Inductive structures, reactance devices and transformer devices

Abstract

The present disclosure relates to the technical field of transformer equipment, and specifically provides an inductor structure, a reactance device, and a transformer device. The inductor structure includes: a first magnetic core having a first end and a second end opposite to each other; and a winding including a first conductor and a second conductor, wherein one end of the first conductor is connected to the first end of the first magnetic core, one end of the second conductor is connected to the second end of the first magnetic core, and the first conductor and / or the second conductor are wound around the outer surface of the first magnetic core; the other ends of the first conductor and the second conductor form the connection terminals of the inductor structure. The disclosed inductor structure effectively suppresses eddy currents in the magnetic core and reduces heating of the magnetic core.

Description

Technical Field

[0001] The present disclosure relates to the technical field of AC transformer equipment, and in particular to an inductor structure, a reactance device, and a transformer device. Background Art

[0002] An inductor is a component that converts electrical energy into magnetic energy for storage. It consists of a coil and an iron core. Inductors are widely used in the generation, transmission, transformation, distribution, and utilization of alternating current (AC). Inductors come in many forms, including transformers for voltage conversion, reactors for reactive power regulation, and chokes for circuit stabilization. These are all essentially inductors.

[0003] In related technologies, eddy currents in the iron core caused by the principle of electromagnetic induction have always been a difficult problem in the field of AC inductors. Eddy currents can cause the iron core to heat up and bring about eddy current losses. Therefore, how to suppress eddy currents in the iron core is an important research direction. Summary of the Invention

[0004] In order to solve the technical problem of eddy current in the inductor core, the embodiments of the present disclosure provide an inductor structure, a reactance device and a transformer device.

[0005] In a first aspect, an embodiment of the present disclosure provides an inductor structure, comprising:

[0006] a first magnetic core having opposing first and second ends; and

[0007] The winding includes a first conductor and a second conductor, one end of the first conductor is connected to the first end of the first magnetic core, one end of the second conductor is connected to the second end of the first magnetic core, and the first conductor and / or the second conductor are wound on the outer surface of the first magnetic core; the other ends of the first conductor and the second conductor form the connection terminals of the inductor structure.

[0008] In some embodiments, the first magnetic core is a cylindrical structure with a ring-shaped cross section, and a first opening is provided on the first magnetic core, and the first opening passes through the first magnetic core; the first opening forms two opposite side walls on the first magnetic core, forming the first end and the second end respectively.

[0009] In some embodiments, the first magnetic core includes a plurality of magnetic core laminations, and the plurality of magnetic core laminations are sequentially connected in series or in parallel through conductive wires.

[0010] In some embodiments, an insulating layer is provided between adjacent magnetic core laminations.

[0011] In some embodiments, the first magnetic core is a multi-layer winding structure, and inner and outer ends of the winding structure form the first end and the second end respectively.

[0012] In some embodiments, the inductor structure further includes:

[0013] A third conductive wire is wound on the outer surface of the first magnetic core and is connected in parallel with the first conductive wire and the second conductive wire. The third conductive wire has a larger diameter than the first conductive wire and the second conductive wire.

[0014] In a second aspect, an embodiment of the present disclosure provides an inductive device, comprising the inductive structure according to any embodiment of the first aspect.

[0015] In some embodiments, the reactance device comprises:

[0016] a first coil assembly and a second coil assembly, wherein the first coil assembly and the second coil assembly are the inductor structure; the connection terminals of the first coil assembly and the second coil assembly are connected in series or in parallel, and the winding directions of the first coil assembly and the second coil assembly are opposite; and

[0017] The second magnetic core is provided at both axial ends of the first coil assembly and the second coil assembly and is used to magnetically connect the first coil assembly and the second coil assembly to form a magnetic flux loop.

[0018] In some embodiments, the reactance device comprises:

[0019] There are multiple groups of inductance structures, and the first magnetic cores of the multiple groups of inductance structures are sequentially connected along the axial direction to form an annular closed structure to form a magnetic flux loop; and the windings of the multiple groups of inductance structures are sequentially connected in series or in parallel.

