Integrated transformer, circuit board, and electronic device

Abstract

This application discloses an integrated transformer, circuit board, and electronic device, relating to the field of transformer technology. In this application, a first portion of a first conductor wound on a coil layer formed by a first winding segment, and a first portion of a second conductor wound on a coil layer formed by a third winding segment, respectively constitute two primary winding coils of the transformer; a coil layer formed by a third conductor and a coil layer formed by a fourth conductor respectively constitute two secondary winding coils of the transformer; a second portion of the first conductor wound on a coil layer formed by a second winding segment, and a second portion of the second conductor wound on a coil layer formed by a fourth winding segment, constitute a resonant inductor winding coil. Thus, the transformer and resonant inductor are integrated, occupying a smaller volume, which is beneficial for the miniaturization of electronic devices.

Description

Technical Field

[0001] This application relates to the field of transformer technology, and in particular to an integrated transformer, circuit board, and electronic equipment. Background Technology

[0002] With the development of technology, the requirements for miniaturization of electronic devices are becoming increasingly stringent. In electronic devices, resonant inductors and transformers are independently operating components. In electronic devices with power sources, the resonant inductor and transformer are soldered onto the circuit board separately. This results in the two components occupying a relatively large volume, which is not conducive to the miniaturization of the circuit board and the device itself. Summary of the Invention

[0003] This application aims to address at least one of the technical problems existing in the prior art. To this end, this application proposes an integrated transformer, circuit board, and electronic device that integrates a transformer and a resonant inductor, occupies a small volume, and is beneficial for the miniaturization of electronic devices.

[0004] The integrated transformer according to a first aspect embodiment of this application includes:

[0005] The first winding frame has a first winding segment and a second winding segment spaced apart on its outer side wall along the length direction of the first winding frame.

[0006] The second winding frame is disposed on one side of the first winding frame, and the outer side wall of the second winding frame is provided with a third winding segment and a fourth winding segment at intervals along the length direction of the second winding frame.

[0007] A first conductor, wherein a first portion of the first conductor is wound around the first winding segment, and a second portion of the first conductor is wound around the second winding segment;

[0008] The second conductor, the first part of which is wound around the third winding segment, and the second part of which is wound around the fourth winding segment;

[0009] The third conductor is wound around the first winding segment, and the coil layer formed by the first conductor is located between the coil layer formed by the third conductor and the outer wall of the first winding skeleton.

[0010] The fourth conductor is wound around the third winding segment, and the coil layer formed by the second conductor is located between the coil layer formed by the fourth conductor and the outer wall of the second winding skeleton.

[0011] The integrated transformer according to the embodiments of this application has at least the following beneficial effects: In the integrated transformer of this application, the first portion of the first conductor, the first portion of the second conductor, the third conductor, and the fourth conductor together constitute the transformer. The first portion of the first conductor wound on a coil layer formed by a first winding segment, and the first portion of the second conductor wound on a coil layer formed by a third winding segment, respectively constitute the two primary winding coils of the transformer. The coil layers formed by the third conductor and the fourth conductor respectively constitute the two secondary winding coils of the transformer. The second portion of the first conductor wound on a coil layer formed by a second winding segment, and the second portion of the second conductor wound on a coil layer formed by a fourth winding segment, constitute the resonant inductor winding coil. Thus, the integrated transformer of this application has a compact structure, integrating the transformer and the resonant inductor, occupying a small volume, which is beneficial for the miniaturization of electronic devices. Furthermore, since the resonant inductor winding coil and the primary winding coil are composed of different portions of the same conductor, there is no need for disconnection and reconnection processing; they can be wound in one operation during production, improving production efficiency.

[0012] According to some embodiments of this application, it further includes a first magnetic core, the first winding segment has a first receiving groove inside, the third winding segment has a third receiving groove inside, the first magnetic core has a first base portion, the first base portion has a first protrusion and a second protrusion on opposite sides, the first base portion is located on one side of the first winding segment and the third winding segment, the first protrusion passes through the first receiving groove, and the second protrusion passes through the third receiving groove.

[0013] According to some embodiments of this application, a second magnetic core is further included. The second magnetic core is provided with a second base portion. A third protrusion and a fourth protrusion are respectively provided on opposite sides of the second base portion. The second base portion is provided on one side of the second winding segment and the fourth winding segment. A second receiving groove is provided inside the second winding segment. A fourth receiving groove is provided inside the fourth winding segment. The third protrusion passes through the second receiving groove, and the fourth protrusion passes through the fourth receiving groove.

