Integrated magnetic part and converter

Abstract

The utility model discloses an integrated magnetic piece and a converter. The integrated magnetic part comprises a magnetic core which comprises a first magnetic column and at least one second magnetic column; the transformer comprises at least two transformer coils wound on the first magnetic column; and at least one mutual coupling inductor, each mutual coupling inductor comprises two inductance coils which are wound on the corresponding second magnetic column and are mutually coupled, at least one transformer coil is connected in series with the corresponding mutual coupling inductor, and the transformer coil is connected in series between the two inductance coils of the corresponding mutual coupling inductor. According to the integrated magnetic piece provided by the embodiment of the utility model, the integrated magnetic piece can reduce common-mode interference caused by a transformer by occupying a smaller volume.

Description

Technical Field

[0001] The utility model relates to the field of electromagnetic devices, in particular to an integrated magnetic component and a converter. Background Art

[0002] When a planar transformer is used in a converter system, the common-mode capacitance between the primary winding and the secondary winding of the planar transformer is relatively large, which may cause common-mode interference problems in the converter system.

[0003] In the prior art, in order to solve the common-mode interference problem, other bulky device structures are usually added, which makes the overall volume of the system too large. Utility Model Content

[0004] The utility model provides an integrated magnetic component and a converter. The integrated magnetic component can reduce the common mode interference caused by a transformer with a smaller volume.

[0005] In a first aspect, an embodiment of the utility model provides an integrated magnetic component, which includes: a magnetic core, including a first magnetic column and at least one second magnetic column; a transformer, including at least two transformer coils wound around the first magnetic column; and at least one mutually coupled inductor, each of the mutually coupled inductors including two inductor coils wound around a corresponding one of the second magnetic columns and coupled to each other, at least one of the transformer coils being connected in series with the corresponding mutually coupled inductor, wherein the transformer coil is connected in series between the two inductor coils corresponding to the mutually coupled inductors.

[0006] According to the integrated magnetic component of the embodiment of the utility model, at least one mutually coupled inductor is integrated with the transformer in the same magnetic core, the transformer includes at least two transformer coils, and each mutually coupled inductor includes two inductor coils that are wound around a corresponding second magnetic column and coupled to each other. At least one transformer coil is connected in series with the corresponding mutually coupled inductor, wherein the transformer coil is connected in series between the two inductor coils of the corresponding mutually coupled inductor. In the above structure, the series structure of the mutually coupled inductor and the transformer coil is used to reduce the common mode interference caused by the transformer, and the two mutually coupled inductor coils of the mutually coupled inductor are wound around a corresponding second magnetic column, thereby obtaining an integrated magnetic component including a transformer with a smaller volume. In addition, compared with the solution of using discrete inductors to reduce common mode interference, the above integrated magnetic component has lower loss and higher efficiency.

[0007] According to the aforementioned implementation of the first aspect of the utility model, the two inductor coils of each mutually coupled inductor are wound in opposite directions on the corresponding second magnetic column.

[0008] According to any of the aforementioned implementations of the first aspect of the utility model, in the mutual coupling inductor connected in series with the transformer coil, a pair of non-same-name ends of the mutual coupling inductor are respectively connected to two ends of the corresponding transformer coil.

[0009] According to any of the aforementioned implementations of the first aspect of the utility model, the number of the mutual coupling inductors is less than or equal to the number of the transformer coils, and each of the mutual coupling inductors is connected in series with a corresponding one of the transformer coils.

[0010] According to any of the aforementioned implementations of the first aspect of the utility model, the number of the mutual coupling inductor is single, and the single mutual coupling inductor is connected in series with one of the transformer coils in the transformer.

[0011] According to any of the aforementioned implementations of the first aspect of the utility model, the transformer is a single-phase transformer, the transformer includes two transformer coils, and the at least one mutual coupling inductor includes a first mutual coupling inductor and a second mutual coupling inductor.

[0012] According to any of the aforementioned implementations of the first aspect of the utility model, one of the transformer coils of the transformer is connected in series with the first mutual coupling inductor, and another of the transformer coils of the transformer is connected in series with the second mutual coupling inductor.

[0013] According to any of the aforementioned implementations of the first aspect of the utility model, the transformer is a multi-port transformer, and the transformer includes more than three transformer coils; the number of the mutual coupling inductors is the same as the number of the transformer coils and they are connected in series one by one, wherein each transformer coil is connected in series between two of the inductor coils corresponding to the mutual coupling inductors.

