Transformer with magnetic core gap adjusting shim

Abstract

The utility model provides a transformer with a magnetic core gap adjusting shim, which comprises a transformer shell, a modularized splicing magnetic core arranged in the transformer shell, the magnetic core gap adjusting shim arranged in the modularized splicing magnetic core, a winding assembly arranged above the transformer shell, a magnetic core protection plate arranged on the outer surface of the modularized splicing magnetic core, and a magnetic core gap adjusting shim arranged in the magnetic core gap adjusting shim. A cable connecting assembly is arranged on the magnetic core protection plate, magnetic circuit magnetic resistance can be changed through modularized splicing magnetic core transmission and magnetic core gap adjusting gaskets, and magnetic field distribution and size are affected. According to the electromagnetic induction principle, induced electromotive force is generated on the secondary winding, and voltage conversion and electric energy output are achieved. During operation, voltage, current and temperature parameters need to be monitored regularly, and the shim can be adjusted to recover if the performance is abnormal. And the power supply is cut off and inspection and maintenance are performed when operation is stopped. According to the transformer, different load voltage requirements are met by reasonably designing the structure and adjusting the magnetic core gap, and efficient and safe conversion and transmission of electric energy are guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of transformers, and more specifically, to a transformer with a core gap adjustment shim. Background Technology

[0002] As a key device in power systems for voltage transformation, power transmission, and distribution, the performance and reliability of transformers directly affect the quality and stability of power supply. Chinese Utility Model Patent Application No. CN201020500733.9 discloses a transformer comprising an oil tank and a transformer body. The transformer body is vertically fixed to the bottom of the oil tank. The oil tank is cylindrical. A screw is located at the bottom of the oil tank. Pads are provided between the upper and lower clamps on the transformer body. A high-efficiency, energy-saving wound core structure is adopted.

[0003] However, existing transformer technology still faces several unresolved issues in practical applications. Regarding the core structure, most current transformers use fixed core structures, making core gap adjustment impossible. Core gap significantly impacts the transformer's electromagnetic performance; a fixed gap is difficult to optimize based on different operating conditions and power demands, leading to higher hysteresis and eddy current losses in certain situations, reducing electromagnetic conversion efficiency and increasing energy consumption. In terms of installation and transportation, existing transformers lack convenient mobility, often requiring substantial manpower and resources for handling and positioning during installation. This is especially true for large transformers, whose weight and size make movement even more difficult due to their fixed structure, increasing installation costs and extending the installation period. Regarding electrical connections, existing transformer wiring lacks effective anti-derailment mechanisms. Therefore, we propose an improvement: a transformer with core gap adjustment shims. Utility Model Content

[0004] The purpose of this utility model is to address the problems raised in the existing background technology. To achieve the above-mentioned purpose, this utility model provides the following technical solution: a transformer with a core gap adjustment shim, comprising a transformer housing, a modular spliced ​​magnetic core disposed within the transformer housing, a core gap adjustment shim disposed within the modular spliced ​​magnetic core, a winding assembly disposed above the transformer housing, a core protective plate disposed on the outer surface of the modular spliced ​​magnetic core, and a cable connection assembly disposed on the core protective plate.

[0005] As a preferred technical solution of this utility model, the winding assembly includes a winding bracket, a winding frame, a winding partition, and a winding sheath.

[0006] As a preferred technical solution of this utility model, a winding frame is provided on the winding support, a winding partition is provided on the winding frame, and a winding sheath is provided above the winding partition.

[0007] As a preferred technical solution of this utility model, a high-voltage insulating terminal is provided above the winding sheath, and an anti-disconnection hole is provided on the high-voltage insulating terminal.

[0008] As a preferred technical solution of this utility model, the cable connection assembly includes a connecting cable, a cable threading groove, and a cable groove frame.

[0009] As a preferred technical solution of this utility model, the connecting cable is fixed by a cable threading groove, which is installed on a cable tray frame.

[0010] As a preferred technical solution of this utility model, an insulating gasket clamp is provided below the magnetic core protection plate, and the insulating gasket clamp is held on both sides of the magnetic core gap adjustment shim.

