A magnetic circuit structure adjustable reactor

Abstract

The application relates to a magnetic circuit structure adjustable reactor, and relates to the technical field of electromagnetic elements. In order to solve the problems of non-continuous smoothness of inductance adjustment and single load adaptation of traditional adjustable reactors, the application comprises a stator-mover assembly, the stator-mover assembly comprises a stator, a coil and a mover iron core, the coil is arranged in the tooth part of the stator; the mover iron core is coaxially arranged in the cavity of the stator, the number of teeth of the mover iron core is the same as that of the stator and the positions correspond to each other; a screw rod adjusting assembly is in transmission connection with the mover iron core, and the stator-mover assembly and the screw rod adjusting assembly are both located in a reactor shell. The axial coupling length of the stator and the mover can be adjusted through the screw rod adjusting assembly, the axial coupling area of the stator teeth and the mover teeth is changed, the output inductance value of the linear smoothness adjustable reactor is realized, and meanwhile, the wiring mode of the reactor coil can be changed, so that the three-phase inductance values output by the reactor are the same under the conditions of three-phase symmetrical load and three-phase asymmetrical load.

Description

Technical Field

[0001] This invention relates to the field of electromagnetic components, and more specifically to an adjustable reactor with a magnetic circuit structure. Background Technology

[0002] In existing power systems, three-phase reactors primarily utilize mechanical structures to adjust the number of turns to regulate inductance. This type of reactor is one of the earliest types of adjustable reactors. While this method of adjustment is easy to implement, it also suffers from problems such as susceptibility to mechanical failure, the potential for electrical sparks during adjustment, and the inability to achieve continuous and smooth inductance adjustment. Furthermore, existing structures are bulky, cumbersome, and have low safety and reliability.

[0003] Therefore, there is an urgent need for an adjustable reactor that is compact, smoothly adjustable, safe and reliable, and can adapt to different load conditions. Summary of the Invention

[0004] To address the aforementioned technical problems of traditional adjustable reactors, this invention proposes a magnetic circuit structure adjustable reactor to achieve continuous and smooth adjustment of the inductance value. In a three-phase power system, this reactor can be used for three-phase symmetrical loads to achieve the same output three-phase inductance value, and can also be used for three-phase asymmetrical loads by changing the wiring method to achieve the same output three-phase inductance value, thereby realizing filtering, current limiting, or reactive power compensation functions.

[0005] The technical solution adopted by the present invention to solve the above problems is as follows:

[0006] This invention proposes a magnetic circuit structure adjustable reactor, including a stator-moving element assembly. The stator-moving element assembly includes a stator, a coil, and a moving element core. The coil is arranged in the teeth of the stator. The moving element core is coaxially disposed in the cavity of the stator, and the number of teeth of the moving element core is the same as the number of teeth of the stator, and the positions of the teeth correspond to those of the moving element core. The lead screw adjustment assembly is connected to the moving core and is used to adjust the axial coupling length between the stator and the moving core, thereby changing the axial coupling area between the stator teeth and the moving teeth. Both the stator-moving assembly and the lead screw adjustment assembly are located inside the reactor housing.

[0007] Furthermore, the lead screw adjustment assembly includes a lead screw seat, a lead screw seat cover, and a lead screw. The lead screw seat is located inside the mover core and is fixedly connected to it. The lead screw seat cover is connected to the lead screw seat. The lead screw passes through the lead screw seat cover and is threadedly connected to the lead screw seat.

[0008] Furthermore, the stator has six teeth on its inner side, and each tooth has a coil.

[0009] Furthermore, each of the coils is wrapped with insulating paper on the outside.

[0010] Furthermore, the stator-mover assembly also includes a slot wedge, through which each coil is fixed.

[0011] Furthermore, the housing includes an outer shell, a top cover, and a bottom cover, the top cover and the bottom cover being fastened to both ends of the outer shell, respectively.