[0014] In a second aspect, an embodiment of the utility model provides a converter, comprising: an integrated magnetic component according to any of the foregoing embodiments of the first aspect of the utility model, the integrated magnetic component having at least two ports, the number of the ports being the same as the number of the transformer coils in the integrated magnetic component; at least two switch bridges, each of the switch bridges being connected to a corresponding one of the ports.

[0015] According to the converter of the embodiment of the utility model, it includes an integrated magnetic component and a switch bridge, the mutual coupling inductor in the integrated magnetic component is integrated with the transformer in the same magnetic core, the transformer includes at least two transformer coils, each mutual coupling inductor includes two inductor coils wound around a corresponding second magnetic column and coupled to each other. At least one transformer coil is connected in series with the corresponding mutual coupling inductor, wherein the transformer coil is connected in series between the two inductor coils of the corresponding mutual coupling inductor. In the above structure, the series structure of the mutual coupling inductor and the transformer coil is used to reduce the common mode interference caused by the transformer, which is beneficial to alleviate the filtering pressure of the front-stage electromagnetic interference (EMI) filter, and the two inductor coils of the mutual coupling inductor are coupled to each other and are wound around a corresponding second magnetic column, so as to obtain an integrated magnetic component including a transformer with a smaller volume, which is convenient for ensuring that the converter has a smaller volume.

[0016] According to any of the aforementioned implementations of the second aspect of the utility model, each of the ports is connected to the corresponding switch bridge via a connecting line, so that the converter is equivalent to a dual active bridge converter.

[0017] According to any of the aforementioned implementations of the second aspect of the utility model, each of the ports includes two nodes correspondingly connected to the two ends of the corresponding transformer coil, and a passive device is connected between each of the nodes of at least one of the ports and the corresponding switch bridge. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0019] Figure 1 This is a schematic structural diagram of the first embodiment of the integrated magnetic component of the utility model;

[0020] Figure 2 This is an equivalent circuit diagram of the first embodiment of the integrated magnetic component of the utility model;

[0021] Figure 3 This is a schematic structural diagram of a second embodiment of the integrated magnetic component of the utility model;

[0022] Figure 4 This is an equivalent circuit diagram of the second embodiment of the integrated magnetic component of the utility model;

[0023] Figure 5 It is a structural schematic diagram of the third embodiment of the integrated magnetic component of the utility model;

[0024] Figure 6 This is an equivalent circuit diagram of the third embodiment of the integrated magnetic component of the utility model;

[0025] Figure 7 It is a structural block diagram of the first embodiment of the converter of the utility model;

[0026] Figure 8 The equivalent circuit diagram of the first embodiment of the converter of the utility model;

[0027] Fig. 9 It is a structural block diagram of the second embodiment of the converter of the utility model;

[0028] Fig.10 is an equivalent circuit diagram of the second embodiment of the converter of the utility model;

[0029] Fig.11 It is a structural block diagram of the third embodiment of the converter of the utility model;

[0030] Fig.12 FIG. 4 is an equivalent circuit diagram of the third embodiment of the converter of the utility model.

[0031] Description of reference numerals:

[0032] 100-integrated magnetic components;

[0033] 110 - magnetic core; 111 - first magnetic column; 112 - second magnetic column;

[0034] 120-transformer; 121-transformer coil; 121a-first transformer coil; 121b-second transformer coil; 121c-third transformer coil;

[0035] 130-mutual coupling inductor; 130a-first mutual coupling inductor; 130b-second mutual coupling inductor; 130c-third mutual coupling inductor; 131-inductor coil;

[0036] 200- switch bridge;

[0037] 300-Passive components.

[0038] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with the embodiments with reference to the accompanying drawings. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0040] It should be noted that all directional indications such as up, down, left, right, front, back... in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture as shown in the accompanying drawings. If the specific posture changes, the directional indication will also change accordingly.

[0041] In addition, the descriptions of "first", "second", etc. in the present utility model are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0042] Magnetic components, also known as magnetic parts, are electrical components used for energy storage or energy conversion. Magnetic components usually include a magnetic core and a coil structure wound on the magnetic core in a specific way. Integrated magnetic parts are electromagnetic devices that integrate multiple magnetic parts into one device structure by sharing a part of the magnetic core with multiple magnetic parts.