[0020] In a third aspect, the present disclosure provides a voltage transformation device, comprising:

[0021] A primary coil assembly and a secondary coil assembly, at least one of the primary coil assembly and the secondary coil assembly comprises the inductor structure according to any embodiment of the first aspect.

[0022] In some embodiments, the primary coil assembly includes multiple sets of third coil assemblies, each of which is the inductor structure, and the connection terminals of the multiple sets of third coil assemblies are used to connect to an input voltage;

[0023] The secondary coil assembly includes a plurality of fourth coil assemblies, the same number as the third coil assemblies, the fourth coil assemblies being the inductor structures, and the connection terminals of the plurality of fourth coil assemblies being used to connect to the output voltage; the third coil assemblies are connected to the fourth coil assemblies in a one-to-one correspondence along the axial direction, and the winding directions of each correspondingly connected third coil assembly and fourth coil assembly are the same;

[0024] The third magnetic core is provided at the axial ends of the third coil assembly and the fourth coil assembly, and is used to magnetically connect each group of correspondingly connected third coil assemblies and fourth coil assemblies to form a magnetic flux loop.

[0025] The inductor structure provided by the embodiment of the present disclosure includes a first magnetic core and a winding, wherein the first magnetic core has a first end and a second end relative to each other, and the winding includes a first wire and a second wire, one end of the first wire is connected to the first end, and one end of the second wire is connected to the second end, and the first wire and / or the second wire is wound on the outer surface of the first magnetic core. Through the connection between the wire and the magnetic core, the magnetic core is connected in series in the winding, so that after the input voltage is connected, the induced current generated inside the magnetic core is equivalent to the working current of the winding, and the eddy current of the magnetic core is converted into a current that serves the core function of the inductor, thereby suppressing the eddy current loss of the magnetic core to the greatest extent and greatly reducing the heating of the magnetic core. And because the eddy current of the magnetic core is converted into a usable working current, the material requirements for the magnetic core are correspondingly reduced, and the processing difficulty and cost are greatly reduced.

[0026] In the inductor structure provided in the embodiment of the present disclosure, the first magnetic core is a cylindrical structure with a ring-shaped cross-section, and a first opening is provided on the first magnetic core, that is, the magnetic core as a whole is a ring-shaped cylindrical structure with an opening. The first opening can effectively block the eddy current circuit inside the magnetic core, thereby further reducing the eddy current of the iron core and reducing the heat generation of the iron core.

[0027] In the inductor structure provided in the embodiments of the present disclosure, the first magnetic core includes a plurality of magnetic core laminations, and the laminations are sequentially connected in series or in parallel via conductive wires, and an insulating layer is provided between adjacent magnetic core patches. Alternatively, the first magnetic core adopts a multi-layer winding structure, with the inner and outer ends of the winding structure forming a first end and a second end, respectively. Whether the structure is a laminated structure or a winding structure, the thin-film structure of the magnetic core effectively increases the resistance of the eddy current loop within the magnetic core, further improving the effect of suppressing the eddy current in the core.

[0028] The inductor structure provided in the disclosed embodiments further includes a third conductor wound around the outer surface of the first magnetic core and connected in parallel with the first and second conductors. The third conductor has a larger diameter than the first and second conductors. The parallel connection of the third conductor to the windings, coupled with its greater thickness, allows the majority of the excitation and operating currents to flow through the third conductor, while only a small portion of the excitation and operating currents flow through the first or second conductors. This further reduces core heating and losses.

[0029] The inductor device provided in the embodiments of the present disclosure includes multiple groups of inductor structures according to any of the above-described embodiments. The first magnetic cores of the multiple groups of inductor structures are sequentially connected axially to form an annular closed structure to form a magnetic flux loop, and the windings of the multiple groups of inductor structures are sequentially connected in series or in parallel. Thus, the magnetic flux loop is formed by the first magnetic core, eliminating the need for separately provided connecting magnetic cores to magnetically connect the multiple groups of inductor structures. This greatly simplifies the structure of the inductor device, reduces costs, and significantly improves magnetic conductivity. Furthermore, because the electronic control device includes the above-described inductor structure, it has all the aforementioned beneficial effects, which will not be elaborated on.

