Single-phase integrated magnetic element and three-phase integrated magnetic element

Abstract

The invention discloses a single-phase integrated magnetic element and a three-phase integrated magnetic element, and the magnetic core structure of the single-phase integrated magnetic element comprises a first magnetic side column, a second magnetic side column, an inductor magnetic cover, a transformer magnetic cover, a common magnetic core, an inductor magnetic column and a transformer magnetic column. The inductor magnetic cover and the transformer magnetic cover are arranged between the first magnetic side column and the second magnetic side column and are oppositely arranged; the common magnetic core is arranged between the inductor magnetic cover and the transformer magnetic cover; the inductor magnetic column is arranged between the inductor magnetic cover and the common magnetic core; the transformer magnetic column is arranged between the transformer magnetic cover and the common magnetic core; the winding directions of the first inductor winding and the second inductor winding on the inductor magnetic column and the winding directions of the first transformer primary winding and the second transformer primary winding on the transformer magnetic column are adjusted. Therefore, magnetic flux generated by common-mode current or differential-mode current flowing through the coupling inductor and the transformer on the common magnetic core is partially / completely counteracted.

Description

Technical Field

[0001] This invention relates to the field of electrical component technology, specifically to a single-phase integrated magnetic component and a three-phase integrated magnetic component. Background Technology

[0002] With the development of the new energy industry, improving the efficiency and power density of charging piles is extremely important. Separate inductors and transformers occupy a large volume, weight, and incur significant losses, and their wiring is complex and costly. Therefore, magnetic integration technology can be used to integrate inductors and transformers into a single magnetic core, reducing the overall size and losses of the magnetic components and improving the efficiency and power density of the converter.

[0003] In related technologies, the magnetic core loss of magnetic components integrated with inductors and transformers is relatively high, which affects the overall efficiency of the corresponding electrical equipment. Summary of the Invention

[0004] To solve the above-mentioned technical problems, the present invention provides a single-phase integrated magnetic element that can greatly reduce the size, weight and loss of the magnetic element, and improve the power density and power conversion efficiency of the converter.

[0005] The technical solution adopted in this invention is as follows:

[0006] A single-phase integrated magnetic component includes: a coupled inductor, a transformer with a center tap, and a magnetic core structure. The magnetic core structure includes: a first magnetic side post, a second magnetic side post, an inductor magnetic cover, a transformer magnetic cover, a common magnetic core, an inductor magnetic post, and a transformer magnetic post. The first magnetic side post and the second magnetic side post are arranged opposite to each other. The inductor magnetic cover and the transformer magnetic cover are disposed between the first magnetic side post and the second magnetic side post, and are arranged opposite to each other. The common magnetic core is disposed between the inductor magnetic cover and the transformer magnetic cover. The inductor magnetic post is disposed between the inductor magnetic cover and the common magnetic core. The transformer magnetic post is disposed between the transformer magnetic cover and the common magnetic core. The coupled inductor includes a first inductor winding and a second inductor winding. The primary side of the transformer includes a first transformer primary winding and a second transformer primary winding. The second end of the first inductor winding is connected to the first end of the first transformer primary winding, the second end of the first transformer primary winding is connected to the first end of the second transformer primary winding, and the second end of the second transformer primary winding is connected to the first end of the second inductor winding. The magnetic flux generated on the common core by the common-mode current or differential-mode current flowing through the coupled inductor and the transformer is partially or completely canceled out by adjusting the winding directions of the first and second inductor windings on the inductor core and the winding directions of the first and second transformer primary windings on the transformer core.

[0007] In one embodiment of the present invention, the magnetic flux generated on the common magnetic core by the differential mode current flowing through the first inductor winding and the second inductor winding is in the same direction, the magnetic flux generated on the common magnetic core by the differential mode current flowing through the primary winding of the first transformer and the primary winding of the second transformer is in the same direction, and the magnetic flux generated on the common magnetic core by the differential mode current flowing through the first inductor winding and the second inductor winding is opposite to the magnetic flux generated on the common magnetic core by the differential mode current flowing through the primary winding of the first transformer and the primary winding of the second transformer.

[0008] In one embodiment of the present invention, the common-mode current flowing through the first inductor winding and the second inductor winding generates magnetic flux in opposite directions on the common magnetic core, the inductor magnetic column, the first magnetic side column and the second magnetic side column, and the common-mode current flowing through the first transformer primary winding and the second transformer primary winding generates magnetic flux in opposite directions on the common magnetic core, the transformer magnetic column, the first magnetic side column and the second magnetic side column.

[0009] In one embodiment of the present invention, an inductor air gap is provided between the inductor magnetic column and the common magnetic core.

[0010] In one embodiment of the present invention, a transformer air gap is provided between the transformer magnetic column and the common magnetic core.

[0011] A three-phase integrated magnetic component includes: a first coupled inductor, a second coupled inductor, a third coupled inductor, a first transformer with a center tap, a second transformer with a center tap, a third transformer with a center tap, and a magnetic core structure. The magnetic core structure includes: a first magnetic side post, a second magnetic side post, an inductor magnetic cover, a transformer magnetic cover, a common magnetic core, a first inductor magnetic post, a second inductor magnetic post, a third inductor magnetic post, a first transformer magnetic post, a second transformer magnetic post, and a third transformer magnetic post. The first and second magnetic side posts are arranged opposite to each other. The inductor magnetic cover and the transformer magnetic cover are disposed between the first and second magnetic side posts and are arranged opposite to each other. The common magnetic core is disposed within the first and second magnetic side posts. Between the inductor magnetic cover and the transformer magnetic cover; the first inductor magnetic post, the second inductor magnetic post, and the third inductor magnetic post are respectively disposed between the inductor magnetic cover and the common magnetic core; the first transformer magnetic post, the second transformer magnetic post, and the third transformer magnetic post are respectively disposed between the transformer magnetic cover and the common magnetic core; the first coupling inductor includes a first inductor winding and a second inductor winding, the primary side of the first transformer includes a first transformer primary winding and a second transformer primary winding, wherein the second end of the first inductor winding is connected to the first end of the first transformer primary winding, and the second end of the first transformer primary winding is connected to the first end of the second transformer primary winding. The second transformer's primary winding is connected to the first end of the second inductor winding; the second coupling inductor includes a third inductor winding and a fourth inductor winding, and the primary side of the second transformer includes the primary windings of the third and fourth transformers, wherein the second end of the third inductor winding is connected to the first end of the primary winding of the third transformer, the second end of the primary winding of the third transformer is connected to the first end of the primary winding of the fourth transformer, and the second end of the primary winding of the fourth transformer is connected to the first end of the fourth inductor winding; the third coupling inductor includes a fifth inductor winding and a sixth inductor winding, and the primary side of the third transformer includes the primary winding of the fifth transformer and the sixth transformer. The primary winding of the transformer includes a fifth inductor winding, wherein the second end of the fifth inductor winding is connected to the first end of the fifth transformer primary winding, the second end of the fifth transformer primary winding is connected to the first end of the sixth transformer primary winding, and the second end of the sixth transformer primary winding is connected to the first end of the sixth inductor winding; wherein, by adjusting the winding directions of the first inductor winding and the second inductor winding on the first inductor core and the winding directions of the first transformer primary winding and the second transformer primary winding on the first transformer core, the magnetic flux generated on the common core by the common-mode current or differential-mode current flowing through the first coupled inductor and the first transformer is partially or completely canceled out;By adjusting the winding directions of the third and fourth inductor windings on the magnetic pillar of the second inductor, and the winding directions of the primary windings of the third and fourth transformers on the magnetic pillar of the second transformer, the magnetic flux generated on the common core by the common-mode or differential-mode current flowing through the second coupled inductor and the second transformer is partially or completely canceled out; by adjusting the winding directions of the fifth and sixth inductor windings on the magnetic pillar of the third inductor, and the winding directions of the primary windings of the fifth and sixth transformers on the magnetic pillar of the third transformer, the magnetic flux generated on the common core by the common-mode or differential-mode current flowing through the third coupled inductor and the third transformer is partially or completely canceled out.

[0012] A three-phase integrated magnetic component includes: a first coupled inductor, a second coupled inductor, a third coupled inductor, a first transformer with a center tap, a second transformer with a center tap, a third transformer with a center tap, and a magnetic core structure. The magnetic core structure includes: a first magnetic side post, a second magnetic side post, an inductor magnetic cover, a transformer magnetic cover, a first phase-to-phase common magnetic core, a second phase-to-phase common magnetic core, a first phase-to-phase common magnetic core, a second phase-to-phase common magnetic core, a third phase-to-phase common magnetic core, a first inductor magnetic column, a second inductor magnetic column, a third inductor magnetic column, a first transformer magnetic column, a second transformer magnetic column, and a third transformer magnetic column, wherein the first magnetic side post and the second magnetic side post are arranged opposite to each other; the inductor magnetic cover and... The transformer magnetic cover is disposed between the first magnetic side post and the second magnetic side post, and is arranged opposite to each other; the first phase-to-phase common magnetic core and the second phase-to-phase common magnetic core are respectively disposed between the inductor magnetic cover and the transformer magnetic cover; the first phase common magnetic core is disposed between the inductor magnetic cover and the first phase-to-phase common magnetic core, the second phase common magnetic core is disposed between the first phase-to-phase common magnetic core and the second phase-to-phase common magnetic core, and the third phase common magnetic core is disposed between the second phase-to-phase common magnetic core and the transformer magnetic cover; the first inductor magnetic post is disposed between the inductor magnetic cover and the first phase common magnetic core, and the second inductor magnetic post is disposed between the first phase-to-phase common magnetic core and the second phase common magnetic core. Between the common magnetic core and the second phase common magnetic core, the third inductor magnetic post is disposed between the second phase common magnetic core and the third phase common magnetic core; the first transformer magnetic post is disposed between the first phase common magnetic core and the first phase common magnetic core, the second transformer magnetic post is disposed between the second phase common magnetic core and the second phase common magnetic core, and the third transformer magnetic post is disposed between the third phase common magnetic core and the transformer magnetic cover; the first coupling inductor includes a first inductor winding and a second inductor winding, the primary side of the first transformer includes a first transformer primary winding and a second transformer primary winding, wherein the second end of the first inductor winding is connected to the first transformer... The first end of the primary winding of the first transformer is connected to the first end of the primary winding of the second transformer, and the second end of the primary winding of the second transformer is connected to the first end of the primary winding of the second inductor; the second coupling inductor includes a third inductor winding and a fourth inductor winding, and the primary side of the second transformer includes a third transformer primary winding and a fourth transformer primary winding, wherein the second end of the third inductor winding is connected to the first end of the primary winding of the third transformer, the second end of the primary winding of the third transformer is connected to the first end of the primary winding of the fourth transformer, and the second end of the primary winding of the fourth transformer is connected to the first end of the primary winding of the fourth inductor winding;The third coupling inductor includes a fifth inductor winding and a sixth inductor winding. The primary side of the third transformer includes a fifth transformer primary winding and a sixth transformer primary winding. The second end of the fifth inductor winding is connected to the first end of the fifth transformer primary winding, and the second end of the fifth transformer primary winding is connected to the first end of the sixth transformer primary winding. The second end of the sixth transformer primary winding is also connected to the first end of the sixth inductor winding. By adjusting the winding directions of the first and second inductor windings on the first inductor core and the winding directions of the first and second transformer primary windings on the first transformer core, the common-mode current or differential-mode current flowing through the first coupling inductor and the first transformer is generated on the first phase common core. The magnetic flux generated by the common-mode or differential-mode current flowing through the second coupled inductor and the second transformer is partially or completely canceled out. This is achieved by adjusting the winding directions of the third and fourth inductor windings on the second inductor's magnetic pillar and the primary windings of the third and fourth transformers on the second transformer's magnetic pillar. Similarly, by adjusting the winding directions of the fifth and sixth inductor windings on the third inductor's magnetic pillar and the primary windings of the fifth and sixth transformers on the third transformer's magnetic pillar, the magnetic flux generated by the common-mode or differential-mode current flowing through the third coupled inductor and the third transformer on the third phase's common magnetic core is also partially or completely canceled out.

