Low-loss and low-noise power transformer

Abstract

The utility model provides a power transformer with low loss and low noise, which relates to the technical field of power transformers, and comprises a power transformer, a high-voltage winding structure and an oil cylinder, the upper end of the power transformer is provided with a top plate, and the front part of the upper end surface of the top plate is provided with a plurality of groups of low-voltage bushings; a plurality of groups of high-voltage bushings are arranged at the rear part of the upper end surface of the power transformer, an oil cylinder is mounted at the left part of the upper end surface of the power transformer, four groups of high-voltage winding structures are arranged at each of the front part and the rear part of the power transformer, and a plurality of groups of reinforcing plates are sleeved in each group of high-voltage winding structures. According to the utility model, the iron core arranged inside adopts a silicon steel sheet with low magnetic density, laser nicking and high magnetic permeability, iron core seams are reduced, so that the overall performance of the equipment achieves the effects of low loss and low noise, each winding is provided with an independent oil duct, and the short-circuit resistance of the windings is improved by adopting a plurality of measures such as a reinforcing plate and a supporting strip as well as enlarging the oil duct and the like, so that the service life of the winding is prolonged. Therefore, loss is reduced, and economy and practicability are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of transformers, and particularly relates to a low-loss and low-noise power transformer. Background Art

[0002] With the development of social economy, transformers have achieved rapid development all over the world. In the specification of the existing oil-immersed power transformer (publication number CN201332004), it is mentioned that "the winding includes a low-voltage winding and a high-voltage winding coaxially installed, the low-voltage winding is located inside the high-voltage winding, the low-voltage winding includes aluminum foil and interlayer insulating paper, the aluminum foil and the interlayer insulating paper are wound in layers to form a cylindrical shape, and a spacer is also provided between the iron core and the low-voltage winding. Among them, the low-voltage winding includes two electrodes, and the two electrodes are respectively connected to the head end and the tail end of the aluminum foil", but the existing power transformers will generate a certain amount of noise and have relatively large losses, and are not low-noise and practical. Content of the Utility Model

[0003] To overcome the defects existing in the prior art, a low-loss and low-noise power transformer is provided to solve the problems that the existing power transformers will generate a certain amount of noise, have relatively large losses, and are not low-noise and practical.

[0004] To achieve the above object, a low-loss and low-noise power transformer is provided, including a power transformer, a high-voltage winding structure and an oil barrel. The upper end of the power transformer is provided with a top plate, and multiple groups of low-voltage bushings are arranged at the front part of the upper end surface of the top plate. Multiple groups of high-voltage bushings are arranged at the rear part of the upper end surface of the power transformer. An oil barrel is installed at the left part of the upper end surface of the power transformer. Four groups of high-voltage winding structures are arranged at the front and rear parts of the power transformer, and multiple groups of reinforcing plates are sleeved in each group of high-voltage winding structures.

[0005] Further, the lower end of the power transformer is provided with a base, and two grounding screens are fixed at the middle part of the lower end surface of the base. Support feet are arranged on both the left and right sides of the lower end surface of the base.

[0006] Further, a low-voltage lead terminal is arranged at the upper end of the low-voltage bushing, and a high-voltage lead terminal is arranged at the upper end of the high-voltage bushing.

[0007] Further, an upper tube body is arranged between the upper parts of multiple groups of reinforcing plates in the high-voltage winding structure, a lower tube body is arranged between the lower parts of multiple groups of reinforcing plates, and the upper tube body and the lower tube body are parallel to each other up and down.

[0008] Further, a box body is arranged at the bottom of the oil barrel, and the box body is located at the upper left side of the power transformer. Brackets are fixed on both the front and rear sides of the lower part of the oil barrel, and the lower ends of the brackets are fixed on the box body.

[0009] Further, a delivery pipe is connected to the lower part of the oil cylinder, a control valve is installed in the middle of the delivery pipe, and the other end of the delivery pipe is connected to the front part of the box body.

