A low-noise series reactor

Abstract

This invention belongs to the field of reactor technology and relates to a low-noise series reactor. The two lateral yoke magnetic circuits, the upper yoke magnetic circuit, and the lower yoke magnetic circuit together form a rectangular magnetic circuit structure, effectively reducing the magnetic flux density of the upper and lower end magnetic shields, thereby reducing noise generation. The magnetic circuit joints between the lateral yoke magnetic circuit and the upper yoke magnetic circuit are both fully oblique joints, which reduces abrupt changes and concentrations of magnetic flux at the joints, further reducing local vibration and noise. The rectangular magnetic circuit structure is located within the outer frame of the magnetic circuit, providing external mechanical support for the entire rectangular magnetic circuit structure and ensuring the structural stability of the reactor during operation. Furthermore, the outer frame can, to a certain extent, block the propagation of noise generated inside the reactor outwards, further reducing the external noise impact of the reactor during operation.

Description

Technical Field

[0001] This utility model belongs to the field of reactor technology and relates to a low-noise series reactor. Background Technology

[0002] High-impedance power transformers are widely used in the market due to their relatively small short-circuit current. For high-voltage impedance power transformers, compared to traditional schemes that involve changing the winding arrangement, the scheme with built-in series reactors offers better economic efficiency and results in lower leakage flux within the main transformer, making it more popular with transformer manufacturers and end customers.

[0003] Built-in series reactors typically employ a hollow design, which offers numerous advantages. Structurally, the hollow winding is the core component, secured to the reactor's yoke by spacers. These spacers not only fix the winding's position and ensure relative stability between the winding and the yoke but also buffer vibrations generated during operation. The upper and lower yokes are tightened by tie rods. This structural approach ensures the overall stability of the reactor, enabling it to maintain a relatively stable form under electrical and mechanical stresses and reducing the risk of failures due to structural loosening.

[0004] However, hollow high-impedance built-in series reactors also have some significant drawbacks, with noise being a particularly prominent issue. During reactor operation, the current in the windings generates an alternating magnetic field in the surrounding space. This alternating magnetic field interacts with the windings themselves and components such as the yoke, causing vibrations in these components. Simultaneously, structural components such as the tie rod also vibrate to some extent under the combined action of electromagnetic and mechanical forces. These vibrations superimpose, resulting in considerable noise. In locations with high environmental noise control requirements, such as substations near residential areas, this noise problem can disrupt the lives of nearby residents. Utility Model Content

[0005] The purpose of this invention is to provide a low-noise series reactor to solve the technical problem of high noise in air-core reactors.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: This utility model discloses a low-noise series reactor, comprising: two side yoke magnetic circuits, an upper yoke magnetic circuit, a lower yoke magnetic circuit, and a magnetic circuit outer frame; The two lateral yoke magnetic circuits, the upper yoke magnetic circuit, and the lower yoke magnetic circuit together form a rectangular magnetic circuit structure. The magnetic circuit joint between the lateral yoke magnetic circuit and the upper yoke magnetic circuit is a fully oblique joint, and the magnetic circuit joint between the lateral yoke magnetic circuit and the lower yoke magnetic circuit is a fully oblique joint. The rectangular magnetic circuit structure is located within the outer frame of the magnetic circuit, and an insulating material is provided between the rectangular magnetic circuit structure and the outer frame of the magnetic circuit.

[0007] Furthermore, the two lateral yoke magnetic circuits, the upper yoke magnetic circuit and the lower yoke magnetic circuit are arranged in parallel.

[0008] Furthermore, the magnetic circuit outer frame includes two parallel side yoke plates and two parallel clamps, which are connected together to form the magnetic circuit outer frame.

[0009] Furthermore, the lateral yoke plate and the clamp are fixedly connected by connecting bolts.

[0010] Furthermore, the angle between the fully oblique joint and the axial direction of the side yoke magnetic circuit is 45°.

[0011] Furthermore, a pressure plate and a support plate are provided between the upper yoke magnetic circuit and the lower yoke magnetic circuit. The pressure plate is located at the bottom of the upper yoke magnetic circuit, and the support plate is located at the top surface of the lower yoke magnetic circuit. The pressure plate and the support plate are fixedly connected by several pull screws.

[0012] Furthermore, several of the aforementioned pull screws are evenly arranged on both sides of the rectangular magnetic circuit structure; The pressure plate and the tray are made of polyester cryogel.

