the embodiment of the application, the area of the cross section of the first magnetic column is different from the area of the cross section of the third magnetic column by reasonably configuring, so that the number of turns of the inductance winding is consistent with the number of turns of the primary winding of the transformer, and the sharing of the inductance winding and the primary winding of the transformer, namely the sharing of the inductance winding and the primary winding of the transformer, in other words, the first winding is both the inductance winding and the primary winding of the transformer, and the sharing of the windings is realized, thereby being beneficial to reducing the volume of the windings so as to reduce the volume and the weight of the magnetic integrated device. The second winding is a secondary winding of the transformer. The magnetic integrated device in the embodiment of the application has high integration level, small volume and small weight. In one possible embodiment, the magnetic integrated device satisfies the following relationship: V=Lc×Wc×Hc, Wc＝15β(Ap_T0.50/α)0.50+1+10.00Ap_L*α/[Ap_T0.50(α*Ap_T0.50)0.50]+10.00(α*Ap_T0.50)0.50, Ap_T=Pt×104/(BacfTJ*KfKu), Ap_L=LIL2/(BmJ*Ku), α2=S3M/(L3M×L4M), β2=L3M/L4M, Ap_T+Ap_L=S3M×L3M×L4M, S3=S3M×(1±20%), L3=L3M×(1±20%), L4=L4M×(1±20%), Wherein V is the volume of the magnetic integrated device, lc is the length of the magnetic integrated device, wc is the width of the magnetic integ