[0043] An embodiment of the utility model provides an integrated magnetic component. Figure 1 This is a schematic structural diagram of the first embodiment of the integrated magnetic component of the utility model. Figure 2 The equivalent circuit diagram of the first embodiment of the integrated magnetic component of the utility model is as follows: The integrated magnetic component 100 includes a magnetic core 110 , a transformer 120 and at least one mutually coupled inductor 130 .

[0044] The magnetic core 110 includes a first magnetic column 111 and at least one second magnetic column 112. The transformer 120 includes at least two transformer coils 121 wound around the first magnetic column 111. Each mutual coupling inductor 130 includes two inductor coils 131 wound around a corresponding second magnetic column 112 and coupled to each other. At least one transformer coil 121 is connected in series with the corresponding mutual coupling inductor 130, wherein the transformer coil 121 is connected in series between the two inductor coils 131 of the corresponding mutual coupling inductor 130.

[0045] According to the integrated magnetic component 100 of the embodiment of the utility model, at least one mutual coupling inductor 130 is integrated with the transformer 120 in the same magnetic core 110, and the transformer 120 includes at least two transformer coils 121, and each mutual coupling inductor 130 includes two inductor coils 131 wound around a corresponding second magnetic column 112 and coupled to each other. At least one transformer coil 121 is connected in series with the corresponding mutual coupling inductor 130, wherein the transformer coil 121 is connected in series between the two inductor coils 131 of the corresponding mutual coupling inductor 130. In the related art, parasitic common-mode capacitance is formed between the transformer coils 121 of the transformer 120, and when the ports of the transformer coils 121 of the transformer 120 are connected to other devices, the parasitic common-mode capacitance will form common-mode interference to the devices connected to the ports. In the structure of the above-mentioned embodiment of the utility model, the two inductance coils 131 of the mutual coupling inductor 130 are respectively connected to the two ends of the transformer coil 121, and the two inductance coils 131 of the mutual coupling inductor 130 are coupled to each other, which isolates the influence of the above-mentioned parasitic common-mode capacitance on other devices connected to the ports of the transformer coil 121 to a certain extent, that is, reduces the common-mode interference. The structure of the above-mentioned embodiment of the utility model reduces the common-mode interference caused by the transformer 120 by utilizing the series structure of the mutual coupling inductor 130 and the transformer coil 121, and the two mutually coupled inductance coils 131 of the mutual coupling inductor 130 are wound around a corresponding second magnetic column 112, thereby obtaining an integrated magnetic component 100 including the transformer 120 with a smaller volume. In addition, compared with the solution of using discrete inductors to reduce common-mode interference, the above-mentioned integrated magnetic component 100 has lower loss and higher efficiency.

[0046] The number of mutual coupling inductors 130 is less than or equal to the number of transformer coils 121, and each mutual coupling inductor 130 is connected in series with a corresponding transformer coil 121. The number of mutual coupling inductors 130 is less than or equal to the number of transformer coils 121. Therefore, according to the common mode interference strength of the specific transformer coil 121 in the transformer 120 to the connected device at the port, and the transformer coil 121 corresponding to the port to which the device that needs to reduce interference is connected, the number of mutual coupling inductors 130 can be flexibly configured. In the first embodiment, the number of mutual coupling inductors 130 is single, and a single mutual coupling inductor 130 is connected in series with a transformer coil 121 in the transformer 120. Therefore, in the above-mentioned first embodiment, the number of mutual coupling inductors 130 is single and less than the number of transformer coils 121. On the basis of ensuring that the device that needs to reduce interference is configured accordingly, excessive setting of inductor devices is avoided, thereby ensuring that the integrated magnetic component 100 maintains a small volume occupancy.

[0047] In the first embodiment, the transformer 120 is a single-phase transformer 120, and the transformer 120 includes two transformer coils 121, one of the two transformer coils 121 is a primary winding, and the other is a secondary winding. A single mutual coupling inductor 130 is connected in series with either the primary winding or the secondary winding. According to the interference reduction requirements of the devices connected to the ports of the primary winding and the secondary winding, it is only necessary to connect the mutual coupling inductor 130 in series with either the primary winding or the secondary winding to ensure that the integrated magnetic component 100 maintains a small volume occupation. In one example, the port of the primary winding of the transformer 120 is connected to a device module including a switch tube, and high-frequency common-mode interference easily causes the switch tube at the port of the primary winding to be unable to achieve zero voltage switching (Zero Voltage Switch, ZVS), so a single mutual coupling inductor 130 is connected in series with the primary winding, which can not only achieve ZVS of the switch tube at the port of the primary winding, but also avoid the overall volume of the integrated magnetic component 100 being too large.