[0013] Furthermore, the outer side of the magnetic circuit outer frame is provided with an upper beam and a bottom foot. The upper yoke magnetic circuit is located between the upper beam and the pressure plate, and the lower yoke magnetic circuit is located between the bottom foot and the support plate. Both the upper beam and the bottom foot are fixedly connected to the pull screw.

[0014] Furthermore, the pressure plate, the support plate, the upper beam, and the base are all arranged in parallel.

[0015] Furthermore, side beams are provided on both sides of the lateral yoke magnetic circuit, the side beams are at the same height as the upper yoke magnetic circuit, and the side beams are fixedly connected to the upper beam.

[0016] Compared with the prior art, the present invention has the following beneficial effects: This invention, comprising two lateral magnetic circuits, an upper magnetic circuit, and a lower magnetic circuit, forms a rectangular magnetic circuit structure. This structure avoids magnetic flux dissipation and local concentration, effectively reducing the magnetic flux density of the upper and lower end magnetic shields. It fundamentally reduces component vibration caused by phenomena such as magnetostriction, thereby reducing noise generation. The joints between the lateral and upper magnetic circuits are both fully oblique, as are the joints between the lateral and lower magnetic circuits. Compared to traditional direct joints, fully oblique joints allow for smoother magnetic flux passage through the joints, reducing abrupt changes and concentrations at the joints, resulting in a more uniform magnetic flux density throughout the entire magnetic circuit. This further reduces local vibration and noise caused by uneven magnetic flux, improving the reactor's noise reduction effect. The rectangular magnetic circuit structure is located within the outer frame of the magnetic circuit, providing external mechanical support and protecting the structure from damage by external mechanical forces, ensuring the structural stability of the reactor during operation. A stable structure reduces additional noise caused by mechanical vibration. In addition, the magnetic circuit outer frame can, to some extent, block the propagation of noise generated inside the reactor, further reducing the external noise impact during reactor operation. Insulating material is provided between the rectangular magnetic circuit structure and the magnetic circuit outer frame to prevent electrical short circuits between the magnetic circuit structure and the outer frame, ensuring the safe operation of the reactor. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 for Figure 1 Side view; Figure 3 This is a schematic diagram of the rectangular magnetic circuit structure of this utility model; Figure 4 for Figure 3 Side view.

[0018] Among them: 001, side yoke magnetic circuit; 002, upper yoke magnetic circuit; 003, lower yoke magnetic circuit; 004, magnetic circuit joint; 005, side yoke pull plate; 006, clamp; 007, connecting bolt; 008, pressure plate; 009, support plate; 010, upper beam; 011, base; 012, side beam; 013, tie rod; 014, magnetic circuit outer frame. Detailed Implementation

[0019] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0020] It should be noted that the terms "first," "second," etc., in the specification and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this utility model described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0021] The present invention will now be described in further detail with reference to the accompanying drawings: See Figures 1 to 4 This utility model discloses a low-noise series reactor, comprising: two side yoke magnetic circuits 001, an upper yoke magnetic circuit 002, a lower yoke magnetic circuit 003, and a magnetic circuit outer frame 014; See Figure 3 and Figure 4 The two lateral yoke magnetic circuits 001, the upper yoke magnetic circuit 002, and the lower yoke magnetic circuit 003 together form a rectangular magnetic circuit structure. This closed magnetic circuit structure changes the direction and distribution of magnetic flux, allowing the magnetic flux to circulate more smoothly within the magnetic circuit, avoiding the dissipation and local concentration of magnetic flux, effectively reducing the magnetic flux density of the upper and lower end magnetic shields, and fundamentally reducing component vibration caused by phenomena such as magnetostriction, thereby reducing noise generation.

[0022] See Figure 3 Preferably, the two lateral yoke magnetic circuits 001, the upper yoke magnetic circuit 002 and the lower yoke magnetic circuit 003 are arranged in parallel.

[0023] See Figure 3The magnetic circuit joint 004 between the side yoke magnetic circuit 001 and the upper yoke magnetic circuit 002 is a fully oblique joint, and the magnetic circuit joint 004 between the side yoke magnetic circuit 001 and the lower yoke magnetic circuit 003 is also a fully oblique joint. Compared to the traditional direct joint, the fully oblique joint allows the magnetic flux to pass through the joint more smoothly, reducing abrupt changes and concentrations of magnetic flux at the joint, resulting in a more uniform magnetic flux density throughout the entire magnetic circuit. This uniform magnetic flux distribution further reduces local vibrations and noise caused by uneven magnetic flux, improving the noise reduction effect of the reactor.