[0030] The transformer device provided in the disclosed embodiments includes a primary coil assembly and a secondary coil assembly. At least the higher-voltage side of the primary coil assembly employs the inductor structure described in any of the aforementioned embodiments. Because the higher-voltage side draws less operating current, core heating and losses are further reduced. Furthermore, the transformer device, including the aforementioned inductor structure, exhibits all of the aforementioned beneficial effects, which will not be further elaborated. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the specific embodiments of the present disclosure or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0032] Figure 1 Schematic diagram of the structure of the first magnetic core of the inductor structure in some embodiments of the present disclosure.

[0033] Figure 2 is a schematic cross-sectional view of an inductor structure according to some embodiments of the present disclosure.

[0034] Figure 3 Schematic cross-sectional view of an inductor structure according to some other embodiments of the present disclosure.

[0035] Figure 4 2 is a schematic cross-sectional view of an inductor structure according to some other embodiments of the present disclosure.

[0036] Figure 5 2 is a cross-sectional schematic diagram of an inductor structure in some further embodiments of the present disclosure.

[0037] Figure 6 2 is a schematic cross-sectional view of an inductor structure in some further embodiments of the present disclosure.

[0038] Figure 7 2 is a cross-sectional schematic diagram of an inductor structure in some further embodiments of the present disclosure.

[0039] Figure 8 It is a schematic diagram of the main cross-sectional structure of the reactor device in some embodiments of the present disclosure.

[0040] Figure 9 yes Figure 8 Cross-section view in the AA direction.

[0041] Figure 10 is a schematic cross-sectional view of an inductive device according to some embodiments of the present disclosure.

[0042] Figure 11 It is a schematic diagram of the main cross-sectional structure of the transformer device according to some embodiments of the present disclosure.

[0043] Figure 12 It is a schematic diagram of the main cross-sectional structure of the transformer device in other embodiments of the present disclosure. DETAILED DESCRIPTION

[0044] The technical solutions of the present disclosure will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present disclosure, not all of the embodiments. Based on the embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present disclosure. In addition, the technical features involved in the different embodiments of the present disclosure described below can be combined with each other as long as they do not conflict with each other.

[0045] An inductor is a component that converts electrical energy into magnetic energy and stores it. Reactors, transformers, and chokes used for AC power essentially all utilize the inductor principle. An inductor consists of a conductive core and windings. Common cores include solid iron cores, laminated iron cores, and powder cores. When AC current is passed through the windings, eddy currents are generated within the core due to electromagnetic induction. These eddy currents cause the core to heat up, resulting in eddy current losses. When used as a transformer, eddy currents can lead to low transformer efficiency, severe heating, and rapid aging. Therefore, the eddy current problem has always been a difficult problem in the field of AC inductors.

[0046] To address the above-mentioned issues, the disclosed embodiments provide an inductor structure, a reactance device, and a transformer device. The core inventive concept of the disclosed embodiments lies in connecting a magnetic core in series with a winding, using the core as a conductor so that the operating current flows directly through the core. This allows the induced current generated within the core to be equivalent to the winding's operating current, converting the core's eddy current into a current that serves the inductor's core function, thereby suppressing eddy current losses in the core.

[0047] In a first aspect, the present disclosure provides an inductor structure. In some embodiments, the inductor structure includes a first magnetic core and a winding, wherein the first magnetic core has a first end and a second end opposite to each other, and the winding includes a first wire and a second wire, wherein the first wire is connected to the first end of the first magnetic core, and the second wire is connected to the second end of the first magnetic core. Furthermore, the first wire and / or the second wire connected in series are wound around the outer surface of the first magnetic core to form an inductor structure, wherein the free ends of the two wires serve as the connection terminals of the inductor structure and are suitable for connection to an external voltage. When current flows through the wire coil, an induced magnetic field is generated.

