Magnetic integrated transformer, electrical equipment and vehicle

Abstract

The invention provides a magnetic integrated transformer, electrical equipment and a vehicle, the magnetic integrated transformer comprises a main magnetic core, a leakage inductance magnetic core, a skeleton assembly, a primary winding and a secondary winding, the skeleton assembly comprises a main skeleton and a side skeleton, the main skeleton is provided with a central ring column and two main baffles, the leakage inductance magnetic core is arranged in the side skeleton, and the secondary winding is arranged in the central ring column. The side framework is connected with the main baffle plate at the corresponding end, the primary winding is wound on the main framework, and the secondary winding is wound on the peripheries of the leakage inductance magnetic core and the primary winding. According to the scheme, winding of the winding and assembling of the magnetic core are facilitated, the leakage inductance magnetic core is easy to assemble and accurate and stable in position, a leakage inductance magnetic field passes through the leakage inductance magnetic core with high magnetic permeability, the size occupied by the leakage inductance magnetic circuit can be greatly reduced, and therefore the overall size of the device is reduced, and by controlling the size of an air gap between the magnetic cores, the reliability of the device is improved. The magnitude of the needed leakage inductance can be accurately controlled, the leakage inductance magnetic field is mainly concentrated in one or more magnetic cores, the loss of the high-frequency effect is effectively reduced, and the efficiency of the converter is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of transformers, and in particular to a magnetic integrated transformer, electrical equipment and a vehicle. Background Art

[0002] The on-board power supply of new energy vehicles, including on-board chargers (OBC) and on-board DCDC, mainly adopts isolated conversion circuit topologies such as CLLLC resonant converters, DAB converters, and phase-shifted full-bridge converters. The common feature of these circuits is that, in addition to an isolation transformer, a resonant inductor is connected in series with the primary and / or secondary windings of the transformer. In early power supply products, the transformer and the resonant inductor were two or three independent devices, which were large in size and high in cost. With the development of magnetic integration technology, more and more products integrate these devices into one device, saving volume and reducing costs. Among them, the most traditional magnetic integration method is to separate the primary winding and the secondary winding of the transformer by a certain distance in physical space, so that the two windings cannot be fully coupled to form a large leakage inductance, and use this leakage inductance as the resonant inductor in the circuit.

[0003] The above-mentioned traditional transformer, especially the magnetic integration method with separate winding of the primary and secondary sides, has the following disadvantages. First, the leakage inductance magnetic circuit mainly runs through the air gap. In order to achieve a larger inductance, the distance between the primary and secondary windings will be relatively large, so the volume of the integrated device is still relatively large. Secondly, the size of the leakage inductance is mainly related to the structure of the transformer, and the size of the required resonant inductance cannot be accurately controlled. Furthermore, a large part of the leakage inductance magnetic field will pass through the primary and secondary winding coils, and the high-frequency effect will cause additional power consumption of the coil, reducing the efficiency of the converter and increasing the difficulty of heat dissipation of the device.

[0004] In addition, the heat dissipation method of the on-board power supply of new energy vehicles is mainly water cooling. In particular, in order to cooperate with the power tube chip cooling method, the flat water cooling method will become the mainstream heat dissipation method of the on-board power supply. For magnetic components, how to fully conduct their own heat to the water cooling surface will be a big test.

[0005] The existing general transformers mainly adopt a structure in which the magnetic core wraps the winding, and the winding is the main heat source in the magnetic component. Due to the wrapping and blocking effect of the magnetic core, the heat of the winding is difficult to be smoothly transferred to the water-cooled heat dissipation surface, which in turn affects the overall heat dissipation effect. Summary of the invention

[0006] The first object of the present invention is to provide a magnetic integrated transformer which is easy to manufacture and can accurately control the resonant inductance.

[0007] A second object of the present invention is to provide an electrical device having the above magnetic integrated transformer.

[0008] A third object of the present invention is to provide a vehicle having the above magnetic integrated transformer.

