A whole-turn no-load current reactor

Abstract

The utility model discloses a kind of whole turn no-loop current reactors, including several groups of iron core and winding group on the winding of iron core;The winding group is wound on the iron core using whole turn winding mode, and the wire of each circle of winding group is continuous and whole turn structure without breakpoint, and insulation layer is arranged between winding group and iron core, and the two ends of iron core are respectively provided with connecting terminal for connecting external circuit;The outer side of the winding group is provided with protective shell, and the outermost winding group between protective shell and insulation layer is filled with heat dissipation filler;The two ends of the iron core are provided with insulating plate, the outer side of insulating plate is provided with mounting plate, and mounting hole is arranged on mounting plate;The inner side of the insulating plate above the iron core is provided with cooling fan.The utility model adopts whole turn wire winding on the iron core, and the iron core is made of multilayer silicon steel sheet laminated, and insulation layer is arranged between winding group and iron core, and magnetic separation gasket is arranged between multilayer wire, which can effectively avoid circulating current, and improve power transmission efficiency.

Description

Technical Field

[0001] This utility model relates to the field of power equipment technology, and more specifically to a full-turn non-circulating current reactor. Background Technology

[0002] High-voltage air-core reactors are widely used in reactive power compensation devices and power transmission and distribution systems for functions such as current limiting, filtering, smoothing, and compensation. In applications such as frequency converters, uninterruptible power supplies (UPS), and new energy power generation, grid-side reactors (incoming line reactors) are crucial components used to suppress high-frequency harmonic currents from the power grid from flowing into the equipment, while also limiting fault currents generated during equipment short circuits.

[0003] Traditional reactor windings typically employ multi-turn segmented windings, with connection points between adjacent winding segments. These connection points are prone to generating potential differences when current flows, leading to circulating currents. These circulating currents themselves generate additional energy losses, causing the reactor temperature to rise, reducing equipment operating efficiency, and increasing operating costs. Simultaneously, uneven current distribution causes localized temperature anomalies in the reactor, accelerating equipment aging, affecting the reactor's lifespan and reliability, and frequent maintenance and replacement disrupt normal production activities.

[0004] Therefore, how to design a reactor that can effectively avoid circulating current has become an urgent problem to be solved in the field of power equipment. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a full-turn non-circulating current reactor to solve the problems of existing reactors that are prone to circulating current, have large energy loss, serious heat generation and short service life.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows.

[0007] A full-turn non-circulating current reactor includes several sets of iron cores and windings wrapped around the iron cores. The windings are wound around the iron cores in a full-turn manner, with each turn of the conductor being a continuous and uninterrupted full-turn structure. An insulating layer is provided between the windings and the iron cores. Connection terminals for connecting to external circuits are provided at both ends of the iron cores. A protective shell is provided on the outside of the windings to protect them. A heat dissipation filler is filled between the protective shell and the outermost winding to conduct heat generated by the iron cores and windings to the protective shell for heat dissipation. Insulating plates are provided at both ends of the iron cores. A mounting plate for mounting the reactor on external equipment is provided on the outside of the insulating plate, and the mounting plate is provided with mounting holes. A cooling fan for accelerating airflow between two adjacent windings is provided on the inner side of the insulating plate above the iron core.

[0008] To further optimize the technical solution, the iron core is made of multiple layers of silicon steel sheets stacked together, with the thickness of the silicon steel sheets being 0.3 to 0.5 mm, and the surface of the silicon steel sheets being coated with an insulating coating.

[0009] To further optimize the technical solution, the winding is made of copper or aluminum wire, the cross-section of the wire is circular, and the surface of the wire is covered with an insulating layer.

[0010] To further optimize the technical solution, a magnetic shielding pad is provided between adjacent turns of the winding to block electromagnetic interference between different turns of the winding.

[0011] To further optimize the technical solution, the magnetic shielding pad is made of epoxy resin with a thickness of 1-2 mm.

[0012] To further optimize the technical solution, the heat dissipation filler is thermally conductive silicone, which is filled in the gap between the protective shell and the outer winding.

[0013] Due to the adoption of the above technical solutions, the technological progress achieved by this utility model is as follows.

[0014] This utility model provides a full-turn non-circulating current reactor, which uses a full-turn conductor wound around an iron core. The iron core is made of multiple layers of silicon steel sheets, and an insulation layer is set between the winding and the iron core. Combined with magnetic isolation pads placed between the multiple layers of conductors, this effectively prevents circulating current, improves power transmission efficiency, and enhances the reactor's insulation performance, preventing leakage between the winding and the iron core and ensuring the reactor's safe and stable operation. The heat-dissipating filler between the winding and the protective shell, as well as the cooling fans between adjacent windings, can quickly dissipate the heat generated during reactor operation, reducing the reactor's temperature and extending its service life. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the installation position of the cooling fan in this utility model; Figure 3 This is a schematic diagram of the internal structure of this utility model.