[0013] In one embodiment of the present invention, the magnetic flux generated on the first phase common magnetic core by the differential-mode current flowing through the first inductor winding and the second inductor winding has the same direction, and the magnetic flux generated on the first phase common magnetic core by the differential-mode current flowing through the primary winding of the first transformer and the primary winding of the second transformer has the same direction. The magnetic flux generated on the first phase common magnetic core by the differential-mode current flowing through the first inductor winding and the second inductor winding has the same direction as the magnetic flux generated on the first phase common magnetic core by the differential-mode current flowing through the primary winding of the first transformer and the primary winding of the second transformer. The magnetic flux generated on the second phase common core is opposite in direction to the differential mode current flowing through the third and fourth inductor windings; the magnetic flux generated on the second phase common core by the differential mode current flowing through the primary windings of the third and fourth transformers is in the same direction as the magnetic flux generated on the second phase common core by the differential mode current flowing through the primary windings of the third and fourth transformers. The directions of the generated magnetic flux are opposite; the directions of the magnetic flux generated on the third-phase common magnetic core by the differential-mode current flowing through the fifth and sixth inductor windings are the same, and the directions of the magnetic flux generated on the third-phase common magnetic core by the differential-mode current flowing through the primary windings of the fifth and sixth transformers are the same. The magnetic flux directions are opposite; wherein, the magnetic flux direction generated by the differential mode current flowing through the first inductor winding and the second inductor winding on the first inductor column is the same as the magnetic flux direction generated by the differential mode current flowing through the fifth inductor winding and the sixth inductor winding on the third inductor column, and the magnetic flux direction generated by the differential mode current flowing through the first inductor winding and the second inductor winding on the first inductor column is opposite to the magnetic flux direction generated by the differential mode current flowing through the third inductor winding and the fourth inductor winding on the second inductor column.

[0014] The beneficial effects of this invention are:

[0015] This invention can significantly reduce the size, weight, and losses of magnetic components, and improve the power density and energy conversion efficiency of the converter. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a single-phase integrated magnetic element according to an embodiment of the present invention;

[0017] Figure 2This is a flow pattern of differential mode current in a single-phase integrated magnetic element according to an embodiment of the present invention;

[0018] Figure 3 This is a common-mode current flow pattern in a single-phase integrated magnetic element according to an embodiment of the present invention;

[0019] Figure 4 This is a front view of a single-phase integrated magnetic element according to an embodiment of the present invention;

[0020] Figure 5 This is a magnetic flux flow diagram caused by differential mode current in a single-phase integrated magnetic element according to an embodiment of the present invention;

[0021] Figure 6 This is a magnetic flux flow diagram caused by the common mode current in a single-phase integrated magnetic element according to an embodiment of the present invention;

[0022] Figure 7 This is a three-dimensional structural diagram of a three-phase integrated magnetic element according to an embodiment of the present invention;

[0023] Figure 8 This is a magnetic flux flow diagram caused by differential mode current in a three-phase integrated magnetic element according to an embodiment of the present invention;

[0024] Figure 9 This is a three-dimensional structural diagram of a three-phase integrated magnetic element according to another embodiment of the present invention;

[0025] Figure 10 This is a magnetic flux flow diagram caused by differential mode current in a three-phase integrated magnetic element according to another embodiment of the present invention. Detailed Implementation

[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] Figure 1 This is a schematic diagram of the structure of a single-phase integrated magnetic element according to an embodiment of the present invention.

[0028] like Figure 1 As shown, the single-phase integrated magnetic component of this embodiment may include: a coupled inductor 10, a transformer 20 with a center tap, and a magnetic core structure ( Figure 1 (Not specifically shown in the text).

[0029] The coupling inductor 10 may include a first inductor winding 11 and a second inductor winding 12. The primary side of the transformer 20 includes a first transformer primary winding 21 and a second transformer primary winding 22. The second end of the first inductor winding 11 is connected to the first end of the first transformer primary winding 21, the second end of the first transformer primary winding 21 is connected to the first end of the second transformer primary winding 22, and the second end of the second transformer primary winding 22 is connected to the first end of the second inductor winding 12.

[0030] It is understandable that, such as Figure 2 As shown, when differential mode current flows into a single-phase integrated magnetic component, the differential mode current flows in from the first end of the first inductor winding 11, and sequentially flows through the second end of the first inductor winding 11, the first end of the first transformer primary winding 21, the second end of the first transformer primary winding 21, the first end of the second transformer primary winding 22, the second end of the second transformer primary winding 22, the first end of the second inductor winding 12, and the second end of the second inductor winding 12. The differential mode current can also flow through the secondary winding of the transformer. Figure 3 As shown, when a common-mode current flows into a single-phase integrated magnetic component, the common-mode current flows in from the first end of the first inductor winding 11 and the second end of the second inductor winding 12, respectively. The common-mode current flowing in from the first end of the first inductor winding 11 flows sequentially through the second end of the first inductor winding 11, the first end of the primary winding 21 of the first transformer, and the second end of the primary winding 21 of the first transformer, and flows out from the center tap of the transformer. The common-mode current flowing in from the second end of the second inductor winding 12 flows sequentially through the first end of the second inductor winding 12, the second end of the primary winding 22 of the second transformer, and the first end of the primary winding 22 of the second transformer, and flows out from the center tap of the transformer. The common-mode current does not flow through the secondary winding of the transformer.

[0031] Among them, the first end of the first inductor winding 11 and the first end of the second inductor winding 12 are the same end, and the first end of the primary winding 22 of the first transformer and the first end of the primary winding 22 of the second transformer are the same end.

[0032] In one embodiment of the present invention, such as Figure 4 As shown, the magnetic core structure of this embodiment may include: a first magnetic side post 100, a second magnetic side post 200, an inductor magnetic cover 300, a transformer magnetic cover 400, a common magnetic core 500, an inductor magnetic post 600, and a transformer magnetic post 700.

[0033] The first magnetic side post 100 and the second magnetic side post 200 are arranged opposite to each other; the inductor magnetic cover 300 and the transformer magnetic cover 400 are arranged between the first magnetic side post 100 and the second magnetic side post 200, and are arranged opposite to each other; the common magnetic core 500 is arranged between the inductor magnetic cover 300 and the transformer magnetic cover 400; the inductor magnetic post 600 is arranged between the inductor magnetic cover 300 and the common magnetic core 500; and the transformer magnetic post 700 is arranged between the transformer magnetic cover 400 and the common magnetic core 500.

[0034] Specifically, by adjusting the winding direction of the first inductor winding 11 and the second inductor winding 12 on the inductor core 600, and the winding direction of the first transformer primary winding 21 and the second transformer primary winding 22 on the transformer core 700, the magnetic flux generated on the common core 500 by the common-mode current or differential-mode current flowing through the coupled inductor and the transformer is partially or completely canceled out.

[0035] Specifically, the inductor magnetic cover 300, the transformer magnetic cover 400, and the common magnetic core 500 can have the same or different shapes. The first inductor winding 11 and the second inductor winding 12 are wound inside the inductor window, the first transformer primary winding 21 and the second transformer primary winding 22 are wound inside the transformer window, and the common magnetic core 500 decouples the coupled inductor and the transformer.

[0036] In one embodiment of the present invention, it can be based on Figure 2 The diagram illustrates the flow direction of differential-mode current in a single-phase integrated magnetic component and the connection methods of the first inductor winding 11, the second inductor winding 12, the primary winding 21 of the first transformer, and the primary winding 22 of the second transformer. Adjusting the winding directions of the first inductor winding 11 and the second inductor winding 12 on the inductor core 600, and the winding directions of the primary windings 21 and 22 of the first transformer on the transformer core 700, ensures that the magnetic flux generated on the common core by the differential-mode current flowing through the first and second inductor windings is in the same direction, the magnetic flux generated on the common core by the differential-mode current flowing through the primary windings of the first and second transformers is in the same direction, and the magnetic flux generated on the common core by the differential-mode current flowing through the first and second inductor windings is opposite to the magnetic flux generated on the common core by the differential-mode current flowing through the primary windings of the first and second transformers.

