CN111524686A - Inductance structure, reactance device and transformer device - Google Patents

Abstract

The disclosure relates to the technical field of transformation equipment, and particularly provides an inductance structure, a reactance device and a transformation device. Wherein, inductance structure includes: a first magnetic core having opposing first and second ends; the winding comprises a first conducting wire and a second conducting wire, one end of the first conducting wire is connected to the first end of the first magnetic core, one end of the second conducting wire is connected to the second end of the first magnetic core, and the first conducting wire and/or the second conducting wire are/is wound on the outer surface of the first magnetic core; the other ends of the first and second leads form terminals of the inductor structure. The inductance structure effectively inhibits the eddy current of the magnetic core and reduces the heat generation of the magnetic core.

Description

Inductance structure, reactance device and transformer device

Technical Field

The disclosure relates to the technical field of alternating current transformation equipment, in particular to an inductance structure, a reactance device and a transformation device.

Background

The inductor is an element capable of converting electric energy into magnetic energy for storage, and is composed of a coil and an iron core. The inductor is widely applied to various links of alternating current such as power generation, transmission, transformation, distribution and use. And the form of the inductor is varied, such as a transformer for a voltage conversion cascade; also for example reactors for reactive regulation; and chokes, etc., for example, for stabilizing circuits, are essentially inductors.

In the related art, the core eddy current caused by the electromagnetic induction principle is always a difficult problem in the field of alternating current inductors, and the eddy current causes the core to generate heat and brings eddy current loss, so that how to inhibit the core eddy current is an important research direction.

Disclosure of Invention

To solve the technical problem of inductor core eddy current, the embodiments of the present disclosure provide an inductance structure, a reactance device, and a voltage transformation device.

In a first aspect, an embodiment of the present disclosure provides an inductor structure, including:

a first magnetic core having opposing first and second ends; and

a winding including a first wire and a second wire, wherein one end of the first wire is connected to the first end of the first magnetic core, one end of the second wire is connected to the second end of the first magnetic core, and the first wire and/or the second wire is wound on the outer surface of the first magnetic core; the other ends of the first and second leads form terminals of the inductor structure.

In some embodiments, the first magnetic core is a cylindrical structure with an annular cross section, and a first opening is formed in the first magnetic core, and the first opening penetrates through the first magnetic core; the first opening forms the first end and the second end respectively at two opposite side walls formed on the first magnetic core.

In some embodiments, the first magnetic core comprises a plurality of magnetic core laminations, and the plurality of magnetic core laminations are connected in series or in parallel in sequence by a conductive wire.

In some embodiments, an insulating layer is disposed between adjacent magnetic core laminations.

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

In some embodiments, the inductor structure further includes:

the third conducting wire is wound on the outer surface of the first magnetic core and is connected with the first conducting wire and the second conducting wire in parallel; the third wire has a diameter greater than the first and second wires.

In a second aspect, embodiments of the present disclosure provide a reactance device including an inductance structure according to any one of the embodiments of the first aspect.

In some embodiments, the reactance device comprises:

the first coil component and the second coil component are the inductance structures; the terminals of the first coil component and the second coil component are connected in series or in parallel, and the winding directions of the first coil component and the second coil component are opposite; and

and the second magnetic core is arranged at the two axial ends of the first coil component and the second coil component and is used for magnetically connecting the first coil component and the second coil component to form a magnetic flux loop.

In some embodiments, the reactance device comprises:

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

In a third aspect, the present disclosure provides a voltage transformation apparatus, comprising:

a primary coil assembly and a secondary coil assembly, at least one of the primary and secondary coil assemblies comprising an inductive structure according to any one of the embodiments of the first aspect.

