Transformer

Abstract

The utility model discloses a transformer which comprises at least two oppositely-arranged frameworks, each framework comprises a transverse rod and a plurality of baffles, the baffles are arranged on the transverse rods in a sleeving mode and are perpendicular to the transverse rods, and the transverse rods are divided into a plurality of winding grooves through the baffles; a coil winding is wound in each winding groove; at least two magnetic cores are arranged in the framework, the at least two frameworks are connected through the at least two magnetic cores, gaps are formed between the magnetic cores and correspond to at least part of the baffles in the first direction, and an annular magnetic core with the gaps is formed; the first direction is the vertical direction of the arrangement direction of the coil windings. By means of the mode, power transmission can be effectively controlled, the influence of leakage flux on a transformer winding is reduced, high-voltage current can be resisted, working stability and reliability are guaranteed, energy loss is reduced, the integration level and compactness of the transformer are improved, and production requirements are met.

Description

Technical Field

[0001] The present application relates to the technical field of transformers, and in particular to a transformer. Background Art

[0002] In order to meet the needs of modern power electronics, high-frequency high-voltage transformers, with their excellent working efficiency, miniaturized design concept, and stable performance, have shown outstanding performance in variable-frequency high-voltage power supply applications. They have successfully replaced traditional industrial frequency transformers in many application scenarios and have been widely used, providing a more efficient and compact solution for power conversion.

[0003] In applications such as switching power supply topology, it is necessary to add a resonant inductor to the transformer to control power transmission, and conventional transformer design cannot ensure that the transformer can work stably in circuits above 10,000 volts. Summary of the invention

[0004] The main technical problem solved by the present application is to provide a transformer that meets high efficiency and stability during transformer operation, effectively controls power transmission by setting the position of the core gap, reduces the influence of leakage flux on the transformer winding, can withstand high voltage current, ensures working stability and reliability, reduces energy loss, improves transformer integration and compactness, and meets production needs.

[0005] In order to solve the technical problem that the transformer cannot work efficiently and stably, the technical solution adopted in the present application provides a transformer, wherein the transformer includes:

[0006] At least two frames arranged opposite to each other, each frame comprising a crossbar and a plurality of baffles sleeved on the crossbar and arranged perpendicular to the crossbar, the baffles dividing the crossbar into a plurality of winding grooves; a coil winding is wound around each winding groove;

[0007] At least two magnetic cores are arranged inside the skeleton, and at least two skeletons are connected by at least two magnetic cores. At least part of the baffle between the magnetic cores has a gap along the first direction to form a ring-shaped magnetic core with a gap; the first direction is the vertical direction of the arrangement direction of the coil winding.

[0008] The magnetic core is symmetrically arranged on both sides of the central axis along the first direction.

[0009] The transformer includes: at least part of the baffle has a gap formed in the middle along the first direction for spacing the coil windings, and the gap is arranged corresponding to the gap between the magnetic cores.

[0010] The width of the gap ranges from 1 mm to 10 mm.

[0011] The widths of all the gaps in the magnetic core are the same.

[0012] Among them, at least two magnetic cores are open annular magnetic cores with an opening formed by two parallel arms at one end, which are used to connect the skeleton.

[0013] The magnetic core includes two open annular magnetic cores formed by two parallel arms with openings and two cylindrical magnetic cores, forming an annular magnetic core with four gaps.

[0014] The baffles and coil windings of each frame are arranged in the same manner.

[0015] The baffle of the frame and the coil winding are symmetrical on both sides of the central axis along the first direction.

[0016] The coil winding includes a first winding and a second winding, the first winding is arranged at two ends of the frame, and the second winding is arranged in the middle of the frame; the first winding is used to connect to a power source, and the second winding is used to connect to a load.