[0009] In order to achieve the first purpose of the present invention, the present invention provides a magnetic integrated transformer, including a main magnetic core, a leakage inductance magnetic core, a skeleton assembly, a primary winding and a secondary winding; the skeleton assembly includes a main skeleton and a side skeleton, the main skeleton is provided with a central ring column and two main baffles, the two main baffles are respectively located at the two ends of the central ring column in the height direction, the interior of the central ring column is penetrated by a through hole along the height direction, a first wire groove is formed on the outer periphery of the central ring column, and the primary winding is wound in the first wire groove; the side skeleton extends in the height direction, and an installation groove is provided inside the side skeleton, the end of the side skeleton located in the height direction is connected to the main baffle at the corresponding end, the leakage inductance magnetic core is located in the installation groove and between the two main baffles, a second wire groove is formed on the outer periphery of the side skeleton, the secondary winding is wound in the second wire groove, and the secondary winding is wound around the outer periphery of the leakage inductance magnetic core and the primary winding; the main magnetic core includes two beams, a side column and a core column, the side column and the core column are respectively connected between the two beams, the core column passes through the through hole, and the side column is located on the outer side of the second wire groove.

[0010] It can be seen from the above scheme that the primary winding is first wound around the main skeleton, and the leakage inductance core is pre-installed into the mounting groove of the side skeleton. As the side skeleton is connected to the main baffle of the main skeleton, the leakage inductance core is accurately installed and positioned. Then the secondary winding is wound in the second wire slot and around the leakage inductance core and the periphery of the primary winding. Finally, the main magnetic core is assembled to complete the assembly. This scheme is not only convenient for the winding of the winding and the assembly of the magnetic core, but also the assembly of the leakage inductance core is simple and the position is accurate and stable. Moreover, the leakage inductance magnetic field passes through the leakage inductance core with high magnetic permeability instead of air, and the volume occupied by the leakage inductance magnetic circuit will be greatly reduced, thereby reducing the overall volume of the device. By controlling the size of the air gap between the magnetic cores, the size of the required leakage inductance can be very accurately controlled. The leakage inductance magnetic field is mainly concentrated in one or several magnetic cores and will not be scattered in the wire packages of the primary and secondary sides, thereby reducing the loss of high-frequency effects and improving the efficiency of the converter.

[0011] A further solution is that the side frame is provided with a side peripheral wall and two side baffles, the side peripheral wall extends along the height direction, the two side baffles are respectively connected to the two ends of the side peripheral wall in the height direction, and an installation groove is provided inside the side peripheral wall, and one end of the side baffle is connected to the main baffle at the corresponding end.

[0012] As can be seen from the above, the installation groove is surrounded by the side peripheral wall and the two side baffles, and the side baffle walls can be used to facilitate the positioning connection with the main baffle.

[0013] A further solution is that the side baffle is provided with a slot, and the main baffle is inserted into the slot.

[0014] As can be seen from the above, through the cooperation between the main baffle and the slot, the side frame can be accurately installed and positioned.

[0015] A further solution is that the side baffle is provided with a first clamping portion, the main baffle is provided with a second clamping portion, and the first clamping portion is engaged with the second clamping portion.

[0016] A further solution is that the side baffle is provided with a first connecting hole, the main baffle is provided with a second connecting hole, and the first connecting hole and the second connecting hole are connected by rivets.

[0017] As can be seen from the above, there are many ways of fixing and connecting, including snap or rivet connection, which are convenient for assembly and positioning.

[0018] A further solution is that the installation groove is provided with an installation opening facing the central ring column, and the side frame is provided with limiting clamping parts on both sides of the installation opening.

[0019] As can be seen from the above, the leakage inductance core can be loaded from the loading port, and the limiting clamps on both sides are helpful to limit and fix the leakage inductance core, thereby making the leakage inductance core accurately positioned.

[0020] A further solution is that the magnetic integrated transformer includes multiple leakage inductance cores, the side frame is provided with multiple installation slots, the multiple installation slots are arranged along the height direction, there is a partition between two adjacent installation slots, and one leakage inductance core is installed in one installation slot.

[0021] It can be seen from the above that if the single air gap of the leakage inductance magnetic circuit is very large, the magnetic field at this location will still diffuse greatly to the surroundings and enter the coil, thereby causing high-frequency effect loss. In this case, multiple leakage inductance cores and mounting slots are arranged in conjunction with the arrangement of partitions to arrange adjacent leakage inductance cores with a fixed gap, that is, the leakage inductance cores are placed in sections so that the air gaps between each section of the leakage inductance cores are maintained at a preset fixed size, which can effectively prevent the leakage inductance magnetic field from scattering into the coil and causing additional high-frequency losses. This measure can further improve the efficiency of the converter.