In some embodiments, the primary coil assembly comprises a plurality of sets of third coil components, the third coil components being the inductive structure, terminals of the plurality of sets of third coil components being for connection to an input voltage;

the secondary coil assembly comprises a plurality of groups of fourth coil assemblies which are the same as the third coil assemblies in number, the fourth coil assemblies are of the inductor structure, and terminals of the plurality of groups of fourth coil assemblies are used for connecting output voltages; the third coil assemblies and the fourth coil assemblies are connected in a one-to-one correspondence mode along the axial direction, and the winding direction of the corresponding connected third coil assemblies and the winding direction of the corresponding connected fourth coil assemblies are the same;

and the third magnetic core is arranged at the shaft ends of the third coil assembly and the fourth coil assembly and is used for magnetically connecting each group of correspondingly connected third coil assembly and fourth coil assembly to form a magnetic flux loop.

The inductor structure provided by the embodiment of the present disclosure includes a first magnetic core and a winding, the first magnetic core has a first end and a second end opposite to each other, the winding includes a first conducting wire and a second conducting wire, one end of the first conducting wire is connected to the first end, one end of the second conducting wire is connected to the second end, and the first conducting wire and/or the second conducting wire is wound around an outer surface of the first magnetic core. Through the connection of wire and magnetic core, connect the magnetic core in series in the winding to after the access input voltage, the induced current that produces in the magnetic core is equal to the operating current of winding promptly, turns into the electric current that serves inductance core function with the vortex of magnetic core, thereby furthest's suppression magnetic core eddy current loss, greatly reduced magnetic core generates heat. And because the eddy current of the magnetic core is converted into available working current, the requirement on the material of the magnetic core is correspondingly reduced, and the processing difficulty and the cost are greatly reduced.

The inductance structure that this disclosed embodiment provided, first magnetic core is the transversal annular cylinder structure of personally submitting, and has seted up first opening on first magnetic core, and magnetism is whole for having open-ended annular cylinder structure promptly, and the inside vortex return circuit of magnetic core can effectively be blocked to first opening to further reduce the iron core vortex, reduce the iron core and generate heat.

The inductance structure that this disclosed embodiment provided, first magnetic core includes a plurality of magnetic core laminations, and the lamination passes through the wire and connects in series or parallelly connected in proper order to be provided with the insulating layer between the adjacent magnetic core paster. Or the first magnetic core adopts a multilayer winding structure, and the inner end and the outer end of the winding structure form a first end and a second end respectively. No matter the laminated structure or the winding structure is adopted, the magnetic core is set to be of the sheet structure, so that the resistance of a vortex circuit in the magnetic core is effectively increased, and the suppression effect on the eddy current of the iron core is further improved.

The inductor structure provided by the embodiment of the present disclosure further includes a third wire, the third wire is wound around the outer surface of the first magnetic core, and the third wire is connected in parallel with the first wire and the second wire, and the diameter of the third wire is larger than the first wire and the second wire. And the third wire is connected in parallel with the winding and is thicker than the first wire and the second wire, so that most of the exciting current and the working current pass through the third wire, and only a small part of the exciting current and the working current pass through the first wire or the second wire, thereby further reducing the heat generation of the magnetic core and reducing the loss.

The reactance device provided by the embodiment of the disclosure comprises a plurality of groups of inductance structures in any one of the above embodiments, the first magnetic cores of the plurality of groups of inductance structures are sequentially connected along the axial direction to form an annular closed structure so as to form a magnetic flux loop, and the windings of the plurality of groups of inductance structures are sequentially connected in series or in parallel. Thereby form the magnetic flow return circuit through first magnetic core, need not to set up alone again and connect the magnetic core and come magnetism to connect multiunit inductance structure, simplified reactance device structure greatly, reduce cost to improve magnetic conductivity greatly. And because the electric control device comprises the inductance structure, all the beneficial effects are achieved, and the description is omitted.

The transformer device provided by the embodiment of the disclosure comprises a primary coil assembly and a secondary coil assembly, wherein the inductor structure in any embodiment is adopted on at least one side with higher voltage, and the working current is smaller on the side with higher voltage, so that the heat generation of an iron core can be further reduced, and the loss is reduced. And because the transformation device comprises the inductance structure, all the beneficial effects are achieved, and the description is omitted.