[0017] Different from the prior art, the transformer provided in the present application improves the insulation strength by slot winding of the primary and secondary windings, sets the position of the core gap, effectively controls the transmission of power, reduces the influence of leakage flux on the transformer winding, can withstand high voltage current, ensures working stability and reliability, reduces energy loss, improves the integration and compactness of the transformer, and meets production needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the structure of an implementation method of a transformer of the present application;

[0019] Figure 2 This is a bottom view of the structure of an embodiment of the transformer of the present application;

[0020] Figure 3 It is a schematic diagram of the structure of the magnetic core of a practical form of the transformer of the present application;

[0021] Figure 4 is a structural cross-sectional view of another embodiment of the transformer of the present application;

[0022] Figure 5 It is a schematic diagram of the skeleton and coil winding structure of another embodiment of the transformer of the present application;

[0023] Figure 6 It is a schematic diagram of the structure of the magnetic core of another practical form of the transformer of the present application. DETAILED DESCRIPTION

[0024] The present application is described in detail below with reference to the accompanying drawings and implementation methods.

[0025] The present application first provides a transformer, which realizes power transmission control by setting it at the corresponding position of the transformer core, can eliminate the impact of adding resonant inductance on the device volume, reduce system losses, improve transmission efficiency, and avoid magnetic saturation under high voltage current, thereby ensuring the stability and safety of the electromagnetic system.

[0026] See also Figure 1 , Figure 2 and Figure 3 , Figure 1 This is a schematic diagram of the structure of an implementation method of a transformer of the present application; Figure 2 This is a bottom view of the structure of an embodiment of the transformer of the present application; Figure 3 It is a schematic diagram of the structure of a magnetic core of a practical transformer of the present application.

[0027] The transformer 100 includes:

[0028] At least two skeletons 101 are arranged opposite to each other, each skeleton 101 comprises a cross bar (not shown) and a plurality of baffles 102 which are sleeved on the cross bar and arranged perpendicular to the cross bar, and the baffles 102 divide the cross bar into a plurality of winding grooves (not shown); a coil winding 103 is wound around each winding groove.

[0029] Specifically, the winding groove formed by the baffle 102 provided on the frame 101 can increase the physical distance between the windings 103, ensure the insulation requirements, reduce the capacitance effect between the coil windings 103, and thus improve the voltage resistance.

[0030] To satisfy the symmetry of the magnetic flux, the arrangement of the coil winding 103 in the winding 103 slot can be that the primary winding is arranged in the middle of the skeleton 101 and the secondary winding is arranged at both ends of the skeleton 101; or the secondary winding is arranged in the middle of the skeleton 101 and the primary winding is arranged at both ends of the skeleton 101, so as to meet the insulation requirements between the windings 103, especially the insulation safety distance between the primary winding and the secondary winding.

[0031] In a specific embodiment, the thickness of the baffle 102 between the primary winding and the secondary winding is greater than the thickness of the baffle 102 between the same windings 103, thereby increasing the physical distance between the primary winding and the secondary winding. The baffle 102 between the primary winding and the secondary winding may be a whole thick baffle, or may be a baffle 102 formed by two baffles with a gap in the middle (not shown), and the gap may be filled with insulating materials such as air, resin or ceramic substrate to further meet the insulation requirements.

[0032] At least two magnetic cores 104 are arranged inside the skeleton 101, and at least two skeletons 101 are connected by at least two magnetic cores 104. A gap 105 is formed along a first direction corresponding to at least part of the baffle 102 between each magnetic core 104, forming a ring-shaped magnetic core 104 with a gap 105; the first direction is a direction perpendicular to the arrangement direction of the coil winding 103.

[0033] Since the distance between the windings 103 is far, the leakage inductance will increase, the equivalent resonant inductance of the circuit will increase, and the resonant frequency of the circuit will decrease, so that the resonant current of the circuit will increase, the loss will increase, and the working efficiency of the transformer 100 will be affected; and the gap 105 of the magnetic core 104 will cause leakage flux, and the leakage flux will be scattered in the space, which will cause additional eddy current heat loss to the current in the winding 103, and may increase electromagnetic interference to the surrounding electronic equipment. Therefore, the position of the gap 105 of the magnetic core 104 is set at the baffle 102 used to achieve insulation between the windings 103, which can control the concentration of the leakage flux in certain areas, thereby optimizing the magnetic flux distribution, reducing the eddy current heat loss of the leakage flux of the magnetic core 104 on the winding 103, and avoiding the influence of the air gap leakage flux of the magnetic core 104 on the winding 103 to the greatest extent.