[0037] Specifically, as one possible implementation, the winding direction of the first inductor winding 11 and the second inductor winding 12 on the inductor magnetic column 600 is the same as the winding direction of the first transformer primary winding 21 and the second transformer primary winding 22 on the transformer magnetic column 700. That is, the winding direction of the coupled inductor is the same as the winding direction of the transformer primary winding (specifically, a "one-line to the bottom" winding method can be used, a "double-wire parallel winding" winding method can be used, or they can be wound separately and then connected by copper busbars or PCBs, etc. The specific winding method is not limited in this invention). At this time, the direction of the magnetic flux generated in the magnetic core by the differential mode current flowing through the coupled inductor 10 and the transformer 20 is as follows: Figure 5 As indicated by the middle arrow, the differential-mode current flowing through the coupled inductor 10 and the transformer 20 partially or completely cancels out the magnetic flux generated in the common core.

[0038] Specifically, the magnetic flux generated in the common core by the differential-mode current flowing through the coupling inductor 10 can be expressed by the following formula:

[0039]

[0040] Where, Φ L I represents the magnetic flux generated in the common core by the differential-mode current flowing through the coupling inductor 10, and L represents the inductance of the first inductor winding 11 or the second inductor winding 12 (the inductances of the first inductor winding 11 and the second inductor winding 12 are the same). L N represents the differential-mode current flowing through the first inductor winding 11 and the second inductor winding 12. L This indicates the number of turns of the first inductor winding 11 or the second inductor winding 12 (the number of turns of the first inductor winding 11 or the second inductor winding 12 is the same).

[0041] The magnetic flux generated by the differential-mode current flowing through transformer 20 in the common magnetic core can be expressed by the following formula:

[0042]

[0043] Where, Φ T T represents the magnetic flux generated in the common core by the differential-mode current flowing through transformer 20. s The period of the induced electromotive force, u s N represents the induced electromotive force. s This indicates the number of turns in the secondary winding of the transformer (number 20).

[0044] Therefore, the magnetic flux generated in the common core by the differential-mode current flowing through the first inductor winding 11, the second inductor winding 12, and the transformer 20 can be expressed by the following formula:

[0045] Φ 公共磁芯 =Φ L -Φ T ,

[0046] Where, Φ 公共磁芯 This represents the magnetic flux generated by the differential-mode current flowing through the first inductor winding 11, the second inductor winding 12, and the transformer 20, after the magnetic flux generated by these currents in the common magnetic core cancels out.

[0047] Therefore, the magnetic flux generated by the differential-mode current flowing through the coupled inductor 10 and the transformer 20 on the common magnetic core 500 can be partially canceled. Preferably, by appropriately adjusting the windings of the first inductor winding 11, the second inductor winding 12, the primary winding 21 of the first transformer, and the primary winding 22 of the second transformer, the magnetic flux generated by the differential-mode current flowing through the coupled inductor 10 and the transformer 20 on the common magnetic core 500 can be completely canceled.

[0048] In another embodiment of the invention, it can be based on Figure 3 The common-mode current flow direction in the single-phase integrated magnetic element and the connection method of the first inductor winding 11, the second inductor winding 12, the first transformer primary winding 21, and the second transformer primary winding 22 are shown. By adjusting the winding direction of the first inductor winding 11 and the second inductor winding 12 on the inductor magnetic column 600 and the winding direction of the first transformer primary winding 21 and the second transformer primary winding 22 on the transformer magnetic column 700, the magnetic flux generated by the common-mode current flowing through the first inductor winding and the second inductor winding on the common magnetic core 500, the inductor magnetic column 600, the first magnetic side column 100, and the second magnetic side column 200 are opposite in direction. Similarly, the magnetic flux generated by the common-mode current flowing through the first transformer primary winding and the second transformer primary winding on the common magnetic core 500, the transformer magnetic column 700, the first magnetic side column 100, and the second magnetic side column 200 are opposite in direction.

[0049] Specifically, as one possible implementation, the winding directions of the first inductor winding 11 and the second inductor winding 12 on the inductor core 600 are the same as the winding directions of the first transformer primary winding 21 and the second transformer primary winding 22 on the transformer core 700. In this case, the direction of the magnetic flux generated in the core by the common-mode current flowing through the first inductor winding 11 and the second inductor winding 12, as well as the first transformer primary winding 21 and the second transformer primary winding 22, is as follows: Figure 6 As shown by the middle arrow, the magnetic flux generated by the common-mode current flowing through the first inductor winding 11 and the second inductor winding 12 on the common magnetic core 500, the inductor magnetic pillar 600, the first magnetic side pillar 100 and the second magnetic side pillar 200 is completely canceled. The magnetic flux generated by the common-mode current flowing through the first transformer primary winding 21 and the second transformer primary winding 22 on the common magnetic core 500, the transformer magnetic pillar 700, the first magnetic side pillar 100 and the second magnetic side pillar 200 is also completely canceled. This greatly reduces the core loss of the common magnetic core, and the thickness of the common magnetic core is relatively small.

[0050] In one embodiment of the present invention, an inductor air gap is provided between the inductor magnetic column 600 and the common magnetic core 500. Specifically, an inductor air gap can be provided between the inductor magnetic column 600 and the common magnetic core 500 to ensure the inductance. In another embodiment of the present invention, a transformer air gap is provided between the transformer magnetic column 700 and the common magnetic core 500. Specifically, a transformer air gap can be provided between the transformer magnetic column 700 and the common magnetic core 500 to ensure the inductance.

[0051] Therefore, by combining the flow direction of differential-mode current or common-mode current in a single-phase integrated magnetic element, the present invention adjusts the winding direction of the first inductor winding 11 and the second inductor winding 12 on the inductor magnetic column 600, as well as the winding direction of the first transformer primary winding 21 and the second transformer primary winding 22 on the transformer magnetic column 700, so that the magnetic flux generated by the common-mode current or differential-mode current flowing through the coupled inductor 10 and the transformer 20 on the common magnetic core is partially or completely canceled, greatly reducing the core loss in the common magnetic core, reducing the thickness of the common magnetic core 500, and improving the power density and power conversion efficiency of the converter.

[0052] Additionally, it should be noted that in one embodiment of the present invention, holes or slots may be made on the central magnetic column (i.e., the inductor magnetic column 600 and / or the transformer magnetic column 700) or on the magnetic side columns (i.e., the first magnetic side column 100 and / or the second magnetic side column 200) to enhance the heat dissipation effect of the magnetic components.

[0053] In summary, the single-phase integrated magnetic element according to an embodiment of the present invention includes: a coupled inductor, a transformer with a center tap, and a magnetic core structure. The magnetic core structure includes: a first magnetic side post, a second magnetic side post, an inductor magnetic cover, a transformer magnetic cover, a common magnetic core, an inductor magnetic column, and a transformer magnetic column. The first and second magnetic side posts are arranged opposite to each other. The inductor magnetic cover and the transformer magnetic cover are arranged between the first and second magnetic side posts and are also arranged opposite to each other. The common magnetic core is arranged between the inductor magnetic cover and the transformer magnetic cover. The inductor magnetic column is arranged between the inductor magnetic cover and the common magnetic core. The transformer magnetic column is arranged between the transformer magnetic cover and the common magnetic core. The coupled inductor includes a first inductor winding and a second inductor winding. The transformer's primary winding includes a first transformer primary winding and a second transformer primary winding. The second end of the first inductor winding is connected to the first end of the first transformer primary winding, and vice versa. By adjusting the winding directions of the first and second inductor windings on the inductor core and the winding directions of the first and second transformer primary windings on the transformer core, the magnetic flux generated on the common core by the common-mode or differential-mode currents flowing through the coupled inductor and transformer can be partially or completely canceled out. This significantly reduces the size, weight, and losses of the magnetic components, improving the power density and energy conversion efficiency of the converter.

[0054] Corresponding to the above embodiments, the present invention also proposes a three-phase integrated magnetic element.

[0055] In one embodiment of the present invention, the three-phase integrated magnetic element may include: a first coupled inductor, a second coupled inductor, a third coupled inductor, a first transformer with a center tap, a second transformer with a center tap, a third transformer with a center tap, and a magnetic core structure.

[0056] The first coupling inductor includes a first inductor winding and a second inductor winding. The primary side of the first transformer includes a first transformer primary winding and a second transformer primary winding. The second end of the first inductor winding is connected to the first end of the first transformer primary winding, and the second end of the second transformer primary winding is connected to the first end of the second inductor winding. The second coupling inductor includes a third inductor winding and a fourth inductor winding. The primary side of the second transformer includes a third transformer primary winding and a fourth transformer primary winding. The second end of the third inductor winding is connected to the first end of the second inductor winding. The first end of the primary winding of the third transformer is connected to the first end of the primary winding of the fourth transformer, and the second end of the primary winding of the fourth transformer is connected to the first end of the fourth inductor winding; the third coupling inductor includes the fifth inductor winding and the sixth inductor winding, and the primary side of the third transformer includes the primary winding of the fifth transformer and the primary winding of the sixth transformer, wherein the second end of the fifth inductor winding is connected to the first end of the primary winding of the fifth transformer, the second end of the primary winding of the fifth transformer is connected to the first end of the primary winding of the sixth transformer, and the second end of the primary winding of the sixth transformer is connected to the first end of the sixth inductor winding.

[0057] In other words, the first coupled inductor and the first transformer constitute the first phase of the three-phase integrated magnetic element; the second coupled inductor and the second transformer constitute the second phase of the three-phase integrated magnetic element; and the third coupled inductor and the third transformer constitute the third phase of the three-phase integrated magnetic element. The schematic diagram for each phase can be found by referring to... Figure 1 The schematic diagram of the single-phase integrated magnetic element shown can be referenced to indicate the direction of differential mode current flow in each phase. Figure 2 The differential-mode current flow direction in a single-phase integrated magnetic component is shown. The common-mode current flow direction in each phase can be referenced. Figure 3 The direction of common-mode current flow in a single-phase integrated magnetic component is shown.

[0058] The first end of the first inductor winding and the first end of the second inductor winding are the same name terminals; the first end of the primary winding of the first transformer is the same name terminal as the first end of the primary winding of the second transformer; the first end of the third inductor winding and the first end of the fourth inductor winding are the same name terminals; the first end of the third transformer's primary winding and the first end of the fourth transformer's primary winding are the same name terminals; the first end of the fifth inductor winding and the first end of the sixth inductor winding are the same name terminals; the first end of the fifth transformer's primary winding and the first end of the sixth transformer's primary winding are the same name terminals.