[0048] As can be seen from the foregoing, the inductor structure provided by the disclosed embodiments electrically connects the magnetic core to the winding conductors, thereby generating an excitation current and an operating current within the magnetic core when an external voltage is applied. Specifically, the eddy currents in the magnetic core are converted into a current that serves the core function of the inductor, thereby minimizing eddy current losses in the core and reducing core heating. Furthermore, because the eddy currents in the core are converted into usable operating current, the material requirements for the core are correspondingly reduced, allowing the use of a pure iron core with higher magnetic permeability. This significantly reduces processing difficulty and cost, while also improving magnetic conductivity.

[0049] Figure 1 、 Figure 2 A specific embodiment of the inductor structure disclosed in the present invention is shown in FIG. Figure 1 and Figure 2 Provide specific instructions.

[0050] In this embodiment, the inductor structure includes a first magnetic core 100 and a winding. Figure 1 、 Figure 2 As shown, the first magnetic core 100 is a cylindrical structure with an annular cross-section. For example, in this embodiment, the cross-section of the first magnetic core 100 is an oblong (annular runway-shaped). A first opening 110 is formed on the first magnetic core 100. The first opening 110 extends through the first magnetic core 100 in the axial direction and extends radially into the inner cavity of the first magnetic core 100. In other words, the first magnetic core 100 as a whole forms an annular cylindrical structure with a gap.

[0051] The first opening 110 forms two opposing sidewalls on the first magnetic core 100, respectively forming a first end 111 and a second end 112 of the first magnetic core 100. The first end 111 and the second end 112 of the first magnetic core 100 are two connection terminals when the magnetic core acts as a conductor. To ensure that current can flow through the entire first magnetic core 100 and reduce eddy currents within the first magnetic core 100, the first end 111 and the second end 112 should be located at electrically opposite ends of the magnetic core structure as much as possible.

[0052] Taking this embodiment as an example, the first magnetic core 100 is a cylindrical structure with an oblong cross section. The two opposite side walls formed by the first opening 110 are the electrically opposite ends of the eddy current loop inside the magnetic core. Figure 2 As shown, the two opposite side walls respectively form a first end 111 and a second end 112 .

[0053] Of course, those skilled in the art should understand that the positions of the first end 111 and the second end 112 may be different for different structures of the first magnetic core 100. For example, for the first magnetic core 100 with a whole cubic structure, its two opposite side surfaces can serve as the first end 111 and the second end 112 respectively, which will not be enumerated in the present disclosure.

[0054] Continue to refer to Figure 2 In this embodiment, the winding is not wound directly on the surface of the first magnetic core 100. Instead, the winding includes a first wire 210 and a second wire 220. One end of the first wire 210 is connected to the first end 111 of the first magnetic core 100, and one end of the second wire 220 is connected to the second end 112. In other words, the first wire 210, the first magnetic core 100, and the second wire 220 are connected in series. The series connection of the first wire 210 and / or the second wire 220 is wound on the outer surface of the first magnetic core 100, thereby forming an inductor structure.

[0055] It is worth noting that the winding can be wound by the first wire 210 or the second wire 220 alone, or the first wire 210 and the second wire 220 can be wound on the magnetic core at the same time, and the present disclosure does not limit this. Figure 2 In the illustrated embodiment, the first conductive wire 210 is connected to the magnetic core only as a terminal, while the second conductive wire 220 is evenly wound around the first magnetic core 100 to form an induction coil.

[0056] The inductor structure formed in this embodiment is as follows Figure 2 As shown, the free ends of the first and second conductors 210, 220 form the terminals of the inductor structure, which are used to connect to an external voltage. When the inductor structure is connected to an external voltage, the applied voltage causes only the excitation current and the operating current to flow through the ends of the first magnetic core 100, preventing the formation of an eddy current loop. This reduces eddy current losses in the magnetic core.

[0057] As can be seen from the above, in this embodiment, the eddy current loss of the magnetic core is smaller. Therefore, for the material of the first magnetic core 100, a pure iron core can be used, without the need to use silicon steel laminations or magnetic powder cores. Since pure iron cores have higher magnetic permeability and are less difficult to process than laminated magnetic cores and magnetic powder cores, the use of pure iron cores can not only improve the magnetic permeability of the magnetic core, but also greatly reduce the processing difficulty and cost of the inductor. Of course, in other embodiments, the first magnetic core 100 can also use silicon steel laminations or magnetic powder cores, and the present disclosure does not necessarily limit this.