[0014] According to some embodiments of this application, a third magnetic core is also included, and a fifth receiving groove is further provided inside the first winding skeleton, and the first receiving groove and the second receiving groove are connected through the fifth receiving groove;

[0015] The second winding frame is also provided with a sixth receiving groove. The third receiving groove and the fourth receiving groove are connected through the sixth receiving groove. The sixth receiving groove is connected to the fifth receiving groove. A part of the third magnetic core is engaged in the sixth receiving groove, and another part is engaged in the fifth receiving groove.

[0016] According to some embodiments of this application, a mounting base is also included, which is disposed above the first winding skeleton and the second winding skeleton, and one end of the mounting base is engaged with the first base portion, and the other end of the mounting base is engaged with the second base portion.

[0017] According to some embodiments of this application, the end face of the mounting base is provided with a mounting groove, the mounting groove is used to mount a circuit board, the end of the first portion of the first wire is electrically connected to the circuit board, and the end of the first portion of the second wire is electrically connected to the circuit board.

[0018] According to some embodiments of this application, the mounting base is provided with a plurality of first conductive terminals at one end near the first base portion. The first conductive terminals correspond one-to-one with the two ends of the third wire and the two ends of the fourth wire, and the two ends of the third wire and the two ends of the fourth wire are respectively electrically connected to the corresponding first conductive terminals.

[0019] According to some embodiments of this application, it further includes a fifth wire and a fourth magnetic core, wherein the fourth magnetic core is a toroidal magnetic core, the fourth magnetic core is disposed at one end of the mounting base near the second base, the fifth wire is wound around the fourth magnetic core, and the end of the second portion of the second wire passes through the fourth magnetic core.

[0020] A second aspect of this application provides a circuit board on which an integrated transformer as described in any one of the first aspects of the embodiment is disposed.

[0021] A third aspect of this application provides an electronic device including a circuit board as described in the second aspect embodiment.

[0022] Additional aspects and advantages of this application will be set forth in the description which follows, and the details will become apparent from the description or may be learned by practice of this application. Attached Figure Description

[0023] The present application will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0024] Figure 1 This is an exploded view of the integrated transformer according to an embodiment of this application;

[0025] Figure 2 This is a schematic diagram of the integrated transformer according to an embodiment of this application;

[0026] Figure 3 This is a schematic diagram of the integrated transformer from another angle, according to an embodiment of this application.

[0027] Figure 4This is a schematic diagram of the structure of the first and second winding frames according to an embodiment of this application;

[0028] Figure 5 This is a schematic diagram of the first and second winding frames from another angle, representing an embodiment of this application.

[0029] Figure 6 This is a schematic diagram of the equivalent circuit of the integrated transformer in an embodiment of this application.

[0030] Figure label:

[0031] First wire 110; Second wire 120; Third wire 130; Fourth wire 140; Fifth wire 150; Sixth wire 160; Thermistor 161;

[0032] Mounting base 200; First conductive terminal 201; Mounting slot 210; Circuit board 220;

[0033] First winding frame 300; first winding segment 301; second winding segment 302; first limiting member 310; first notch 311; second limiting member 320; first receiving groove 330; second receiving groove 340; fifth receiving groove 350;

[0034] Second winding frame 400; third winding segment 401; fourth winding segment 402; third limiting member 410; second notch 411; fourth limiting member 420; third receiving groove 430; fourth receiving groove 440; sixth receiving groove 450;

[0035] First protrusion 510; second protrusion 520; first base part 530; third protrusion 610; fourth protrusion 620; second base part 630; third magnetic core part 700. Detailed Implementation

[0036] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0037] In the description of this application, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0038] In the description of this application, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0039] In the description of this application, unless otherwise expressly defined, terms such as "setup," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this application in conjunction with the specific content of the technical solution.