[0059] like Figure 7As shown, the magnetic core structure may include: a first magnetic side post 100, a second magnetic side post 200, an inductor magnetic cover 300, a transformer magnetic cover 400, a common magnetic core 500, a first inductor magnetic post 601, a second inductor magnetic post 602, a third inductor magnetic post 603, a first transformer magnetic post 701, a second transformer magnetic post 702, and a third transformer magnetic post 703.

[0060] The first magnetic side post 100 and the second magnetic side post 200 are arranged opposite to each other; the inductor magnetic cover 300 and the transformer magnetic cover 400 are arranged between the first magnetic side post 100 and the second magnetic side post 200, and are arranged opposite to each other; the common magnetic core 500 is arranged between the inductor magnetic cover 300 and the transformer magnetic cover 400; the first inductor magnetic post 604, the second inductor magnetic post 602 and the third inductor magnetic post 603 are respectively arranged between the inductor magnetic cover 300 and the common magnetic core 500; the first transformer magnetic post 701, the second transformer magnetic post 702 and the third transformer magnetic post 703 are respectively arranged between the transformer magnetic cover 400 and the common magnetic core 500.

[0061] Specifically, by adjusting the winding directions of the first and second inductor windings on the first inductor magnetic post 601, and the winding directions of the primary windings of the first and second transformers on the first transformer magnetic post 701, the magnetic flux generated on the common-mode or differential-mode current flowing through the first coupled inductor and the first transformer is partially or completely canceled out; by adjusting the winding directions of the third and fourth inductor windings on the second inductor magnetic post 602, and the winding directions of the primary windings of the third and fourth transformers on the second transformer magnetic post 701, the magnetic flux generated on the common magnetic core 500 by the common-mode or differential-mode current flowing through the first coupled inductor and the first transformer is partially or completely canceled out; The winding direction on the transformer core 702 is adjusted so that the magnetic flux generated on the common-mode current or differential-mode current flowing through the second coupled inductor and the second transformer in the common core 500 is partially or completely canceled; the winding direction of the fifth inductor winding and the sixth inductor winding on the third inductor core 603 and the winding direction of the primary winding of the fifth transformer and the primary winding of the sixth transformer on the third transformer core 703 are adjusted so that the magnetic flux generated on the common-mode current or differential-mode current flowing through the third coupled inductor and the third transformer in the common core 500 is partially or completely canceled.

[0062] In one embodiment of the present invention, it can be based on Figure 2The diagram illustrates the flow direction of the differential-mode current in the single-phase integrated magnetic component and the connection methods of the first inductor winding, the second inductor winding, the primary winding of the first transformer, and the primary winding of the second transformer. By adjusting the winding directions of the first and second inductor windings on the first inductor magnetic post 601 and the winding directions of the first and second transformer primary windings on the first transformer magnetic post 701, the magnetic flux generated on the common magnetic core 500 by the differential-mode current flowing through the first and second inductor windings is made to be in the same direction. The magnetic flux flowing through the primary windings of the first and second transformers is also made to be the same. The magnetic flux generated by the differential-mode current on the common magnetic core 500 is in the same direction. The magnetic flux generated by the differential-mode current flowing through the first inductor winding and the second inductor winding on the common magnetic core 500 is in the opposite direction to the magnetic flux generated by the differential-mode current flowing through the primary windings of the first transformer and the second transformer. Similarly, by adjusting the winding directions of the third and fourth inductor windings on the second inductor magnetic post 602, and the winding directions of the primary windings of the third and fourth transformers on the second transformer magnetic post 702, the magnetic flux flowing through the third and fourth inductor windings is made... The differential-mode currents flowing through the primary windings of the third and fourth transformers produce magnetic flux in the same direction on the common core 500. However, the differential-mode currents flowing through the primary windings of the third and fourth inductors produce magnetic flux in the opposite direction. Similarly, adjusting the winding direction of the fifth and sixth inductor windings on the third inductor core 603 and the primary winding direction of the fifth transformer... The winding direction of the primary winding of the sixth transformer on the magnetic column 703 of the third transformer is such that the magnetic flux generated by the differential mode current flowing through the fifth and sixth inductor windings on the common magnetic core 500 is in the same direction, and the magnetic flux generated by the differential mode current flowing through the primary windings of the fifth and sixth transformers on the common magnetic core 500 is in the same direction, while the magnetic flux generated by the differential mode current flowing through the primary windings of the fifth and sixth transformers on the common magnetic core 500 is opposite to the magnetic flux generated by the differential mode current flowing through the primary windings of the fifth and sixth transformers on the common magnetic core 500.

[0063] Specifically, as one possible implementation, the winding directions of the first and second inductor windings on the first inductor magnetic post 601 are the same as the winding directions of the primary windings of the first and second transformers on the first transformer magnetic post 701. The winding directions of the third and fourth inductor windings on the second inductor magnetic post 602 are the same as the winding directions of the primary windings of the third and fourth transformers on the second transformer magnetic post 702. The winding directions of the fifth and sixth inductor windings on the third inductor magnetic post 603 are the same as the winding directions of the primary windings of the fifth and sixth transformers on the third transformer magnetic post 703. Furthermore, the winding directions of the first and second inductor windings on the first inductor magnetic post 601 are the same as the winding directions of the primary windings of the fifth and sixth transformers on the third transformer magnetic post 703. The winding directions on column 601, the winding directions of the third and fourth inductor windings on the second inductor column 602, and the winding directions of the fifth and sixth inductor windings on the third inductor column 603 are the same. At this time, the magnetic flux directions generated on the common core 500 by the differential-mode currents flowing through the first and second inductor windings, the primary windings of the first and second transformers, and the primary windings of the second and third transformers are as follows: Figure 8 As indicated by the arrows, the magnetic flux generated on the common core 500 by the differential mode current flowing through the first and second inductor windings, the primary windings of the first and second transformers, is partially / completely canceled. Similarly, the magnetic flux generated on the common core 500 by the differential mode current flowing through the third and fourth inductor windings, the primary windings of the third and fourth transformers, and the primary windings of the fifth and sixth inductor windings, as well as the primary windings of the fifth and sixth transformers, is partially / completely canceled. This results in a small magnetic flux, low core loss, and a thin core between the coupled inductors of the same phase and the transformer with the center tap.

[0064] Furthermore, it is understandable that the magnetic flux of the three-phase coupled inductor and the transformer with the center tap will both pass through the edge magnetic columns (first magnetic column 100 and second magnetic column 200). When the three-phase currents are symmetrical, the magnetic flux flowing into the edge magnetic columns is symmetrical. The magnetic flux of the edge magnetic columns is small, the core loss is small, and the core wall is thin. Specifically, the magnetic flux of the edge magnetic columns can be expressed by the following formula:

[0065] Φ 边缘磁柱 =Φ A +Φ B +Φ C

[0066] =(Φ L +Φ T )[e jωt +e j(ωt+2π / 3) +e j(ωt-2π / 3) ]

[0067] ≈0,

[0068] Where, Φ 边缘磁柱 Φ represents the magnetic flux of the edge magnetic column. A Φ represents the magnetic flux generated on the edge magnetic column by the differential mode current flowing through the A-phase coupled inductor and the center-tapped transformer. B Φ represents the magnetic flux generated on the edge magnetic column by the differential mode current flowing through the B-phase coupled inductor and the center-tapped transformer. C Φ represents the magnetic flux generated on the edge magnetic column by the differential mode current flowing through the C-phase coupled inductor and the center-tapped transformer. L Φ represents the magnitude of the magnetic flux generated on the edge magnetic pillar by the differential-mode current flowing through the coupled inductors of phases A / B / C. T This represents the magnitude of the magnetic flux generated on the edge magnetic column by the differential mode current flowing through the transformer with center tap in phase A / phase B / phase C.

[0069] In other words, the total width of the three-phase integrated magnetic element obtained using the method of this invention is much smaller than the total width of three single-phase integrated magnetic elements arranged laterally, approximately the sum of the lengths of two single-phase integrated magnetic elements. This ensures that the three-phase integrated magnetic element is small in size, and the edge magnetic pillars decouple the coupled inductance of the three phases from the transformer with the center tap. It should be noted that in other embodiments of this invention, the three sets of magnetic pillars can also be arranged circumferentially to form a three-phase integrated magnetic element, which also belongs to the category of three-phase integrated magnetic elements obtained by lateral arrangement.

[0070] In one embodiment of the present invention, it can be based on Figure 3The diagram illustrates the flow direction of the common-mode current in a single-phase integrated magnetic component and the connection methods of the first inductor winding, the second inductor winding, the primary winding of the first transformer, and the primary winding of the second transformer. Adjusting the winding directions of the first and second inductor windings on the first inductor core 601 and the winding directions of the first and second transformer primary windings on the first transformer core 701 ensures that the common-mode current flowing through the first and second inductor windings circulates through the common core 500, the first inductor core 601, and the first... The magnetic flux generated on the magnetic side post 100 and the second magnetic side post 200 is in opposite directions. Similarly, the common-mode current flowing through the primary windings of the first and second transformers generates magnetic flux in opposite directions on the common core 500, the first transformer magnetic post 701, the first magnetic side post 100, and the second magnetic side post 200. Likewise, adjusting the winding directions of the third and fourth inductor windings on the second inductor magnetic post 602, and the winding directions of the primary windings of the third and fourth transformers on the second transformer magnetic post 702, ensures that the magnetic flux flowing through the third... The common-mode currents of the inductor windings and the fourth inductor winding generate magnetic fluxes in opposite directions on the common core 500, the second inductor post 602, the first magnetic side post 100, and the second magnetic side post 200. Similarly, the common-mode currents flowing through the primary windings of the third and fourth transformers generate magnetic fluxes in opposite directions on the common core 500, the second transformer post 702, the first magnetic side post 100, and the second magnetic side post 200. Likewise, adjusting the winding direction of the fifth and sixth inductor windings on the third inductor post 603 and the fifth transformer... The winding directions of the primary windings of the transformer and the sixth transformer on the magnetic column 703 of the third transformer cause the magnetic flux generated by the common-mode current flowing through the fifth and sixth inductor windings on the common magnetic core 500, the magnetic column 603 of the third inductor, the first magnetic column 100, and the second magnetic column 200 to be in opposite directions.

