Self-coupling voltage regulator and winding method thereof

Abstract

The invention discloses a self-coupling voltage regulator and a winding method thereof, and the self-coupling voltage regulator is characterized in that the self-coupling voltage regulator comprises an iron core and a winding wire, and the winding wire is wound along the axial direction of the iron core; a plurality of end positions are arranged on the circumferential surface of the iron core at equal intervals; the method comprises the following steps: 1, winding a starting end of a winding wire at a first end position of an iron core along a preset direction to form a first circle, and winding at a second end position along the preset direction to form a second circle; 2, a third circle is formed above the first circle in the preset direction in a winding mode, and a fourth circle is formed at the third end position in the preset direction in a winding mode; and 3, the step 2 is executed repeatedly in sequence, the n + 2th circle is formed above the nth circle in the preset direction in a winding mode, the n + 3th circle is formed at the n + 2th end position in the preset direction in a winding mode, and n is larger than or equal to 1 till end position winding is completed. By the adoption of the self-coupling voltage regulator and the winding method thereof, the voltage between the upper layer and the lower layer is greatly reduced compared with the prior art, installation of interlayer insulating plates is omitted, and the winding size and cost are reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of voltage regulators and relates to an autotransformer and its winding method. Background Art

[0002] A voltage regulator is an electronic device or circuit used to stabilize and regulate voltage. Its core function is to convert the input voltage into a stable output voltage to meet the power consumption requirements of different devices or systems. Voltage regulators are widely used in the fields of electric power, electronics, communication, industrial control, etc., and are key components to ensure the safe operation of equipment and extend its service life. In the winding process of traditional voltage regulators, the windings are wound layer by layer, which will cause the voltage between layers to increase, thereby increasing the risk of breakdown. The conventional method is to add an insulating layer between two layers of windings.

[0003] Existing test boxes have the problem of being inconvenient to carry. The voltage regulator is one of the components of the relay protection test box, and adjusting the volume of the voltage regulator becomes a key consideration factor. Therefore, how to remove the insulating layer of the voltage regulator to reduce the winding volume is an urgent problem to be overcome. Summary of the Invention

[0004] To solve the above problems, the present invention adopts the following technical solutions:

[0005] In a first aspect, a winding method for an autotransformer includes an iron core and a winding wire, and the winding wire is wound along the axial direction of the iron core; a plurality of end positions are equally spaced on the circumferential surface of the iron core;

[0006] Step 1: The starting end of the winding wire is wound along a preset direction around the first end position of the iron core to form a first turn, and is wound along the preset direction around the second end position to form a second turn;

[0007] Step 2: A third turn is wound along the preset direction above the first turn, and a fourth turn is wound along the preset direction around the third end position;

[0008] Step 3: Step 2 is repeatedly executed in sequence. A (n + 2)-th turn is wound along the preset direction above the n-th turn, and a (n + 3)-th turn is wound along the preset direction around the (n + 2)-th end position, where n ≥ 1, until the winding of all end positions is completed.

[0009] As a further solution of the present invention: The winding wires are closely attached to each other in each turn.

[0010] As a further solution of the present invention: The winding wire is composed of enameled wire.

[0011] As a further solution of the present invention: The winding wire is a single enameled wire or a bundle of enameled wires.

[0012] As a further solution of the present invention: The iron core is an annular iron core or a cylindrical iron core.

[0013] As a further solution of the present invention: the end position of the iron core is a groove structure.

[0014] As a further solution of the present invention: the preset direction is the same direction, either clockwise or counterclockwise.

[0015] As a further solution of the present invention: Step 4: Manufacture three sets of windings according to Steps 1 to 3, and connect the winding wires of the three sets of windings to form a three-phase voltage regulator.

[0016] As a further solution of the present invention: the wire diameters of the winding wires of the three sets of windings can be the same or different.

[0017] Second aspect, an autotransformer prepared by the winding method of the autotransformer according to any one of the above.