Drawings

In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present disclosure, and other drawings can be obtained by those skilled in the art without creative efforts.

Fig. 1 is a schematic diagram of a first core of an inductive structure according to some embodiments of the present disclosure.

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

Fig. 3 is a schematic cross-sectional view of an inductor structure according to further embodiments of the present disclosure.

Fig. 4 is a cross-sectional schematic view of an inductor structure according to further embodiments of the present disclosure.

Fig. 5 is a cross-sectional schematic view of an inductor structure according to still further embodiments of the present disclosure.

Fig. 6 is a cross-sectional schematic view of an inductor structure according to still further embodiments of the present disclosure.

Fig. 7 is a cross-sectional schematic view of an inductor structure according to still further embodiments of the present disclosure.

Fig. 8 is a schematic cross-sectional front view of a reactive device in accordance with some embodiments of the present disclosure.

Fig. 9 is a cross-sectional view taken along the line a-a in fig. 8.

Fig. 10 is a cross-sectional schematic diagram of a reactive device in some embodiments according to the present disclosure.

Fig. 11 is a front cross-sectional structural schematic view of a pressure changing device according to some embodiments of the present disclosure.

Fig. 12 is a front cross-sectional structural schematic view of a pressure changing device according to further embodiments of the present disclosure.

Detailed Description

The technical solutions of the present disclosure will be described clearly and completely with reference to the accompanying drawings, and it is to be understood that the described embodiments are only some embodiments of the present disclosure, but not all embodiments. All other embodiments, which can be derived by one of ordinary skill in the art from the embodiments disclosed herein without making any creative effort, shall fall within the protection scope of the present disclosure. In addition, technical features involved in different embodiments of the present disclosure described below may be combined with each other as long as they do not conflict with each other.

An inductor is a component that can convert electric energy into magnetic energy and store the magnetic energy, and a reactor, a transformer, a choke, and the like for alternating current essentially use the principle of the inductor. The inductance includes conductor magnetic core and winding, and common magnetic core such as monoblock pure iron core, lamination core and magnetic powder core etc. after letting in the alternating current to the winding, because electromagnetic induction's effect can produce the vortex in the magnetic core is inside, and the vortex can lead to the magnetic core to generate heat to bring the eddy current loss. When the transformer is used as a transformer, the eddy current causes the transformer to have low efficiency, serious heat generation and quick aging, so the eddy current problem is always a difficult problem in the field of alternating current inductors.

In order to solve the above problems, embodiments of the present disclosure provide an inductance structure, a reactance device, and a voltage transformation device. The core inventive concept of the disclosed embodiment is as follows: the magnetic core is connected in series into the winding, the magnetic core is used as a conductor, and the working current directly flows through the magnetic core, so that the induced current generated in the magnetic core is equal to the working current of the winding, the eddy current of the magnetic core is converted into the current serving the inductance core function, and the eddy current loss of the magnetic core is restrained.

In a first aspect, the present disclosure provides an inductive structure. In some embodiments, an inductive structure includes a first magnetic core having opposing first and second ends and a winding including first and second conductive wires, the first conductive wire connected to the first end of the first magnetic core and the second conductive wire connected to the second end of the first magnetic core. And the first wire and/or the second wire after being connected in series are wound on the outer surface of the first magnetic core, so that an inductance structure is formed, the free ends of the two wires are used as the wiring ends of the inductance structure and are suitable for being connected with external voltage, and when current flows through a wire coil, an induction magnetic field can be generated.

