Resistance voltage dividing type mutual inductor

Abstract

The utility model discloses a resistance voltage dividing type mutual inductor which comprises a bottom cabinet, and a mutual inductor body is arranged above the bottom cabinet. The top end of the mutual inductor body is provided with a grading ring, and a plug is arranged above the grading ring; a plurality of radiating fins are arranged on the outer side of the mutual inductor body, and a resistance voltage divider is arranged at the lower end of the mutual inductor body. The heat dissipation fins are arranged on the outer side of the mutual inductor body at equal intervals, the heat dissipation area is effectively increased, the heat dissipation fins are combined with the heat dissipation fan installed on the side wall of the bottom cabinet, an active heat dissipation system is formed, the heat dissipation speed is greatly increased, and the measurement accuracy is improved; the design of the condensation pipe is introduced, the upper end of the condensation pipe penetrates through the plug and extends outwards, the lower end of the condensation pipe is connected to the winding in the bottom cabinet, a closed-loop cooling system is formed, and the design is beneficial to reducing the temperature of the mutual inductor body; the technical problem of heat dissipation of the resistance voltage division type mutual inductor is effectively solved, and the stability and the measurement precision of equipment are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of voltage-dividing transformers, in particular to a resistance voltage-dividing transformer. Background Art

[0002] As the power system accelerates its transformation toward information-based, automated, and interactive intelligent systems, the construction of smart grids has become an industry consensus. In this context, ensuring the safe and economical operation of the power system requires accurate measurement of various parameters of power equipment, thereby providing solid data support for metering, monitoring, and protection. As a key device in the field of high-voltage measurement, the role of the resistance-divider electronic transformer in the power system is becoming increasingly prominent. This type of transformer uses the principle of resistance-divider voltage to convert the voltage value on a high-voltage power supply or transmission line into a measurable low-voltage signal. Specifically, its design principle is to connect a resistor of a specific resistance value in series with the high-voltage circuit being measured, and the two ends of the resistor are connected to a precision electronic circuit. By utilizing the basic relationship between resistance, current, and voltage, accurate conversion from high voltage to low voltage is achieved, thereby performing high-precision voltage measurements.

[0003] However, existing resistive voltage divider electronic transformers have significant shortcomings in their heat dissipation design. Traditional heat dissipation methods rely primarily on heat sinks mounted on the transformer's surface. However, these heat sinks typically rely on natural convection to dissipate heat, resulting in inefficient heat dissipation. This causes the transformer's temperature to rise too quickly during operation, severely impacting measurement accuracy and stability, and ultimately reducing overall operating efficiency.

[0004] In summary, in view of the limitations of existing technologies, it is urgent to develop a new type of resistive voltage divider transformer with a more efficient heat dissipation mechanism to ensure high measurement accuracy and long-term stable operation of the equipment. Summary of the Invention

[0005] The purpose of the present utility model is to provide a resistance voltage divider type mutual inductor to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a resistance voltage divider type transformer, comprising a base cabinet, wherein a transformer body is provided above the base cabinet; a voltage equalizing ring is installed at the top of the transformer body, wherein a plug is provided above the voltage equalizing ring; a plurality of heat dissipation fins are provided on the outside of the transformer body, wherein the heat dissipation fins are arranged at equal distances from top to bottom along the circumference of the transformer body; a resistance voltage divider is provided at the lower end of the transformer body, wherein a protective cover is provided on the outside of the resistance voltage divider.

[0007] Preferably, a winding is provided in the inner cavity of the base cabinet, wherein a safety door is provided at the front end of the base cabinet; a junction box is provided on the safety door, wherein connection terminals are provided in the junction box.

[0008] Preferably, a connector is provided at the output end of the winding, wherein the connector extends into the junction box and is connected to the connection terminal.

[0009] Preferably, a condenser is provided inside the transformer body, wherein the upper end of the condenser passes through the plug and extends outward.

[0010] Preferably, the lower end of the condenser pipe passes through the base cabinet and extends into the inner cavity of the base cabinet, wherein the lower end of the condenser pipe is connected to the winding through a connector.

[0011] Preferably, a mounting hole is provided at the side wall of the base cabinet, wherein a cooling fan is provided in the mounting hole, and a filter is provided at the air outlet of the cooling fan.