[0018] Advantages of the present invention:

[0019] An autotransformer and its winding method. During winding, the first and second turns are placed in the lower layer, the third turn is placed in the upper layer, the fourth turn is placed in the lower layer again, the fifth turn is placed in the upper layer, and so on for winding. By adopting this vertical winding method, the voltage between the upper and lower layers is significantly reduced compared with the past, thereby eliminating the installation of the interlayer insulating board and reducing the winding volume and cost. Description of the drawings

[0020] Figure 1 is a schematic diagram of the steps of a winding method of an autotransformer of the present invention;

[0021] Figure 2 is a schematic diagram of the steps of another winding method of an autotransformer of the present invention;

[0022] Figure 3 is a schematic structural diagram of a conventional autotransformer;

[0023] Figure 4 is a schematic structural diagram of an autotransformer of the present invention;

[0024] Figure 5 is a schematic structural diagram of the end position of the iron core;

[0025] Figure 6 is a schematic structural diagram of another end position of the iron core;

[0026] As shown in the figure: 1 - iron core, 2 - winding wire, 3 - insulating layer, 4 - groove. Detailed implementation manners

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present application in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. It should be understood that the present application is not limited by the exemplary embodiments disclosed herein. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of the present application.

[0028] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0029] In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality" means two or more, unless otherwise specifically defined.

[0030] In the embodiments of the present invention, unless otherwise clearly defined and limited, the terms "mounted", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] As Figure 3 shown, it is the winding method of a voltage regulator in the prior art. During the winding process, it is wound layer by layer. In order to avoid the breakdown phenomenon caused by the relatively high winding voltage between layers, an insulating layer 3 is added between two layers of windings.

[0032] Embodiment 1

[0033] As Figure 1 and 4 shown, a winding method of an autotransformer voltage regulator includes an iron core 1 and a winding wire 2, and the winding wire 2 is wound along the axial direction of the iron core 1; several end positions are equally spaced on the circumferential surface of the iron core 1;

[0034] Step 1: The starting end of the winding wire 2 winds to form the first turn along the preset direction at the first end position of the iron core 1 and forms the second turn along the preset direction at the second end position.

[0035] Step 2: Wind to form the third turn along the preset direction above the first turn and form the fourth turn along the preset direction at the third end position.

[0036] Step 3: Repeat Step 2 in sequence. Wind to form the (n + 2)-th turn along the preset direction above the n-th turn and form the (n + 3)-th turn along the preset direction at the (n + 2)-th end position, where n ≥ 1, until the winding at the end positions is completed.

[0037] Specifically, the end positions are virtually set. The winding wire starts to wind at any position of the iron core 1, and the starting position is the first end position. As Figure 4 shown, the starting end of the winding wire winds to form the first turn along the preset direction at the first end position of the iron core 1 and forms the second turn at the second end position; after two turns are wound to form a basis, the third turn winds above the first turn, the fourth turn winds back to the lower layer beside the second turn, the fifth turn winds above the second turn, the sixth turn winds back to the lower layer beside the fourth turn, and so on, winding one above the other to form a double-layer longitudinal winding structure.

[0038] Therefore, for a winding method of an autotransformer, during winding, the first turn and the second turn are placed in the lower layer, the third turn is placed in the upper layer, the fourth turn is placed in the lower layer again, the fifth turn is placed in the upper layer, and so on for winding. By adopting this longitudinal winding method, the voltage between the upper and lower layers is significantly reduced compared with the past, thus eliminating the installation of the interlayer insulating board and reducing the winding volume and cost.

[0039] In this embodiment, each turn of the winding wire is closely attached to each other. Specifically, during the winding process, each turn of the winding wire is closely attached to each other to ensure the integrity and stability of the winding. The closely attached winding wires can reduce the air gap inside the winding, reduce magnetic leakage and loss, use the iron core with the smallest volume under the condition of ensuring the magnetic strength, and improve the efficiency of the voltage regulator.

[0040] In this embodiment, the winding wire is composed of enameled wire. Specifically, the enameled wire has good insulation performance and conductivity and can meet the working requirements of the voltage regulator.

[0041] In this embodiment, the winding wire is a single enameled wire or a bundle of enameled wires. Specifically, when using a bundle of enameled wires, the cross-sectional area of the winding can be increased, the current-carrying capacity of the winding can be improved, and at the same time, the heat dissipation performance of the winding can also be improved.

[0042] In this embodiment, the iron core is an annular iron core or a cylindrical iron core. Specifically, the annular iron core has advantages such as uniform magnetic circuit and small magnetic leakage, and is suitable for occasions with high requirements for the performance of the voltage regulator; the cylindrical iron core has advantages such as simple structure and mature manufacturing process, and is suitable for general voltage regulator applications. It can be selected according to the specific usage scenario.