[0058] It is worth noting that in this embodiment, the first magnetic core 100 is configured as an annular cylindrical structure, so that the eddy current inside the magnetic core can form an eddy current loop according to the annular structure, and the first opening 110 can effectively block the eddy current loop, further reducing the formation of eddy current. In other embodiments, the structure of the first magnetic core 100 is not limited to this and can also be any other suitable structure.

[0059] For example, in some embodiments, the first magnetic core 100 includes a plurality of magnetic core laminations, and the plurality of magnetic core laminations are sequentially connected in series or in parallel via wires. That is, the complete first magnetic core 100 is formed by connecting the plurality of magnetic core laminations in series or in parallel.

[0060] like Figure 3 As shown, in one example, the first magnetic core 100 includes two magnetic core laminations 121 and 122, which are connected in series via a conductor 123 and separated by an insulating layer 300. The structure formed by the two magnetic core laminations connected in series is equivalent to the first magnetic core 100. The first conductor 210 is provided at one end of the magnetic core lamination 122, and the second conductor 220 is connected to one end of the magnetic core lamination 121. The second conductor 220 is wound around the overall structure formed by the two laminations, and the free ends of the first conductor 210 and the second conductor 220 serve as wiring terminals, thereby forming a complete inductor structure.

[0061] In other examples, the first magnetic core 100 may further include a greater number of magnetic core laminations. Figure 4 As shown, the first magnetic core 100 includes a total of 8 magnetic core laminations, and the laminations are connected in series by wires. An insulating layer is set between two magnetic core laminations (not shown in the figure). The settings of the first wire 210 and the second wire 220 are the same as above and will not be repeated.

[0062] In some other examples, the core laminations can be connected not only in series but also in parallel. Figure 5 As shown, the magnetic core laminations are connected in parallel through wires, and the rest of the structure is the same as above and will not be described in detail.

[0063] As can be seen from the above, in this embodiment, a magnetic core structure is formed by connecting multiple magnetic core laminations in series or in parallel. The lamination structure can increase the impedance of the eddy current circuit in the magnetic core, thereby further suppressing the eddy current loss of the magnetic core. It should be noted that this disclosure does not limit the number, shape, and connection structure of the magnetic core laminations. Based on the above disclosure, those skilled in the art can also implement other alternative embodiments, which will not be enumerated here.

[0064] In some embodiments, the first magnetic core 100 is connected in series with the winding, generating operating and excitation currents within it, which can also cause a small amount of heating. Therefore, to further reduce heating of the first magnetic core 100, the inductor structure also includes a third wire, which is connected in parallel with the first and second wires 210, 220. The third wire has a larger diameter than the first and second wires 210, 220. This third wire's parallel branch allows the majority of the excitation and operating currents to flow, further reducing heating of the magnetic core.

[0065] In one example, if Figure 6 As shown, the first magnetic core 100 and the winding structure are shown in FIG. Figure 3 The implementation method is described in detail and will not be elaborated on again. Figure 3 Based on the existing embodiment, a third conductor 230 is added. The third conductor 230 is wound around the surface of the first magnetic core 100, and its ends are connected to the first conductor 210 and the second conductor 220, respectively, forming a parallel connection structure. Because the third conductor 230 has a larger diameter than the second conductor 220, when an external voltage is applied, the majority of the operating current and excitation current flows through the parallel branch of the third conductor 230, and only a small portion of the current flows through the parallel branch formed by the first conductor 210, the first magnetic core 100, and the second conductor 220. Since the current passing through the first magnetic core 100 is relatively small, heating of the magnetic core is further reduced.

