Transformer winding structure with minimum leakage inductance

Abstract

The utility model provides a transformer winding structure with minimum leakage inductance. The transformer winding structure comprises a transformer winding, a stator core; the stator winding is arranged on the stator iron core, and a magnetic circuit is formed between the stator winding and the stator iron core; a rotor core engaged with the stator core; the rotor winding is arranged on the rotor iron core, and a magnetic circuit is formed between the rotor winding and the rotor iron core; the magnetic conduction element is arranged between the stator iron core and the rotor iron core and is used for reducing magnetic resistance; the cooling channel is arranged in the magnetic conductive element and is used for cooling the magnetic conductive element and the winding; the supporting structure is used for supporting all parts and ensuring the structural stability; and the insulating part is used for isolating all parts to ensure electrical safety. The magnetic conduction element is made of a non-magnetic material, the cooling channel is of a spiral or net structure, and a cooling liquid flowing channel is arranged in the cooling channel and used for guiding cooling liquid to flow. The transformer winding structure with the minimum leakage inductance can effectively reduce the leakage flux and improve the magnetic flux efficiency, so that the loss of the transformer is reduced, and the energy efficiency ratio is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of power transformers, and more specifically, to a transformer winding structure with minimum leakage inductance. Background Art

[0002] As a key device in the power system, the performance of a transformer is directly related to the efficiency and safety of power transmission. However, traditional transformers have a large leakage magnetic flux problem during operation, which not only leads to energy waste, but also may cause a series of faults such as overheating and vibration. In severe cases, it may even cause equipment damage and pose a threat to the stability of the power grid. The leakage magnetic flux phenomenon is mainly caused by the fact that the magnetic flux inside the transformer core cannot completely pass through the main magnetic path, but partially escapes through air or other non-magnetic materials. This leakage magnetic flux not only reduces the efficiency of the transformer, but also the magnetic field generated by the leakage magnetic flux may interfere with the normal operation of surrounding equipment, causing electromagnetic interference. In addition, the leakage magnetic flux will also cause local overheating of the transformer, accelerate the aging of insulating materials, and shorten the service life of the transformer.

[0003] In the prior art, during the use of power transformers, the phenomenon of leakage magnetic flux is likely to occur, resulting in local overheating and affecting the operation of the device. Therefore, we make improvements and propose a transformer winding structure with minimum leakage inductance. Summary of the Utility Model

[0004] The purpose of the present utility model is to solve the problem that during the use of current power transformers, the phenomenon of leakage magnetic flux is likely to occur, resulting in local overheating and affecting the operation of the device.

[0005] In order to achieve the above-mentioned utility model purpose, the present utility model provides the following technical solutions:

[0006] A transformer winding structure with minimum leakage inductance to improve the above problems.

[0007] Specifically, this application is as follows:

[0008] A transformer winding structure with minimum leakage inductance, comprising:

[0009] A transformer winding;

[0010] A stator core;

[0011] A stator winding, arranged on the stator core and forming a magnetic path with the stator core;

[0012] A rotor core, meshing with the stator core;

[0013] A rotor winding, arranged on the rotor core and forming a magnetic path with the rotor core;

[0014] A magnetic conductive element is arranged between the stator core and the rotor core and is used to reduce the magnetic resistance;

[0015] A cooling channel is arranged in the magnetic conductive element and is used to cool the magnetic conductive element and the winding;

[0016] A support structure is used to support each component to ensure the structural stability;

[0017] An insulating part is used to isolate each component to ensure the electrical safety.

[0018] As a preferred technical solution of the present application, the magnetic conductive element is made of a non-magnetic material, the cooling channel is in a spiral or reticular structure, and a coolant flow channel is arranged in the cooling channel for guiding the flow of the coolant.

[0019] As a preferred technical solution of the present application, the insulating part is made of epoxy resin, silicone rubber or other materials with good insulation performance.

[0020] As a preferred technical solution of the present application, the support structure is made of a metal material.

[0021] As a preferred technical solution of the present application, the stator winding and the rotor winding adopt a multi-layer winding method to improve the electromagnetic performance, and the stator core and the rotor core are connected by a yoke to enhance the mechanical strength.

[0022] As a preferred technical solution of the present application, the surface of the magnetic conductive element is provided with a micro-structure to reduce the air resistance and improve the magnetic conduction effect.

[0023] As a preferred technical solution of the present application, a coolant collection device is arranged at the outlet of the cooling channel for collecting the coolant and recycling it.