[0043] In this embodiment, the end position of the iron core is a groove structure. Specifically, the circumferential surface of the iron core is not ordinary smooth, but is set as a groove structure. As Figure 5 shown in the front view of the iron core, the grooves 4 are provided at both ends of the iron core, which is convenient for winding and fixing the position of the winding wire. As Figure 6 shown in the front view of the iron core, the grooves 4 are arranged on the entire circumferential surface, which can increase the contact area between the winding and the iron core, improve the fixing and stability of the winding, and is also beneficial to the heat dissipation of the winding.

[0044] In this embodiment, the preset direction is the same direction, either the clockwise direction or the counterclockwise direction. Specifically, the winding method in the same direction can ensure that the magnetic flux directions of the windings are consistent, improving the performance and reliability of the voltage regulator.

[0045] Embodiment 2

[0046] As Figure 2 and 4 shown, a winding method for an autotransformer includes an iron core 1 and a winding wire 2, and the winding wire 2 is wound along the axial direction of the iron core 1; several end positions are set at equal intervals on the circumferential surface of the iron core 1;

[0047] Step 1: The starting end of the winding wire 2 winds along the preset direction around the first end position of the iron core 1 to form the first turn, and winds along the preset direction around the second end position to form the second turn;

[0048] Step 2: Wind along the preset direction above the first turn to form the third turn, and wind along the preset direction around the third end position to form the fourth turn;

[0049] Step 3: Repeat Step 2 in sequence. Wind along the preset direction above the nth turn to form the (n + 2)th turn, and wind along the preset direction around the (n + 2)th end position to form the (n + 3)th turn, where n ≥ 1, until the winding at the end positions is completed.

[0050] Step 4: Manufacture three groups of windings according to Steps 1 to 3, and connect the winding wires 2 of the three groups of windings to form a three-phase voltage regulator.

[0051] Specifically, the end positions are virtually set, and the winding wire starts to wind at any position on the iron core, and the starting position is the first end position. As Figure 4As shown, the starting end of the winding wire winds around the first end position of the iron core in a preset direction to form the first turn, and winds around the second end position to form the second turn. After winding two turns to form a basis, the third turn winds above the first turn, the fourth turn winds back to the lower layer beside the second turn, the fifth turn winds above the second turn, the sixth turn winds back to the lower layer beside the fourth turn, and so on, winding one above the other to form a double-layer longitudinal winding structure.

[0052] Three double-layer longitudinal winding structures are made in the same way to form three independent single-phase voltage regulating units. Each unit corresponds to one phase of the three-phase power supply, and the three single-phase voltage regulating units are connected by star (Y) or delta (Δ) connection. When working: By synchronously adjusting the output voltages of the three single-phase voltage regulating units, the balanced regulation of the three-phase voltage is realized.

[0053] In this embodiment, the wire diameters of the winding wires of the three groups of windings can be the same or different. According to factors such as the design requirements, performance requirements, and load characteristics of the voltage regulator, the wire diameters of the three groups of windings can be selected and adjusted according to specific situations. If the three groups of windings bear different loads or functions, their current requirements may be different, and different wire diameters can be selected.

[0054] Therefore, for a winding method of an autotransformer, during winding, the first turn and the second turn are placed in the lower layer, the third turn is placed in the upper layer, the fourth turn is placed in the lower layer again, the fifth turn is placed in the upper layer, and so on for winding. By adopting this longitudinal winding method, the voltage between the upper and lower layers is significantly reduced compared with the past, thereby eliminating the installation of the interlayer insulating board and reducing the volume and cost of the winding.

[0055] In this embodiment, each turn of the winding wire is closely attached to each other. Specifically, during the winding process, each turn of the winding wire is closely attached to ensure the integrity and stability of the winding. The closely attached winding wires can reduce the air gap inside the winding, reduce magnetic leakage and losses, use the iron core with the smallest volume under the condition of ensuring the magnetic strength, and improve the efficiency of the voltage regulator.

[0056] In this embodiment, the winding wire is composed of enameled wire. Specifically, the enameled wire has good insulation performance and electrical conductivity, and can meet the working requirements of the voltage regulator.