[0011] As a preferred technical solution of this utility model, a transformer base is provided below the transformer housing, a base beam is provided below the transformer base, and a caster wheel is provided below the base beam.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: The magnetic core gap adjustment shim of this utility model can flexibly adjust the magnetic circuit resistance by changing the thickness and quantity, thereby accurately controlling the key parameters of transformer inductance and magnetic flux. This enables the transformer to achieve precise adjustment of the turns ratio and output voltage according to different usage scenarios and load requirements, greatly improving the versatility and adaptability of the transformer.

[0013] This utility model's modular splicing magnetic core effectively guides the magnetic field, reduces magnetic leakage, and lowers energy loss. Simultaneously, the rational design and layout of the winding components, such as the insulation and isolation functions of the winding separators, reduce interference and losses between windings, improving the transformer's energy conversion efficiency. The winding sheath provides mechanical protection and insulation for the windings, preventing external damage; the insulating gasket clamps enhance the insulation performance at the core gap adjustment shims, effectively preventing leakage and ensuring safe operation.

[0014] The anti-disconnection holes on the high-voltage insulated terminals of this invention ensure the secure connection of external lines, preventing loose wiring from causing poor contact, overheating, or even fire hazards. The cable connection assembly secures and guides the connecting cables, preventing them from shifting and causing electrical faults. The casters under the transformer base facilitate the movement and adjustment of the transformer's installation position, reducing the labor intensity and cost of installation and maintenance. The modular design allows for easy disassembly and replacement of components, enabling rapid location and repair of faults, shortening maintenance time, and improving equipment availability. Attached Figure Description

[0015] Figure 1 This is a structural schematic diagram of the present invention;

[0016] Figure 2 This is a partial structural schematic diagram provided for this utility model;

[0017] Figure 3 This is a partial structural schematic diagram provided for this utility model;

[0018] Figure 4 A schematic diagram of the magnetic core gap adjustment shim structure provided by this utility model;

[0019] Figure 5 A schematic diagram of the modular splicing magnetic core structure provided by this utility model;

[0020] Figure 6 A schematic diagram of the connecting cable structure provided by this utility model;

[0021] Figure 7 A schematic diagram of the cable threading groove structure provided by this utility model.

[0022] The image shows:

[0023] 1. Transformer housing; 2. Modular spliced ​​magnetic core; 3. Magnetic core gap adjustment shim; 4. Winding bracket; 5. Winding frame; 6. Winding partition; 7. Winding sheath; 8. High-voltage insulation terminal; 9. Anti-disconnection hole; 10. Magnetic core protection plate; 11. Connecting cable; 12. Insulating gasket clamp; 13. Cable tray; 14. Cable tray frame; 15. Transformer base; 16. Base beam; 17. Casters. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model.

[0025] Therefore, the following detailed description of the embodiments of this utility model is not intended to limit the scope of the claimed utility model, but merely illustrates some embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model. It should be noted that, in the absence of conflict, the embodiments and features and technical solutions in the embodiments of this utility model can be combined with each other. It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0026] Example 1: A transformer with a core gap adjustment shim includes a transformer housing 1, a modular spliced ​​magnetic core 2 disposed inside the transformer housing 1, a core gap adjustment shim 3 disposed inside the modular spliced ​​magnetic core 2, a winding assembly disposed above the transformer housing 1, a core protective plate 10 disposed on the outer surface of the modular spliced ​​magnetic core 2, and a cable connection assembly disposed on the core protective plate 10. The cable connection assembly includes a connecting cable 11, a cable threading groove 13, and a cable groove frame 14. The connecting cable 11 is fixed through the cable threading groove 13, which is mounted on the cable groove frame 14. An insulating shim clamp 12 is disposed below the core protective plate 10, clamping the core gap adjustment shim 3 on both sides.

[0027] The winding assembly includes a winding bracket 4, a winding frame 5, a winding partition 6, and a winding sheath 7. The winding frame 5 is mounted on the winding bracket 4, the winding partition 6 is mounted on the winding frame 5, and the winding sheath 7 is mounted above the winding partition 6. A high-voltage insulating terminal 8 is mounted above the winding sheath 7, and the high-voltage insulating terminal 8 has an anti-disconnection hole 9.

[0028] A transformer base 15 is provided below the transformer housing 1, a base beam 16 is provided below the transformer base 15, and a caster wheel 17 is provided below the base beam 16.