[0022] A further solution is that the skeleton assembly includes two side skeletons, a leakage inductance core is arranged in the mounting groove of each side skeleton, the two side skeletons are connected to the main baffle, and the secondary winding is wound in the second wire grooves of the two side skeletons.

[0023] A further solution is that the main baffle is provided with extensions on both radially opposite sides of the central ring column, the extensions are connected to the ends of the side frames in the height direction, and the two side frames are respectively located on both radially opposite sides of the central ring column; the main magnetic core includes two side columns, the core column is located between the two side columns, and one side column is located on the outside of the second wire slot of the side frame on the same side.

[0024] As can be seen from the above, by arranging the two side frames and winding the secondary winding in the second wire slots of the two side frames, the magnetic integrated transformer of this case has a variety of magnetic circuit modes, and then becomes different types of power transformers according to actual applications to adapt to more different electrical equipment.

[0025] A further solution is that the main magnetic core is an EE type magnetic core, an EI type magnetic core, an EQ type magnetic core or an EQI type magnetic core.

[0026] It can be seen from the above that the adaptability of the transformer can be improved through different main core arrangements.

[0027] A further solution is that the primary winding and the secondary winding are both wound in one layer, the primary winding includes a primary curved portion and a primary straight portion, the secondary winding includes a secondary curved portion and a secondary straight portion, the primary curved portion is located between two protruding portions on the same side, the secondary curved portion is located in the second wire slot, and the secondary straight portion is located outside the primary straight portion and adjacent to the primary straight portion.

[0028] As can be seen from the above, by winding the primary winding and the secondary winding in a single layer, the primary winding and the secondary winding are closely adjacent to each other at the position of the straight part, and then most of the coils of the straight part can be exposed on the surface of the transformer, which is convenient for conducting heat to the water cooling plane, thereby improving the overall heat dissipation effect of the transformer.

[0029] In order to achieve the second object of the present invention, the present invention provides an electrical device, including the magnetic integrated transformer as described above.

[0030] In order to achieve the third object of the present invention, the present invention provides a vehicle, comprising a magnetic integrated transformer as described above. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a structural diagram of an embodiment of a magnetic integrated transformer of the present invention.

[0032] Figure 2 It is a structural diagram of the magnetic integrated transformer embodiment of the present invention from another perspective.

[0033] Figure 3 It is an exploded view of an embodiment of a magnetic integrated transformer of the present invention.

[0034] Figure 4 It is a structural diagram of the skeleton assembly in the embodiment of the magnetic integrated transformer of the present invention.

[0035] Figure 5 It is an exploded view of the skeleton assembly in the embodiment of the magnetic integrated transformer of the present invention.

[0036] Figure 6 It is a cross-sectional view of an embodiment of a magnetic integrated transformer of the present invention at a straight portion.

[0037] Figure 7 It is a cross-sectional view of the magnetic integrated transformer embodiment of the present invention at the leakage inductance core.

[0038] Figure 8 It is a magnetic circuit schematic diagram of an embodiment of a magnetic integrated transformer of the present invention.

[0039] Fig. 9 It is an application connection diagram of an embodiment of a magnetic integrated transformer of the present invention.

[0040] Fig.10 It is a structural schematic diagram of another embodiment of the magnetic integrated transformer of the present invention.

[0041] The present invention is further described below in conjunction with the accompanying drawings and embodiments. DETAILED DESCRIPTION

[0042] Reference Figures 1 to 8 The magnetic integrated transformer includes a main magnetic core 11, a plurality of leakage inductance magnetic cores 23, a skeleton component 2, a primary winding 12 and a secondary winding 13. The skeleton component 2 includes a main skeleton 21 and two side skeletons 22. The main skeleton 21 is provided with a central ring column 211 and two main baffles 214. The two main baffles 214 are respectively located at both ends of the height direction Z of the central ring column 211. The interior of the central ring column 211 is penetrated by a through hole 212 along the height direction Z. The outer surface of the central ring column 211 is provided with a through hole 212. A first wire groove 213 is formed around the primary winding 12, and the first wire groove 213 is arranged in a circular, racetrack-like or elliptical shape. In the present case, the first wire groove 213 is in a racetrack-like shape, that is, it has semicircular parts on both horizontal sides, and straight parts are arranged on both sides of the middle part. The primary winding 12 can be wound with a flat wire, and the primary winding 12 is wound in one layer. After the primary winding 12 is wound in the first wire groove 213, the primary winding 12 forms a primary curved part 121 located on both sides and a primary straight part 122 located on both sides.