[0057] In this embodiment, the winding wire is a single enameled wire or a bundle of enameled wires. Specifically, when using a bundle of enameled wires, the cross-sectional area of the winding can be increased, the current-carrying capacity of the winding can be improved, and at the same time, the heat dissipation performance of the winding can also be improved.

[0058] In this embodiment, the iron core is an annular iron core or a cylindrical iron core. Specifically, the annular iron core has advantages such as uniform magnetic circuit and small magnetic leakage, and is suitable for occasions with high requirements for the performance of the voltage regulator; the cylindrical iron core has advantages such as simple structure and mature manufacturing process, and is suitable for general voltage regulator applications. It can be selected according to the specific usage scenario.

[0059] In this embodiment, the end position of the iron core is a groove structure. Specifically, the circumferential surface of the iron core is not smooth, but is set as a groove structure. As Figure 5 shown in the front view of the iron core, several grooves 4 are provided at both ends of the iron core, which is convenient for winding and fixing the position of the winding wire. As Figure 6 shown in the front view of the iron core, several grooves 4 are arranged on the entire circumferential surface, which can increase the contact area between the winding and the iron core, improve the fixing and stability of the winding, and is also beneficial to the heat dissipation of the winding.

[0060] In this embodiment, the preset direction is the same direction, either the clockwise direction or the counterclockwise direction. Specifically, the winding method in the same direction can ensure that the magnetic flux directions of the windings are consistent, improving the performance and reliability of the voltage regulator.

[0061] Embodiment 3

[0062] As Figure 4 shown, a kind of autotransformer prepared according to the above-mentioned winding method of the autotransformer. Adopting the longitudinal cross-layer winding method, it has the following advantages: no interlayer insulation layer, saving a part of materials; reducing the interlayer voltage and improving the product reliability; improving the compactness of the winding wire, reducing the thermal resistance and improving the heat dissipation; improving the utilization rate of the iron core window space, reducing the copper loss and reducing the heat generation; reducing the internal resistance of the winding wire, improving the load-carrying capacity of the voltage regulator; reducing the volume and weight of the voltage regulator, making the voltage regulator small and lightweight.

[0063] It should also be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of additional identical elements in the process, method, article or device including the element.

[0064] The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A winding method for an auto-coupled voltage regulator, characterized in that: It comprises an iron core and a winding wire, wherein the winding wire is wound along the axial direction of the iron core; the iron core is provided with a plurality of end positions at equal intervals on a circumferential surface; Step 1: The starting end of the winding wire is wound along a preset direction at a first end of the iron core to form a first circle, and is wound along a preset direction at a second end to form a second circle; Step 2: Winding along a preset direction above the first circle to form a third circle, and winding along a preset direction at the third end to form a fourth circle; Step 3: Repeat step 2 in order, winding along the preset direction above the nth circle to form the n+2th circle, and winding along the preset direction at the n+2 end to form the n+3th circle, n≥1, until the winding at the end is completed.

2. The winding method of the auto-coupled voltage regulator according to claim 1, characterized in that: Each circle of the winding wires is tightly fitted to each other.

3. The winding method of the auto-coupled voltage regulator according to claim 1, characterized in that: The winding wire is composed of enameled wire.

4. The winding method of the auto-coupled voltage regulator according to claim 3, characterized in that: The winding wire is a single enameled wire or a bundle of enameled wires.

5. The winding method of the auto-coupled voltage regulator according to claim 1, characterized in that: The iron core is an annular iron core or a cylindrical iron core.

6. The winding method of the auto-coupling voltage regulator according to claim 5, characterized in that: The end of the iron core is a groove structure.

7. The winding method of the auto-coupled voltage regulator according to claim 1, characterized in that: The preset direction is the same direction, clockwise or counterclockwise.

8. The winding method of the auto-coupled voltage regulator according to claim 1, characterized in that: Step 4: Make three sets of windings according to steps 1 to 3, and connect the winding wires of the three sets of windings to form a three-phase voltage regulator.

9. The winding method of the auto-coupled voltage regulator according to claim 8, characterized in that: The wire diameters of the winding wires of the three winding groups may be the same or different.

10. An auto-coupled voltage regulator prepared by the winding method of the auto-coupled voltage regulator according to any one of claims 1 to 9.

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