[0071] Specifically, as one possible implementation, the winding directions of the first and second inductor windings on the first inductor post 601 are the same as the winding directions of the primary windings of the first and second transformers on the first transformer post 701. The winding directions of the third and fourth inductor windings on the second inductor post 602 are the same as the winding directions of the primary windings of the third and fourth transformers on the second transformer post 702. The winding directions of the fifth and sixth inductor windings on the third inductor post 603 are the same as the winding directions of the primary windings of the fifth and sixth transformers on the third transformer post 703. Furthermore, the winding directions of the first and second inductor windings on the first inductor post 601, the winding directions of the third and fourth inductor windings on the second inductor post 602, and the winding directions of the fifth and sixth inductor windings on the third inductor post 603 are all the same. At this point, the magnetic flux generated by the common-mode current flowing through the first and second inductor windings on the common core 500, the first inductor column 601, the first magnetic side column 100, and the second magnetic side column 200 is completely canceled out. Similarly, the magnetic flux generated by the common-mode current flowing through the primary windings of the first and second transformers on the common core 500, the first transformer column 701, the first magnetic side column 100, and the second magnetic side column 200 is completely canceled out. The magnetic flux generated by the common-mode current flowing through the third and fourth inductor windings on the common core 500, the second inductor column 602, the first magnetic side column 100, and the second magnetic side column 200 is completely canceled out. The magnetic flux generated in the common magnetic core 500, the second transformer magnetic column 702, the first magnetic side column 100, and the second magnetic side column 200 completely cancels out the magnetic flux generated in the common magnetic core 500, the third inductor magnetic column 603, the first magnetic side column 100, and the second magnetic side column 200 by the common-mode current flowing through the fifth and sixth inductor windings completely cancels out the magnetic flux generated in the common magnetic core 500, the third transformer magnetic column 703, the first magnetic side column 100, and the second magnetic side column 200 by the common-mode current flowing through the primary windings of the fifth and sixth transformers completely cancels out the magnetic flux generated in the common magnetic core 500, the third transformer magnetic column 703, the first magnetic side column 100, and the second magnetic side column 200. This makes the magnetic flux generated in the common magnetic core 500 approximately zero, thereby reducing the core loss in the common magnetic core 500 and reducing the thickness of the common magnetic core 500.

[0072] Additionally, it should be noted that, in one embodiment of the present invention, holes or slots may be made on the central magnetic pillar (i.e., the first inductor magnetic pillar 601, the second inductor magnetic pillar 602, the third inductor magnetic pillar 603, the first transformer magnetic pillar 701, the second transformer magnetic pillar 702, and the third transformer magnetic pillar 703), or on the magnetic side pillars (i.e., the first magnetic side pillar 100 and / or the second magnetic side pillar 200) to enhance the heat dissipation effect of the magnetic components.

[0073] In summary, the three-phase integrated magnetic component according to an embodiment of the present invention includes: a first coupled inductor, a second coupled inductor, a third coupled inductor, a first transformer with a center tap, a second transformer with a center tap, a third transformer with a center tap, and a magnetic core structure. The magnetic core structure includes: a first magnetic side post, a second magnetic side post, an inductor magnetic cover, a transformer magnetic cover, a common magnetic core, a first inductor magnetic post, a second inductor magnetic post, a third inductor magnetic post, a first transformer magnetic post, a second transformer magnetic post, and a third transformer magnetic post. The first and second magnetic side posts are arranged opposite to each other; the inductor magnetic cover and the transformer magnetic cover are disposed between the first and second magnetic side posts and are arranged opposite to each other; the common magnetic core is disposed between the inductor magnetic cover and the transformer magnetic cover. The first, second, and third inductor magnetic pillars are respectively disposed between the inductor magnetic cover and the common magnetic core; the first, second, and third transformer magnetic pillars are respectively disposed between the transformer magnetic cover and the common magnetic core; the first coupling inductor includes a first inductor winding and a second inductor winding, the primary side of the first transformer includes a first transformer primary winding and a second transformer primary winding, wherein the second end of the first inductor winding is connected to the first end of the first transformer primary winding, the second end of the first transformer primary winding is connected to the first end of the second transformer primary winding, and the second end of the second transformer primary winding is connected to the first end of the second inductor winding; the second coupling inductor includes a third inductor winding and a fourth inductor winding. The primary windings of the second transformer include the primary windings of the third and fourth transformers. The second end of the third inductor winding is connected to the first end of the primary winding of the third transformer, and the second end of the primary winding of the third transformer is connected to the first end of the primary winding of the fourth transformer. The second end of the primary winding of the fourth transformer is also connected to the first end of the fourth inductor winding. The third coupling inductor includes the fifth and sixth inductor windings. The primary windings of the third transformer include the primary windings of the fifth and sixth transformers. The second end of the fifth inductor winding is connected to the first end of the primary winding of the fifth transformer, and the second end of the primary winding of the fifth transformer is connected to the first end of the primary winding of the sixth transformer. The second end of the primary winding of the sixth transformer... The first end of the sixth inductor winding is connected to the first end of the sixth inductor winding; wherein, by adjusting the winding directions of the first and second inductor windings on the first inductor magnetic pillar and the winding directions of the primary windings of the first and second transformers on the first transformer magnetic pillar, the magnetic flux generated on the common magnetic core by the common-mode current or differential-mode current flowing through the first coupled inductor and the first transformer is partially or completely canceled; by adjusting the winding directions of the third and fourth inductor windings on the second inductor magnetic pillar and the winding directions of the primary windings of the third and fourth transformers on the second transformer magnetic pillar, the magnetic flux generated on the common magnetic core by the common-mode current or differential-mode current flowing through the second coupled inductor and the second transformer is partially or completely canceled;By adjusting the winding directions of the fifth and sixth inductor windings on the magnetic core of the third inductor, and the winding directions of the primary windings of the fifth and sixth transformers on the magnetic core of the third transformer, the magnetic flux generated on the common core by the common-mode or differential-mode currents flowing through the third coupled inductor and the third transformer can be partially or completely canceled out. This significantly reduces the size, weight, and losses of the magnetic components, thereby improving the power density and energy conversion efficiency of the converter.

[0074] Corresponding to the above embodiments, the present invention also proposes another three-phase integrated magnetic element.

[0075] In another embodiment of the present invention, the three-phase integrated magnetic element may include: a first coupled inductor, a second coupled inductor, a third coupled inductor, a first transformer with a center tap, a second transformer with a center tap, a third transformer with a center tap, and a magnetic core structure.

[0076] The first coupling inductor includes a first inductor winding and a second inductor winding. The primary side of the first transformer includes a first transformer primary winding and a second transformer primary winding. The second end of the first inductor winding is connected to the first end of the first transformer primary winding, and the second end of the second transformer primary winding is connected to the first end of the second inductor winding. The second coupling inductor includes a third inductor winding and a fourth inductor winding. The primary side of the second transformer includes a third transformer primary winding and a fourth transformer primary winding. The second end of the third inductor winding is connected to the first end of the second inductor winding. The first end of the primary winding of the third transformer is connected to the first end of the primary winding of the fourth transformer, and the second end of the primary winding of the fourth transformer is connected to the first end of the fourth inductor winding; the third coupling inductor includes the fifth inductor winding and the sixth inductor winding, and the primary side of the third transformer includes the primary winding of the fifth transformer and the primary winding of the sixth transformer, wherein the second end of the fifth inductor winding is connected to the first end of the primary winding of the fifth transformer, the second end of the primary winding of the fifth transformer is connected to the first end of the primary winding of the sixth transformer, and the second end of the primary winding of the sixth transformer is connected to the first end of the sixth inductor winding.

[0077] In other words, the first coupled inductor and the first transformer constitute the first phase of the three-phase integrated magnetic element; the second coupled inductor and the second transformer constitute the second phase of the three-phase integrated magnetic element; and the third coupled inductor and the third transformer constitute the third phase of the three-phase integrated magnetic element. The schematic diagram for each phase can be found by referring to... Figure 1 The schematic diagram of the single-phase integrated magnetic element shown can be referenced to indicate the direction of differential mode current flow in each phase. Figure 2 The differential-mode current flow direction in a single-phase integrated magnetic component is shown. The common-mode current flow direction in each phase can be referenced. Figure 3The direction of common-mode current flow in a single-phase integrated magnetic component is shown.

[0078] The first end of the first inductor winding and the first end of the second inductor winding are the same name terminals; the first end of the primary winding of the first transformer is the same name terminal as the first end of the primary winding of the second transformer; the first end of the third inductor winding and the first end of the fourth inductor winding are the same name terminals; the first end of the third transformer's primary winding and the first end of the fourth transformer's primary winding are the same name terminals; the first end of the fifth inductor winding and the first end of the sixth inductor winding are the same name terminals; the first end of the fifth transformer's primary winding and the first end of the sixth transformer's primary winding are the same name terminals.

[0079] like Figure 9 As shown, the magnetic core structure includes: a first magnetic side post 100, a second magnetic side post 200, an inductor magnetic cover 300, a transformer magnetic cover 400, a first phase-to-phase common magnetic core 501, a second phase-to-phase common magnetic core 502, a first phase-to-phase common magnetic core 503, a second phase-to-phase common magnetic core 504, a third phase-to-phase common magnetic core 505, a first inductor magnetic post 601, a second inductor magnetic post 602, a third inductor magnetic post 603, a first transformer magnetic post 701, a second transformer magnetic post 702, and a third transformer magnetic post 703.