[0040] In the description of this application, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0041] Reference Figures 1 to 6 The first aspect of this application provides an integrated transformer, including a first winding frame 300, a second winding frame 400, a first conductor 110, a second conductor 120, a third conductor 130, and a fourth conductor 140. The outer wall of the first winding frame 300 is provided with first winding segments 301 and second winding segments 302 spaced apart along the length of the first winding frame 300. The second winding frame 400 is disposed on one side of the first winding frame 300, and the outer wall of the second winding frame 400 is provided with third winding segments 401 and fourth winding segments 402 spaced apart along the length of the second winding frame 400. The first conductor 110... The first part is wound on the first winding segment 301, and the second part is wound on the second winding segment 302; the first part of the second conductor 120 is wound on the third winding segment 401, and the second part is wound on the fourth winding segment 402; the third conductor 130 is wound on the first winding segment 301, and the coil layer formed by the first conductor 110 is located between the coil layer formed by the third conductor 130 and the outer wall of the first winding frame 300; the fourth conductor 140 is wound on the third winding segment 401, and the coil layer formed by the second conductor 120 is located between the coil layer formed by the fourth conductor 140 and the outer wall of the second winding frame 400.

[0042] In the integrated transformer of this application embodiment, the first portion of the first conductor 110, the first portion of the second conductor 120, the third conductor 130, and the fourth conductor 140 together constitute the transformer. The first portion of the first conductor 110 wound on the coil layer formed by the first winding segment 301 and the first portion of the second conductor 120 wound on the coil layer formed by the third winding segment 401 respectively constitute the two primary winding coils of the transformer. The coil layers formed by the third conductor 130 and the fourth conductor 140 respectively constitute the two secondary winding coils of the transformer. The second portion of the first conductor 110 wound on the coil layer formed by the second winding segment 302 and the second portion of the second conductor 120 wound on the coil layer formed by the fourth winding segment 402 constitute the resonant inductor winding coil. Thus, the integrated transformer of this application has a compact structure, integrating both the transformer and the resonant inductor, occupying a small volume, which is beneficial for the miniaturization of electronic devices. Furthermore, since the resonant inductor winding coil and the primary winding coil are composed of different portions of the same conductor, there is no need for disconnection and reconnection processing; they can be wound in one operation during production, improving production efficiency.

[0043] In some embodiments, refer to Figure 1 , Figure 4 and Figure 5 The integrated transformer in this embodiment of the application also includes a first magnetic core component. The first winding segment 301 has a first receiving groove 330 inside, and the third winding segment 401 has a third receiving groove 430 inside. The first magnetic core component has a first base portion 530. The first base portion 530 has a first protrusion 510 and a second protrusion 520 on opposite sides. The first base portion 530 is located on one side of the first winding segment 301 and the third winding segment 401. The first protrusion 510 passes through the first receiving groove 330, and the second protrusion 520 passes through the third receiving groove 430.

[0044] It is worth noting that the first magnetic core, the first part of the first conductor 110, the second part of the second conductor 120, the third conductor 130 and the fourth conductor 140 can constitute a complete transformer so that the integrated transformer can function as a transformer. The first protrusion 510 and the second protrusion 520 are used to provide a high magnetic permeability path and greatly enhance the magnetic field strength so that the transformer can operate normally.

[0045] It should be noted that the primary winding coil and the secondary winding coil are wound with single-layer coupling on the top and bottom of Litz wire to achieve a relatively small leakage inductance, reduce the loss between windings, and maximize their efficiency.

[0046] In some embodiments, refer to Figure 1 , Figure 4 and Figure 5The integrated transformer in this embodiment of the application further includes a second magnetic core. The second magnetic core is provided with a second base portion 630. The second base portion 630 is provided with a third protrusion 610 and a fourth protrusion 620 on opposite sides. The second base portion 630 is located on one side of the second winding segment 302 and the fourth winding segment 402. The second winding segment 302 is provided with a second receiving groove 340 inside, and the fourth winding segment 402 is provided with a fourth receiving groove 440 inside. The third protrusion 610 passes through the second receiving groove 340, and the fourth protrusion 620 passes through the fourth receiving groove 440.

[0047] It is worth noting that the second magnetic core, the second part of the first conductor 110, and the second part of the second conductor 120 together constitute a resonant inductor. The third convex part 610 and the fourth convex part 620 are used to provide a high magnetic permeability path, which greatly enhances the magnetic field strength so that the resonant inductor can operate normally.

[0048] In some embodiments, the resonant inductor uses segmented air gaps to adjust the inductance. The segmented air gaps can reduce eddy current losses. Each segment of the air gap uses a ceramic plate or other heat-conducting structure to better dissipate the heat generated by eddy current losses at the air gap, thereby improving product efficiency.