[0043] The main baffles 214 located on the upper and lower sides of the height direction Z are respectively provided with protrusions 215, which extend from the radially opposite sides of the central ring column 211 along the horizontal sides. Each protrusion 215 is provided with a second clamping portion 217 in the middle, and the second clamping portion 217 is arranged in a clamping hole. The protrusion 215 is provided with second connecting holes 216 on both sides of the second clamping portion 217. The protrusion 215 is provided with positioning steps 218 on the outer edges of the opposite sides, and the inner end of the positioning step 218 has a stop block 219.

[0044] The side frame 22 extends along the height direction Z. The side frame 22 is provided with a side peripheral wall 221 and two side baffles 223. The side peripheral wall 221 extends in an arc shape. The side peripheral wall 221 extends along the height direction Z. The two side baffles 223 are respectively connected to the two ends of the side peripheral wall 221 in the height direction Z. A first clamping portion 225 is provided in the middle of the side baffle 223. The first clamping portion 225 is arranged in a clamping block. The protruding portion 215 is provided with first connecting holes 226 on both sides of the first clamping portion 225. The protruding portion 215 is provided with two L-shaped limit blocks on the outer end surface in the height direction Z. The two L-shaped limit blocks are located on the outer side of the first connecting hole 226. The two L-shaped limit blocks and the outer end surface of the side baffle 223 in the height direction Z constitute a clamping groove 224. The extension direction of the clamping groove 224 is in the same direction as the extension direction of the protruding portion 215.

[0045] A plurality of mounting grooves 227 are arranged inside the side peripheral wall 221, and the plurality of mounting grooves 227 are arranged along the height direction Z. A partition 229 is provided between two adjacent mounting grooves 227, and the partition 229 is arranged along the horizontal direction. A leakage inductance core 23 is installed in a mounting groove 227, and each mounting groove 227 is provided with an installation entrance facing the center ring column 211. The side peripheral wall 221 is provided with limit clamps 228 on both sides of the installation entrance, and the limit clamps 228 are used to limit the position of the leakage inductance core 23.

[0046] The end of the side frame 22 in the height direction Z is connected to the main baffle 214 at the corresponding end, that is, the side baffle 223 at one end is connected to the main baffle 214 at the corresponding end, the main baffle 214 is inserted into the slot 224, the extension 215 is adjacent to the outer end surface of the side baffle 223 in the height direction Z, the first clamping portion 225 is engaged with the second clamping portion 217, the first connecting hole 226 is opposite to the second connecting hole 216, the first connecting hole 226 is connected to the second connecting hole 216 by rivets, the positioning step 218 is gap-matched with the L-shaped limit block, the stop block 219 is adjacent to the L-shaped limit block, the two side frames 22 are respectively located on the radially opposite sides of the central ring column 211, and the side frame 2 is located between the two extensions 215, and then a plurality of leakage inductance cores 23 are arranged along the height direction Z, and are arranged at intervals of the thickness of the partition 229, and the plurality of leakage inductance cores 23 are located between the two extensions 215.

[0047] A second wire groove 222 is formed on the outer periphery of the side circumferential wall 221, and the edges of the two side baffles 223 protrude from the outer periphery of the side circumferential wall 221. The secondary winding 13 is wound in the second wire groove 222, and then the edges of the side baffles 223 can limit the secondary winding 13. Specifically, the secondary winding 13 is wound in the second wire groove 222 of the two side frames 22. At the same time, the secondary winding 13 is also wound around the leakage inductance core 23 and the outer periphery of the primary winding 12. The secondary winding 13 can be wound with a flat wire, and the secondary winding 13 is wound in one layer. The secondary winding 13 includes a secondary bent portion 131 and a secondary straight portion 132. The primary bent portion 121 is located between the two protruding portions 215 on the same side, and the secondary bent portion 131 is located in the second wire groove 222. The secondary straight portion 132 is located on the outside of the primary straight portion 122 and is adjacent to the primary straight portion 122. The end surfaces of the main magnetic core 11 and the secondary straight portion 132 on the same side are also arranged straight, that is, the side surface of the main magnetic core 11 and the outer surface of the secondary straight portion 132 are arranged coplanarly, which is conducive to fitting the heat dissipation device.