[0034] An annular magnetic core 104 with an opening is provided, and the skeleton 101 is connected through the two arms of the opening of the magnetic core 104 to form a magnetic flux loop, and a gap 105 is formed in the first direction. The gap 105 can correspond to the baffle 102 set between the same-level windings 103, or can be set between the baffles 102 of different levels of windings 103, and can be set at the middle baffle 102 or the baffles 102 at both ends. In order to balance the influence of the magnetic flux on the winding 103, the setting of the gap 105 can be centrally symmetrical or axially symmetrical.

[0035] The number of magnetic cores 104 can be two, three, four, five, six, etc., and the selection of even-numbered pairs of magnetic cores 104 can make it easier to design the positions of the gaps 105 of the magnetic cores 104. Under the same requirements for the width of the gaps 105, although the magnetic cores 104 are divided into more sections, the influence of the leakage flux is reduced and the difficulty of setting the positions of the gaps 105 of the magnetic cores 104 is reduced, the production and assembly costs of the magnetic cores 104 are increased, so determining the appropriate number of magnetic cores 104 and the positions of the gaps of the magnetic cores 104 is helpful to reduce the production costs.

[0036] The magnetic core 104 is formed with a gap 105 along the first direction, so that the magnetic flux can mostly and evenly pass through the magnetic core 104, which can reduce the path of leakage magnetic flux passing through the coil winding 103, thereby reducing the impact of eddy current effect on the coil winding 103 and reducing energy loss.

[0037] In an optional embodiment, the transformer 100 includes two magnetic cores 104 , and the gap 105 formed by the magnetic cores 104 corresponds to the position of the baffle 102 disposed at the center of the axis along the first direction.

[0038] In other embodiments, the transformer 100 includes two magnetic cores 104 , and the gap 105 formed by the magnetic cores 104 may be a centrally symmetrical gap 105 corresponding to the position of the baffle 102 at the outermost end of the frame 101 .

[0039] In an optional implementation, the magnetic core 104 is symmetrically arranged on both sides of the central axis along the first direction.

[0040] The symmetrically arranged magnetic core 104 forms a corresponding symmetrically arranged gap 105, which can ensure symmetrical distribution of magnetic flux, balance the influence of leakage magnetic flux on the winding 103, reduce the eddy current heat loss of the winding, and improve the electromagnetic conversion efficiency.

[0041] In an optional embodiment, at least two magnetic cores 104 are open annular magnetic cores 104 with an opening formed by two parallel arms at one end, and are used to connect to the skeleton 101 .

[0042] The shape of the magnetic core 104 also affects the leakage inductance of the transformer 100. At least two magnetic cores 104 are U-shaped magnetic cores or open rectangular magnetic cores formed with three sides. At least two magnetic cores 104 have the same size. When the two arms of the magnetic core 104 are the same length, an axisymmetric gap 105 of the magnetic core 104 is formed. In other embodiments, the two arms of the magnetic core 104 may be different to form a centrally symmetrical gap 105 of the magnetic core 104.

[0043] In an optional embodiment, the baffles 102 and the coil windings 103 of each skeleton 101 are arranged in the same manner. The same arrangement helps to evenly distribute the magnetic flux in the magnetic core 104, reduce local overheating and loss caused by magnetic flux concentration, improve the efficiency of magnetic energy conversion, help optimize the symmetry of the electromagnetic field, reduce electromagnetic interference and noise, and form a unified arrangement so that the windings 103 are easy to produce and maintain.

[0044] See also Figure 4 , Figure 5 , Figure 6 ， Figure 4 is a structural cross-sectional view of another embodiment of the transformer of the present application; Figure 5 It is a schematic diagram of the skeleton and coil winding structure of another embodiment of the transformer of the present application; Figure 6 It is a schematic diagram of the structure of the magnetic core of another practical form of the transformer of the present application.

[0045] The transformer 100 includes:

[0046] At least two skeletons 101 are arranged opposite to each other, each skeleton 101 comprises a cross bar (not shown) and a plurality of baffles 102 which are sleeved on the cross bar and arranged perpendicular to the cross bar, and the baffles 102 divide the cross bar into a plurality of winding grooves (not shown); a coil winding 103 is wound around each winding groove.

[0047] Specifically, the winding groove formed by the baffle 102 provided on the frame 101 can increase the physical distance between the windings 103, ensure the insulation requirements, reduce the capacitance effect between the windings 103, and thus improve the voltage resistance.