[0080] The first magnetic side post 100 and the second magnetic side post 200 are arranged opposite to each other; the inductor magnetic cover 300 and the transformer magnetic cover 400 are arranged between the first magnetic side post 100 and the second magnetic side post 200, and are arranged opposite to each other; the first phase-to-phase common magnetic core 501 and the second phase-to-phase common magnetic core 502 are respectively arranged between the inductor magnetic cover 300 and the transformer magnetic cover 400; the first phase common magnetic core 503 is arranged between the inductor magnetic cover 300 and the first phase-to-phase common magnetic core 501; the second phase common magnetic core 504 is arranged between the first phase-to-phase common magnetic core 501 and the second phase-to-phase common magnetic core 502; and the third phase common magnetic core 505 is arranged between the second phase-to-phase common magnetic core 502 and the transformer magnetic cover 400. Between 0; the first inductor magnetic column 601 is disposed between the inductor magnetic cover 300 and the first phase common magnetic core 503, the second inductor magnetic column 602 is disposed between the first phase interphase common magnetic core 501 and the second phase common magnetic core 504, and the third inductor magnetic column 603 is disposed between the second phase interphase common magnetic core 502 and the third phase common magnetic core 505; the first transformer magnetic column 701 is disposed between the first phase common magnetic core 503 and the first phase interphase common magnetic core 501, the second transformer magnetic column 702 is disposed between the second phase common magnetic core 504 and the second phase interphase common magnetic core 502, and the third transformer magnetic column 703 is disposed between the third phase common magnetic core 505 and the transformer magnetic cover 400.

[0081] Specifically, by adjusting the winding directions of the first and second inductor windings on the first inductor's magnetic pillar, and the winding directions of the primary windings of the first and second transformers on the first transformer's magnetic pillar, the magnetic flux generated on the first phase common core by the common-mode current or differential-mode current flowing through the first coupled inductor and the first transformer is partially or completely canceled out; by adjusting the winding directions of the third and fourth inductor windings on the second inductor's magnetic pillar, and the winding directions of the primary windings of the third and fourth transformers on the second transformer's magnetic pillar, the magnetic flux generated on the second phase common core by the common-mode current or differential-mode current flowing through the second coupled inductor and the second transformer is partially or completely canceled out; by adjusting the winding directions of the fifth and sixth inductor windings on the third inductor's magnetic pillar, and the winding directions of the primary windings of the fifth and sixth transformers on the third transformer's magnetic pillar, the magnetic flux generated on the third phase common core by the common-mode current or differential-mode current flowing through the third coupled inductor and the third transformer is partially or completely canceled out.

[0082] In one embodiment of the present invention, it can be based on Figure 2The diagram illustrates the flow direction of the differential-mode current in the single-phase integrated magnetic component and the connection methods of the first inductor winding, the second inductor winding, the primary winding of the first transformer, and the primary winding of the second transformer. Adjusting the winding directions of the first and second inductor windings on the first inductor core 601 and the winding directions of the first and second transformer primary windings on the first transformer core 701 ensures that the magnetic flux generated by the differential-mode current flowing through the first and second inductor windings on the first phase common core 503 is in the same direction. The differential-mode current flowing through the primary windings of the first and second transformers... The magnetic flux generated on the common magnetic core 503 of the first phase has the same direction. The direction of the magnetic flux generated on the common magnetic core 503 by the differential mode current flowing through the first inductor winding and the second inductor winding is opposite to the direction of the magnetic flux generated on the common magnetic core 503 by the differential mode current flowing through the primary windings of the first transformer and the second transformer. Similarly, by adjusting the winding directions of the third and fourth inductor windings on the second inductor magnetic post 602 and the winding directions of the primary windings of the third and fourth transformers on the second transformer magnetic post 702, the differential mode current flowing through the third and fourth inductor windings is adjusted. The magnetic flux generated on the second-phase common core 504 is in the same direction. The differential-mode current flowing through the primary windings of the third and fourth transformers generates magnetic flux in the same direction on the second-phase common core 504. The magnetic flux generated by the differential-mode current flowing through the third and fourth inductor windings is opposite to the magnetic flux generated by the differential-mode current flowing through the primary windings of the third and fourth transformers on the second-phase common core 504. Similarly, adjusting the winding direction of the fifth and sixth inductor windings on the third inductor core 603, as well as the winding direction of the fifth transformer primary winding and the sixth inductor core 604... The winding direction of the transformer primary winding on the third transformer magnetic column 703 is such that the magnetic flux generated by the differential mode current flowing through the fifth and sixth inductor windings on the third phase common magnetic core 505 is in the same direction, the magnetic flux generated by the differential mode current flowing through the fifth and sixth transformer primary windings on the third phase common magnetic core 505 is in the same direction, and the magnetic flux generated by the differential mode current flowing through the fifth and sixth inductor windings on the third phase common magnetic core 505 is opposite to the magnetic flux generated by the differential mode current flowing through the fifth and sixth transformer primary windings on the third phase common magnetic core 505.Specifically, the magnetic flux generated on the first inductor post 601 by the differential-mode current flowing through the first and second inductor windings is in the same direction as the magnetic flux generated on the third inductor post 603 by the differential-mode current flowing through the fifth and sixth inductor windings. Conversely, the magnetic flux generated on the first inductor post 601 by the differential-mode current flowing through the first and second inductor windings is in the opposite direction to the magnetic flux generated on the second inductor post 602 by the differential-mode current flowing through the third and fourth inductor windings.

[0083] Specifically, as one possible implementation, the winding directions of the coupled inductors in the two peripheral phases are the same as those of the transformer primary winding, and opposite to those of the coupled inductors in the middle phase. Specifically, the winding directions of the first and second inductor windings on the first inductor post 601 are opposite to those of the third and fourth inductor windings on the second inductor post 602. The winding directions of the first and second inductor windings on the first inductor post 601 are also opposite to those of the fifth and sixth inductor windings on the third inductor post 603. With the lines in the same direction, the magnetic flux direction generated by the differential mode current flowing through the first inductor winding, the second inductor winding, the primary winding of the first transformer, and the primary winding of the second transformer on the first phase common magnetic core 503, the magnetic flux direction generated by the differential mode current flowing through the third inductor winding, the fourth inductor winding, the primary winding of the third transformer, and the primary winding of the fourth transformer on the second phase common magnetic core 504, and the magnetic flux direction generated by the differential mode current flowing through the fifth inductor winding, the sixth inductor winding, the primary winding of the fifth transformer, and the primary winding of the sixth transformer on the third phase common magnetic core 505, can be as follows: Figure 10 As indicated by the arrows, at this point, the magnetic flux generated by the differential mode current flowing through the first and second inductor windings, the primary windings of the first and second transformers, and the common magnetic core 503 of the first phase is partially or completely canceled out. The magnetic flux generated by the differential mode current flowing through the third and fourth inductor windings, the primary windings of the third and fourth transformers, and the common magnetic core 504 of the second phase is partially or completely canceled out. The magnetic flux generated by the differential mode current flowing through the fifth and sixth inductor windings, the primary windings of the fifth and sixth transformers, and the common magnetic core 505 of the third phase is partially or completely canceled out. This results in a small magnetic flux, low core loss, and a thin core between the coupled inductors of the same phase and the common magnetic core of the corresponding phase of the transformer with the center tap. Furthermore, the magnetic flux of the interphase common magnetic core (i.e., the first interphase common magnetic core 501 and the second interphase common magnetic core 502) between adjacent and different phase coupled inductors and the transformer with center tap is approximately equal to the magnetic flux of the inductor magnetic cover or transformer magnetic cover before longitudinal arrangement. Specifically, the magnetic flux generated by the first interphase common magnetic core 501 or the magnetic flux of the second interphase common magnetic core 502 can be expressed by the following formula:

[0084] Φ 相间公共磁芯 =Φ A_T +Φ B_L

[0085] =Φ B_T +Φ C_L

[0086] =Φ T e j(ωt+2π / 3) +Φ L e jωt

[0087] ≈Φ L e j(ωt+π / 3)

[0088] ≈Φ T e j(ωt+π / 3) ,

[0089] Where, Φ 相间公共磁芯 Φ represents the magnetic flux generated by the first interphase common magnetic core 501 or the magnetic flux generated by the second interphase common magnetic core 502. A_T Φ represents the magnetic flux generated by the differential-mode current flowing through the primary windings of the first and second transformers in the first phase-to-phase common magnetic core 501. B_L Φ represents the magnetic flux generated by the differential-mode current flowing through the third and fourth inductor windings in the first phase common core 501. B_T Φ represents the magnetic flux generated by the differential-mode current flowing through the primary windings of the third and fourth transformers in the second phase common core 502. C_L Φ represents the magnetic flux generated by the differential-mode current flowing through the fifth and sixth inductor windings in the second phase common core 502. T Φ represents the magnetic flux generated by the differential-mode current flowing through the primary windings of the first and second transformers in the first phase-to-phase common magnetic core 501, or the magnetic flux generated by the differential-mode current flowing through the primary windings of the third and fourth transformers in the second phase-to-phase common magnetic core 502. L This represents the magnetic flux generated by the differential-mode current flowing through the third and fourth inductor windings in the first phase common magnetic core 501, or the magnetic flux generated by the differential-mode current flowing through the fifth and sixth inductor windings in the second phase common magnetic core 502.

[0090] Therefore, the thickness of the interphase common magnetic core (first interphase common magnetic core 501 or second interphase common magnetic core 502) is approximately equal to the thickness of the inductor magnetic cover or transformer magnetic cover of the vertically arranged single-phase integrated magnetic element. In other words, the total length of the three-phase integrated magnetic element obtained by the method of the present invention is much smaller than the sum of the lengths of three single-phase integrated magnetic elements arranged vertically, thereby ensuring that the three-phase integrated magnetic element has a small volume.

[0091] As another possible implementation, the winding directions of the three-phase coupled inductors and the primary winding of the transformer are all the same. Specifically, the winding directions of the first and second inductor windings on the first inductor core 601, the winding directions of the third and fourth inductor windings on the second inductor core 602, and the winding directions of the fifth and sixth inductor windings on the third inductor core 603 are all the same. In this case, the differential mode current flowing through the first and second inductor windings and the primary windings of the first and second transformers is on the first phase common core 503. The generated magnetic flux is partially or completely canceled out. The magnetic flux generated by the differential mode current flowing through the third and fourth inductor windings, as well as the primary windings of the third and fourth transformers, on the second-phase common magnetic core 504 is partially or completely canceled out. The magnetic flux generated by the differential mode current flowing through the fifth and sixth inductor windings, as well as the primary windings of the fifth and sixth transformers, on the third-phase common magnetic core 505 is partially or completely canceled out. As a result, the magnetic flux of the coupled inductor of the same phase and the common magnetic core of the corresponding phase between the transformer with the center tap is small, the core loss is small, and the core is thin.