[0012] Compared with the prior art, the present invention has the following beneficial effects: the present invention effectively increases the heat dissipation area by equidistantly arranging the heat dissipation fins on the outside of the transformer body, and forms an active heat dissipation system in combination with the heat dissipation fan installed on the side wall of the bottom cabinet, which greatly speeds up the heat dissipation speed, solves the problem of low efficiency of traditional heat dissipation methods, ensures the stable operation of the transformer in a high temperature environment, and improves the measurement accuracy; introduces a condenser design, which extends outward through the plug at the upper end of the condenser and is connected to the winding in the bottom cabinet at the lower end, forming a closed-loop cooling system, which not only helps to further reduce the temperature of the transformer body, but also can locally cool the winding and other key components to prevent overheating. The safety door and junction box at the front of the base cabinet ensure the safety of operators and facilitate wiring and maintenance. The design of the wiring terminals and connectors in the junction box makes the circuit connection more reliable and easy to inspect and replace. While ensuring efficient heat dissipation, the entire design also focuses on structural compactness and functional integration. The resistor divider is cleverly set at the lower end of the transformer body and is equipped with a protective cover, which not only protects the divider from external interference but also maintains the overall appearance and stability. It effectively solves the technical difficulties in heat dissipation of the resistor divider transformer, improves the stability and measurement accuracy of the equipment, and provides more reliable technical support for the construction and operation of smart grids. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural diagram of the utility model;

[0014] Figure 2 It is a schematic diagram of the internal structure of the utility model;

[0015] Figure 3 This is a schematic diagram of the structure of the connection between the condenser and the winding of the utility model;

[0016] Figure 4 It is a structural diagram of the transformer body of the utility model.

[0017] Among them: 1. Base cabinet; 2. Transformer body; 3. Grading ring; 4. Plug; 5. Heat dissipation fins; 6. Resistor divider; 7. Protective cover; 8. Winding; 9. Safety door; 10. Junction box; 11. Terminal block; 12. Connector; 13. Condenser; 14. Connector; 15. Cooling fan; 16. Filter. DETAILED DESCRIPTION

[0018] The present invention will be described in further detail below with reference to the accompanying drawings.

[0019] Please refer to Figures 1 to 4 To achieve the above objectives, the present invention provides the following technical solutions:

[0020] A resistance voltage divider type transformer includes a base cabinet 1, wherein a transformer body 2 is provided above the base cabinet 1; a grading ring 3 is installed on the top of the transformer body 2, wherein a plug 4 is provided above the grading ring 3; a plurality of heat dissipation fins 5 are provided on the outside of the transformer body 2, wherein the heat dissipation fins 5 are arranged equidistantly from top to bottom along the circumference of the transformer body 2; a resistance voltage divider 6 is provided at the lower end of the transformer body 2, wherein the resistance voltage divider 6 is electrically connected to the transformer body 2; a protective cover 7 is provided on the outside of the resistance voltage divider 6, wherein the protective cover 7 is fixedly connected to the upper end of the base cabinet 1.

[0021] In the above scheme, the base cabinet 1 serves as the supporting structure of the entire transformer. The base cabinet 1 not only provides a solid foundation, but also integrates key electrical components inside the base cabinet 1. The design of the base cabinet 1 usually takes into account electromagnetic compatibility and safety protection requirements; the transformer body 2 is located above the base cabinet 1 and is the core part of the transformer. It is responsible for converting high-voltage signals into low-voltage signals. The design of the transformer body 2 must ensure stability and safety in high-voltage environments; the grading ring 3 is installed on the top of the transformer body 2 to evenly distribute the high-voltage electric field, prevent partial discharge and electric field distortion, and thus improve the measurement accuracy and reliability of the transformer; the plug 4 is located above the grading ring 3 and plays a role in The function of sealing and protection is to prevent external debris from entering the interior of the transformer, and it also helps to keep the interior of the transformer clean and dry; the heat dissipation fins 5 are arranged equidistantly from top to bottom along the circumference of the transformer body 2. The heat dissipation fins 5 effectively improve the heat dissipation efficiency of the transformer body 2 by increasing the heat dissipation area, ensuring stable operation even in high temperature environments; the resistor divider 6 is located at the lower end of the transformer body 2 and is a key component for the transformer to achieve voltage conversion. The resistor divider 6 divides the high-voltage signal into a low-voltage signal through a precisely designed resistor network for subsequent circuit processing; the protective cover 7 covers the outside of the resistor divider 6 to play a role of protection and isolation to prevent external interference and damage.

[0022] When a high-voltage signal is applied to the transformer body 2, the grading ring 3 ensures a uniform distribution of the electric field. The high-voltage signal is then converted into a low-voltage signal through the insulating medium and the resistor divider 6 within the transformer body 2. This low-voltage signal is then transmitted to the subsequent circuit for processing and measurement. The transformer generates a certain amount of heat during operation. To maintain the operating temperature within a reasonable range, the heat dissipation fins 5 dissipate the heat to the surrounding environment through natural convection and radiation. The windings 8 and other electrical components in the base cabinet 1 are connected to the external circuit through the junction box 10. The terminal blocks 11 in the junction box 10 provide a reliable electrical connection point and ensure the safety of the operator. At the same time, components such as the protective cover 7 and the plug 4 also play a role in preventing external interference and damage. The resistor divider transformer achieves efficient, stable, and safe voltage measurement and heat dissipation functions through careful structural design and optimization of the working principle. At the same time, it also provides convenient maintenance and operation methods, ensuring the long-term stable operation of the transformer.