[0048] The main magnetic core 11 can adopt an EE type magnetic core, an EI type magnetic core, an EQ type magnetic core or an EQI type magnetic core. In the present embodiment, the main magnetic core 11 adopts an EE type magnetic core. The main magnetic core 11 includes two E type magnetic cores 111. Each E type magnetic core 111 includes a cross beam 112, two side columns 113 and a core column 114. The core column 114 is located between the two side columns 113. After the two E type magnetic cores 111 are docked, the side columns 113 and the core column 114 are respectively connected between the two cross beams 112. The core column 114 passes through the through hole 212. A side column 113 is located on the outside of the second wire slot 222 of the side frame 22 on the same side. Multiple leakage inductance cores 23 are located between the two cross beams 112.

[0049] Reference Figure 8 and Fig. 9 , the connection application of the magnetic integrated transformer in this case is as follows Fig. 9 As shown, the primary winding 12 is connected to the input end, and the secondary winding 13 is connected to the output end. When the primary winding 1 is energized, the main magnetic flux generated by the primary winding 1 returns to the core column 114 through the two side beams 112 and the two side columns 113. The leakage inductance magnetic field passes through the high permeability leakage inductance magnetic core 23 instead of air. The secondary leakage inductance magnetic flux is as shown in FIG. Figure 8 As shown, through multiple leakage inductance magnetic cores 23, multiple leakage inductance magnetic cores 23 are placed in sections, so that the air gaps between each section of the leakage inductance magnetic core are kept at a small size, which can effectively prevent the leakage inductance magnetic field from scattering into the coil package to cause additional high-frequency loss. In this way, the volume occupied by the leakage inductance magnetic circuit will be greatly reduced, thereby reducing the overall volume of the device. By controlling the size of the air gap between the magnetic cores, the size of the required leakage inductance can be very accurately controlled; the leakage inductance magnetic field is mainly concentrated in this one or several magnetic cores, and will not be scattered in the coil package of the primary and secondary sides, reducing the loss of high-frequency effects and further improving the efficiency of the converter.

[0050] Electrical equipment examples: The electrical device includes the magnetic integrated transformer of the above embodiment. The electrical device may include but is not limited to a motor controller, an on-board charger, an on-board power supply, an inverter or a transformer.

[0051] Transport Example: The means of transportation includes electrical equipment as described above, and the means of transportation may be new energy electric cars, new energy electric buses, new energy electric trucks, new energy electric cleaning vehicles, new energy electric rail transportation vehicles, new energy electric flying vehicles, new energy electric shipping vehicles, etc.

[0052] Of course, the above embodiment is only a preferred embodiment of the present invention, and there may be more variations in specific applications. For example, the magnetic integrated transformer may also adopt a single-side frame arrangement. Fig.10 As shown, the single-sided skeleton component is connected to the main baffle, the primary winding 12 is wound in the first wire slot of the main skeleton, a plurality of leakage inductance cores 23 are arranged in the skeleton component, the secondary winding 13 is wound in the second wire slot of the side skeleton, the secondary winding 13 is wound around the leakage inductance core 23 and the periphery of the primary winding 12, and the main core can be arranged in UI type, double U type or O type, which can also achieve the purpose of this case.

[0053] In addition, there are various designs and connection methods for the side frames. The side frames can be connected to the main frame without side baffles, and two or more side frames can be arranged. In addition to being located on opposite sides, the side frames can also be arranged on the same side, or in an L-shaped arrangement. It can be adjusted according to the use scenario of the transformer. Of course, the arrangement of a single leakage inductance core can also achieve the purpose of this case.

[0054] As can be seen from the above, in this case, the primary winding is first wound around the main frame, and the leakage inductance core is pre-installed into the mounting groove of the side frame. As the side frame is connected to the main baffle of the main frame, the leakage inductance core is accurately installed and positioned. Then the secondary winding is wound in the second wire slot and around the leakage inductance core and the periphery of the primary winding. Finally, the main core is assembled to complete the process. This case is not only convenient for the winding of the winding and the assembly of the core, but also conducive to automated production and assembly. The assembly of the leakage inductance core is simple and the position is precise and stable. Moreover, the leakage inductance magnetic field passes through the leakage inductance core with high magnetic permeability instead of air. The volume occupied by the leakage inductance magnetic circuit will be greatly reduced, thereby reducing the overall volume of the device. By controlling the size of the air gap between the magnetic cores, the size of the required leakage inductance can be very accurately controlled. The leakage inductance magnetic field is mainly concentrated in one or several magnetic cores and will not be scattered in the wire packages of the primary and secondary sides, thereby reducing the loss of high-frequency effects and improving the efficiency of the converter.

