Water-cooled single-spiral anode reactor

Abstract

A water-cooling single helix type anode reactor comprises a coil assembly and a heat dissipation pipe arranged in the coil assembly. The coil assembly comprises a coil, a coil connecting bar, a bus bar, a bus bar connecting bar and an insulation layer arranged at the periphery of the coil. The coil connecting bar is welded to the periphery of two coils at one end, and two bus bars are arranged at the other end of the coil opposite to the coil connecting bar. The bus bars are connected to different coils through the bus bar connecting bar. The coil comprises a cylinder and a helical groove arranged through the cylinder. The insulation layer is cast between the turns of the coil and the periphery of the adjacent coil, and the heat dissipation pipes in different coils are arranged in communication. The water-cooling single helix type anode reactor enhances the explosion-proof performance of the anode reactor by arranging the coil and the insulation layer and enhancing the structural strength of the coil.

Description

Technical Field

[0001] This utility model relates to the field of anode reactors, and in particular to a water-cooled single-spiral anode reactor. Background Technology

[0002] With the widespread application of next-generation semiconductor materials such as silicon carbide (SiC) and integrated gate commutated thyristors (IGCTs), the core device of flexible DC transmission technology is gradually shifting from insulated gate bipolar transistors (IGBTs) to IGCTs. During the commutation process, to ensure the safe operation of the IGCT device, an anode reactor is required to limit the current rise rate (di / dt). When an overvoltage short circuit occurs in the power module of the IGCT flexible DC converter valve, the power capacitor voltage will be charged to a higher value, resulting in passive direct discharge and generating large discharge energy. A large surge current will flow through the direct-through circuit (including the anode reactor), causing the anode reactor to withstand enormous electrodynamic forces, potentially leading to destructive damage such as explosion or breakage.

[0003] Currently, the structure of commercially available anode reactors is generally as follows:

[0004] 1. Hollow copper or aluminum tubes are used as windings, with the tube body metal as the conductor. Water is circulated inside the tube for cooling, and the entire structure is insulated by epoxy resin casting. This type of reactor has a relatively stable inductance value, but when subjected to surge current impacts, the epoxy resin is prone to bursting, and the water-cooling interface can also be damaged, posing serious safety hazards and secondary damage from water leakage.

[0005] Second, the windings are made of aluminum foil, the reactor body is naturally cooled, and only the busbar is cooled by water. The insulation material is encapsulated with silicone rubber. Although the structure is more compact, the aluminum foil ends are prone to breakage under the impact of fault surge current, and the outer shell may also burst due to a sharp increase in internal pressure. The overall structure still lacks explosion-proof capability.

[0006] Although the aforementioned anode reactors can limit the rate of current rise in actual use, they lack effective explosion-proof measures in their structure. Even if there are explosion-proof reactors, their structures are complex and their manufacturing costs are high. Utility Model Content

[0007] In view of this, the present invention provides a water-cooled single-spiral anode reactor with a single-spiral coil structure to improve the reactor's burst resistance, and the use of a hollow coil to reduce the reactor's production cost and simplify the reactor's production process.

[0008] A water-cooled single-spiral anode reactor includes at least one coil assembly and at least two heat dissipation tubes disposed within the coil assembly. The coil assembly includes at least two coils, at least one coil connecting busbar connecting the two coils, at least two busbars disposed at one end of each coil, at least two busbar connecting busbars connecting the busbars and the coils respectively, and at least one insulating layer disposed on the outer periphery of the coils. The two coils are connected in series. The coil connecting busbar is welded to one end of the outer periphery of the two coils, and the two busbars are disposed at the other end of the coils opposite the coil connecting busbar. The busbars are connected to different coils respectively via the busbar connecting busbars. Each coil includes a cylindrical body and a spiral groove extending through the cylindrical body. The insulating layer is cast between the turns of the coil and on the outer periphery of adjacent coils. The heat dissipation tubes in the two different coils are interconnected.

[0009] Furthermore, the water-cooled single-spiral anode reactor also includes a housing disposed outside the coil assembly. The housing is box-shaped, and the busbar and the heat dissipation pipe pass through the housing and are connected to an external water channel or an external circuit. An epoxy resin layer is cast between the housing and the coil assembly.

[0010] Furthermore, the busbar connection is arranged in a Y-shape, with the two ends on the same side of the Y-shape welded to a single coil, and the other side of the Y-shape welded to the busbar.

[0011] Furthermore, the heat dissipation tube is embedded within the inner circumference of the coil, or a mounting groove is provided on the outer circumference of the coil along the coil winding direction. The heat dissipation tube is disposed in the mounting groove.

[0012] Furthermore, the heat dissipation pipe is arranged in a spiral shape.

[0013] Furthermore, the inlet and outlet of the heat dissipation pipe are located on the same side as the busbar.