[0016] The components are: 1. Iron core, 2. Insulation board, 3. Mounting plate, 4. Mounting hole, 5. Protective shell, 6. Connecting terminal, 7. Connecting hole, 8. Cooling fan, 9. Winding, 10. Magnetic shielding pad. Detailed Implementation

[0017] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0018] A full-turn non-circulating current reactor, combined with Figures 1 to 3As shown, it includes several sets of iron cores 1 and windings 9 wrapped around the iron cores 1. The iron cores 1 are made of multiple layers of silicon steel sheets, the thickness of which is 0.3 to 0.5 mm. The surface of the silicon steel sheets is coated with an insulating layer to enhance the insulation performance and prevent eddy currents and circulating currents from being generated inside the iron core.

[0019] The winding 9 is wound on the iron core 1 in a full-turn winding manner. Each turn of the conductor in the winding 9 is a continuous full-turn structure without any breaks. An insulation layer is provided between the winding 9 and the iron core 1. The insulation layer is made of polyimide film. Terminals 6 are provided at both ends of the winding 9. Connection holes 7 are provided on the terminals 6 to connect to the external circuit and realize the connection between the reactor and the external circuit.

[0020] Winding 9 is made of copper or aluminum wire, with a circular cross-section and an insulating layer covering the surface of the guide to improve the insulation performance and high temperature resistance of the winding.

[0021] A magnetic shielding pad 10 is provided between adjacent turns of winding 9. The magnetic shielding pad is made of epoxy resin and has a thickness of 1-2 mm. It can effectively block electromagnetic interference between windings of different turns and avoid the generation of circulating current.

[0022] A protective shell 5 is installed on the outside of winding 9 to protect the winding. A heat-dissipating material is filled between the protective shell 5 and the outermost winding to conduct heat generated by the core and winding to the protective shell for dissipation. The heat-dissipating filler is thermally conductive silicone, which fills the gap between the protective shell 5 and winding 9. This silicone quickly conducts heat generated by the core and winding to the protective shell, and then dissipates it into the air, improving the reactor's heat dissipation effect. The protective shell 5 is made of aluminum; aluminum has good thermal conductivity, which accelerates the dissipation of heat from the reactor.

[0023] Insulating plates 2 are provided at both ends of the iron core 1. A mounting plate 3 is provided on the outside of the insulating plate 2. The mounting plate is provided with mounting holes 4 for mounting the reactor on external equipment. A cooling fan 8 is provided on the inside of the insulating plate 2 above the iron core 1 to accelerate the air circulation between two adjacent windings and accelerate the heat dissipation of the reactor.

[0024] In the assembly of this utility model, silicon steel sheets are first stacked into an iron core, then an insulating layer is wrapped around the outside of the iron core, and then copper or aluminum wires are wound around the iron core in a full turn. A magnetic shielding pad is placed after each layer is wound, and finally a protective shell 5 is set on the outside of the wound winding through thermally conductive silicone to complete the assembly of the reactor.

[0025] During operation, the reactor core is made of multiple layers of silicon steel sheets, and the surface of the silicon steel sheets is coated with an insulating layer. At the same time, magnetic isolation pads are set between each layer of wires, which can effectively prevent the generation of circulating current and reduce the loss of the reactor. A protective shell is set on the outer layer of the winding through thermally conductive silicone grease, which can accelerate the heat dissipation of the winding and ensure the stable operation of the reactor.

Claims

1. A full-turn non-circulating current reactor, characterized in that: It includes several sets of iron cores (1) and windings (9) wrapped around the iron cores (1); the windings (9) are wound on the iron cores (1) in a full-turn winding manner, and each turn of the conductor of the windings (9) is a continuous and uninterrupted full-turn structure. An insulating layer is provided between the windings (9) and the iron cores (1), and connection terminals (6) for connecting to external circuits are respectively provided at both ends of the iron cores (1); a protective shell (5) is provided on the outside of the windings (9) to protect the windings (9). The space between the core (1) and the outermost winding (9) is filled with heat dissipation filler for conducting heat generated by the core and winding to the protective shell for heat dissipation; both ends of the core (1) are provided with insulating plates (2), and the outer side of the insulating plate (2) is provided with a mounting plate (3) for mounting the reactor on an external device, and the mounting plate (3) is provided with mounting holes (4); the inner side of the insulating plate (2) above the core (1) is provided with a cooling fan (8) for accelerating the airflow between two adjacent windings.

2. A full-turn non-circulating current reactor according to claim 1, characterized in that: The iron core (1) is made of multiple layers of silicon steel sheets, the thickness of which is 0.3 to 0.5 mm, and the surface of the silicon steel sheets is coated with an insulating coating.

3. A full-turn non-circulating current reactor according to claim 1, characterized in that: The winding (9) is made of copper or aluminum wire, the cross-section of the wire is circular, and the surface of the wire is covered with an insulating layer.

4. A full-turn non-circulating current reactor according to claim 1, characterized in that: A magnetic shielding pad (10) is provided between adjacent turns of the winding (9) to block electromagnetic interference between windings of different turns.

5. A full-turn non-circulating current reactor according to claim 4, characterized in that: The magnetic shielding pad (10) is made of epoxy resin and has a thickness of 1-2 mm.

6. A full-turn non-circulating current reactor according to claim 1, characterized in that: The heat dissipation filler is thermally conductive silicone, which is filled in the gap between the protective shell and the outer winding.

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