[0048] The arrangement of the coil winding 103 in the winding 103 slot needs to satisfy the symmetry of the magnetic flux and the insulation requirements between the windings 103, especially the insulation safety distance between the primary winding and the secondary winding.

[0049] In a specific embodiment, the thickness of the baffle 102 between the primary winding and the secondary winding is greater than the thickness of the baffle 102 between the same windings 103, thereby increasing the physical distance between the primary winding and the secondary winding.

[0050] At least two magnetic cores 104 are arranged inside the skeleton 101, and at least two skeletons 101 are connected by at least two magnetic cores 104. A gap 105 is formed along a first direction corresponding to at least part of the baffle 102 between each magnetic core 104, forming a ring-shaped magnetic core 104 with a gap 105; the first direction is a direction perpendicular to the arrangement direction of the coil winding 103.

[0051] Since the distance between the windings 103 is far, the leakage inductance will increase, the equivalent resonant inductance of the circuit will increase, and the resonant frequency of the circuit will decrease, so that the resonant current of the circuit will increase, the loss will increase, and the working efficiency of the transformer 100 will be affected; and the gap 105 of the magnetic core 104 will cause leakage flux, and the leakage flux will be scattered in space, which will cause additional eddy current heat loss to the current in the winding 103, and may increase electromagnetic interference to the surrounding electronic equipment. Therefore, the position of the gap 105 of the magnetic core 104 is set at the baffle 102 used to achieve insulation between the windings 103, which can control the concentration of magnetic flux in certain areas, thereby optimizing the distribution of leakage flux, reducing the eddy current heat loss of the leakage flux of the magnetic core 104 on the winding 103, and avoiding the influence of the air gap leakage flux of the magnetic core 104 on the winding 103 to the greatest extent.

[0052] An annular magnetic core 104 with an opening is provided, and the skeleton 101 is connected through the two arms of the opening of the magnetic core 104 to form a magnetic flux loop, and a gap 105 is formed in the first direction. The gap 105 can correspond to the baffle 102 set between the same-level windings 103, or can be set between the baffles 102 of different levels of windings 103, and can be set at the middle baffle 102 or the baffles 102 at both ends. In order to balance the influence of the magnetic flux on the winding 103, the setting of the gap 105 can be centrally symmetrical or axially symmetrical.

[0053] The number of magnetic cores 104 can be two, three, four, five, six, etc., and the selection of an even number of magnetic cores 104 in pairs can make it easier to design the positions of the gaps 105 of the magnetic cores 104. Under the same gap 105 width requirement, the magnetic core 104 is divided into more sections, which can reduce the influence of leakage flux and reduce the difficulty of setting the position of the gap 105 of the magnetic core 104, but it will increase the production and assembly cost of the magnetic core 104, so determining the appropriate number of magnetic cores 104 and the position of the gap 105 of the magnetic core 104 helps to reduce production costs.

[0054] The magnetic core 104 is formed with a gap 105 along the first direction, so that the magnetic flux can mostly and evenly pass through the magnetic core 104, which can reduce the path of leakage magnetic flux passing through the coil winding 103, thereby reducing the impact of eddy current effect on the coil winding 103 and reducing energy loss.

[0055] In an optional implementation, the magnetic core 104 is symmetrically arranged on both sides of the central axis along the first direction.

[0056] The symmetrically arranged magnetic cores 104 form symmetrically arranged gaps 105 , which can ensure uniform distribution of magnetic flux, reduce magnetic leakage, reduce hysteresis loss, and improve electromagnetic conversion efficiency.

[0057] In an optional embodiment, the transformer 100 includes: at least a portion of the baffle 102 has a gap (not shown) formed in the middle along the first direction for spacing the coil windings 103 , and the gap is arranged corresponding to the gap 105 between each magnetic core 104 .

[0058] The baffle 102 may be formed by two baffles 102 with a gap in the middle, and the gap may be filled with insulating materials such as air, resin or ceramic substrate to further meet the insulation requirements.

[0059] In other implementations, the baffle 102 between the primary winding and the secondary winding may be a whole thick baffle 102 , and the thickness of the baffle 102 may be consistent with the width of the gap 105 of the magnetic core 104 .