[0066] In another example, Figure 7 As shown, the first magnetic core 100 has a multi-layer winding structure, with the inner and outer ends of the winding structure forming a first end 111 and a second end 112, respectively. The number of winding layers of the first magnetic core 100 can be the same as the number of turns of the required winding coil. For example, the first magnetic core 100 is wound from a thin steel sheet, with its outer end connected to the first conductor 210 and its inner end connected to the second conductor 220. The ends of the third conductor 230 are respectively connected to the first conductor 210 and the second conductor 220, forming a parallel connection structure. When the inductor structure is connected to an external voltage, the majority of the operating current and excitation current pass through the parallel branch of the third conductor 230, and only a small portion of the current passes through the winding structure of the first magnetic core 100, thereby further reducing core heating.

[0067] It is understandable that this embodiment is not limited to the above two examples. Those skilled in the art should understand that other forms of inductor structures disclosed in the present invention are applicable to this embodiment, and they are not listed here.

[0068] As can be seen from the foregoing, the inductor structure of the disclosed embodiment connects the magnetic core in series with the winding. When the input voltage is applied, the induced current generated within the magnetic core is equivalent to the operating current of the winding. This converts the eddy current in the magnetic core into a current that serves the core function of the inductor, thereby minimizing eddy current losses in the magnetic core. Furthermore, this eliminates the need to sacrifice the magnetic conductivity of the magnetic core, reduces material requirements for the core, and significantly reduces processing difficulty and cost.

[0069] In a second aspect, the present disclosure provides an inductive device, which includes the inductive structure in any of the above embodiments.

[0070] Figure 8 、 Figure 9 A specific embodiment of the reactor device disclosed in the present invention is shown in FIG. In this embodiment, the reactor device includes a first coil assembly and a second coil assembly, and the first coil assembly and the second coil assembly are both Figure 2 Taking the inductor structure in the embodiment as an example, it is understandable that the first coil assembly and the second coil assembly can also be implemented by using the inductor structure in any of the above embodiments of the present disclosure, which will not be described in detail.

[0071] like Figure 9 As shown, in this embodiment, the two coil assemblies are connected in series, and the winding directions of the two coil assemblies are opposite, thereby forming an electromagnetic integrated coil assembly. The reactance device also includes two second magnetic cores 400, which are arranged at the axial ends of the coil assembly, so that the first coil assembly, the second coil assembly, and the second magnetic cores 400 form a complete magnetic flux circuit.

[0072] The winding direction of the coil assembly is as follows Figure 8 As shown in the figure, "⊙" represents the direction perpendicular to the paper surface. It indicates the direction perpendicular to the paper. As can be seen from the figure, when the winding is connected to the external voltage, a clockwise magnetic flux loop is generated in the reactor.

[0073] It should be noted that in this embodiment, the windings of the first coil assembly and the second coil assembly can also be connected in parallel. The principle is the same as described above and will not be repeated here. Furthermore, the second magnetic core 400 can also be made of iron core materials such as pure iron core, silicon steel laminated core, magnetic powder core, etc. To reduce eddy currents in the magnetic core, the second magnetic core 400 is preferably made of silicon steel core.

[0074] Furthermore, considering the low magnetic permeability of the silicon steel core, in order to achieve higher magnetic permeability, an inductive device is provided in other embodiments of the present disclosure, which includes multiple groups of inductive structures in any of the above embodiments, and the first magnetic cores 100 of the multiple groups of inductive structures are connected in sequence along the circumferential direction to form an annular closed structure, thereby forming a complete magnetic flux circuit, and the windings of the multiple groups of inductive structures are connected in series or in parallel in sequence.

[0075] Specifically, Figure 10 A specific example is shown in FIG. 1 . In this example, the reactance device includes four groups of inductance structures. Figure 3 Those skilled in the art will appreciate that the inductor device disclosed herein may also be formed by connecting other numbers of inductor structures in sequence, and the inductor structure is not limited to the example of this embodiment, but may also be the inductor structure in any of the above embodiments, which will not be elaborated in this disclosure.

