Current transformer facilitating heat dissipation

Abstract

The utility model relates to a current transformer technical field, concretely relates to a current transformer convenient for heat dissipation, a current transformer convenient for heat dissipation, including the shell, be provided with the iron core main body, first winding group and second winding group in the shell, the iron core main body is annular, and first winding group and second winding group are respectively wound in the both ends of iron core main body, the shell is hollow annular structure, and the inner ring wall of shell is set up and has the air outlet, the bottom of shell is connected with the wind collecting hood, the top of wind collecting hood is communicated with the inside of shell, and the bottom of wind collecting hood is set up and has the air inlet, and the inner chamber bottom of wind collecting hood still fixedly installs centrifugal compressor, and the output end of centrifugal compressor installs turbine fan blade. The utility model has the beneficial effects: through centrifugal compressor can absorb the air in the bottom and compress and send into annular air channel, and then under the action of air -guide inclined way of airfoil, spouts from the air outlet, thereby forms the good heat dissipation effect to winding group and iron core.

Description

Technical Field

[0001] This utility model relates to the field of current transformer technology, and more specifically, to a current transformer that is easy to dissipate heat. Background Technology

[0002] Instrument transformers, also known as instrument transformers, are a general term for current transformers and voltage transformers. They convert high voltage to low voltage and large current to small current for use in measurement or protection systems. Their main function is to proportionally transform high voltage or large current into standard low voltage (100V) or standard small current (5A or 1A, both referring to rated values) to achieve standardization and miniaturization of measuring instruments, protection equipment, and automatic control equipment. During operation, current transformers generate significant heat inside their housings. Since the internal oil is stagnant, the heat cannot be dissipated quickly enough, requiring an external oil conservator to allow the thermally expanding oil to overflow. However, this method still cannot provide efficient heat dissipation, reducing the reliability of the transformer's operation. Utility Model Content

[0003] The purpose of this invention is to provide a current transformer that facilitates heat dissipation, thereby solving the problems mentioned in the background art.

[0004] To achieve the above objectives, a current transformer with easy heat dissipation is provided, including a housing, and an iron core body, a first winding group and a second winding group are disposed inside the housing. The iron core body is annular, and the first winding group and the second winding group are respectively wound around the two ends of the iron core body.

[0005] The outer shell has a hollow annular structure, and an air outlet is provided on the inner annular wall of the outer shell; an air collecting hood is connected to the bottom of the outer shell, the top of the air collecting hood is connected to the inside of the outer shell, an air inlet is provided at the bottom of the air collecting hood, and a centrifugal compressor is fixedly installed at the bottom of the inner cavity of the air collecting hood, and a turbine fan blade is installed at the output end of the centrifugal compressor.

[0006] A mounting base is provided at the bottom edge of the air collection hood.

[0007] Furthermore, the interior of the outer shell is hollow to form an annular air passage, and the cross-section of the outer shell is designed as a wing-shaped structure.

[0008] Furthermore, the number of coil turns in the first winding group is greater than the number of coil turns in the second winding group, and the first winding group is used to connect to the load end.

[0009] Furthermore, the top of the housing is provided with a wiring port, which is connected to the first winding group and the second winding group respectively.

[0010] Furthermore, a dustproof net is installed at the air inlet.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0012] Outside ambient air is drawn into the air hood and pressurized by the centrifugal compressor. The air is then transported to the annular air duct above and ejected along the airfoil guide vanes to form an airflow. After being ejected through the annular air duct, the airflow is collected and accelerated by the airfoil guide vanes. Based on Bernoulli's principle, as the velocity of an inviscid fluid increases, the total pressure or potential energy of the fluid decreases, thus creating an airflow with a speed and volume much greater than the surrounding air. The pressure difference generated by this high-speed airflow draws in air from the rear and surrounding areas, accelerates and amplifies it to form a stable and powerful airflow. The faster the airflow, the lower the air pressure at the outlet, and the easier it is for internal heat to be transferred to areas of lower pressure, thus creating a good heat dissipation effect. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of the main view of this utility model;

[0014] Figure 2 This is a schematic diagram of the cross-sectional structure of the outer shell in this utility model;

[0015] Figure 3 This is a schematic diagram of the internal structure of the present invention;

[0016] Figure 4 This is a bottom view of the present invention.

[0017] The meanings of the labels in the diagram are as follows:

[0018] 1. Outer casing; 2. Iron core body; 3. First winding group; 4. Second winding group; 5. Air outlet; 6. Air collector cover; 7. Air inlet; 8. Centrifugal compressor; 9. Turbine fan blades; 10. Mounting base; 11. Annular air passage; 12. Wiring port; 13. Dustproof net. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0020] Those skilled in the art will understand that, unless specifically stated otherwise, the singular forms “a,” “an,” and “described” used herein may also include the plural forms. It should be further understood that the word “comprising” as used in this specification means the presence of the described features, integers, steps, operations, elements, and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof.