[0029] Working principle of a transformer with core gap adjustment shims: Magnetic circuit structure and gap adjustment: Modular spliced ​​magnetic core 2 forms a closed magnetic circuit in the transformer housing 1. When current flows through the winding assembly, an alternating magnetic field is generated, which propagates in the modular spliced ​​magnetic core 2.

[0030] The core gap adjustment shims 3 are installed inside the modular spliced ​​core 2. By adjusting their thickness and number, the magnetic reluctance in the magnetic circuit can be changed. Different magnetic reluctances will affect the inductance and magnetic flux parameters of the transformer, thereby meeting different electrical performance requirements, such as adjusting the transformer's turns ratio and output voltage.

[0031] Winding assembly operation: The winding bracket 4 provides a supporting structure for the winding frame 5, on which the windings are wound. When current flows into the windings, according to the principle of electromagnetic induction, the alternating current will generate an alternating magnetic field in the windings, and at the same time, it will also generate an induced magnetic flux in the modular spliced ​​magnetic core 2. The winding partition 6 separates the windings, serving as insulation and isolation to prevent short circuit faults between different windings.

[0032] The winding sheath 7 protects the winding from damage caused by external factors such as mechanical impact, dust, and moisture.

[0033] High-voltage insulated terminal 8 is used to connect to external high-voltage circuits, and anti-disconnection hole 9 ensures the firmness of the wiring and prevents loose wiring from causing poor contact or leakage safety hazards.

[0034] The cable connection assembly operates as follows: The connecting cable 11 is used to connect the transformer to the external circuit, enabling the input and output of electrical energy. The cable tray 13 secures and guides the connecting cable 11, preventing it from shaking or shifting during use and avoiding electrical faults caused by loose cables.

[0035] The cable tray frame 14 provides mounting support for the cable passage 13, allowing it to be stably fixed to the core protection plate 10. Protection and insulation: The core protection plate 10 is installed on the outer surface of the modular spliced ​​core 2, protecting the core and preventing mechanical damage. Insulating gasket clamps 12 are clamped on both sides of the core gap adjusting shim 3, further enhancing the insulation performance at the core gap adjusting shim 3 and preventing leakage.

[0036] Overall Support and Movement: The transformer base 15 provides support for the transformer, enabling it to be stably placed on the ground or other mounting foundation. The base beam 16 increases the structural strength of the transformer base 15, improving the overall stability of the transformer. Casters 17 are located below the base beam 16, facilitating the movement of the transformer and adjustment of its installation position.

[0037] The working process of a transformer with core gap adjustment shims: The modular spliced ​​magnetic core 2 is installed into the transformer housing 1. Core gap adjustment shims 3 are placed inside the modular spliced ​​magnetic core 2. By adjusting the number and thickness of the shims, the expected magnetic circuit reluctance is achieved to meet the specific electrical performance requirements of the transformer.

[0038] The winding bracket 4 is installed above the transformer housing 1. A winding frame 5 is installed on the winding bracket 4, and the winding is wound on the winding frame 5. At the same time, the winding partition 6 and the winding sheath 7 are installed to achieve insulation and protection of the winding. The high-voltage insulating terminal 8 is installed above the winding sheath 7, and it is ensured that the anti-disconnection hole 9 can be firmly connected to the external line.

[0039] Install the cable connection assembly on the magnetic core protection plate 10, fix the connection cable 11 on the cable tray frame 14 through the cable threading groove 13, and then install the magnetic core protection plate 10 onto the outer surface of the modular splicing magnetic core 2.

[0040] Insulating pads 12 are installed on both sides of the magnetic core gap adjustment shim 3 to complete the insulation protection.

[0041] The transformer base 15 is installed below the transformer housing 1, and then the base beam 16 and the caster wheel 17 are installed to facilitate the movement and fixation of the transformer.

[0042] The transformer is connected to the external power supply and load circuit via connecting cable 11, and the high-voltage side line is connected using high-voltage insulated terminal block 8 to ensure that the line connection is firm and well insulated.