[0076] Continue to refer to Figure 10 In this embodiment, each group of inductance structures is in the shape of an isosceles trapezoid, and the axial ends of the first magnetic cores 100 of two adjacent groups of inductance structures are connected to form a right-angle structure, that is, the four groups of inductance structures are connected in sequence to form a rectangular ring. The specific structure of each group of inductance structures can be found in the above Figure 3 The winding directions of the four inductance structures are shown in the figure. The windings of the four inductance structures can be connected in series or in parallel, so that after the external voltage is connected, a counterclockwise magnetic flux loop can be generated in the ring structure composed of the four first magnetic cores 100.

[0077] In this embodiment, a magnetic flux loop is formed by connecting multiple groups of first magnetic cores, and there is no need to set up a second magnetic core to form a magnetic flux loop, which greatly simplifies the structure of the inductor device and completely removes the silicon steel laminations, reducing costs and improving magnetic conductivity.

[0078] In a third aspect, the present disclosure provides a transformer device, which includes a primary coil assembly and a secondary coil assembly, and at least one of the primary coil assembly and the secondary coil assembly includes the inductor structure of any of the above embodiments.

[0079] The basic structure and principles of a voltage transformer are similar to those of the aforementioned reactor. When an external voltage is applied to the primary coil, it generates an excitation current and an operating current, thereby forming an induced magnetic field. The magnetic flux of this induced magnetic field passes through the secondary coil, generating an induced electromotive force and an operating current when an external load is connected. Voltage transformation is achieved by adjusting the winding ratio of the primary and secondary coils. This will be understood by those skilled in the art and will not be further elaborated in this disclosure.

[0080] In the transformer device disclosed in the present invention, only the coil component in the primary coil assembly can be improved to the inductance structure in any of the above-mentioned embodiments of the present invention, or only the coil component in the secondary coil assembly can be improved to the inductance structure in any of the above-mentioned embodiments, or both the primary coil assembly and the secondary coil assembly can be improved to the inductance structure in the embodiments of the present invention, and the present invention does not impose any restrictions on this.

[0081] In some embodiments, to further reduce core eddy currents and core heating, the inductor structure of the disclosed embodiment is preferably connected in series to the high-voltage side of the transformer. Since the high-voltage side operates at a lower current, this can further reduce core heating and losses.

[0082] From the above principles of the transformer device, it can be seen that, structurally speaking, the transformer device is equivalent to adding a set of secondary coil assemblies on the basis of the reactor device, and its basic working principle is the same. Therefore, the transformer device disclosed in the present invention can also be applied to the reactor device structure of any of the above structures.

[0083] For example, in one example, the transformer structure is as follows: Figure 11 As shown in the figure, the transformer in this example is a single-phase transformer. Figure 8 On the basis of the reactor shown in FIG, a set of secondary coil assemblies is added, and the secondary coil assembly has the same structure as the primary coil assembly. Figure 9 The same parts will not be described here in detail, as those skilled in the art can understand this example with reference to the above disclosure, so only the differences will be described.

[0084] like Figure 11 As shown, the transformer device includes a primary coil assembly 710 on the upper layer and a secondary coil assembly 720 on the lower layer. The primary coil assembly 710 is connected to the input voltage, and the secondary coil assembly 720 is used to connect to the output voltage. In this example, the input and output voltages are both single-phase voltages. The winding directions of the two coil assemblies are as follows: Figure 11 As shown in , the winding directions of the primary coil and the secondary coil of each group are the same, thereby forming a complete magnetic flux loop.

[0085] The primary coil assembly 710 is connected to an input voltage, generating an excitation current and an operating current in the coil assembly, thereby forming an induced magnetic field. The magnetic flux of the induced magnetic field passes through the secondary coil, generating an induced electromotive force in the secondary coil and an operating current when an external load is connected, thus achieving voltage transformation.

[0086] Based on similar principles, Figure 12 A three-phase transformer is shown in FIG. 1 , and its basic working principle is similar to Figure 11The example is similar, except that the coil assembly includes three groups of inductance structures, each of which is connected to a voltage of a different phase, thereby forming a three-phase transformer. Those skilled in the art will undoubtedly understand this embodiment based on the transformer principles in the relevant art, and this disclosure will not elaborate on this.