[0024] Preferably, the angle between the fully oblique joint and the axial direction of the side yoke magnetic circuit 001 is 45°, which makes the magnetic flux pass through the joint more smoothly and reduces the abrupt change and concentration of magnetic flux at the joint.

[0025] See Figure 1 and Figure 2 The rectangular magnetic circuit structure is located within the outer frame 014, providing external mechanical support for the entire rectangular magnetic circuit structure. This protects the magnetic circuit structure from damage caused by external mechanical forces, ensuring the structural stability of the reactor during operation. A stable structure reduces additional noise caused by mechanical vibration. Furthermore, the outer frame 014 can, to some extent, block the propagation of noise generated inside the reactor, providing a certain sound insulation effect and further reducing the external noise impact during reactor operation. Insulating material is provided between the rectangular magnetic circuit structure and the outer frame 014 to prevent electrical short circuits between the magnetic circuit structure and the outer frame, ensuring the safe operation of the reactor.

[0026] See Figure 1 Preferably, the magnetic circuit outer frame 014 includes two parallel side yoke pull plates 005 and two parallel clamps 006, and the two side yoke pull plates 005 and the two clamps 006 are connected together to form the magnetic circuit outer frame 014.

[0027] See Figure 1 Preferably, the lateral yoke plate 005 and the clamp 006 are fixedly connected by connecting bolts 007.

[0028] See Figure 2 Preferably, a pressure plate 008 and a support plate 009 are provided between the upper yoke magnetic circuit 002 and the lower yoke magnetic circuit 003. The pressure plate 008 is located at the bottom of the upper yoke magnetic circuit 002, and the support plate 009 is located on the top surface of the lower yoke magnetic circuit 003. The pressure plate 008 and the support plate 009 are fixedly connected by a plurality of pull screws 013.

[0029] Preferably, a plurality of the pull screws 013 are evenly arranged on both sides of the rectangular magnetic circuit structure; The pressure plate 008 and the tray 009 are made of polyester cryogel.

[0030] See Figure 2 Preferably, the outer side of the magnetic circuit outer frame 014 is provided with an upper beam 010 and a base 011. The upper yoke magnetic circuit 002 is located between the upper beam 010 and the pressure plate 008, and the lower yoke magnetic circuit 003 is located between the base 011 and the support plate 009. The upper beam 010 and the base 011 are both fixedly connected to the pull rod 013.

[0031] Preferably, the pressure plate 008, the support plate 009, the upper beam 010, and the base 011 are all arranged in parallel.

[0032] See Figure 1 Preferably, the side yoke magnetic circuit 001 is provided with side beams 012 on both sides, the side beams 012 and the upper yoke magnetic circuit 002 are located at the same height, and the side beams 012 are fixedly connected to the upper beam 010.

[0033] This invention, through the coordinated operation of its various components, forms a low-noise, high-performance electrical device. The closed rectangular magnetic circuit structure and the fully oblique joint design ensure a more uniform distribution of magnetic flux within the circuit, effectively reducing the magnetic flux density of the upper and lower magnetic shields and minimizing noise generation at the source. The outer frame 014 of the magnetic circuit not only provides mechanical support and protection but also offers some sound insulation. Overall, this reactor significantly reduces noise levels during operation while maintaining electrical performance.

[0034] Example 2: like Figures 1 to 4 As shown, this utility model relates to a low-noise series reactor, including a side yoke magnetic circuit 001, an upper yoke magnetic circuit 002, a lower yoke magnetic circuit 003, a magnetic circuit joint 004, a side yoke pull plate 005, a clamp 006, a connecting bolt 007, a pressure plate 008, a support plate 009, an upper beam 010, a base 011, a side beam 012, and a pull rod 013.

[0035] By employing the side yoke magnetic circuit 001, together with the upper yoke magnetic circuit 002 and the lower yoke magnetic circuit 003, a closed magnetic circuit is formed through the magnetic circuit joint 004.

[0036] The metal frame structure is formed by connecting the side yoke plate 005 and the clamp 006 with the connecting bolts 007, which increases the clamp strength of the magnetic circuit.

[0037] The pressure plate 008 and support plate 009, which adopt the polyester cold gel process, enhance the mechanical strength of the insulation material of the device body. The feature of this utility model is that it adopts multiple measures to reduce the noise of the reactor.