[0023] Please refer to Figures 1 to 3 As an embodiment of the present utility model, a winding 8 is provided in the inner cavity of the base cabinet 1, wherein a safety door 9 is opened at the front end of the base cabinet 1; a junction box 10 is provided on the safety door 9, wherein a terminal 11 is provided in the junction box 10; a coupler 12 is provided at the output end of the winding 8, wherein the coupler 12 extends into the junction box 10 and is connected to the terminal 11.

[0024] In the above-mentioned scheme, a special space is designed inside the base cabinet 1 for installing the winding 8. The base cabinet 1 is usually made of insulating material to ensure electrical isolation between the winding 8 and the external environment. The winding 8 is a key electrical component in the transformer and is usually wound with multiple layers of insulated wire. The function of the winding 8 is to convert the high-voltage signal received by the transformer body 2 into a low-voltage signal while maintaining stable electrical performance. The number of turns and wire diameter of the winding 8 and other parameters are accurately calculated according to the design requirements and measurement range of the transformer. The safety door 9 is located at the front end of the base cabinet 1 to protect the electrical components in the base cabinet 1 from interference and damage from the external environment. The safety door 9 is usually made of sturdy metal material and is equipped with a lock to ensure its safety. When maintenance or inspection is required, the operator can access the components inside the base cabinet 1 by opening the safety door 9. The junction box 10 is located on the safety door 9 and is a device specially used for electrical connection. The terminal block 10 is designed with a terminal block 11 inside for connecting the output end of the winding 8 with the external circuit. The design of the terminal block 10 takes into account the needs of electrical safety, easy connection and easy maintenance; the coupler 12 is an electrical connection device at the output end of the winding 8, which is used to transmit the low-voltage signal of the winding 8 to the terminal block 11 in the terminal block 10. The coupler 12 usually adopts a reliable electrical connection method, such as a bolt connection or a plug-in connection, to ensure the stability and reliability of the electrical connection; the terminal block 11 is an electrical connection point in the terminal block 10, which is used to connect the low-voltage signal transmitted by the coupler 12 with the external circuit; the terminal block 11 usually adopts a design that is easy to connect and disassemble, such as a screw terminal or a spring terminal, so that the operator can make electrical connections and inspections.

[0025] When a high-voltage signal is applied to the transformer body 2, the signal is transmitted to the winding 8 through the insulating medium and internal structure of the transformer body 2. After receiving the high-voltage signal, the winding 8 converts the high-voltage signal into a low-voltage signal based on its winding method, number of turns and other parameters. The converted low-voltage signal is transmitted to the terminal 11 in the junction box 10 through the connector 12. The operator connects the low-voltage signal to the external circuit through the terminal 11 in the junction box 10 to perform subsequent measurement, monitoring or protection operations.

[0026] Please refer to Figure 2 、 Figure 3 As an embodiment of the present utility model, a condenser 13 is provided inside the transformer body 2, wherein the upper end of the condenser 13 passes through the plug 4 and extends outward; the lower end of the condenser 13 passes through the base cabinet 1 and extends into the inner cavity of the base cabinet 1, wherein the lower end of the condenser 13 is connected to the winding 8 through a connector 14.

[0027] In the above scheme, the condenser 13 is an important component inside the transformer body 2, wherein the condenser 13 is usually made of a high thermal conductivity material, such as copper or aluminum, to ensure efficient heat transfer; the design of the condenser 13 takes into account the temperature distribution and heat dissipation requirements inside the transformer to ensure that a stable temperature can be maintained even in a high temperature environment; the condenser 13 is arranged along a specific path inside the transformer body 2, and its upper end passes through the plug 4 and extends outward to be connected to an external radiator; the lower end of the condenser 13 passes through the base cabinet 1 and extends into the inner cavity of the base cabinet 1, and is tightly connected to the winding 8 through the connector 14. This layout ensures that the heat generated by the winding 8 can be quickly transferred out through the condenser 13; when the transformer is working, the winding 8 will generate a A certain amount of heat is transferred to the condenser 13 through the connector 14. The condenser 13 uses its high thermal conductivity to quickly transfer the heat from the winding 8 area to its external surface; the outer surface of the condenser 13 exchanges heat with the air inside the transformer body 2 or the outside, and through natural convection or forced convection, the condenser 13 dissipates heat to the surrounding environment, thereby reducing the temperature inside the transformer body 2; the design and working principle of the condenser 13 jointly realize the effective control of the internal temperature of the transformer body 2. By adjusting the length, diameter and layout of the condenser 13, as well as the performance of the external cooling system, it can be ensured that the transformer can maintain a stable temperature even in a high temperature environment, thereby protecting the winding 8 and other electrical components from overheating damage.