[0048] In this embodiment, the two inductance coils 131 of each mutual coupling inductor 130 are wound in opposite directions on the corresponding second magnetic column 112. In this embodiment, in the mutual coupling inductor 130 connected in series with the transformer coil 121, a pair of non-same-name ends of the mutual coupling inductor 130 are respectively connected to the two ends of the corresponding transformer coil 121. In this embodiment, the two inductance coils 131 of each mutual coupling inductor 130 are wound in opposite directions, so that the two inductance coils 131 have opposite phases and achieve coupling of the two inductance coils 131, thereby ensuring effective isolation of the common mode capacitance parasitic at the transformer coil 121.

[0049] Figure 3 This is a schematic structural diagram of the second embodiment of the integrated magnetic component of the utility model. Figure 4 This is an equivalent circuit diagram of the second embodiment of the integrated magnetic component of the utility model. The integrated magnetic component 100 includes a magnetic core 110, a transformer 120 and at least one mutual coupling inductor 130. The magnetic core 110 includes a first magnetic column 111 and at least one second magnetic column 112. The transformer 120 includes at least two transformer coils 121 wound around the first magnetic column 111. Each mutual coupling inductor 130 includes two inductor coils 131 wound around a corresponding second magnetic column 112 and coupled to each other. At least one transformer coil 121 is connected in series with the corresponding mutual coupling inductor 130, wherein the transformer coil 121 is connected in series between the two inductor coils 131 of the corresponding mutual coupling inductor 130.

[0050] In the second embodiment, the transformer 120 is a single-phase transformer 120, and the transformer 120 includes two transformer coils 121, one of the two transformer coils 121 is a primary winding, and the other is a secondary winding. In this embodiment, the two transformer coils 121 include a first transformer coil 121a and a second transformer coil 121b. At least one mutual coupling inductor 130 includes a first mutual coupling inductor 130a and a second mutual coupling inductor 130b. One of the transformer coils 121 of the transformer 120 is connected in series with the first mutual coupling inductor 130a, and the other transformer coil 121 of the transformer 120 is connected in series with the second mutual coupling inductor 130b. The two inductor coils 131 of each mutual coupling inductor 130 are wound in opposite directions on the corresponding second magnetic column 112. A pair of non-same-name ends of the first mutual coupling inductor 130a are respectively connected to the two ends of the first transformer coil 121a, and a pair of non-same-name ends of the second mutual coupling inductor 130b are respectively connected to the two ends of the second transformer coil 121b.

[0051] In the above embodiment, the transformer 120 includes two transformer coils 121, namely, a primary winding and a secondary winding, and the mutual coupling inductor 130 includes a first mutual coupling inductor 130a and a second mutual coupling inductor 130b. The primary winding and the secondary winding are each connected in series with a corresponding mutual coupling inductor 130. The first mutual coupling inductor 130a effectively isolates the common-mode interference of the transformer 120 at the port of the first transformer coil 121a, and the second mutual coupling inductor 130b effectively isolates the common-mode interference of the transformer 120 at the port of the second transformer coil 121b, thereby achieving complete shielding of the common-mode interference generated by the transformer 120, and further improving the reliability of the integrated magnetic component 100.

[0052] In some embodiments, the transformer 120 is a multi-port transformer, and the transformer 120 includes more than three transformer coils 121. Each port includes two nodes corresponding to the two ends of the corresponding transformer coil 121. The number of the mutual coupling inductors 130 is the same as the number of the transformer coils 121 and they are connected in series one by one, wherein each transformer coil 121 is connected in series between the two inductor coils 131 of the corresponding mutual coupling inductor 130.

[0053] Figure 5 This is a schematic structural diagram of the third embodiment of the integrated magnetic component of the utility model. Figure 6 FIG. 1 is an equivalent circuit diagram of the third embodiment of the integrated magnetic component of the utility model. In the third embodiment, the transformer 120 is a multi-port transformer, such as a three-port transformer.