As can be seen from the above, according to the inductance structure provided by the embodiment of the present disclosure, the magnetic core is electrically connected to the winding wire, so that when a voltage is applied, an exciting current and an operating current are formed inside the magnetic core, that is, an eddy current of the magnetic core is converted into a current serving as an inductance core function, thereby suppressing an eddy current loss of the iron core to the maximum extent and reducing heat generation of the iron core. And because the eddy current of the magnetic core is converted into available working current, the requirement on the material of the magnetic core is correspondingly reduced, and a pure iron core with higher magnetic permeability is adopted, so that the processing difficulty and cost are greatly reduced, and the magnetic permeability is improved.

An embodiment of the disclosed inductor structure is shown in fig. 1 and 2, and is described in detail below with reference to fig. 1 and 2.

In this embodiment, the inductance structure includes a first magnetic core 100 and a winding. As shown in fig. 1 and 2, the first magnetic core 100 has a cylindrical structure with an annular cross section, and in the present embodiment, for example, the first magnetic core 100 has an oblong cross section (an annular race track shape). First opening 110 is opened on first magnetic core 100, and first opening 100 runs through first magnetic core 100 along axial direction, runs through to first magnetic core 100 inner chamber along radial direction, and first magnetic core 100 forms the annular cylinder structure with the breach on the whole.

The first opening 110 is formed on opposite sidewalls of the first magnetic core 100 to form a first end 111 and a second end 112 of the first magnetic core 100, respectively. First end 111 and second end 112 of first magnetic core 100 refer to two terminals in the case of a magnetic core as a conductor, and in order to allow current to pass through the entire first magnetic core 100 and reduce eddy currents inside first magnetic core 100, first end 111 and second end 112 should be located at two electrically opposite ends of the magnetic core structure as much as possible.

Taking this embodiment as an example, the first magnetic core 100 is a cylindrical structure with an oval cross section, and two opposite side walls formed by the first opening 110 are electrically opposite ends of the eddy current loop inside the magnetic core, so as to form a first end 111 and a second end 112 on the two opposite side walls, respectively, as shown in fig. 2.

Of course, it should be understood by those skilled in the art that the positions of the first end 111 and the second end 112 may be different for different configurations of the first magnetic core 100, for example, for a one-piece cubic first magnetic core 100, the two opposite sides thereof may be respectively used as the first end 111 and the second end 112, which is not enumerated in the present disclosure.

With continued reference to fig. 2, in this embodiment, the winding is not directly wound on the surface of the first magnetic core 100, but the winding includes a first conducting wire 210 and a second conducting wire 220, one end of the first conducting wire 210 is connected to the first end 111 of the first magnetic core 100, and one end of the second conducting wire 220 is connected to the second end 112. That is, the first wire 210, the first magnetic core 100, and the second wire 200 are sequentially connected in series. The first conducting wire 210 and/or the second conducting wire 200 after being connected in series are wound on the outer surface of the first magnetic core 100, so as to form an inductance structure.

It should be noted that, in the winding of the winding, the first conducting wire 210 or the second conducting wire 220 may be wound separately, or the first conducting wire 210 and the second conducting wire 220 may be wound on the magnetic core at the same time, which is not limited by the present disclosure. For example, in the embodiment shown in fig. 2, the first conductive wire 210 is connected to the magnetic core only as a terminal, and the second conductive wire 220 is uniformly wound on the first magnetic core 100 to form an induction coil.

In the inductor structure formed in this embodiment as shown in fig. 2, the free ends of the first conductive line 210 and the second conductive line 220 form the terminals of the inductor structure, and the two terminals are used for connecting an external voltage. When the inductor structure is connected to an external voltage, only an exciting current and a working current can be formed inside the first magnetic core 100 due to the existence of the external voltage, and an eddy current loop cannot be formed, so that the eddy current loss of the magnetic core is reduced.

As described above, in the present embodiment, since the eddy current loss of the magnetic core is smaller, it is sufficient to use a pure iron core for the material of the first magnetic core 100, and it is not necessary to use a silicon steel lamination or a magnetic powder core. Because pure iron core compares in lamination magnetic core and magnetic powder core, magnetic conductivity is higher, and the processing degree of difficulty is lower, consequently adopts pure iron core can improve the magnetic conductivity of magnetic core on the one hand, on the other hand also greatly reduced the processing degree of difficulty and the cost of inductance. Of course, in other embodiments, the first magnetic core 100 may also be a silicon steel lamination or a magnetic powder core, which is not necessarily limited by the present disclosure.