[0049] In some embodiments, the length of the first portion of the first conductor 110 is greater than the length of the second portion, and the length of the first portion of the second conductor 120 is greater than the length of the second portion. Therefore, the number of turns of the coil formed by the first portion of the first conductor 110 is greater than the number of turns of the coil formed by the second portion of the first conductor 110, and the number of turns of the coil formed by the first portion of the second conductor 120 is greater than the number of turns of the coil formed by the second portion of the second conductor 120. Therefore, the length of the first protrusion 510 is greater than the length of the third protrusion 610. The length of the first protrusion 510 is the same as the length of the second protrusion 520; the length of the third protrusion 610 is the same as the length of the fourth protrusion 620. The first protrusion 510 and the second protrusion 520 have the same structure and are parallel. The third protrusion 610 and the fourth protrusion 620 have the same structure and are parallel.

[0050] In some embodiments, the integrated transformer of this application embodiment further includes a third magnetic core 700, and the first winding frame 300 is further provided with a fifth receiving groove 350, and the first receiving groove 330 and the second receiving groove 340 are connected through the fifth receiving groove 350.

[0051] The second winding frame 400 is also provided with a sixth receiving groove 450. The third receiving groove 430 and the fourth receiving groove 440 are connected through the sixth receiving groove 450. The sixth receiving groove 450 is connected to the fifth receiving groove 350. A part of the third magnetic core 700 is engaged in the sixth receiving groove 450, and another part is engaged in the fifth receiving groove 350.

[0052] It is worth noting that the third magnetic core 700 is located between the first magnetic core and the second magnetic core, and there is a certain gap between the third magnetic core 700 and the first protrusion 510; there is a certain gap between the third magnetic core 700 and the third protrusion 610, and the third magnetic core serves as a shared magnetic yoke.

[0053] In some embodiments, the first winding frame 300 and the second winding frame 400 have the same structure and are arranged side by side.

[0054] In some embodiments, refer to Figure 4 and Figure 5 The outer wall of the first winding frame 300 is provided with two first limiting members 310 and two second limiting members 320 spaced apart along the length of the first winding frame 300. A first winding segment 301 is formed between the two first limiting members 310, and a second winding segment 302 is formed between the two second limiting members 320. The second winding frame 400 is located on one side of the first winding frame 300. The outer wall of the second winding frame 400 is provided with two third limiting members 410 and two fourth limiting members 420 spaced apart along the length of the second winding frame 400. A third winding segment 401 is formed between the two third limiting members 410, and a fourth winding segment 402 is formed between the two fourth limiting members 420. The first limiting members 310, second limiting members 320, third limiting members 410, and fourth limiting members 420 are all annular limiting members, used to restrict the coil, prevent the coil from loosening and causing positional changes, and ensure the service life of the integrated transformer. For example, two first limiting members 310 are used to limit the coil formed by the first part of the first conductor 110 and the coil formed by the third conductor 130; two second limiting members 320 are used to limit the coil formed by the second part of the first conductor 110; two third limiting members 410 are used to limit the coil formed by the first part of the second conductor 120 and the coil formed by the fourth conductor 140; and two fourth limiting members 420 are used to limit the coil formed by the second part of the second conductor 120.

[0055] In some embodiments, the first limiting member 310 and the second limiting member 320 are respectively provided with a first notch 311 for the first wire 110 to pass through; the third limiting member 410 and the fourth limiting member 420 are respectively provided with a second notch 411 for the second wire 120 to pass through. Since the first portion of the first wire 110 is wound around the first winding segment 301, and the second portion of the first wire 110 is wound around the second winding segment 302, the first and second portions of the first wire 110 need to be accommodated in the first notch 311 for easy routing. Since the first portion of the second wire 120 is wound around the third winding segment 401, and the second portion of the second wire 120 is wound around the fourth winding segment 402, the first and second portions of the second wire 120 need to be accommodated in the second notch 411 for easy routing.

[0056] In some embodiments, refer to Figure 1 , Figure 2 and Figure 3 The integrated transformer in this application embodiment also includes a mounting base 200, which is disposed above the first winding frame 300 and the second winding frame 400. One end of the mounting base 200 is engaged with the first base part 530, and the other end of the mounting base 200 is engaged with the second base part 630.