[0092] In one embodiment of the present invention, it can be based on Figure 3The diagram illustrates the flow direction of the common-mode current in the single-phase integrated magnetic component and the connection methods of the first inductor winding 11, the second inductor winding 12, the primary winding 21 of the first transformer, and the primary winding 22 of the second transformer. Adjusting the winding directions of the first and second inductor windings on the first inductor core 601 and the primary windings of the first and second transformers on the first transformer core 701 ensures that the common-mode current flowing through the first and second inductor windings is transmitted through the first phase common core 503 and the first inductor core 601. 01. The magnetic flux generated on the first magnetic side post 100 and the second magnetic side post 200 is in opposite directions. The common-mode current flowing through the primary windings of the first and second transformers, the first phase common magnetic core 503, and the magnetic column 701 of the first transformer, as well as the magnetic flux generated on the first magnetic side post 100 and the second magnetic side post 200, are in opposite directions. Similarly, by adjusting the winding directions of the third and fourth inductor windings on the second inductor magnetic column 602, and the winding directions of the primary windings of the third and fourth transformers on the second transformer magnetic column 702, the magnetic flux flowing through the first and second phase common magnetic cores 503 and 701 of the first transformer, as well as the magnetic flux generated on the first magnetic side post 100 and the second magnetic side post 200, is made to ensure that the magnetic flux flowing through the first and second phase common magnetic cores 503, the first phase common magnetic core 503, and the first transformer magnetic column 701 is in opposite directions. The common-mode currents of the third and fourth inductor windings generate magnetic fluxes in opposite directions on the second-phase common core 504, the second inductor post 602, the first magnetic side post 100, and the second magnetic side post 200. Similarly, the common-mode currents flowing through the primary windings of the third and fourth transformers generate magnetic fluxes in opposite directions on the second-phase common core 504, the second transformer post 702, the first magnetic side post 100, and the second magnetic side post 200. Likewise, adjusting the winding direction of the fifth and sixth inductor windings on the third inductor post 603 and the fifth... The winding directions of the primary windings of the transformer and the sixth transformer on the magnetic column 703 of the third transformer cause the magnetic flux generated by the common-mode current flowing through the fifth and sixth inductor windings in opposite directions on the third-phase common magnetic core 504, the third inductor magnetic column 603, the first magnetic side column 100, and the second magnetic side column 200. Similarly, the magnetic flux generated by the common-mode current flowing through the primary windings of the fifth and sixth transformers in opposite directions on the third-phase common magnetic core 504, the third transformer magnetic column 703, the first magnetic side column 100, and the second magnetic side column 200. Specifically, refer to the description in the above embodiment regarding how the magnetic flux cancels out when common-mode current flows into the three-phase integrated magnetic components; to avoid redundancy, this will not be repeated here.

[0093] Additionally, it should be noted that, in one embodiment of the present invention, holes or slots may be made on the central magnetic pillar (i.e., the first inductor magnetic pillar 601, the second inductor magnetic pillar 602, the third inductor magnetic pillar 603, the first transformer magnetic pillar 701, the second transformer magnetic pillar 702, and the third transformer magnetic pillar 703), or on the magnetic side pillars (i.e., the first magnetic side pillar 100 and / or the second magnetic side pillar 200) to enhance the heat dissipation effect of the magnetic components.

[0094] In summary, the three-phase integrated magnetic component according to an embodiment of the present invention includes: a first coupled inductor, a second coupled inductor, a third coupled inductor, a first transformer with a center tap, a second transformer with a center tap, a third transformer with a center tap, and a magnetic core structure. The magnetic core structure includes: a first magnetic side post, a second magnetic side post, an inductor magnetic cover, a transformer magnetic cover, a first phase-to-phase common magnetic core, a second phase-to-phase common magnetic core, a first phase-to-phase common magnetic core, a second phase-to-phase common magnetic core, a third phase-to-phase common magnetic core, a first inductor magnetic column, a second inductor magnetic column, a third inductor magnetic column, a first transformer magnetic column, a second transformer magnetic column, and a third transformer magnetic column, wherein the first magnetic side post and the second magnetic side post are arranged opposite to each other; the inductor magnetic cover and the transformer magnetic cover are arranged... The first magnetic side post and the second magnetic side post are positioned opposite each other; the first phase-to-phase common magnetic core and the second phase-to-phase common magnetic core are respectively positioned between the inductor magnetic cover and the transformer magnetic cover; the first phase common magnetic core is positioned between the inductor magnetic cover and the first phase-to-phase common magnetic core, the second phase common magnetic core is positioned between the first phase-to-phase common magnetic core and the second phase-to-phase common magnetic core, and the third phase common magnetic core is positioned between the second phase-to-phase common magnetic core and the transformer magnetic cover; the first inductor magnetic post is positioned between the inductor magnetic cover and the first phase common magnetic core, the second inductor magnetic post is positioned between the first phase-to-phase common magnetic core and the second phase common magnetic core, and the third inductor magnetic post is positioned between the second phase-to-phase common magnetic core and the third phase common magnetic core; the first transformer magnetic post is positioned between the first phase common magnetic core. Between the first phase common magnetic core and the second phase common magnetic core, the second transformer magnetic column is disposed between the second phase common magnetic core and the second phase common magnetic core, and the third transformer magnetic column is disposed between the third phase common magnetic core and the transformer magnetic cover; the first coupling inductor includes a first inductor winding and a second inductor winding, the primary side of the first transformer includes a first transformer primary winding and a second transformer primary winding, wherein the second end of the first inductor winding is connected to the first end of the first transformer primary winding, the second end of the first transformer primary winding is connected to the first end of the second transformer primary winding, and the second end of the second transformer primary winding is connected to the first end of the second inductor winding; the second coupling inductor includes a third inductor winding and a fourth inductor winding, and the primary side of the second transformer includes a third transformer... The primary winding of the third transformer and the primary winding of the fourth transformer are provided. The second end of the third inductor winding is connected to the first end of the primary winding of the third transformer, the second end of the primary winding of the third transformer is connected to the first end of the primary winding of the fourth transformer, and the second end of the primary winding of the fourth transformer is connected to the first end of the primary winding of the fourth inductor winding. The third coupling inductor includes a fifth inductor winding and a sixth inductor winding. The primary winding of the third transformer includes a fifth inductor winding and a sixth inductor winding. The second end of the fifth inductor winding is connected to the first end of the primary winding of the fifth transformer, the second end of the primary winding of the fifth transformer is connected to the first end of the primary winding of the sixth transformer, and the second end of the primary winding of the sixth transformer is connected to the first end of the primary winding of the sixth inductor winding.Specifically, by adjusting the winding directions of the first and second inductor windings on the first inductor's magnetic pillar, and the winding directions of the primary windings of the first and second transformers on the first transformer's magnetic pillar, the magnetic flux generated on the first phase common core by the common-mode current or differential-mode current flowing through the first coupled inductor and the first transformer is partially or completely canceled out; by adjusting the winding directions of the third and fourth inductor windings on the second inductor's magnetic pillar, and the winding directions of the primary windings of the third and fourth transformers on the second transformer's magnetic pillar, the magnetic flux generated on the second phase common core by the common-mode current or differential-mode current flowing through the second coupled inductor and the second transformer is partially or completely canceled out; by adjusting the winding directions of the fifth and sixth inductor windings on the third inductor's magnetic pillar, and the winding directions of the primary windings of the fifth and sixth transformers on the third transformer's magnetic pillar, the magnetic flux generated on the third phase common core by the common-mode current or differential-mode current flowing through the third coupled inductor and the third transformer is partially or completely canceled out. This significantly reduces the size, weight, and losses of magnetic components, while improving the power density and energy conversion efficiency of the converter.

[0095] In the description of this invention, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. "A plurality of" means two or more, unless otherwise explicitly specified.

[0096] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0097] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0098] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Furthermore, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0099] Furthermore, the functional units in the various embodiments of the present invention can be integrated into a processing module, or each unit can exist physically separately, or two or more units can be integrated into a module. The integrated module can be implemented in hardware or as a software functional module. If the integrated module is implemented as a software functional module and sold or used as an independent product, it can also be stored in a computer-readable storage medium.

[0100] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A single-phase integrated magnetic element, characterized in that, include: The system comprises a coupled inductor, a transformer with a center tap, and a magnetic core structure. The magnetic core structure includes: a first magnetic side post, a second magnetic side post, an inductor magnetic cover, a transformer magnetic cover, a common magnetic core, an inductor magnetic post, and a transformer magnetic post. The first magnetic edge post and the second magnetic edge post are arranged opposite to each other; The inductor magnetic cover and the transformer magnetic cover are disposed between the first magnetic side post and the second magnetic side post, and are disposed opposite to each other; The common magnetic core is disposed between the inductor magnetic cover and the transformer magnetic cover; The inductor magnetic column is disposed between the inductor magnetic cover and the common magnetic core; The transformer magnetic column is disposed between the transformer magnetic cover and the common magnetic core; The coupled inductor includes a first inductor winding and a second inductor winding. The primary winding of the transformer includes a first transformer primary winding and a second transformer primary winding. The second end of the first inductor winding is connected to the first end of the first transformer primary winding, the second end of the first transformer primary winding is connected to the first end of the second transformer primary winding, and the second end of the second transformer primary winding is connected to the first end of the second inductor winding. By adjusting the winding directions of the first inductor winding and the second inductor winding on the inductor core, and the winding directions of the first transformer primary winding and the second transformer primary winding on the transformer core, the magnetic flux generated on the common core by the common-mode current or differential-mode current flowing through the coupled inductor and the transformer is partially or completely canceled out.

2. The single-phase integrated magnetic element according to claim 1, characterized in that, The magnetic flux generated on the common magnetic core by the differential mode current flowing through the first inductor winding and the second inductor winding is in the same direction. The magnetic flux generated on the common magnetic core by the differential mode current flowing through the primary winding of the first transformer and the primary winding of the second transformer is in the same direction. The magnetic flux generated on the common magnetic core by the differential mode current flowing through the first inductor winding and the second inductor winding is opposite to the magnetic flux generated on the common magnetic core by the differential mode current flowing through the primary winding of the first transformer and the primary winding of the second transformer.