[0010] The beneficial effects of the utility model are as follows:

[0011] 1. In order to reduce the pollution of the power grid caused by the waveform distortion caused by the rectification system, a grounding screen made of 0.5 mm copper foil with a grounding terminal is placed between the two windings as a shielding layer, which can effectively suppress high-order harmonics.

[0012] 2. In terms of the winding structure, two independent windings are used on the valve side for separate output, and the high-voltage winding also adopts a segmented structure. While reducing the interlayer voltage, the leads can be led out more independently. Each winding has an independent oil duct, and measures such as using reinforcing plates, struts, and increasing the oil duct are adopted for the coil to improve the short-circuit resistance ability of the winding. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a front view schematic diagram of an embodiment of the utility model;

[0014] Figure 2 is a left view schematic diagram of an embodiment of the utility model;

[0015] Figure 3 is a top view schematic diagram of an embodiment of the utility model;

[0016] Figure 4 is a schematic diagram of the fuel tank structure of an embodiment of the utility model.

[0017] In the figure: 1, power transformer; 10, base; 11, grounding screen; 12, support feet; 13, top plate; 14, low-voltage bushing; 15, high-voltage bushing; 2, high-voltage winding structure; 20, reinforcing plate; 21, lower pipe body; 22, upper pipe body; 3, oil cylinder; 30, control valve; 31, delivery pipe; 32, box body; 33, bracket. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present utility model clearer and more understandable, the following further details the present utility model in conjunction with the accompanying drawings and embodiments. The specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model. Specific details such as specific system structures and technologies are proposed to more thoroughly understand the embodiments of the present utility model. The described embodiments are part of the embodiments of the present disclosure, rather than all of the embodiments. However, those skilled in the art should be clear that the present utility model can also be implemented in other embodiments without these specific details. Based on the embodiments in the present disclosure, all other embodiments obtained by those skilled in the art without creative efforts fall within the scope of protection of the present disclosure.

[0019] The following describes in detail the specific implementation manners of the present utility model in conjunction with the accompanying drawings.

[0020] Figure 1 The front view schematic diagram of the embodiment of the present utility model, Figure 2 The left view schematic diagram of the embodiment of the present utility model, Figure 3 The top view schematic diagram of the embodiment of the present utility model and Figure 4 The fuel tank structure schematic diagram of the embodiment of the present utility model.

[0021] Referring to Figures 1 to 4 As shown, the present utility model provides a low-loss and low-noise power transformer, including a power transformer 1, a high-voltage winding structure 2 and an oil cylinder 3. A top plate 13 is provided at the upper end of the power transformer 1, and multiple groups of low-voltage bushings 14 are provided at the front part of the upper end face of the top plate 13. Multiple groups of high-voltage bushings 15 are provided at the rear part of the upper end face of the power transformer 1. An oil cylinder 3 is installed at the left part of the upper end face of the power transformer 1. Four groups of high-voltage winding structures 2 are provided at the front and rear parts of the power transformer 1, and multiple groups of reinforcing plates 20 are sleeved in each group of high-voltage winding structures 2.

[0022] In this embodiment, a base 10 is provided at the lower end of the power transformer 1, and two grounding screens 11 are fixed at the middle of the lower end face of the base 10. Support feet 12 are provided on both the left and right sides of the lower end face of the base 10; a low-voltage lead terminal is provided at the upper end of the low-voltage bushing 14, and a high-voltage lead terminal is provided at the upper end of the high-voltage bushing 15.

[0023] As a preferred implementation manner, in order to reduce the pollution of the power grid caused by waveform distortion due to the rectification system, a grounding screen 11 made of 0.5 mm copper foil with a grounding terminal is also placed between the two windings as a shielding layer, which can effectively suppress high-order harmonics.