It should be noted that, in the present embodiment, the first magnetic core 100 is configured as an annular cylinder 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 the eddy current. In other embodiments, the structure of the first magnetic core 100 is not limited to this, and may be any other structure suitable for implementation.

For example, in some embodiments, first magnetic core 100 includes a plurality of magnetic core laminations that are sequentially connected in series or in parallel by a conductive wire. That is, a complete first magnetic core 100 is formed by series-parallel connection of a plurality of magnetic core laminations.

As shown in fig. 3, in one example, first magnetic core 100 includes two core laminations 121, 122, core laminations 121, 122 are connected in series by a wire 123, and the two core laminations are separated by an insulating layer 300 disposed therebetween. The structure in which two core laminations are integrally formed in series corresponds to the first core 100, the first conductive wire 210 is disposed at one end of the core lamination 122, the second conductive wire 220 is connected to one end of the core lamination 121, and the second conductive wire 220 is wound on the integral structure formed by the two laminations, and the free ends of the first conductive wire 210 and the second conductive wire 220 serve as terminals, thereby forming a complete inductor structure.

In other examples, first magnetic core 100 may also include a greater number of magnetic core laminations. For example, as shown in fig. 4, the first magnetic core 100 includes 8 magnetic core laminations, and the laminations are connected in series by a conductive wire, and an insulating layer (not shown in the drawings) is disposed between two magnetic core laminations for separation, and the arrangement of the first conductive wire 210 and the second conductive wire 220 is the same as that described above, and is not described again.

In still other examples, the core laminations may be connected not only in series, but also in parallel. For example, as shown in fig. 5, the core laminations are connected in parallel by wires, and the rest of the structure is the same as that described above, and is not described again.

As can be seen from the above, in the present embodiment, the core structure is formed by connecting a plurality of core laminations in series or in parallel, and the lamination structure can increase the impedance of the eddy current loop in the core, thereby further suppressing the eddy current loss of the core. It should be noted that the number, shape and connection structure of the core laminations are not limited by the present disclosure, and those skilled in the art can implement other alternative embodiments based on the above disclosure, which are not enumerated herein.

In some embodiments, considering that the first magnetic core 100 is connected in series in the winding, the internal generation of the operating current and the exciting current may also cause a small amount of heat generation of the magnetic core. Therefore, in order to further reduce the heat generated by the first magnetic core 100, the inductor structure further includes a third conductive wire, which is connected in parallel to the first conductive wire 210 and the second conductive wire 220, and has a larger diameter than the first conductive wire 210 and the second conductive wire 220. Therefore, the heating of the magnetic core is further reduced by utilizing the parallel branch of the third lead through most of exciting current and working current.

In an example, as shown in fig. 6, the first magnetic core 100 and the winding structure may be described with reference to the embodiment of fig. 3, and are not described again. In this example, a third conducting wire 230 is added on the basis of the embodiment shown in fig. 3, the third conducting wire 230 is wound on the surface of the first magnetic core 100, and two ends of the third conducting wire 230 are respectively connected to the first conducting wire 210 and the second conducting wire 220, so as to form a parallel connection structure. Since the third conductive wire 230 has a larger diameter than the second conductive wire 220, when an external voltage is applied, most of the operating current and the excitation current pass through the parallel branch of the third conductive wire 230, and only a small part of the current passes through the parallel branch formed by the first conductive wire 210, the first magnetic core 100, and the second conductive wire 220. Since the current through first magnetic core 100 is smaller, the core heating is further reduced.