[0043] Electrical input and magnetic field generation: When an external power source inputs alternating current into the transformer, the current flows through the windings in the winding assembly. According to Ampere's law, the alternating current generates an alternating magnetic field in the windings. This magnetic field mainly propagates through the magnetic circuit formed by the modular spliced ​​magnetic cores 2. The magnetic core gap adjustment shims 3 affect the magnetic reluctance of the magnetic circuit, thus influencing the distribution and magnitude of the magnetic field.

[0044] Electromagnetic induction and electrical energy conversion: The alternating magnetic field changes within the modular spliced ​​magnetic core 2, inducing an electromotive force in the secondary winding according to Faraday's law of electromagnetic induction. By rationally designing the turns ratio of the windings, voltage transformation can be achieved to meet the voltage requirements of different loads. When the number of turns in the primary winding is greater than that in the secondary winding, the transformer functions as a step-down transformer; conversely, it functions as a step-up transformer.

[0045] The current generated by the induced electromotive force is output to the load through the secondary winding and connecting cable 11, providing power to the load and meeting its normal operating requirements.

[0046] Operation and Maintenance: During transformer operation, it is necessary to regularly monitor various transformer parameters, such as input and output voltage, current, and temperature. Observe whether the connecting cable 11 shows signs of overheating or aging, and check whether the connection of the high-voltage insulation terminal 8 is secure and whether there are any abnormal discharge conditions. Check whether the magnetic core protection plate 10 and winding sheath 7 are damaged and ensure that their protective functions are normal. At the same time, check whether the insulation performance of the insulating gasket clamp 12 is good to prevent leakage.

[0047] Adjustment and Maintenance: If changes in the transformer's performance parameters are detected, such as unstable output voltage, it may be necessary to adjust the core gap adjusting shim 3 to change the magnetic circuit reluctance and restore the transformer's normal performance. If any component damage is found, such as a broken connecting cable 11 or a cracked winding sheath 7, it should be replaced or repaired promptly to ensure the safe and reliable operation of the transformer.

[0048] The above embodiments are only used to illustrate the present utility model and are not intended to limit the technical solutions described in the present utility model. Although the present utility model has been described in detail with reference to the above embodiments, the present utility model is not limited to the specific embodiments described above. Therefore, any modifications or substitutions to the present utility model, and all technical solutions and improvements that do not depart from the spirit and scope of the utility model, are covered within the scope of the claims of the present utility model.

Claims

1. A transformer with a core gap adjustment shim, comprising a transformer housing (1), characterized in that, The transformer housing (1) is provided with a modular spliced ​​magnetic core (2), the modular spliced ​​magnetic core (2) is provided with a magnetic core gap adjustment shim (3), the transformer housing (1) is provided with a winding assembly, the outer surface of the modular spliced ​​magnetic core (2) is provided with a magnetic core protection plate (10), and the magnetic core protection plate (10) is provided with a cable connection assembly.

2. A transformer with a magnetic core gap adjustment shim according to claim 1, characterized in that, The winding assembly includes a winding bracket (4), a winding frame (5), a winding partition (6), and a winding sheath (7).

3. A transformer with a magnetic core gap adjustment shim as defined in claim 2, wherein, The winding bracket (4) is provided with a winding frame (5), the winding frame (5) is provided with a winding partition (6), and a winding sheath (7) is provided above the winding partition (6).

4. A transformer with a magnetic core gap adjustment shim according to claim 3, characterized in that, A high-voltage insulating terminal (8) is provided above the winding sheath (7), and an anti-disconnection hole (9) is provided on the high-voltage insulating terminal (8).

5. A transformer with a magnetic core gap adjustment shim as defined in claim 4, wherein, The cable connection assembly includes a connecting cable (11), a cable threading channel (13), and a cable tray frame (14).

6. A transformer with a magnetic core gap adjustment shim according to claim 5, characterized in that, The connecting cable (11) is fixed by the cable threading groove (13), which is installed on the cable tray frame (14).

7. A transformer with a magnetic core gap adjustment shim as defined in claim 6, wherein, An insulating pad clamp (12) is provided below the magnetic core protection plate (10), and the insulating pad clamp (12) is clamped on both sides of the magnetic core gap adjustment shim (3).

8. A transformer with a magnetic core gap adjustment shim according to claim 7, characterized in that, A transformer base (15) is provided below the transformer housing (1), a base beam (16) is provided below the transformer base (15), and a moving wheel (17) is provided below the base beam (16).

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