[0014] Compared with existing technologies, the water-cooled single-spiral anode reactor provided by this utility model features a coil assembly and a heat dissipation channel, improving the reactor's burst resistance through the single-spiral coil structure. The coil in the coil assembly is formed by cutting a cylindrical body through the spiral groove, and the cylindrical structure strengthens the coil's structural strength. The insulating layer insulates the coil and further enhances its structural strength. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of a water-cooled single-spiral anode reactor provided in Embodiment 1.

[0016] Figure 2 for Figure 1The schematic diagram shows the structure of the coil assembly and heat dissipation pipe of the water-cooled single-spiral anode reactor.

[0017] Figure 3 for Figure 1 The schematic diagram shows the structure of the coil and coil connection bar of the water-cooled single-spiral anode reactor.

[0018] Figure 4 for Figure 1 The diagram shows the structure of the coil assembly in the water-cooled single-spiral anode reactor.

[0019] Figure 5 for Figure 1 The schematic diagram of the heat dissipation tube in the water-cooled single-spiral anode reactor is shown.

[0020] Figure 6 This is a schematic diagram of the structure of the water-cooled single-spiral anode reactor provided in Embodiment 2.

[0021] Figure 7 for Figure 6 The schematic diagram shows the structure of the coil assembly and heat dissipation pipe of the water-cooled single-spiral anode reactor.

[0022] Figure 8 for Figure 6 The schematic diagram shows the structure of the water-cooled single-spiral anode reactor, including the coil, coil connection bar, busbar, busbar connection bar, and heat dissipation pipe. Detailed Implementation

[0023] The specific embodiments of this utility model are described in further detail below. It should be understood that the description of the embodiments of this utility model herein is not intended to limit the scope of protection of this utility model.

[0024] The terminology used herein is intended to explain the embodiments and is not intended to limit and / or restrict the present invention. It should be understood that the terms "front," "rear," "left," "right," "upper," "lower," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are used only for the convenience of describing the present invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0025] Please see Figures 1 to 5This is a structural schematic diagram of a water-cooled single-spiral anode reactor provided by this utility model. The water-cooled single-spiral anode reactor includes at least one coil assembly 10, at least two heat dissipation pipes 20 disposed in the coil assembly 10, and a housing 30 disposed outside the coil assembly 10. It is conceivable that the water-cooled single-spiral anode reactor also includes other functional modules, such as sealing rings, which are technologies known to those skilled in the art and will not be described in detail here.

[0026] The coil assembly 10 includes at least two coils 11, at least one coil connection bar 12 connecting the two coils 11, at least two busbars 13 disposed at one end of the coils 11, at least two busbar connection bars 14 respectively connecting the busbars 13 and the coils 11, and at least one insulating layer 15 disposed on the outer periphery of the coils 11.

[0027] Two coils 11 are connected in series. A coil connecting bus 12 is welded to one end of the outer periphery of the two coils 11. Two busbars 13 are located at the other end of each coil 11 opposite the coil connecting busbar 12. Each busbar 13 is connected to a different coil 11 via a busbar connecting busbar 14 to form a series circuit. The coils 11 provide reactance to maintain current stability in the external circuit. The coil connecting busbar 12 connects the two coils 11. The two busbars 13 are respectively connected to the positive and negative terminals of an external power supply. The busbar connecting busbar 14 is Y-shaped, with one end of the Y-shape welded to a single coil 11, and the other end of the Y-shape welded to a busbar 13. An insulating layer 15 is cast between the turns of the coils 11 and around the outer periphery of adjacent coils 11, so that the outer contours of the two coils 11 are two connected circles. The insulating layer 15 provides inter-turn insulation and peripheral insulation for the coils 11, preventing deformation of the coils 11 from causing accidental short circuits. It is conceivable that, depending on the application scenario of the anode reactor, the coil 11 can also be connected in parallel.

[0028] The coil 11 includes a cylindrical body 111 and a spiral groove 112 extending through the cylindrical body 111. While ensuring current density, the disc-shaped structure of each turn of the coil 11 provides excellent mechanical properties, effectively improving the mechanical strength of the coil 11. The coil 11 is supported using a material removal method, employing an aluminum cylinder substrate, and is manufactured through machining or laser cutting. Compared to traditional manual winding methods, this coil 11 manufacturing method significantly improves work efficiency and processing accuracy.

[0029] The heat dissipation pipe 20 is embedded in the inner circumference of the coil 11 and is spirally arranged to increase the heat dissipation area and enhance the heat dissipation capacity. The heat dissipation pipes 20 in two different coils 11 are connected. The water inlet 31 and water outlet 22 of the heat dissipation pipe 20 are located on the same side as the busbar 13.

[0030] The outer casing 30 is box-shaped. The busbar 13 and the heat dissipation pipe 20 pass through the outer casing and are connected to an external water channel or external circuit. An epoxy resin layer is cast between the outer casing and the coil 11 assembly 10, thereby strengthening the structural strength of the coil 11, the busbar 13, and the heat dissipation pipe 20. The outer casing 20 is made of a high-strength, non-magnetic metal material, preferably aluminum, which is inexpensive and easy to process.