[0057] It is worth noting that, since the mounting base 200 engages with the first base part 530 and the second base part 630, separation between the first base part 530, the second base part 630, the first winding bobbin 300, and the second winding bobbin 400 can be avoided. The mounting base 200 can make the positions of the first base part 530, the second base part 630, the first winding bobbin 300, and the second winding bobbin 400 relatively fixed, and the structure is compact.

[0058] In some embodiments, the mounting base 200 has a mounting groove 210 on its end face, and a circuit board 220 is mounted in the mounting groove 210. The end of the first portion of the first wire 110 is electrically connected to the circuit board 220; the end of the first portion of the second wire 120 is also electrically connected to the circuit board 220. The circuit board 220 is equipped with an SMD capacitor, serving as a resonant capacitor board. Thus, the integrated transformer in this embodiment further integrates a resonant capacitor board, enabling the integrated transformer to have a compact structure, achieve multiple functions, and occupy a small volume, which is beneficial for the miniaturization of electronic devices.

[0059] In some embodiments, the mounting base 200 is provided with a plurality of first conductive terminals 201 at one end near the first base portion 530. The first conductive terminals 201 correspond one-to-one with the two ends of the third wire 130 and the two ends of the fourth wire 140, and the two ends of the third wire 130 and the two ends of the fourth wire 140 are respectively electrically connected to the corresponding first conductive terminals 201.

[0060] In some embodiments, the system further includes a fifth conductor 150 and a fourth magnetic core, the fourth magnetic core being a toroidal magnetic core, the fourth magnetic core being disposed at one end of the mounting base 200 near the second base, the fifth conductor 150 being wound around the fourth magnetic core, and the end of the second portion of the second conductor 120 passing through the fourth magnetic core.

[0061] It is worth noting that the fourth magnetic core and the fifth conductor 150 together constitute a current transformer, enabling the integrated transformer to realize the function of a current transformer, further improving the integration, realizing more functions, and occupying a small volume, which is conducive to the miniaturization of electronic devices.

[0062] In some embodiments, the mounting base 200 is provided with two second conductive terminals and two third conductive terminals at one end near the second base. The end of the second portion of the first wire 110 is electrically connected to one of the second conductive terminals, the end of the second portion of the second wire 120 is electrically connected to the other second conductive terminal, and the two ends of the fifth wire 150 are electrically connected to the third conductive terminals one by one.

[0063] In some embodiments, the integrated transformer of this application further includes a thermistor 161, which is disposed between the first winding segment 301 and the third winding segment 401. A fourth conductive terminal is also provided at one end of the mounting base 200 near the second base. The fourth conductive terminal is electrically connected to the thermistor 161 via a sixth wire 160, enabling temperature monitoring through the thermistor 161.

[0064] In some embodiments, refer to Figure 6 , Figure 6 This is a schematic diagram of the equivalent circuit of the integrated transformer according to an embodiment of this application. Figure 6In the diagram, NP1 represents the coil layer formed by the first portion of the first conductor 110, NP2 represents the coil layer formed by the first portion of the second conductor 120, NS1 represents the coil layer formed by the third conductor 130, and NS2 represents the coil layer formed by the fourth conductor 140. Lr1 represents the coil layer formed by the second portion of the first conductor 110, and Lr2 represents the coil layer formed by the second portion of the second conductor 120; C represents the capacitor on the circuit board 220. CT (NS) and CT (NP) represent the coil layer formed by the fifth conductor 150. S1.1, S1.2, S2.1, and S2.2 are the first conductive terminals 201; P1.1 and P2.2 are the second conductive terminals. CS1 and CS2 are the third conductive terminals. NTC is the fourth conductive terminal. The temperature control sensing harness is the sixth conductor 160.

[0065] It is worth noting that the integrated transformer in this application integrates five devices: a transformer, a resonant inductor, a resonant capacitor board, a current transformer, and a thermistor 161. It can achieve multiple functions and has a compact structure with a small footprint, which is beneficial for the miniaturization of electronic devices.

[0066] A second aspect of this application provides a circuit board in which an integrated transformer is provided according to any one of the first aspects of this application.

[0067] Since the circuit board includes the integrated transformer of the first aspect embodiment, the corresponding content of the integrated transformer in the embodiment mentioned in the first aspect is also applicable to the circuit board in the embodiment mentioned in the second aspect, and has the same implementation principle and technical effect. To avoid redundancy, it will not be described in detail here.