[0012] Furthermore, the inner wall of the housing is provided with a boss for mounting the stator, and the side wall of the housing is provided with an opening for leading out the coil wire.

[0013] Furthermore, the reactor also includes multiple guide rods, which are evenly distributed circumferentially. Each guide rod passes through the moving core, and both ends of each guide rod are connected to the top cover and the bottom cover, respectively.

[0014] Furthermore, each guide rod is fitted with an upper fastening spring and a lower fastening spring at both ends, with the lower fastening spring located between the moving core and the bottom cover; and the upper fastening spring located between the moving core and the top cover.

[0015] The beneficial effects of this invention are: 1. This invention designs the fit between the components and uses fastening bolts to connect the lead screw seat, lead screw seat cover, and mover core into a whole, making the structure compact. Then, the lead screw thread and the lead screw seat thread cooperate with each other, and the axial coupling area of ​​the stator teeth and the mover teeth can be adjusted by rotating the lead screw. Only a few parts are needed to achieve continuous and smooth adjustment of the inductance, and the inductance adjustment is simple.

[0016] 2. The circuit part (stator, coil, mover core) and the mechanical adjustment part (lead screw, lead screw seat, lead screw seat cover) of the reactor of the present invention are independent of each other and have no electrical connection, which avoids the generation of electric sparks during the online adjustment of inductance, and the inductance adjustment of the reactor is safe and reliable.

[0017] 3. This invention uses upper and lower fastening springs in the reactor to ensure that the coupling area between the moving teeth and stator teeth does not change when the reactor outputs a certain set inductance value. This avoids the fluctuation of the reactor output inductance value caused by changes in the coupling area between the moving teeth and stator teeth due to factors such as vibration of the external environment and electromagnetic interference of the reactor itself during use.

[0018] 4. The present invention forms a closed structure by means of the reactor top cover, bottom cover and outer shell, which isolates the internal components of the reactor from the external environment. The reactor has a good sealing effect and strong adaptability to the external environment.

[0019] 5. By adjusting the wiring method of the reactor, the reactor can output the same inductance value for all three phases regardless of whether the three-phase load is symmetrical. It can be used for filtering, current limiting or reactive power compensation for three-phase symmetrical loads, and can also be used for inductance adjustment characteristics for three-phase unbalanced loads. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the reactor of the present invention.

[0021] Figure 2 This is a structural diagram of the stator and mover parts of the reactor of the present invention.

[0022] Figure 3 This is a structural diagram of the lead screw adjustment part of the reactor of the present invention.

[0023] Figure 4 This is a structural diagram of the reactor housing end cap portion of the present invention.

[0024] Figure 5 This is a structural diagram of the auxiliary part of the reactor in this invention.

[0025] In the diagram, 1-bottom cover fastening bolt; 2-bottom cover; 3-lower fastening spring; 4-guide rod; 5-upper fastening spring; 6-stator; 7-coil; 8-insulating paper; 9-slot wedge; 10-lead screw seat; 11-moving core; 12-lead screw seat cover; 13-lead screw seat cover fastening bolt; 14-outer shell; 15-top cover; 16-top cover fastening bolt; 17-lead screw.

[0026] Figure 6 This is a diagram showing the arrangement of the reactor coil (Method 1).

[0027] Figure 7 This is a diagram showing the arrangement of the reactor coil (Method 2).

[0028] Among them, L1L2L3L4L5L6 are six coils of reactor; A1A2A3A4A5A6 represent the beginning of each coil; X1X2X3X4X5X6 represent the end of each coil.

[0029] Figure 8 Wiring diagram for reactors used with three-phase symmetrical loads.

[0030] Figure 9 This is the wiring diagram for a reactor used with a three-phase unbalanced load.