[0060] In an optional implementation, the transformer 100 includes: a gasket is arranged in the frame 101, the gasket fills the gap 105 and is used to fix the magnetic core 104; the gasket includes insulating materials such as ceramic sheets or Mylar sheets.

[0061] After the magnetic core 104 is divided into multiple sections, the magnetic core 104 set in the skeleton 101 needs to be fixed by gaskets to prevent the change of the gap 105 from affecting the magnetic flux. The width of the gap 105 can be fixed by one gasket or by multiple thin gaskets, such as one or more combinations of gaskets of 1 mm, 2 mm, 2.5 mm, 3 mm, 5 mm, etc.

[0062] In an optional embodiment, the width of the gap 105 ranges from 1 mm to 10 mm.

[0063] The width of the gap 105 can be 1 mm, 1.5 mm, 2 mm, 2.5 mm, 3 mm, 5 mm, 8 mm, 10 mm, etc.

[0064] The width of the gap 105 needs to be determined according to the specific structure of the winding 103 and the magnetic core 104 . Designing the width of the air gap can optimize the magnetic flux path, reduce magnetic leakage, improve the efficiency and stability of the transformer 100 , and avoid performance degradation due to saturation of the magnetic core 104 .

[0065] In an optional implementation, the widths of all the gaps 105 of the magnetic core 104 are the same.

[0066] The uniform width of the gap 105 in the magnetic core 104 can optimize the magnetic field distribution in the magnetic core 104 and reduce the intensity of the local leakage flux, thereby reducing the impact of the leakage flux on the winding 103, reducing heat loss, and improving the efficiency of the transformer; reducing electromagnetic interference and optimizing the electromagnetic compatibility of the transformer 100.

[0067] In an optional embodiment, at least two magnetic cores 104 are open annular magnetic cores 104 with an opening formed by two parallel arms at one end, and are used to connect to the skeleton 101 .

[0068] The shape of the magnetic core 104 also affects the leakage inductance of the transformer 100. At least two magnetic cores 104 are U-shaped magnetic cores or open rectangular magnetic cores formed with three sides. At least two magnetic cores 104 have the same size. When the two arms of the magnetic core 104 are the same length, an axisymmetric gap 105 of the magnetic core 104 is formed. In other embodiments, the two arms of the magnetic core 104 may be different to form a centrally symmetrical gap 105 of the magnetic core 104.

[0069] In an optional embodiment, the magnetic core 104 includes two open annular magnetic cores formed by two parallel arms with openings and two cylindrical magnetic cores, forming an annular magnetic core 104 with four gaps 105 .

[0070] like Figure 5 The transformer 100 shown includes two frames 101, one frame 101 is configured as four winding slots by five baffles 102, and the overall design is divided into eight winding slots. The primary winding is arranged in the winding slots at both ends of the frame 101, and the secondary winding is arranged in the two winding slots in the middle of the frame 101.

[0071] The two magnetic cores 104 at the center of the skeleton 101 are fixed by gaskets (not shown), forming four 4 mm gaps 105 of the magnetic cores 104, which are correspondingly arranged at the positions of the baffles 102 of the primary winding and the secondary winding, so as to solve the inductance imbalance during multi-slot winding and avoid the eddy current thermal effect of the coil winding 103 caused by the leakage of magnetic flux in the gaps 105, resulting in energy loss or circuit instability due to inductance imbalance.

[0072] In other embodiments, the width range of the gap 105 of the magnetic core 104 can be adjusted according to actual needs, and the gap 105 is correspondingly disposed at a position where the baffle 102 or the coil winding 103 is less affected.

[0073] In an optional embodiment, the baffles 102 and the coil windings 103 of each skeleton 101 are arranged in the same manner.

[0074] The same setting method helps to evenly distribute the magnetic flux in the magnetic core 104, reduce local overheating and loss caused by magnetic flux concentration, improve magnetic energy conversion efficiency, help optimize the symmetry of the electromagnetic field, reduce electromagnetic interference and noise, and form a unified setting method to facilitate production and maintenance of the winding 103.

[0075] In an optional embodiment, the baffle 102 of the skeleton 101 and the coil winding 103 are symmetrical on both sides of the central axis along the first direction.