[0068] A third aspect of this application provides an electronic device, which includes a circuit board according to a second aspect of this application.

[0069] It should be noted that electronic devices can be power supply devices or other devices equipped with a power source.

[0070] Since the electronic device includes the circuit board of the second aspect embodiment, and the circuit board includes the integrated transformer of the first aspect embodiment, the corresponding content of the integrated transformer in the embodiment mentioned in the first aspect is also applicable to the electronic device in the embodiment mentioned in the third aspect, and has the same implementation principle and technical effect. To avoid redundancy, it will not be described in detail here.

[0071] The embodiments of this application have been described in detail above with reference to the accompanying drawings. However, this application is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of this application. Furthermore, unless otherwise specified, the embodiments and features described in the embodiments of this application can be combined with each other.

Claims

1. An integrated transformer, characterized in that, include: The first winding frame has a first winding segment and a second winding segment spaced apart on its outer side wall along the length direction of the first winding frame. The second winding frame is disposed on one side of the first winding frame, and the outer side wall of the second winding frame is provided with a third winding segment and a fourth winding segment at intervals along the length direction of the second winding frame. A first conductor, wherein a first portion of the first conductor is wound around the first winding segment, and a second portion of the first conductor is wound around the second winding segment; The second conductor, the first part of which is wound around the third winding segment, and the second part of which is wound around the fourth winding segment; The third conductor is wound around the first winding segment, and the coil layer formed by the first conductor is located between the coil layer formed by the third conductor and the outer wall of the first winding skeleton. The fourth conductor is wound around the third winding segment, and the coil layer formed by the second conductor is located between the coil layer formed by the fourth conductor and the outer wall of the second winding skeleton. It also includes a first magnetic core component, the first winding segment has a first receiving groove inside, the third winding segment has a third receiving groove inside, the first magnetic core component has a first base part, the first base part has a first protrusion and a second protrusion on opposite sides, the first base part is located on one side of the first winding segment and the third winding segment, the first protrusion passes through the first receiving groove, and the second protrusion passes through the third receiving groove. It also includes a second magnetic core, which has a second base portion. The second base portion has a third protrusion and a fourth protrusion on opposite sides. The second base portion is located on one side of the second winding segment and the fourth winding segment. The second winding segment has a second receiving groove inside, and the fourth winding segment has a fourth receiving groove inside. The third protrusion passes through the second receiving groove, and the fourth protrusion passes through the fourth receiving groove. It also includes a third magnetic core component, and the first winding frame is further provided with a fifth receiving groove, and the first receiving groove and the second receiving groove are connected through the fifth receiving groove; The second winding frame is also provided with a sixth receiving groove. The third receiving groove and the fourth receiving groove are connected through the sixth receiving groove. The sixth receiving groove is connected to the fifth receiving groove. A part of the third magnetic core is engaged in the sixth receiving groove, and another part is engaged in the fifth receiving groove.

2. The integrated transformer according to claim 1, characterized in that, It also includes a mounting base, which is disposed above the first winding skeleton and the second winding skeleton, with one end of the mounting base engaging with the first base part and the other end of the mounting base engaging with the second base part.

3. The integrated transformer according to claim 2, characterized in that, The mounting base has a mounting groove on its end face, and a circuit board is mounted in the mounting groove. The end of the first part of the first wire is electrically connected to the circuit board; the end of the first part of the second wire is electrically connected to the circuit board.

4. The integrated transformer according to claim 3, characterized in that, The mounting base is provided with a plurality of first conductive terminals at one end near the first base part. Each first conductive terminal corresponds to one end of the third wire and one end of the fourth wire. The two ends of the third wire and the two ends of the fourth wire are respectively electrically connected to the corresponding first conductive terminals.

5. The integrated transformer according to claim 4, characterized in that, It also includes a fifth conductor and a fourth magnetic core, wherein the fourth magnetic core is a toroidal magnetic core and is disposed at one end of the mounting base near the second base portion. The fifth conductor is wound around the fourth magnetic core, and the end of the second portion of the second conductor passes through the fourth magnetic core.

6. A circuit board, characterized in that, The circuit board is provided with an integrated transformer as described in any one of claims 1 to 5.

7. An electronic device, characterized in that, Including the circuit board as described in claim 6.

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