[0024] In this embodiment, an upper tube body 22 is arranged between the upper parts of multiple groups of reinforcing plates 20 in the high-voltage winding structure 2, and a lower tube body 21 is arranged between the lower parts of the multiple groups of reinforcing plates 20. Moreover, the upper tube body 22 and the lower tube body 21 are parallel to each other up and down. A box body 32 is arranged at the bottom of the oil cylinder 3, and the box body 32 is located at the upper left side of the power transformer 1. In addition, brackets 33 are fixed to the front and rear sides of the lower part of the oil cylinder 3, and the lower ends of the brackets 33 are fixed to the box body 32. A conveying pipe 31 is connected to the lower part of the oil cylinder 3, a control valve 30 is installed in the middle of the conveying pipe 31, and the other end of the conveying pipe 31 is connected to the front part of the box body 32.

[0025] As a preferred embodiment, in terms of the winding structure of the present utility model, two independent windings are used for separate output on the valve side, and the high-voltage winding also adopts a segmented structure. While reducing the interlayer voltage, the leads of each winding can be led out more easily. Each winding has an independent oil duct, and multiple measures such as using reinforcing plates, spacers, and increasing the oil duct are adopted for the coil to improve the short-circuit resistance of the winding.

[0026] The present utility model can effectively solve the problems that the existing power transformer will generate a certain amount of noise, have a relatively large loss, and is not low-noise and practical. The iron core arranged inside the present utility model adopts silicon steel sheets with low magnetic density and laser-scribed high magnetic permeability, reducing the iron core joint, so that the overall performance of the device reaches the effect of low loss and low noise. Moreover, each winding has an independent oil duct, and multiple measures such as using reinforcing plates, spacers, and increasing the oil duct are adopted for the coil to improve the short-circuit resistance of the winding, thereby reducing the loss and being more economical and practical.

[0027] The above embodiments are used to explain and illustrate the present utility model, rather than limiting the utility model. Any modifications and changes made to the present utility model within the spirit of the present utility model and the scope of the claimed rights should be included in the protection scope of the present utility model.

Claims

1. A low-loss, low-noise power transformer, characterized in that: The invention comprises a power transformer (1), a high-voltage winding structure (2) and an oil drum (3); the upper end of the power transformer (1) is provided with a top plate (13), and a plurality of low-voltage bushings (14) are provided in front of the upper end face of the top plate (13); a plurality of high-voltage bushings (15) are provided in the rear of the upper end face of the power transformer (1), and an oil drum (3) is installed on the left of the upper end face of the power transformer (1); the front and rear parts of the power transformer (1) are both provided with four high-voltage winding structures (2), and a plurality of reinforcing plates (20) are sleeved in each high-voltage winding structure (2).

2. A low-loss, low-noise power transformer according to claim 1, characterized in that: A base (10) is provided at the lower end of the power transformer (1), two sets of grounding screens (11) are fixed in the middle of the lower end surface of the base (10), and support feet (12) are provided on both left and right sides of the lower end surface of the base (10).

3. A low-loss, low-noise power transformer according to claim 1, characterized in that: The upper end of the low-voltage bushing (14) is provided with a low-voltage lead terminal, and the upper end of the high-voltage bushing (15) is provided with a high-voltage lead terminal.

4. A low-loss, low-noise power transformer according to claim 1, characterized in that: An upper tube body (22) is arranged between the upper parts of the multiple groups of reinforcing plates (20) in the high-voltage winding structure (2), and a lower tube body (21) is arranged between the lower parts of the multiple groups of reinforcing plates (20), and the upper tube body (22) and the lower tube body (21) are parallel to each other.

5. A low-loss, low-noise power transformer according to claim 1, characterized in that: A box body (32) is provided at the bottom of the oil cylinder (3), and the box body (32) is located on the upper left side of the power transformer (1), and brackets (33) are fixed on both the front and rear sides of the lower part of the oil cylinder (3), and the lower end of the bracket (33) is fixed on the box body (32).

6. A low-loss, low-noise power transformer according to claim 1, characterized in that: The lower part of the oil cylinder (3) is connected to a delivery pipe (31), a control valve (30) is installed in the middle of the delivery pipe (31), and the other end of the delivery pipe (31) is connected to the front part of the box (32).

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