[0024] As a preferred technical solution of the present application, multiple groups of supports are arranged at both ends of the stator core and the rotor core, a tooth block and an elastic member are arranged at the outer end of each group of supports, and a tooth groove is arranged at the outer end of the tooth block.

[0025] Compared with the prior art, the beneficial effects of the present utility model are:

[0026] In the solution of the present application:

[0027] The transformer winding structure with the minimum leakage inductance of the present utility model can effectively reduce the leakage magnetic flux, improve the magnetic flux efficiency, thereby reducing the loss of the transformer and improving the energy efficiency ratio. Description of the Drawings

[0028] Figure 1 It is a schematic diagram of the overall structure of the transformer winding structure with the minimum leakage inductance provided by the present application;

[0029] Figure 2The overall side sectional view structure of the transformer winding structure with the minimum leakage inductance provided by this application;

[0030] Figure 3 The transformer winding structure with the minimum leakage inductance provided by this application Figure 2 The enlarged structure schematic diagram of A in it.

[0031] The markings in the figure:

[0032] 1. Transformer winding; 2. Stator core; 3. Stator winding; 4. Rotor core; 5. Rotor winding; 6. Magnetic conduction element; 7. Cooling channel; 8. Support structure; 9. Support body; 10. Tooth groove; 11. Tooth block; 12. Elastic member. Specific implementation manners

[0033] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Apparently, the described embodiments are some but not all of the embodiments of the present utility model.

[0034] Therefore, the following detailed description of the embodiments of the present utility model is not intended to limit the scope of the present utility model to be protected, but merely represents some embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts fall within the scope of protection of the present utility model. It should be noted that, without conflict, the embodiments in the present utility model and the features and technical solutions in the embodiments may be combined with each other.

[0035] It should be noted that: Similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0036] As Figure 1 shown, this embodiment proposes a transformer winding structure with the minimum leakage inductance, including:

[0037] Transformer winding 1;

[0038] Stator core 2;

[0039] Stator winding 3, arranged on the stator core 2 and forming a magnetic circuit with the stator core 2;

[0040] Rotor core 4, meshing with the stator core 2;

[0041] Rotor winding 5, arranged on the rotor core 4 and forming a magnetic circuit with the rotor core 4;

[0042] The magnetic conductive element 6 is arranged between the stator core 2 and the rotor core 4 to reduce the magnetic resistance;

[0043] The cooling channel 7 is arranged in the magnetic conductive element 6 to cool the magnetic conductive element 6 and the winding;

[0044] The support structure 8 is used to support each component to ensure the structural stability;

[0045] The insulating part is used to isolate each component to ensure the electrical safety.

[0046] The magnetic conductive element 6 is made of non-magnetic material, the cooling channel 7 is in a spiral or mesh structure, and a coolant flow channel is arranged in the cooling channel 7 to guide the flow of the coolant.

[0047] The insulating part is made of epoxy resin, silicone rubber or other materials with good insulation performance.

[0048] The support structure 8 is made of metal material, such as aluminum alloy or stainless steel.

[0049] The stator winding 3 and the rotor winding 5 adopt a multi-layer winding method to improve the electromagnetic performance, and the stator core 2 and the rotor core 4 are connected by a yoke to enhance the mechanical strength.

[0050] The surface of the magnetic conductive element 6 is provided with a micro-structure to reduce the air resistance and improve the magnetic conduction effect.

[0051] A coolant collection device is arranged at the outlet of the cooling channel 7 to collect the coolant and recycle it.

[0052] This transformer winding structure can be applied to fields such as power systems and motor drive systems;

[0053] This transformer winding structure reduces the leakage magnetic flux, reduces the loss of the transformer, improves the energy efficiency ratio, and at the same time has good cooling performance, and can meet the application requirements of high power density and high efficiency;

[0054] This transformer winding structure has the advantages of simple structure, convenient manufacturing and low cost;

[0055] This transformer winding structure can be compatible with the existing transformer structure, which is convenient for popularization and application.

[0056] The stator core 2 and the rotor core 4 are respectively arranged at both ends of the transformer, and they are connected together by a yoke to form the main magnetic circuit of the transformer;

[0057] The stator winding 3 is arranged on the stator core 2, and the rotor winding 5 is arranged on the rotor core 4. They respectively form their own magnetic circuits with the stator core 2 and the rotor core 4;

[0058] The magnetic conductive element 6 is arranged between the stator core 2 and the rotor core 4 to reduce the magnetic resistance and improve the magnetic flux efficiency. A cooling channel 7 is arranged in the magnetic conductive element 6 for cooling the magnetic conductive element 6 and the winding; the cooling channel 7 can be a spiral or mesh structure to dissipate heat more effectively;

[0059] The insulating part is used to isolate each component to ensure electrical safety. It can be made of materials with good insulation performance such as epoxy resin and silicone rubber.