Claims

1. A magnetic integrated transformer, including a main magnetic core, a leakage inductance magnetic core, a skeleton assembly, a primary winding and a secondary winding; Features: The skeleton assembly includes a main skeleton and a side skeleton, the main skeleton is provided with a central ring column and two main baffles, the two main baffles are respectively located at both ends of the central ring column in the height direction, the interior of the central ring column is penetrated by a through hole along the height direction, the outer periphery of the central ring column is formed with a first wire groove, and the primary winding is wound in the first wire groove; The side frame extends along the height direction, a mounting groove is provided inside the side frame, an end of the side frame located in the height direction is connected to the main baffle at the corresponding end, the leakage inductance core is located in the mounting groove and between the two main baffles, a second wire groove is formed on the periphery of the side frame, the secondary winding is wound in the second wire groove, and the secondary winding is wound on the periphery of the leakage inductance core and the primary winding; The main magnetic core comprises two cross beams, side columns and a core column, wherein the side columns and the core column are respectively connected between the two cross beams, the core column passes through the through hole, and the side columns are located outside the second wire slot.

2. The magnetic integrated transformer according to claim 1, characterized in that: The side frame is provided with a side peripheral wall and two side baffles, the side peripheral wall extends along the height direction, the two side baffles are respectively connected to the two ends of the side peripheral wall in the height direction, the mounting groove is provided inside the side peripheral wall, and the side baffle at one end is connected to the main baffle at the corresponding end.

3. The magnetic integrated transformer according to claim 2, characterized in that: The side baffle is provided with a slot, and the main baffle is inserted into the slot.

4. The magnetic integrated transformer according to claim 3, characterized in that: The side baffle is provided with a first clamping portion, and the main baffle is provided with a second clamping portion, and the first clamping portion is engaged with the second clamping portion.

5. The magnetic integrated transformer according to claim 3, characterized in that: The side baffle is provided with a first connecting hole, and the main baffle is provided with a second connecting hole, and the first connecting hole is connected to the second connecting hole by a rivet.

6. The magnetic integrated transformer according to claim 1, characterized in that: The installation groove is provided with an installation opening facing the central ring column, and the side frame is provided with limiting clamping parts on both sides of the installation opening.

7. The magnetic integrated transformer according to claim 1, characterized in that: The magnetic integrated transformer comprises a plurality of leakage inductance cores, the side frame is provided with a plurality of mounting slots, the plurality of mounting slots are arranged along the height direction, a partition is provided between two adjacent mounting slots, and one leakage inductance core is installed in one mounting slot.

8. The magnetic integrated transformer according to any one of claims 1 to 7, characterized in that: The skeleton assembly includes two side skeletons, the leakage inductance core is arranged in the installation groove of each side skeleton, the two side skeletons are connected to the main baffle, and the secondary winding is wound in the second wire groove of the two side skeletons.

9. The magnetic integrated transformer according to claim 8, characterized in that: The main baffle is provided with extensions on two radially opposite sides of the central ring column, respectively, and the extensions are connected to the ends of the side frames in the height direction, and the two side frames are respectively located on two radially opposite sides of the central ring column; The main magnetic core includes two side columns, the core column is located between the two side columns, and one side column is located outside the second wire slot of the side frame on the same side.

10. The magnetic integrated transformer according to claim 9, characterized in that: The main magnetic core is an EE type magnetic core, an EI type magnetic core, an EQ type magnetic core or an EQI type magnetic core.

11. The magnetic integrated transformer according to claim 9, characterized in that: The primary winding and the secondary winding are both wound in one layer, the primary winding includes a primary curved portion and a primary straight portion, the secondary winding includes a secondary curved portion and a secondary straight portion, the primary curved portion is located between two protruding portions on the same side, the secondary curved portion is located in the second wire slot, and the secondary straight portion is located outside the primary straight portion and adjacent to the primary straight portion.

12. An electrical device, characterized in that It comprises the magnetic integrated transformer as claimed in any one of claims 1 to 11.

13. A means of transport, characterized in that It comprises the magnetic integrated transformer as claimed in any one of claims 1 to 11.

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