[0054] The transformer 120 includes three transformer coils 121. In this embodiment, the three transformer coils 121 include a first transformer coil 121a, a second transformer coil 121b, and a third transformer coil 121c. At least one mutual coupling inductor 130 includes a first mutual coupling inductor 130a, a second mutual coupling inductor 130b, and a third mutual coupling inductor 130c. The first transformer coil 121a of the transformer 120 is connected in series with the first mutual coupling inductor 130a, the second transformer coil 121b of the transformer 120 is connected in series with the second mutual coupling inductor 130b, and the third transformer coil 121c of the transformer 120 is connected in series with the third mutual coupling inductor 130c. The two inductance coils 131 of each mutual coupling inductor 130 are wound in opposite directions on the corresponding second magnetic column 112. Each transformer coil 121 is connected in series between the two inductance coils 131 of the corresponding mutual coupling inductor 130.

[0055] In the above embodiment, the transformer 120 includes more than three transformer coils 121, that is, the transformer 120 is a multi-port transformer, and the number of mutual coupling inductors 130 is the same as the number of transformer coils 121 and they are connected in series one by one. These mutual coupling inductors 130 effectively isolate the common-mode interference acting on each port of the transformer 120, thereby achieving complete shielding of the common-mode interference generated by the transformer 120, thereby improving the reliability of the integrated magnetic component 100.

[0056] In some other embodiments, the transformer 120 may further include six, eight or other numbers of transformer coils 121 , and the number of the mutual coupling inductors 130 may be equal to or less than the number of the transformer coils 121 .

[0057] The embodiment of the utility model also provides a converter. Figure 7 This is a structural block diagram of the first embodiment of the converter of the utility model, and the converter includes an integrated magnetic component 100 of any of the aforementioned embodiments and at least two switch bridges 200. The integrated magnetic component 100 includes a magnetic core 110, a transformer 120 and at least one mutual coupling inductor 130. The magnetic core 110 includes a first magnetic column 111 and at least one second magnetic column 112. The transformer 120 includes at least two transformer coils 121 wound around the first magnetic column 111. Each mutual coupling inductor 130 includes two inductor coils 131 wound around a corresponding second magnetic column 112 and coupled to each other. At least one transformer coil 121 is connected in series with the corresponding mutual coupling inductor 130, wherein the transformer coil 121 is connected in series between the two inductor coils 131 of the corresponding mutual coupling inductor 130.

[0058] The integrated magnetics 100 has at least two ports, and the number of the ports is the same as the number of the transformer coils 121 in the integrated magnetics 100. Each switch bridge 200 is connected to a corresponding port.

[0059] The switch bridge 200 is a half-bridge or full-bridge circuit including at least one of power switch tubes such as a metal-oxide-semiconductor field-effect transistor (MOSFET), an insulated-gate bipolar transistor (IGBT), and a diode.

[0060] According to the converter of the embodiment of the utility model, it includes an integrated magnetic component 100 and a switch bridge 200. The mutual coupling inductor 130 in the integrated magnetic component 100 and the transformer 120 are integrated in the same magnetic core 110. The transformer 120 includes at least two transformer coils 121. Each mutual coupling inductor 130 includes two inductor coils 131 wound around a corresponding second magnetic column 112 and coupled to each other. At least one transformer coil 121 is connected in series with the corresponding mutual coupling inductor 130, wherein the transformer coil 121 is connected in series between the two inductor coils 131 of the corresponding mutual coupling inductor 130. In the related art, parasitic common-mode capacitance is formed between the transformer coils 121 of the transformer 120. The parasitic common-mode capacitance will form common-mode interference on the switch bridge 200. The common-mode interference easily causes some switch tubes in the switch bridge 200 to fail to achieve ZVS, thereby easily causing some switch tubes to have a higher temperature rise. In the structure of the above embodiment of the utility model, the two inductance coils 131 of the mutual coupling inductor 130 are respectively connected to the two ends of the transformer coil 121, and the two inductance coils 131 of the mutual coupling inductor 130 are coupled to each other, which isolates the influence of the above parasitic common-mode capacitance on the switch bridge 200 to a certain extent, that is, reduces the influence of common-mode interference on the switch bridge 200. The structure of the above embodiment of the utility model reduces the common-mode interference caused by the transformer 120 by using the series structure of the mutual coupling inductor 130 and the transformer coil 121, which is conducive to relieving the filtering pressure of the front-stage electromagnetic interference (EMI) filter, and the two mutually coupled inductance coils 131 of the mutual coupling inductor 130 are wound around a corresponding second magnetic column 112, so as to obtain an integrated magnetic component 100 including the transformer 120 with a smaller volume, which is convenient for ensuring that the converter has a smaller volume.