[0038] This invention employs a magnetic circuit structure with side yoke shielding, forming a closed magnetic circuit with the upper and lower yoke magnetic circuits. The magnetic flux generated by the hollow winding passes through the side yoke and forms a closed circuit with the upper and lower yoke magnetic circuits, reducing the magnetic flux density of the upper and lower end magnetic shields, thereby reducing noise. The joint type of the closed magnetic circuit is a fully oblique joint, which results in a more uniform magnetic flux density compared to the traditional direct joint, thus reducing noise. A tension plate is added outside the side yoke to connect with the clamping parts of the upper and lower magnetic shields, forming a metal frame structure, increasing the clamping strength of the magnetic circuit, reducing magnetic circuit vibration, and lowering noise. Polyester cryogenic gel pressure plates and support plates are used to enhance the mechanical strength of the insulation material and reduce reactor noise.

[0039] This utility model has a simple overall structure, simple manufacturing process, safety and reliability, and good economic efficiency.

[0040] The above content is only for illustrating the technical concept of this utility model and should not be construed as limiting the scope of protection of this utility model. Any modifications made to the technical solution based on the technical concept proposed in this utility model shall fall within the scope of protection of this utility model.

Claims

1. A low-noise series reactor, characterized in that, include: Two side yoke magnetic circuits (001), upper yoke magnetic circuit (002), lower yoke magnetic circuit (003) and magnetic circuit outer frame (014); The two lateral yoke magnetic circuits (001), the upper yoke magnetic circuit (002), and the lower yoke magnetic circuit (003) together form a rectangular magnetic circuit structure. The magnetic circuit joint (004) between the lateral yoke magnetic circuit (001) and the upper yoke magnetic circuit (002) is a fully oblique joint, and the magnetic circuit joint (004) between the lateral yoke magnetic circuit (001) and the lower yoke magnetic circuit (003) is a fully oblique joint. The rectangular magnetic circuit structure is located inside the magnetic circuit outer frame (014), and an insulating material is provided between the rectangular magnetic circuit structure and the magnetic circuit outer frame (014).

2. The low-noise series reactor according to claim 1, characterized in that, The two said lateral yoke magnetic circuits (001), the upper yoke magnetic circuit (002) and the lower yoke magnetic circuit (003) are arranged in parallel.

3. A low-noise series reactor according to claim 2, characterized in that, The magnetic circuit outer frame (014) includes two parallel side yoke pull plates (005) and two parallel clamps (006), which are connected together to form the magnetic circuit outer frame (014).

4. A low-noise series reactor according to claim 3, characterized in that, The yoke pull plate (005) and the clamp (006) are fixedly connected by connecting bolts (007).

5. A low-noise series reactor according to claim 1, characterized in that, The angle between the fully oblique joint and the axial direction of the side yoke magnetic circuit (001) is 45°.

6. A low-noise series reactor according to claim 1, characterized in that, A pressure plate (008) and a support plate (009) are provided between the upper yoke magnetic circuit (002) and the lower yoke magnetic circuit (003). The pressure plate (008) is located at the bottom of the upper yoke magnetic circuit (002), and the support plate (009) is located on the top surface of the lower yoke magnetic circuit (003). The pressure plate (008) and the support plate (009) are fixedly connected by several pull screws (013).

7. A low-noise series reactor according to claim 6, characterized in that, Several of the aforementioned pull screws (013) are evenly arranged on both sides of the rectangular magnetic circuit structure; The pressure plate (008) and the tray (009) are made of polyester cryogel.

8. A low-noise series reactor according to claim 6, characterized in that, The outer frame (014) of the magnetic circuit is provided with an upper beam (010) and a base (011). The upper yoke magnetic circuit (002) is located between the upper beam (010) and the pressure plate (008). The lower yoke magnetic circuit (003) is located between the base (011) and the support plate (009). The upper beam (010) and the base (011) are both fixedly connected to the pull rod (013).

9. A low-noise series reactor according to claim 8, characterized in that, The pressure plate (008), the support plate (009), the upper beam (010), and the base (011) are all arranged in parallel.

10. A low-noise series reactor according to claim 8, characterized in that, The side yoke magnetic circuit (001) is provided with side beams (012) on both sides. The side beams (012) and the upper yoke magnetic circuit (002) are located at the same height. The side beams (012) are fixedly connected to the upper beam (010).

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