[0087] From the above, it can be seen that the transformer device provided by the present disclosure includes the above-mentioned inductor structure, which can effectively reduce eddy currents in the magnetic core, reduce heat generation, and increase the service life of the transformer device.

[0088] It is worth noting that the examples given above are only used to illustrate the transformer device and do not limit the present disclosure. Any of the above-mentioned inductive structures and reactance devices can be used as the transformer device of the present disclosure. Those skilled in the art can implement corresponding variations based on the above disclosure, and the present disclosure will not enumerate them.

[0089] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the embodiments. Those skilled in the art will appreciate that other variations or modifications can be made based on the above description. It is not necessary and impossible to enumerate all embodiments here. Obvious variations or modifications arising therefrom remain within the scope of protection of the present disclosure.

Claims

1. An inductor structure, characterized in that: include: a first magnetic core having opposing first and second ends; and a winding, comprising a first conductor and a second conductor, wherein one end of the first conductor is connected to the first end of the first magnetic core, one end of the second conductor is connected to the second end of the first magnetic core, and the first conductor and / or the second conductor are wound on an outer surface of the first magnetic core; The other ends of the first conductive line and the second conductive line form connection terminals of the inductor structure.

2. The inductor structure according to claim 1, characterized in that The first magnetic core is a cylindrical structure with a ring-shaped cross section, and a first opening is opened on the first magnetic core, and the first opening passes through the first magnetic core; the first opening forms two opposite side walls on the first magnetic core, forming the first end and the second end respectively.

3. The inductor structure according to claim 1, wherein: The first magnetic core includes a plurality of magnetic core laminations, the plurality of magnetic core laminations are sequentially connected in series or in parallel through conductive wires, and an insulating layer is provided between adjacent magnetic core laminations.

4. The inductor structure according to claim 1, wherein: The first magnetic core is a multi-layer winding structure, and the inner and outer ends of the winding structure form the first end and the second end respectively.

5. The inductor structure according to claim 1, wherein: Also includes: a third conductive wire wound on an outer surface of the first magnetic core, and the third conductive wire is connected in parallel with the first conductive wire and the second conductive wire; The third conductive wire has a larger diameter than the first conductive wire and the second conductive wire.

6. A reactor device, characterized in that: The inductor structure comprises the inductor structure according to any one of claims 1 to 5.

7. The reactor according to claim 6, characterized in that: include: a first coil assembly and a second coil assembly, wherein the first coil assembly and the second coil assembly are the inductor structure; the connection terminals of the first coil assembly and the second coil assembly are connected in series or in parallel, and the winding directions of the first coil assembly and the second coil assembly are opposite; and The second magnetic core is provided at both axial ends of the first coil assembly and the second coil assembly and is used to magnetically connect the first coil assembly and the second coil assembly to form a magnetic flux loop.

8. The reactor according to claim 6, characterized in that: include: There are multiple groups of inductance structures, and the first magnetic cores of the multiple groups of inductance structures are sequentially connected along the axial direction to form an annular closed structure to form a magnetic flux loop; and the windings of the multiple groups of inductance structures are sequentially connected in series or in parallel.

9. A voltage transformation device, characterized in that: include: A primary coil assembly and a secondary coil assembly, at least one of the primary coil assembly and the secondary coil assembly comprises the inductor structure according to any one of claims 1 to 5.

10. The voltage transformation device according to claim 9, characterized in that: The primary coil assembly includes a plurality of third coil components, each of which is the inductor structure, and the connection terminals of the plurality of third coil components are used to connect to an input voltage; The secondary coil assembly includes a plurality of fourth coil assemblies, the same number as the third coil assemblies, the fourth coil assemblies being the inductor structures, and the connection terminals of the plurality of fourth coil assemblies being used to connect to the output voltage; the third coil assemblies are connected to the fourth coil assemblies in a one-to-one correspondence along the axial direction, and the winding directions of each correspondingly connected third coil assembly and fourth coil assembly are the same; The third magnetic core is provided at the axial ends of the third coil assembly and the fourth coil assembly, and is used to magnetically connect each group of correspondingly connected third coil assemblies and fourth coil assemblies to form a magnetic flux loop.

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