[0060] Multiple groups of support bodies 9 are arranged at both ends of the stator core 2 and the rotor core 4. A tooth block 11 and an elastic part 12 are arranged at the outer end of each group of support bodies 9, and a tooth groove 10 is arranged at the outer end of the tooth block 11.

[0061] After the winding is completed, by adjusting multiple groups of support bodies 9 at both ends of the stator core 2 and the rotor core 4, and through the mutual engagement of the corresponding tooth groove 10 notch and the tooth block 11, it is convenient to position the end face of the winding structure, so that the internal magnetic field of the transformer winding structure is stable and there is no magnetic leakage phenomenon.

[0062] In the actual application of this application, the transformer winding structure with the minimum leakage inductance of the present utility model can be adjusted and optimized as needed. For example, appropriate materials and structural forms can be selected according to specific usage scenarios and requirements. In addition, this transformer winding structure can also be compatible with the existing transformer structure, which is convenient for popularization and application. By adopting the above structure and materials, the transformer winding structure with the minimum leakage inductance of the present utility model can effectively reduce magnetic leakage, improve the magnetic flux efficiency, thereby reducing the loss of the transformer and improving the energy efficiency ratio. At the same time, this transformer winding structure also has good cooling performance and can meet the application requirements of high power density and high efficiency. In addition, this transformer winding structure also has the advantages of simple structure, convenient manufacturing and low cost, which is conducive to wide application in the fields of power systems, motor drive systems, etc.

[0063] The above embodiments are only used to illustrate the present utility model and do not limit the technical solutions described in the present utility model. Although this specification has described the present utility model in detail with reference to the above embodiments, the present utility model is not limited to the above specific implementation manners. Therefore, any modification or equivalent replacement to the present utility model; and all technical solutions and their improvements that do not depart from the spirit and scope of the utility model are covered by the scope of the claims of the present utility model.

Claims

1. A transformer winding structure with minimum leakage inductance, characterized in that: include: Transformer winding (1); stator core (2); A stator winding (3) is arranged on the stator core (2) and forms a magnetic circuit with the stator core (2); The rotor core (4) is meshed with the stator core (2); A rotor winding (5) is arranged on the rotor core (4) and forms a magnetic circuit with the rotor core (4); A magnetic conductive element (6) is arranged between the stator core (2) and the rotor core (4) and is used to reduce magnetic resistance; A cooling channel (7) is arranged in the magnetic conductive element (6) and is used for cooling the magnetic conductive element (6) and the winding; A supporting structure (8) for supporting various components; Insulation parts are used to isolate various components.

2. A transformer winding structure with minimum leakage inductance according to claim 1, characterized in that: The magnetic conductive element (6) is made of non-magnetic material, the cooling channel (7) is a spiral or mesh structure, and a cooling liquid flow channel is provided in the cooling channel (7) for guiding the flow of the cooling liquid.

3. The transformer winding structure with minimum leakage inductance according to claim 2, characterized in that: The insulating member is made of epoxy resin, silicone rubber or other materials with good insulating properties.

4. The transformer winding structure with minimum leakage inductance according to claim 3, characterized in that: The supporting structure (8) is made of metal material.

5. The transformer winding structure with minimum leakage inductance according to claim 4, characterized in that: The stator winding (3) and the rotor winding (5) are wound in multiple layers, and the stator core (2) and the rotor core (4) are connected via a yoke.

6. The transformer winding structure with minimum leakage inductance according to claim 5, characterized in that: The surface of the magnetic conductive element (6) is provided with a microstructure for reducing air resistance and improving the magnetic conductive effect.

7. The transformer winding structure with minimum leakage inductance according to claim 6, characterized in that: A cooling liquid collecting device is provided at the outlet of the cooling channel (7) for collecting the cooling liquid and recycling it.

8. The transformer winding structure with minimum leakage inductance according to claim 7, characterized in that: Multiple groups of support bodies (9) are provided at both ends of the stator core (2) and the rotor core (4), and the outer end of each group of support bodies (9) is provided with a tooth block (11) and an elastic member (12), and the outer end of the tooth block (11) is provided with a tooth groove (10).

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