[0031] The manufacturing process of the water-cooled single-spiral anode reactor is as follows:

[0032] The first step is to cut grooves in the aluminum cylinder substrate to form coils 11. Two coils 11 are connected by welding the coil connecting busbar 12, and each individual coil 11 is welded to the busbar connecting busbar 14. The second step is to embed the heat dissipation tube 20 in the coil 11. The third step is to pour an insulating layer 15 on the outside of the coil 11. The fourth step is to position the coil assembly 10 in the outer shell 30, weld the busbar connecting busbar 14 to the busbar 13, and pour epoxy resin between the outer shell 30 and the coil assembly 10 for fixation.

[0033] Example 2

[0034] This embodiment is an improvement based on Embodiment 1. The parts disclosed in Embodiment 1 will not be repeated. The content disclosed in Embodiment 1 also belongs to the content disclosed in Embodiment 2.

[0035] See Figures 6 to 8 This is a schematic diagram of a water-cooled single-spiral anode reactor according to Embodiment 2. The difference between Embodiment 2 and Embodiment 1 is that: a mounting groove 40 is provided around the outer periphery of the coil 11 along the winding direction of the coil 11. The heat dissipation pipe 20 is disposed in the mounting groove 12. The shape of the mounting groove 40 is set according to the shape of the heat dissipation pipe 20.

[0036] The manufacturing process of the water-cooled single-spiral anode reactor is as follows:

[0037] The first step is to cut grooves in the aluminum cylinder substrate to form a coil 11, and then process the mounting groove 111 on the coil 11 to position the heat dissipation pipe 20 in the mounting groove 40. The second step is to connect two coils 11 by welding the coil connecting busbar 12, and weld the busbar connecting busbar 14 to each individual coil 11. The third step is to pour an insulating layer 15 on the outside of the coil 11. The fourth step is to position the coil assembly 10 in the outer shell 30, weld the busbar connecting busbar 14 to the busbar 13, and pour epoxy resin between the outer shell 30 and the coil assembly 10 for fixation.

[0038] Compared with the prior art, the water-cooled single-spiral anode reactor provided by this utility model has the coil assembly 10 and the heat dissipation channel 20 configured, and the single-spiral coil structure improves the reactor's resistance to bursting. The coil 11 in the coil assembly 10 is formed by cutting the cylindrical body 111 through the spiral groove 112, and the cylindrical body 111 structure strengthens the structural strength of the coil 11. The insulating layer 15 insulates the coil 11 and strengthens the structural strength of the coil 11.

[0039] The above are merely preferred embodiments of the present utility model and are not intended to limit the scope of protection of the present utility model. Any modifications, equivalent substitutions or improvements within the spirit of the present utility model are covered within the scope of the claims of the present utility model.

Claims

1. A water-cooled single-spiral anode reactor, characterized in that: The water-cooled single-spiral anode reactor includes at least one coil assembly and at least two heat dissipation tubes disposed in the coil assembly. The coil assembly includes at least two coils, at least one coil connecting bar connecting the two coils, at least two busbars disposed at one end of the coils, at least two busbar connecting bars connecting the busbars and the coils respectively, and at least one insulating layer disposed on the outer periphery of the coils. The two coils are connected in series, and the coil connecting bar is welded to one end of the outer periphery of the two coils. The two busbars are disposed at the other end of the coils opposite to the coil connecting bar. The busbars are respectively connected to different coils through the busbar connecting bars. The coil includes a cylindrical body and a spiral groove disposed through the cylindrical body. The insulating layer is cast between the turns of the coil and on the outer periphery of adjacent coils. The heat dissipation tubes in the two different coils are interconnected.

2. The water-cooled single-spiral anode reactor as described in claim 1, characterized in that: The water-cooled single-spiral anode reactor also includes a housing disposed outside the coil assembly. The housing is box-shaped. The busbar and the heat dissipation pipe pass through the housing and are connected to an external water channel or an external circuit. An epoxy resin layer is cast between the housing and the coil assembly.

3. The water-cooled single-spiral anode reactor as described in claim 1, characterized in that: The busbar connection is arranged in a Y shape, with the two ends of the same side of the Y shape welded to a single coil, and the other side of the Y shape welded to the busbar.

4. The water-cooled single-spiral anode reactor as described in claim 1, characterized in that: The heat dissipation tube is embedded in the inner circumference of the coil, or the outer circumference of the coil is provided with a mounting groove along the coil winding direction, and the heat dissipation tube is disposed in the mounting groove.

5. The water-cooled single-spiral anode reactor as described in claim 1, characterized in that: The heat dissipation pipe is arranged in a spiral shape.

6. The water-cooled single-spiral anode reactor as described in claim 1, characterized in that: The inlet and outlet of the heat dissipation pipe are located on the same side as the busbar.

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