Low-frequency coupling transformer with monitoring function and manufacturing method thereof

Abstract

The invention belongs to the technical field of coupling transformers, and particularly relates to a low-frequency coupling transformer with a monitoring function and a manufacturing method of the low-frequency coupling transformer. The coupling transformer coil comprises multiple layers of primary coils and multiple layers of coils which are sequentially and coaxially arranged on the outer side of the magnetic core module in a sleeving mode, the secondary coils are located on odd-numbered layers, the primary coils are located on even-numbered layers, and the number of the secondary coils is larger than that of the primary coils; insulation paper is arranged between the primary coil and the secondary coil; monitoring coils are arranged on the secondary coil on the innermost layer and the secondary coil on the outermost layer; the plurality of primary coils are arranged in parallel, the plurality of secondary coils are arranged in parallel, and the two monitoring coils are arranged in parallel.

Description

Technical Field

[0001] The present invention belongs to the technical field of coupling transformers, and in particular relates to a low-frequency coupling transformer with a monitoring function and a manufacturing method thereof. Background Art

[0002] Low-frequency coupling transformer plays a key role in the power system, mainly used for power transmission and voltage conversion. It achieves stable voltage output and regulation through the core and winding structure to ensure the normal operation of electrical equipment.

[0003] The low-frequency coupling transformer has good insulation performance, reduces energy loss and improves energy utilization. However, it also has some disadvantages, such as large size and heavy weight, which makes installation and transportation inconvenient; high energy consumption, which affects the overall energy efficiency to a certain extent; in addition, it is not convenient to monitor voltage and current in some special test situations.

[0004] Nevertheless, low-frequency coupling transformers are still widely used in fields such as electricity, industry and scientific research, and their importance cannot be ignored. Therefore, we propose a low-frequency coupling transformer with monitoring function and its manufacturing method to solve the problem. Summary of the invention

[0005] The object of the present invention is to provide a low-frequency coupling transformer with a monitoring function and a manufacturing method thereof to solve the above-mentioned problem.

[0006] To achieve the above object, the present invention provides the following solutions:

[0007] A low-frequency coupling transformer with a monitoring function comprises a magnetic core module, a coupling transformer coil is sleeved on the magnetic core module, the coupling transformer coil comprises a multi-layer primary coil and a multi-layer secondary coil which are sequentially coaxially sleeved on the outer side of the magnetic core module, the secondary coil is located in an odd-numbered layer, the primary coil is located in an even-numbered layer, and the number of layers of the secondary coil is more than the number of layers of the primary coil; insulating paper is provided between the primary coil and the secondary coil;

[0008] The secondary coil located at the innermost layer and the secondary coil located at the outermost layer are both provided with monitoring coils;

[0009] A plurality of the primary coils are arranged in parallel, a plurality of the secondary coils are arranged in parallel, and two monitoring coils are arranged in parallel.

[0010] Optionally, the monitoring coil and the secondary coil are arranged side by side and are simultaneously wound around the magnetic core module.

[0011] Optionally, the turns ratio of the primary coil to the secondary coil is 2:1.

[0012] Optionally, the magnetic core module includes an EI skeleton, the primary coil, the secondary coil and the monitoring coil are wound on the EI skeleton, and a plurality of EI magnetic cores are fixedly connected to the middle of the EI skeleton.

[0013] Optionally, one ends of a plurality of the primary coils are connected in parallel and electrically connected to a primary port of a transformer, and the other ends of a plurality of the primary coils are connected in parallel and electrically connected to another primary port of the transformer.

[0014] Optionally, one ends of the plurality of secondary coils are connected in parallel and electrically connected to a secondary port of a transformer, and the other ends of the plurality of secondary coils are connected in parallel and electrically connected to another secondary port of the transformer.

[0015] Optionally, one ends of a plurality of the monitoring coils are connected in parallel and electrically connected to a transformer monitoring port, and the other ends of a plurality of the monitoring coils are connected in parallel and electrically connected to another transformer monitoring port.