In another example, as shown in fig. 7, the first magnetic core 100 has a multi-layer winding structure, and the inner and outer ends of the winding structure form a first end 111 and a second end 112, respectively, and the number of winding layers of the first magnetic core 100 may be the same as the number of turns of the required winding coil. For example, the first magnetic core 100 is formed by winding a thin steel sheet, the outer end of the thin steel sheet is connected to the first conducting wire 210, the inner end of the thin steel sheet is connected to the second conducting wire 220, and two ends of the third conducting wire 230 are respectively connected to the first conducting wire 210 and the second conducting wire 220, thereby forming a parallel connection structure. When the inductor structure is connected to an external voltage, most of the operating current and the excitation current pass through the parallel branch of the third conductive line 230, and only a small amount of current passes through the winding structure of the first magnetic core 100, thereby further reducing the heat generation of the magnetic core.

It is to be understood that the present embodiment is not limited to the above two examples, and those skilled in the art should understand that other forms of inductance structures in the present disclosure are applicable to the present embodiment and will not be enumerated here.

As can be seen from the above, in the inductance structure according to the embodiment of the present disclosure, the magnetic core is connected in series to the winding, so that after the input voltage is applied, the induced current generated inside the magnetic core is equal to the working current of the winding, and the eddy current of the magnetic core is converted into the current serving as the core function of the inductance, thereby suppressing the eddy current loss of the magnetic core to the maximum extent. And the magnetic conductivity of the magnetic core is not required to be sacrificed, the requirement on the material of the magnetic core is reduced, and the processing difficulty and the cost are greatly reduced.

In a second aspect, the present disclosure provides a reactance device comprising an inductive structure according to any of the above embodiments.

One specific embodiment of the reactance device of the present disclosure is shown in fig. 8 and 9. In the present embodiment, the reactance means includes a first coil component and a second coil component, and the first coil component and the second coil component are both exemplified by the inductance structure in the embodiment of fig. 2. It is understood that the first coil component and the second coil component may also be implemented by using the inductor structure in any of the above embodiments of the present disclosure, and details are not described herein again.

As shown in fig. 9, in the present embodiment, two coil assemblies are connected in series, and the winding directions of the windings of the two coil assemblies are opposite, thereby forming an electromagnetic integrated coil assembly. The reactance means further comprises two second magnetic cores 400, the second magnetic cores 400 being arranged at both axial ends of the coil assembly, such that the first coil assembly, the second coil assembly and the second magnetic cores 400 form a complete magnetic flux circuit.

The winding direction of the coil assembly is shown in fig. 8, in which "⊙" represents the direction perpendicular to the paper surface,

indicating a direction into the page perpendicular to the plane of the page. As can be seen from the figure, when the winding is energized with an external voltage, a clockwise magnetic flux circuit is generated in the reactor.

It should be noted that, in this embodiment, the windings of the first coil component and the second coil component may also be connected in parallel, and the principle is the same as that described above, and thus the description is omitted. Further, the second magnetic core 400 may also be made of an iron core material such as a pure iron core, a laminated silicon steel core, or a magnetic powder core, and the second magnetic core 400 is preferably made of a silicon steel core in order to reduce core eddy current.

Further, considering that the magnetic permeability of the silicon steel core is low, in order to achieve higher magnetic permeability, in other embodiments of the present disclosure, a reactance device is provided, and the reactance device includes multiple sets of inductance structures in any one of the above embodiments, the first magnetic cores 100 of the multiple sets of inductance structures are sequentially connected along the circumferential direction to form an annular closed structure, so as to form a complete magnetic flux loop, and the windings of the multiple sets of inductance structures are sequentially connected in series or in parallel.

Specifically, a specific example is shown in fig. 10, and in this example, the reactance means includes four sets of inductance structures, which are exemplified by the inductance structure in fig. 3. Those skilled in the art can understand that the reactance device of the present disclosure may also be formed by sequentially connecting other numbers of inductance structures, and the inductance structure is not limited to the example of this embodiment, and may also be an inductance structure in any of the above embodiments, which is not described herein again.