[0028] See also Figure 1 As an embodiment of the present invention, a mounting hole is provided at the side wall of the base cabinet 1 , wherein a cooling fan 15 is provided in the mounting hole, and a filter 16 is provided at the air outlet of the cooling fan 15 .

[0029] In the above-described scheme, the mounting hole on the side wall of the base cabinet 1 is the installation position of the cooling fan 15. The mounting hole is usually precisely designed according to the size and shape of the cooling fan 15 to ensure that the cooling fan 15 can be firmly installed on the base cabinet 1 and effectively dissipate heat. The cooling fan 15 is an important component of the internal heat dissipation system of the base cabinet 1. The cooling fan 15 usually adopts a high-speed, low-noise design to ensure that while providing sufficient heat dissipation capacity, it will not cause excessive noise interference to the surrounding environment. The cooling fan 15 sucks in the hot air inside the base cabinet 1 and discharges it to the external environment, thereby reducing the temperature inside the base cabinet 1. The air outlet of the cooling fan 15 is provided with a filter 16, whose main function is to prevent external dust and debris from entering the base cabinet 1 and damaging electrical components. The filter 16 is usually made of fine mesh material, which can effectively block the entry of dust and debris while ensuring smooth air circulation.

[0030] When the mutual inductor is working, the electrical components inside the base cabinet 1 will generate a certain amount of heat. In order to keep the temperature inside the base cabinet 1 stable, the cooling fan 15 starts to work. The cooling fan 15 sucks the hot air inside the base cabinet 1 and filters out the dust and debris therein through the filter 16, and then discharges the clean air into the external environment. In this way, the heat inside the base cabinet 1 is effectively taken away, thereby maintaining a stable temperature. The filter 16 plays a vital role in the operation of the cooling fan 15. It not only prevents dust and debris from entering the base cabinet 1, but also extends the service life of the cooling fan 15 and reduces failures and maintenance costs caused by dust accumulation. At the same time, the filter 16 can also keep the inside of the base cabinet 1 clean and tidy, improve the overall performance and reliability of the mutual inductor, and ensure the long-term stable operation and overall performance improvement of the mutual inductor.

[0031] Although specific embodiments of the present invention have been described above, those skilled in the art will appreciate that these are merely illustrative and that the scope of protection of the present invention is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, and such changes and modifications are intended to fall within the scope of protection of the present invention.

Claims

1. A resistance-divider type transformer, comprising a base cabinet (1), wherein a transformer body (2) is provided above the base cabinet (1); characterized in that: A voltage-equalizing ring (3) is installed at the top of the transformer body (2), wherein a plug (4) is provided above the voltage-equalizing ring (3); a plurality of heat dissipation fins (5) are provided on the outside of the transformer body (2), wherein the heat dissipation fins (5) are arranged at equal intervals from top to bottom along the circumference of the transformer body (2); a resistor divider (6) is provided at the lower end of the transformer body (2), wherein a protective cover (7) is provided on the outside of the resistor divider (6).

2. A resistance voltage divider type mutual inductor according to claim 1, characterized in that: The inner cavity of the base cabinet (1) is provided with a winding (8), wherein a safety door (9) is opened at the front end of the base cabinet (1); a junction box (10) is provided on the safety door (9), wherein a connection terminal (11) is provided in the junction box (10).

3. A resistance voltage divider type mutual inductor according to claim 2, characterized in that: The output end of the winding (8) is provided with a connector (12), wherein the connector (12) extends into the junction box (10) and is connected to the connection terminal (11).

4. The resistance voltage divider type mutual inductor according to claim 1, characterized in that: A condenser tube (13) is provided inside the mutual inductor body (2), wherein the upper end of the condenser tube (13) passes through the plug (4) and extends outward.

5. A resistance voltage divider type mutual inductor according to claim 4, characterized in that: The lower end of the condenser pipe (13) passes through the base cabinet (1) and extends into the inner cavity of the base cabinet (1), wherein the lower end of the condenser pipe (13) is connected to the winding (8) via a connector (14).

6. The resistance voltage divider type mutual inductor according to claim 1, characterized in that: The side wall of the bottom cabinet (1) is provided with a mounting hole, wherein a cooling fan (15) is provided in the mounting hole, and a filter (16) is provided at the air outlet of the cooling fan (15).

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