[0016] A method for manufacturing a low-frequency coupling transformer with a monitoring function, which is used for preparing the above-mentioned low-frequency coupling transformer with a monitoring function, comprises the following steps:

[0017] Prepare the magnetic core module, and sequentially wind a plurality of the secondary coils and a plurality of the primary coils around the outer side of the magnetic core module;

[0018] Connecting a plurality of the secondary coils in parallel, and connecting a plurality of the primary coils in parallel;

[0019] When winding the secondary coils of the first and last layers, the monitoring coil and the secondary coil are arranged side by side and then wound simultaneously on the first or last layer of the magnetic core module;

[0020] The insulating paper is wound between the secondary coil and the primary coil.

[0021] Compared with the prior art, the present invention has the following advantages and technical effects:

[0022] The present invention ensures the insulation withstand voltage performance between the coils by placing interlayer insulating paper between the primary coil, the secondary coil and the monitoring coil, thereby improving the safety and reliability of the transformer. The monitoring coil is built into the transformer, wound in parallel with the secondary coil but independent of the primary coil, so that the transformer can monitor the output signal in real time, improving the monitoring and control capabilities of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative labor:

[0024] Figure 1 It is a schematic diagram of the structure of the present invention;

[0025] Figure 2 For the present invention Figure 1 A partial enlarged view of the middle part;

[0026] Among them, 1. EI skeleton; 2. EI core; 3. Transformer monitoring port; 4. Transformer primary port; 5. Transformer secondary port; 6. Monitoring coil; 7. Secondary coil; 8. Insulation paper; 9. Primary coil. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0029] Reference Figure 1 to Figure 2 The present invention discloses a low-frequency coupling transformer with a monitoring function, including a magnetic core module, a coupling transformer coil is sleeved on the magnetic core module, and the coupling transformer coil includes a multi-layer primary coil 9 and a multi-layer secondary coil 7 which are coaxially sleeved on the outer side of the magnetic core module in sequence, the secondary coil 7 is located in an odd-numbered layer, the primary coil 9 is located in an even-numbered layer, and the number of layers of the secondary coil 7 is more than that of the primary coil 9; an insulating paper 8 is provided between the primary coil 9 and the secondary coil 7;

[0030] The innermost secondary coil 7 and the outermost secondary coil 7 are both provided with a monitoring coil 6;

[0031] A plurality of primary coils 9 are arranged in parallel, a plurality of secondary coils 7 are arranged in parallel, and two monitoring coils 6 are arranged in parallel.

[0032] The present invention ensures the insulation withstand voltage performance between the coils by placing interlayer insulating paper 8 between the primary coil 9, the secondary coil 7 and the monitoring coil 6, thereby improving the safety and reliability of the transformer. The monitoring coil 6 is built into the transformer, wound in parallel with the secondary coil 7 but independent of the primary coil 9, so that the transformer can monitor the output signal in real time, thereby improving the monitoring and control capabilities of the system.

[0033] As an optional implementation, the monitoring coil 6 and the secondary coil 7 are arranged side by side and are wound on the magnetic core module at the same time.

[0034] As an optional implementation, the turns ratio of the primary coil 9 to the secondary coil 7 is 2:1.

[0035] As an optional implementation, the magnetic core module includes an EI skeleton 1 , a primary coil 9 , a secondary coil 7 and a monitoring coil 6 are wound on the EI skeleton 1 , and a plurality of EI magnetic cores 2 are fixedly connected to the middle of the EI skeleton 1 .

[0036] The EI skeleton 1 is a rectangular tubular structure, and the coil is wound on the outer wall of the tubular structure in the middle of the EI skeleton 1.