With reference to fig. 10, in the present embodiment, each group of inductor structures is in an isosceles trapezoid shape, and one axial end of the first magnetic core 100 of each two adjacent groups of inductor structures is connected to form a right-angle structure, that is, four groups of inductor structures are sequentially connected end to form a rectangular ring shape. The specific structure of each group of inductor structures may be as shown in the above embodiment of fig. 3, and is not described herein again. The winding directions of the four sets of inductance structures are shown in the figure, and the windings of the four sets of inductance structures can be connected in series or in parallel, so that after an external voltage is connected, a magnetic flux loop in a counterclockwise direction can be generated in the annular structure formed by the four first magnetic cores 100.

In this embodiment, form the magnetic flux return circuit through the connection of the first magnetic core of multiunit, need not to set up the second magnetic core again and form the magnetic flux return circuit, simplified reactance device structure greatly to the silicon steel lamination of removing completely, reduce cost just improves magnetic permeability.

In a third aspect, the present disclosure provides a transformer apparatus comprising a primary winding assembly and a secondary winding assembly, at least one of the primary winding assembly and the secondary winding assembly comprising an inductor structure according to any of the embodiments described above.

The basic structure and principle of the transformer device are similar to those of the reactance device, and when external voltage is applied to the primary coil, the primary coil generates exciting current and working current, so that an induction magnetic field is formed. The magnetic flux of the induction magnetic field passes through the secondary coil, the induced electromotive force and the working current when the load is externally connected are formed in the secondary coil, and the transformation can be realized by adjusting the winding ratio of the primary coil and the secondary coil. It will be understood by those skilled in the art that the present disclosure is not described in detail.

In the voltage converter of the present disclosure, only the coil component in the primary coil assembly may be modified to the inductance structure in any of the above embodiments of the present disclosure, only the coil component in the secondary coil assembly may be modified to the inductance structure in any of the above embodiments, or both the primary coil assembly and the secondary coil assembly may be modified to the inductance structure in the embodiments of the present disclosure, which is not limited by the present disclosure.

In some embodiments, in order to further reduce core eddy current and reduce core heating, it is preferable to connect the inductance structure of the embodiments of the present disclosure in series on the high-voltage side of the transformer device. Because the high-voltage side working current is lower, the heating of the magnetic core can be further reduced, and the loss is reduced.

As can be seen from the above principle of the transformer device, the transformer device is equivalent to a reactance device and is added with a set of secondary coil assemblies in structure, and the basic operation principle is the same, so the transformer device of the present disclosure can be applied to the reactance device structure of any one of the above structures.

For example, in one example, the transformer apparatus is configured as shown in fig. 11, and in this example, the transformer apparatus is a single-phase transformer. In this example, the transformer apparatus is added with a set of secondary coil assemblies on the basis of the reactance device shown in fig. 8, and the secondary coil assemblies and the primary coil assemblies have the same structure and are all the structures shown in fig. 9. For the same, no further details are given here, and the present example will be understood by those skilled in the art with reference to the foregoing disclosure, and therefore only the differences will be explained.

As shown in fig. 11, the transformer device includes an upper primary coil assembly 710 and a lower secondary coil assembly 720, the primary coil assembly 710 is connected to an input voltage, and the secondary coil assembly 720 is connected to an output voltage. In this example, the input and output voltages are single-phase voltages. The winding direction of the two sets of coil assemblies is shown in fig. 11, that is, the winding direction of the primary coil and the secondary coil of each set is the same, so as to form a complete magnetic flux loop.

The primary coil assembly 710 receives an input voltage to generate an excitation current and an operating current in the coil elements, thereby forming an induced magnetic field. The magnetic flux of the induction magnetic field passes through the secondary coil, and induced electromotive force and working current when the load is externally connected are formed in the secondary coil, so that transformation is realized.