3. The single-phase integrated magnetic element according to claim 1, characterized in that, The common-mode current flowing through the first inductor winding and the second inductor winding generates magnetic flux in opposite directions on the common magnetic core, the inductor magnetic column, the first magnetic side column, and the second magnetic side column. Similarly, the common-mode current flowing through the primary winding of the first transformer and the primary winding of the second transformer generates magnetic flux in opposite directions on the common magnetic core, the transformer magnetic column, the first magnetic side column, and the second magnetic side column.

4. The single-phase integrated magnetic element according to claim 1, characterized in that, An inductor air gap is provided between the inductor column and the common magnetic core.

5. The single-phase integrated magnetic element according to claim 1, characterized in that, A transformer air gap is provided between the transformer magnetic column and the common magnetic core.

6. A three-phase integrated magnetic element, characterized in that, include: The system comprises a first coupled inductor, a second coupled inductor, a third coupled inductor, a first transformer with a center tap, a second transformer with a center tap, a third transformer with a center tap, and a magnetic core structure. The magnetic core structure includes: a first magnetic side post, a second magnetic side post, an inductor magnetic cover, a transformer magnetic cover, a common magnetic core, a first inductor magnetic post, a second inductor magnetic post, a third inductor magnetic post, a first transformer magnetic post, a second transformer magnetic post, and a third transformer magnetic post. The first magnetic edge post and the second magnetic edge post are arranged opposite to each other; The inductor magnetic cover and the transformer magnetic cover are disposed between the first magnetic side post and the second magnetic side post, and are disposed opposite to each other; The common magnetic core is disposed between the inductor magnetic cover and the transformer magnetic cover; The first inductor magnetic post, the second inductor magnetic post, and the third inductor magnetic post are respectively disposed between the inductor magnetic cover and the common magnetic core; The first transformer magnetic column, the second transformer magnetic column, and the third transformer magnetic column are respectively disposed between the transformer magnetic cover and the common magnetic core; The first coupling inductor includes a first inductor winding and a second inductor winding. The primary side of the first transformer includes a first transformer primary winding and a second transformer primary winding. The second end of the first inductor winding is connected to the first end of the first transformer primary winding, and the second end of the second transformer primary winding is connected to the first end of the second inductor winding. The second coupling inductor includes a third inductor winding and a fourth inductor winding. The primary side of the second transformer includes a third transformer primary winding and a fourth transformer primary winding. The second end of the third inductor winding is connected to the first end of the second transformer primary winding. The first end of the primary winding of the third transformer is connected to the first end of the primary winding of the fourth transformer, and the second end of the primary winding of the fourth transformer is connected to the first end of the fourth inductor winding; the third coupling inductor includes a fifth inductor winding and a sixth inductor winding, and the primary side of the third transformer includes the primary windings of the fifth and sixth transformers, wherein the second end of the fifth inductor winding is connected to the first end of the primary winding of the fifth transformer, the second end of the primary winding of the fifth transformer is connected to the first end of the primary winding of the sixth transformer, and the second end of the primary winding of the sixth transformer is connected to the first end of the sixth inductor winding; wherein... By adjusting the winding directions of the first and second inductor windings on the first inductor's magnetic pillar, and the winding directions of the first and second transformer primary windings on the first transformer's magnetic pillar, the magnetic flux generated on the common core by the common-mode or differential-mode current flowing through the first coupled inductor and the first transformer is partially or completely canceled out; by adjusting the winding directions of the third and fourth inductor windings on the second inductor's magnetic pillar, and the winding directions of the third and fourth transformer primary windings on the second transformer's magnetic pillar, the magnetic flux generated on the common core by the common-mode or differential-mode current flowing through the second coupled inductor and the second transformer is partially or completely canceled out; by adjusting the winding directions of the fifth and sixth inductor windings on the third inductor's magnetic pillar, and the winding directions of the fifth and sixth transformer primary windings on the third transformer's magnetic pillar, the magnetic flux generated on the common core by the common-mode or differential-mode current flowing through the third coupled inductor and the third transformer is partially or completely canceled out.

7. A three-phase integrated magnetic element, characterized in that, include: The system comprises a first coupled inductor, a second coupled inductor, a third coupled inductor, a first transformer with a center tap, a second transformer with a center tap, a third transformer with a center tap, and a magnetic core structure. The magnetic core structure includes: a first magnetic side post, a second magnetic side post, an inductor magnetic cover, a transformer magnetic cover, a first phase-to-phase common magnetic core, a second phase-to-phase common magnetic core, a first phase-to-phase common magnetic core, a second phase-to-phase common magnetic core, a third phase-to-phase common magnetic core, a first inductor magnetic post, a second inductor magnetic post, a third inductor magnetic post, a first transformer magnetic post, a second transformer magnetic post, and a third transformer magnetic post. The first magnetic edge post and the second magnetic edge post are arranged opposite to each other; The inductor magnetic cover and the transformer magnetic cover are disposed between the first magnetic side post and the second magnetic side post, and are disposed opposite to each other; The first phase-to-phase common magnetic core and the second phase-to-phase common magnetic core are respectively disposed between the inductor magnetic cover and the transformer magnetic cover; The first phase common magnetic core is disposed between the inductor magnetic cover and the first phase-to-phase common magnetic core, the second phase common magnetic core is disposed between the first phase-to-phase common magnetic core and the second phase-to-phase common magnetic core, and the third phase common magnetic core is disposed between the second phase-to-phase common magnetic core and the transformer magnetic cover; The first inductor magnetic post is disposed between the inductor magnetic cover and the first phase common magnetic core, the second inductor magnetic post is disposed between the first phase-to-phase common magnetic core and the second phase common magnetic core, and the third inductor magnetic post is disposed between the second phase-to-phase common magnetic core and the third phase common magnetic core; The first transformer magnetic column is disposed between the first phase common magnetic core and the first phase interphase common magnetic core, the second transformer magnetic column is disposed between the second phase common magnetic core and the second phase interphase common magnetic core, and the third transformer magnetic column is disposed between the third phase common magnetic core and the transformer magnetic cover; The first coupling inductor includes a first inductor winding and a second inductor winding. The primary side of the first transformer includes a first transformer primary winding and a second transformer primary winding. The second end of the first inductor winding is connected to the first end of the first transformer primary winding, and the second end of the second transformer primary winding is connected to the first end of the second inductor winding. The second coupling inductor includes a third inductor winding and a fourth inductor winding. The primary side of the second transformer includes a third transformer primary winding and a fourth transformer primary winding. The second end of the third inductor winding is connected to the first end of the second transformer primary winding. The first end of the primary winding of the third transformer is connected to the first end of the primary winding of the fourth transformer, and the second end of the primary winding of the fourth transformer is connected to the first end of the fourth inductor winding; the third coupling inductor includes a fifth inductor winding and a sixth inductor winding, and the primary side of the third transformer includes the primary windings of the fifth and sixth transformers, wherein the second end of the fifth inductor winding is connected to the first end of the primary winding of the fifth transformer, the second end of the primary winding of the fifth transformer is connected to the first end of the primary winding of the sixth transformer, and the second end of the primary winding of the sixth transformer is connected to the first end of the sixth inductor winding; wherein... By adjusting the winding directions of the first and second inductor windings on the first inductor core and the winding directions of the first and second transformer primary windings on the first transformer core, the magnetic flux generated on the first phase common core by the common-mode or differential-mode current flowing through the first coupled inductor and the first transformer is partially or completely canceled; by adjusting the winding directions of the third and fourth inductor windings on the second inductor core and the winding directions of the third and fourth transformer primary windings on the first phase common core, the magnetic flux generated on the first phase common core by the common-mode or differential-mode current flowing through the first coupled inductor and the first transformer is partially or completely canceled; The winding direction on the magnetic pillars of the second transformer is adjusted so that the magnetic flux generated on the common-mode current or differential-mode current flowing through the second coupled inductor and the second transformer is partially or completely canceled out; the winding direction of the fifth inductor winding and the sixth inductor winding on the magnetic pillars of the third inductor and the winding direction of the primary winding of the fifth transformer and the primary winding of the sixth transformer on the magnetic pillars of the third transformer are adjusted so that the magnetic flux generated on the common-mode current or differential-mode current flowing through the third coupled inductor and the third transformer is partially or completely canceled out.

8. The three-phase integrated magnetic element according to claim 7, characterized in that, The differential mode current flowing through the first inductor winding and the second inductor winding generates magnetic flux in the first phase common core in the same direction. The differential mode current flowing through the primary winding of the first transformer and the primary winding of the second transformer generates magnetic flux in the first phase common core in the same direction. The magnetic flux generated by the differential mode current flowing through the first inductor winding and the second inductor winding in the first common core is opposite to the magnetic flux generated by the differential mode current flowing through the primary winding of the first transformer and the primary winding of the second transformer in the first phase common core. The differential-mode current flowing through the third inductor winding and the fourth inductor winding generates magnetic flux in the second phase common core in the same direction. The differential-mode current flowing through the primary winding of the third transformer and the primary winding of the fourth transformer generates magnetic flux in the second phase common core in the same direction. However, the magnetic flux generated by the differential-mode current flowing through the third inductor winding and the fourth inductor winding in the second phase common core is opposite to the magnetic flux generated by the differential-mode current flowing through the primary winding of the third transformer and the primary winding of the fourth transformer in the second phase common core. The differential-mode current flowing through the fifth and sixth inductor windings generates magnetic flux in the same direction on the third-phase common core. The differential-mode current flowing through the primary windings of the fifth and sixth transformers also generates magnetic flux in the same direction on the third-phase common core. However, the direction of the magnetic flux generated by the differential-mode current flowing through the fifth and sixth inductor windings on the third-phase common core is opposite to the direction of the magnetic flux generated by the differential-mode current flowing through the primary windings of the fifth and sixth transformers on the third-phase common core. The direction of the magnetic flux generated on the first inductor column by the differential mode current flowing through the first inductor winding and the second inductor winding is the same as the direction of the magnetic flux generated on the third inductor column by the differential mode current flowing through the fifth inductor winding and the sixth inductor winding. The direction of the magnetic flux generated on the first inductor column by the differential mode current flowing through the first inductor winding and the second inductor winding is opposite to the direction of the magnetic flux generated on the second inductor column by the differential mode current flowing through the third inductor winding and the fourth inductor winding.

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