[0061] Figure 8 The equivalent circuit diagram of the first embodiment of the converter of the utility model is shown in FIG. 1. In this embodiment, each port is connected to a corresponding switch bridge 200 via a connecting line, so that the converter is equivalent to a dual active bridge converter (DAB).

[0062] Fig. 9This is a structural block diagram of the second embodiment of the converter of the utility model. In some embodiments, each port includes two nodes correspondingly connected to the two ends of the corresponding transformer coil 121, and a passive device 300 is connected between each node of at least one port and the corresponding switch bridge 200. The passive device 300 is an inductor, a capacitor, or a series-parallel combination of an inductor and / or a capacitor.

[0063] Fig.10 This is an equivalent circuit diagram of the second embodiment of the converter of the utility model. In this embodiment, the integrated magnetic component 100 includes two ports, wherein a passive device 300 is connected between the two nodes of one port and the corresponding switch bridge 200, and the passive device 300 is, for example, a capacitor, and the other port is connected to the corresponding switch bridge 200 through a connecting line, so that the converter is equivalent to an LLC converter.

[0064] Fig.11 is a structural block diagram of the third embodiment of the converter of the utility model, Fig.12 This is an equivalent circuit diagram of the third embodiment of the converter of the utility model. In this embodiment, the integrated magnetic component 100 includes two ports, and a passive device 300 is connected between the two nodes of each port and the corresponding switch bridge 200. The passive device 300 is, for example, a capacitor, so that the converter is equivalent to a CLLC converter.

[0065] In some other embodiments, the passive device 300 may also be an inductor or other combined circuit structures, so that the converter can be equivalent to other converters.

[0066] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. An integrated magnetic component, characterized in that: include: A magnetic core, comprising a first magnetic column and at least one second magnetic column; A transformer, comprising at least two transformer coils wound around the first magnetic column; as well as at least one mutually coupled inductor, each of the mutually coupled inductors comprising two inductor coils wound around a corresponding second magnetic column and coupled to each other, At least one of the transformer coils is connected in series with the corresponding mutual coupling inductor, wherein the transformer coil is connected in series between two of the inductor coils corresponding to the mutual coupling inductor.

2. The integrated magnetic component according to claim 1, characterized in that: The two inductor coils of each mutually coupled inductor are wound in opposite directions on the corresponding second magnetic column.

3. The integrated magnetic component according to claim 1, characterized in that: In the mutual coupling inductor connected in series with the transformer coil, a pair of non-same-name ends of the mutual coupling inductor are respectively connected to two ends of the corresponding transformer coil.

4. The integrated magnetic component according to claim 1, characterized in that: The number of the mutual coupling inductors is less than or equal to the number of the transformer coils, and each of the mutual coupling inductors is connected in series with a corresponding one of the transformer coils.

5. The integrated magnetic component according to claim 1, characterized in that: The number of the mutual coupling inductor is single, and the single mutual coupling inductor is connected in series with one of the transformer coils in the transformer.

6. The integrated magnetic component according to claim 1, characterized in that: The transformer is a single-phase transformer, the transformer includes two transformer coils, and the at least one mutual coupling inductor includes a first mutual coupling inductor and a second mutual coupling inductor.

7. The integrated magnetic component according to claim 6, characterized in that: One of the transformer coils of the transformer is connected in series with the first mutual coupling inductor, and the other transformer coil of the transformer is connected in series with the second mutual coupling inductor.

8. The integrated magnetic component according to claim 1, characterized in that: The transformer is a multi-port transformer, and the transformer comprises more than three transformer coils; The number of the mutual coupling inductors is the same as the number of the transformer coils and they are connected in series one by one, wherein each transformer coil is connected in series between two of the inductor coils corresponding to the mutual coupling inductors.

9. A converter, characterized in that: include: The integrated magnetic component according to any one of claims 1 to 8, wherein the integrated magnetic component has at least two ports, and the number of the ports is the same as the number of the transformer coils in the integrated magnetic component; At least two switch bridges, each of the switch bridges is connected to a corresponding one of the ports.

10. The converter according to claim 9, characterized in that Each of the ports is connected to the corresponding switch bridge via a connecting line, so that the converter is equivalent to a dual active bridge converter.

11. The converter according to claim 9, characterized in that Each of the ports includes two nodes correspondingly connected to two ends of a corresponding transformer coil, and a passive device is connected between each node of at least one of the ports and the corresponding switch bridge.

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