[0076] The baffle 102 and the coil winding 103 of the skeleton 101 symmetrically arranged corresponding to the magnetic core 104 can reduce the imbalance of magnetic flux and leakage magnetic flux of the magnetic core 104, which may lead to circuit stability problems such as unbalanced winding current caused by unbalanced inductance of the winding 103; the baffle 102 and the gap 105 of the magnetic core 104 are symmetrically arranged, which can minimize the winding energy loss caused by the influence of the gap 105 of the magnetic core 104.

[0077] In an optional embodiment, the coil winding 103 includes a first winding and a second winding, the first winding is arranged at both ends of the skeleton 101, and the second winding is arranged in the middle of the skeleton 101; wherein the first winding is used to connect to a power source, and the second winding is used to connect to a load.

[0078] Specifically, the primary winding may be arranged in the middle of the frame 101 , and the secondary winding may be arranged at both ends of the frame 101 . In other implementations, the secondary winding may be arranged in the middle of the frame 101 , and the primary winding may be arranged at both ends of the frame 101 .

[0079] A winding needle (not shown) may also be provided on the baffle 102 separating the primary winding and the secondary winding, and a circuit board (not shown) may be provided correspondingly, and the circuit board may be supported by the baffle 102 .

[0080] Through the above-mentioned method, the primary winding and the secondary winding are slot-wound to improve the insulation strength, set the position of the gap 105 of the magnetic core 104, effectively control the power transmission, reduce the influence of leakage flux on the winding 103 of the transformer 100, can withstand high voltage and high current, ensure the stability and reliability of the circuit operation, reduce energy loss, improve the integration and compactness of the transformer 100, simplify the production process, and reduce the production cost.

[0081] In the several implementation modes provided in the present application, it should be understood that the disclosed systems and devices can be implemented in other ways. For the technical solutions in the embodiments of the present application, it is obvious that the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present application. For example, the device implementation mode described above is only schematic. For example, the division of the modules or units is only a logical function division. There may be other division modes in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed.

[0082] It should be noted that if the embodiments of the present application involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0083] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

[0084] In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0085] The above description is only an implementation method of the present application, and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly used in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A transformer, characterized in that: The transformer comprises: At least two skeletons are arranged opposite to each other, each skeleton comprises a crossbar and a plurality of baffles sleeved on the crossbar and arranged perpendicular to the crossbar, the baffles divide the crossbar into a plurality of winding grooves; a coil winding is wound around each winding groove; At least two magnetic cores are arranged inside the skeleton, and at least two skeletons are connected by the at least two magnetic cores. At least part of the baffles corresponding to each of the magnetic cores are formed with gaps along the first direction to form a ring-shaped magnetic core with gaps; the first direction is a direction perpendicular to the arrangement direction of the coil windings.

2. The transformer according to claim 1, characterized in that: The transformer comprises: the magnetic core is symmetrically arranged on both sides of the central axis along the first direction.

3. The transformer according to claim 1, characterized in that: The transformer comprises: at least a portion of the middle portion of the baffle is formed with a gap along the first direction for spacing the coil windings, and the gap is arranged corresponding to the gap between the magnetic cores.

4. The transformer according to claim 1, characterized in that: The width of the gap ranges from 1 mm to 10 mm.

5. The transformer according to claim 1 or 2, characterized in that: All the gaps in the magnetic core have the same width.

6. The transformer according to claim 1, characterized in that: At least two of the magnetic cores are open annular magnetic cores with an opening formed by two parallel arms at one end, and are used to connect the skeleton.

7. The transformer according to claim 5, characterized in that: The magnetic core comprises two open annular magnetic cores formed by two parallel arms with openings and two cylindrical magnetic cores, forming an annular magnetic core with four gaps.

8. The transformer according to claim 1, characterized in that: The baffles and coil windings of each frame are arranged in the same manner.

9. The transformer according to claim 1, characterized in that: The baffles of the frame and the coil windings are symmetrical on both sides of the central axis along the first direction.

10. The transformer according to claim 1, characterized in that: The coil winding includes a first winding and a second winding, wherein the first winding is arranged at two ends of the frame, and the second winding is arranged in the middle of the frame; wherein the first winding is used to connect to a power source, and the second winding is used to connect to a load.

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