Fig. 12 shows a three-phase transformation device based on similar principles, and the basic operation principle is similar to that of the example in fig. 11, except that the coil assembly includes three sets of inductance structures, and each set of inductance structures is respectively connected with voltages of different phases, so as to form the three-phase transformation device. The present embodiment can be understood by those skilled in the art based on the transformation principle in the related art, and the detailed description of the present disclosure is omitted.

Therefore, the transformer device provided by the disclosure comprises the inductance structure, so that the eddy current of the magnetic core can be effectively reduced, the heat generation is reduced, and the service life of the transformer device is prolonged.

It should be noted that the above examples are only for illustrating the transformer apparatus, and do not limit the disclosure, and any form of the inductance structure and the reactance device may be used as the transformer apparatus of the disclosure, and those skilled in the art may implement corresponding modifications on the basis of the above disclosure, and the disclosure is not enumerated herein.

It should be understood that the above embodiments are only examples for clearly illustrating the present invention, and are not intended to limit the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications of the present disclosure may be made without departing from the scope of the present disclosure.

Claims (10)

1. An inductive structure, comprising:

a first magnetic core having opposing first and second ends; and

a winding including a first wire and a second wire, wherein one end of the first wire is connected to the first end of the first magnetic core, one end of the second wire is connected to the second end of the first magnetic core, and the first wire and/or the second wire is wound on the outer surface of the first magnetic core; the other ends of the first and second leads form terminals of the inductor structure.

2. The inductive structure of claim 1,

the first magnetic core is of a cylinder structure with an annular cross section, a first opening is formed in the first magnetic core, and the first opening penetrates through the first magnetic core; the first opening forms the first end and the second end respectively at two opposite side walls formed on the first magnetic core.

3. The inductive structure of claim 1,

first magnetic core includes a plurality of magnetic core laminations, and is a plurality of the magnetic core lamination passes through the wire and establishes ties in proper order or parallelly connected, and is provided with the insulating layer between the adjacent magnetic core lamination.

4. The inductive structure of claim 1,

the first magnetic core is of a multilayer winding structure, and the first end and the second end are formed at the inner end and the outer end of the winding structure respectively.

5. The inductive structure of claim 1, further comprising:

the third conducting wire is wound on the outer surface of the first magnetic core and is connected with the first conducting wire and the second conducting wire in parallel; the third wire has a diameter greater than the first and second wires.

6. A reactive device, characterized by comprising an inductive structure according to any of claims 1 to 5.

7. The reactance device of claim 6, comprising:

the first coil component and the second coil component are the inductance structures; the terminals of the first coil component and the second coil component are connected in series or in parallel, and the winding directions of the first coil component and the second coil component are opposite; and

and the second magnetic core is arranged at the two axial ends of the first coil component and the second coil component and is used for magnetically connecting the first coil component and the second coil component to form a magnetic flux loop.

8. The reactance device of claim 6, comprising:

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

9. A voltage transformation device, comprising:

a primary coil assembly and a secondary coil assembly, at least one of the primary and secondary coil assemblies comprising an inductive structure according to any one of claims 1 to 5.

10. The transforming device of claim 9,

the primary coil assembly comprises a plurality of groups of third coil components, the third coil components are of the inductance structure, and the terminals of the plurality of groups of third coil components are used for connecting input voltage;

the secondary coil assembly comprises a plurality of groups of fourth coil assemblies which are the same as the third coil assemblies in number, the fourth coil assemblies are of the inductor structure, and terminals of the plurality of groups of fourth coil assemblies are used for connecting output voltages; the third coil assemblies and the fourth coil assemblies are connected in a one-to-one correspondence mode along the axial direction, and the winding direction of the corresponding connected third coil assemblies and the winding direction of the corresponding connected fourth coil assemblies are the same;

and the third magnetic core is arranged at the shaft ends of the third coil assembly and the fourth coil assembly and is used for magnetically connecting each group of correspondingly connected third coil assembly and fourth coil assembly to form a magnetic flux loop.

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