[0021] Please see Figure 1-4 As shown, a current transformer with convenient heat dissipation is provided, including a housing 1. The housing 1 has a hollow annular structure with annular air channels 11 formed inside. The cross-section of the housing 1 is designed with a wing-like structure to optimize airflow, reduce flow resistance, and improve heat dissipation efficiency. An air outlet 5 is provided on the inner annular wall of the housing 1 for airflow to be ejected and directly cool the internal components.

[0022] The outer casing 1 contains an iron core body 2, a first winding group 3, and a second winding group 4. The iron core body 2 is ring-shaped and made of a high-permeability magnetic material for conducting magnetic flux. The first winding group 3 and the second winding group 4 are wound around the two ends of the iron core body 2, respectively, using insulated copper wire. The number of turns of the coil in the first winding group 3 is greater than that in the second winding group 4. The first winding group 3 is used to connect to the load end to realize current conversion. A wiring port 12 is provided at the top of the outer casing 1, which is connected to the first winding group 3 and the second winding group 4 respectively, facilitating the connection of external circuits.

[0023] A collector hood 6 is connected to the bottom of the outer casing 1. The top of the collector hood 6 communicates with the interior of the outer casing 1, and an air inlet 7 is provided at the bottom of the collector hood 6. A dust filter 13 is installed at the air inlet 7 to filter dust and impurities in the air and prevent blockage of the airflow passage. A centrifugal compressor 8 is fixedly installed at the bottom of the inner cavity of the collector hood 6. A turbine fan blade 9 is installed at the output end of the centrifugal compressor 8 for drawing in and compressing air. A mounting base 10 is provided at the bottom edge of the collector hood 6, which is fixed to the mounting base by bolts or welding to ensure overall stability.

[0024] Work process:

[0025] When the current transformer operates, the internal iron core 2 and winding assembly generate heat due to electromagnetic induction. The centrifugal compressor 8 starts, and ambient air is drawn into the air collector shroud 6 through the inlet 7 and compressed under the action of the centrifugal compressor 8. The compressed air is then conveyed to the upper annular air duct 11 and ejected from the outlet 5 along the airfoil-shaped guide vane, forming a high-speed airflow. After being ejected through the annular air duct 11, the airflow is collected and accelerated by the airfoil-shaped guide vane. Based on Bernoulli's principle, as the velocity of an inviscid fluid increases, the total pressure or potential energy of the fluid decreases, thus creating an airflow with a much higher speed and volume than the surrounding air. The pressure difference generated by this high-speed airflow draws in air from the rear and surrounding areas, accelerating and amplifying it to form a stable and powerful airflow. The faster the airflow, the lower the air pressure at the air outlet 5, and the easier it is for the internal heat to be transferred to the low-pressure area with the airflow, thus forming an efficient and uniform heat dissipation effect on the iron core body 2, the first winding group 3, and the second winding group 4.

[0026] Combining the above heat dissipation structure, this utility model uses active air cooling and airflow optimization design to provide multiple heat dissipation for the main heat-generating iron core body 2 and winding group, which significantly improves heat dissipation performance and ensures the reliability and stability of the current transformer under long-term operation.

[0027] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A current transformer with easy heat dissipation, comprising a housing (1), characterized in that: The outer shell (1) is provided with an iron core body (2), a first winding group (3) and a second winding group (4). The iron core body (2) is ring-shaped, and the first winding group (3) and the second winding group (4) are respectively wound around the two ends of the iron core body (2). The outer shell (1) has a hollow ring structure, and an air outlet (5) is provided on the inner ring wall of the outer shell (1); the bottom of the outer shell (1) is connected to an air collecting hood (6), the top of the air collecting hood (6) is connected to the interior of the outer shell (1), the bottom of the air collecting hood (6) is provided with an air inlet (7), and a centrifugal compressor (8) is also fixedly installed at the bottom of the inner cavity of the air collecting hood (6), and a turbine fan blade (9) is installed at the output end of the centrifugal compressor (8). The bottom edge of the air collecting hood (6) is provided with a mounting base (10).

2. The current transformer with heat dissipation as described in claim 1, characterized in that: The interior of the outer shell (1) is hollow to form an annular air passage (11), and the cross-section of the outer shell (1) is designed to be wing-shaped.

3. A current transformer with easy heat dissipation according to claim 2, characterized in that: The number of coil turns in the first winding group (3) is greater than the number of coil turns in the second winding group (4), and the first winding group (3) is used to connect the load end.

4. A current transformer with easy heat dissipation according to claim 3, characterized in that: The top of the outer casing (1) is provided with a wiring port (12), which is connected to the first winding group (3) and the second winding group (4) respectively.

5. A current transformer with easy heat dissipation according to claim 4, characterized in that: A dustproof net (13) is installed at the air inlet (7).

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