[0037] The EI core 2 includes two parts, namely an "E-shaped" core and an "I-shaped" core. The middle part of the "E-shaped" core passes through the middle opening of the EI skeleton 1, and the upper and lower ends of the "E-shaped" core respectively cover the outside of the coil. Then the "E-shaped" core and the "I-shaped" core are fixed to complete the fixation of the EI core 2.

[0038] The plane where the EI magnetic core 2 is located is vertically arranged in the space with respect to the coil winding direction.

[0039] As an optional implementation, one ends of the plurality of primary coils 9 are connected in parallel and electrically connected to the primary port 4 of the transformer, and the other ends of the plurality of primary coils 9 are connected in parallel and electrically connected to another primary port 4 of the transformer.

[0040] As an optional implementation, one ends of a plurality of secondary coils 7 are connected in parallel and electrically connected to a transformer secondary port 5 , and the other ends of a plurality of secondary coils 7 are connected in parallel and electrically connected to another transformer secondary port 5 .

[0041] As an optional implementation, one ends of a plurality of monitoring coils 6 are connected in parallel and electrically connected to a transformer monitoring port 3 , and the other ends of a plurality of monitoring coils 6 are connected in parallel and electrically connected to another transformer monitoring port 3 .

[0042] The structure of the present invention is:

[0043] Magnetic core module: includes two EI magnetic cores 2 and one EI skeleton 1, and is used to form a magnetic circuit of a transformer.

[0044] Coupling transformer coil: It is composed of a primary coil 9, a secondary coil 7 and a monitoring coil 6, and the ratio of the number of turns of the primary coil 9 and the secondary coil 7 is 2:1.

[0045] Insulating paper 8: located between the primary coil 9, the secondary coil 7 and the monitoring coil 6 to ensure insulation withstand voltage performance.

[0046] Its coil structure is as follows: the primary coil winding is composed of the primary coils 9 of the 2nd, 4th and 6th layers connected in parallel; the secondary coil winding is composed of the secondary coils 7 of the 1st, 3rd, 5th and 7th layers connected in parallel; the monitoring coil winding is obtained by winding the monitoring coils 6 of the 1st and 7th layers in parallel with the secondary coils 7 of the corresponding layers, and then connecting the two monitoring coils 6 in parallel.

[0047] Insulation paper 8: As the insulating material between layers, it ensures the stability and safety of the transformer under high voltage conditions.

[0048] Compared with the prior art, the present invention has the following effects:

[0049] Enhanced insulation performance: By placing interlayer insulation paper 8 between the primary coil 9, the secondary coil 7 and the monitoring coil 6, the insulation withstand voltage performance between the coils is ensured, thereby improving the safety and reliability of the transformer.

[0050] Optimized coil design: The coil is designed with a turns ratio of 2:1 and a specific layer distribution (primary coil 9 is on the 2nd, 4th and 6th layers, secondary coil 7 is on the 1st, 3rd, 5th and 7th layers, and monitoring coil 6 is wound in parallel with secondary coil 7 on the 1st and 7th layers), achieving efficient energy transmission and signal monitoring.

[0051] Built-in monitoring function: The monitoring coil 6 is built into the transformer, wound in parallel with the secondary winding but independent of the primary winding, so that the transformer can monitor the output signal in real time, improving the monitoring and control capabilities of the system.

[0052] High stability: By using insulating paper 8 as the interlayer insulation material, the stable operation of the transformer under high voltage conditions is guaranteed.

[0053] A method for manufacturing a low-frequency coupling transformer with a monitoring function, which is used for preparing a low-frequency coupling transformer with a monitoring function, comprises the following steps:

[0054] Prepare a magnetic core module, and wind a plurality of secondary coils 7 and a plurality of primary coils 9 in sequence on the outside of the magnetic core module;

[0055] Connecting a plurality of secondary coils 7 in parallel and connecting a plurality of primary coils 9 in parallel;

[0056] When winding the secondary coil 7 of the first layer and the last layer, the monitoring coil 6 and the secondary coil 7 are arranged side by side and wound at the first layer or the last layer of the magnetic core module at the same time;

[0057] Insulation paper 8 is wound between the secondary coil 7 and the primary coil 9 .

[0058] Compared with the existing technology, this method has the following advantages:

[0059] Simplified production process: Through clear preparation steps, winding steps and core bonding steps, the transformer production process is clearer and easier to operate.

[0060] Precise winding control: By specifying the winding sequence and insulation treatment of each layer of coil, the consistency and performance of the coil are ensured.

[0061] Efficient assembly: By bonding the EI core 2 to the two ends of the EI frame 1, a closed magnetic circuit is quickly formed, thereby improving assembly efficiency and the overall performance of the transformer.

[0062] Reliable parallel connection: By connecting the same type of coil ports in parallel, the uniform distribution of current and the coordinated operation of the coils are ensured.

[0063] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply 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 understood as a limitation on the present invention.

[0064] The embodiments described above are only descriptions of the preferred modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A low-frequency coupling transformer with a monitoring function, comprising a magnetic core module, wherein a coupling transformer coil is sleeved on the magnetic core module, characterized in that: The coupling transformer coil comprises a multi-layer primary coil and a multi-layer secondary coil coaxially sleeved on the outside of the magnetic core module in sequence, the secondary coil is located in an odd-numbered layer, the primary coil is located in an even-numbered layer, and the number of layers of the secondary coil is more than the number of layers of the primary coil; insulating paper is provided between the primary coil and the secondary coil; The secondary coil located at the innermost layer and the secondary coil located at the outermost layer are both provided with monitoring coils; A plurality of the primary coils are arranged in parallel, a plurality of the secondary coils are arranged in parallel, and two monitoring coils are arranged in parallel.

2. The low-frequency coupling transformer with monitoring function according to claim 1, characterized in that: The monitoring coil and the secondary coil are arranged side by side and are wound around the magnetic core module at the same time.

3. The low-frequency coupling transformer with monitoring function and the manufacturing method thereof according to claim 1, characterized in that: The turns ratio of the primary coil to the secondary coil is 2:

1.

4. The low-frequency coupling transformer with monitoring function according to claim 2, characterized in that: The magnetic core module comprises an EI skeleton, the primary coil, the secondary coil and the monitoring coil are wound on the EI skeleton, and a plurality of EI magnetic cores are fixedly connected to the middle of the EI skeleton.

5. The low-frequency coupling transformer with monitoring function according to claim 1, characterized in that: One ends of the plurality of primary coils are connected in parallel and electrically connected to a primary port of a transformer, and the other ends of the plurality of primary coils are connected in parallel and electrically connected to another primary port of the transformer.

6. The low-frequency coupling transformer with monitoring function according to claim 1, characterized in that: One ends of the plurality of secondary coils are connected in parallel and electrically connected to a secondary port of a transformer, and the other ends of the plurality of secondary coils are connected in parallel and electrically connected to another secondary port of the transformer.

7. The low-frequency coupling transformer with monitoring function according to claim 1, characterized in that: One ends of a plurality of the monitoring coils are connected in parallel and electrically connected to a transformer monitoring port, and the other ends of a plurality of the monitoring coils are connected in parallel and electrically connected to another transformer monitoring port.

8. A method for manufacturing a low-frequency coupling transformer with a monitoring function, used for preparing a low-frequency coupling transformer with a monitoring function as claimed in any one of claims 1 to 7, characterized in that: The steps include: Prepare the magnetic core module, and sequentially wind a plurality of the secondary coils and a plurality of the primary coils around the outer side of the magnetic core module; Connecting a plurality of the secondary coils in parallel, and connecting a plurality of the primary coils in parallel; When winding the secondary coils of the first and last layers, the monitoring coil and the secondary coil are arranged side by side and then wound simultaneously on the first or last layer of the magnetic core module; The insulating paper is wound between the secondary coil and the primary coil.

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