[0031] In this diagram, the letter A represents the current flowing into phase A, and the letter X represents the current flowing out of phase A. BY and CZ follow the same logic. The letters A1A2A3A4A5A6 represent the beginning of each coil, and the letters X1X2X3X4X5X6 represent the end of each coil. Detailed Implementation

[0032] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are merely some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0033] Example 1: This embodiment proposes a magnetic circuit structure adjustable reactor, such as... Figure 1 As shown, the reactor includes a stator-mover assembly, a lead screw adjustment assembly, and an auxiliary adjustment assembly, all of which are located inside the housing.

[0034] like Figure 2 As shown, the stator-moving element assembly includes a stator 6, coils 7, insulating paper 8, slot wedges 9, and a moving element core 11. The insulating paper 8 tightly wraps the coils 7 to ensure insulation between the coil conductors and the stator. Six coils 7 are respectively arranged on six teeth of the stator 6. A groove is provided between every two adjacent teeth of the stator 6. The six slot wedges 9 are respectively embedded in the corresponding grooves to abut against the coils 7, thereby fixing the coils 7. The moving element core 11 is coaxially arranged in the cavity of the stator 6, and the number of teeth of the moving element core 11 is the same as the number of teeth of the stator 6, and the tooth positions correspond accordingly.

[0035] Figure 6 and Figure 7 Two different coil arrangement methods are provided; you can choose either one. For example... Figure 6 As shown, the reactor has six coils L1L2L3L4L5L6. The beginning and end of coil L1 are represented by the letters A1 and X1, respectively. Similarly, the beginning and end of coils L2L3L4L5L6 are represented by the letters A2A3A4A5A6 and X2X3X4X5X6, respectively. Figure 7 Similarly.

[0036] like Figure 3 As shown, the lead screw adjustment assembly includes a lead screw seat 10, a lead screw seat cover 12, and a lead screw 17. The lead screw seat cover 12 has four through holes, and the lead screw seat 10 has four threaded holes. The lead screw seat 10 is fixed inside the moving core 11. The lead screw seat cover 12 and the lead screw seat 10 are fixedly connected by three lead screw seat cover fastening bolts 13. One end of the lead screw 17 passes sequentially through the central through hole of the top cover 15 of the housing, the central through hole of the lead screw seat cover 12, and the central threaded hole of the lead screw seat 10, and extends to the central hole of the bottom cover 2 of the housing. Rotating the lead screw 17 can adjust the axial coupling length between the stator 6 and the moving core 11, changing the axial coupling area between the stator teeth and the moving teeth, thereby achieving linear and smooth adjustment of the output inductance value of the reactor.

[0037] like Figure 4As shown, the housing includes an outer shell 14, a top cover 15, and a bottom cover 2. One end of the outer shell 14 is fastened to the top cover 15 by a top cover fastening bolt 16, and the other end is fastened to the bottom cover 2 by a bottom cover fastening bolt 1.

[0038] Preferably, the inner wall of the outer casing 14 is provided with a boss for cooperating with the stator 6, so that the stator 6 can be installed on the corresponding boss.

[0039] Preferably, the outer casing 14 has a square hole on its side wall for leading out the coil 7 wire.

[0040] like Figure 5 As shown, the auxiliary adjustment assembly includes an upper fastening spring 5, a lower fastening spring 3, and a guide rod 4. Multiple guide rods 4 are evenly distributed circumferentially, and each guide rod 4 passes through the moving iron core 11. The two ends of each guide rod 4 are connected to the top cover 15 and the bottom cover 2, respectively.

[0041] Preferably, there are three guide rods 4. The guide rods 4 can ensure that the six teeth of the mover core 11 are aligned with the stator teeth during the adjustment of the lead screw 17, so that the mover core 11 does not rotate along its circumference.

[0042] Preferably, each guide rod 4 has an upper fastening spring 5 and a lower fastening spring 3 respectively fitted at both ends. The lower fastening spring 3 is located between the moving core 11 and the bottom cover 2; the upper fastening spring 5 is located between the moving core 11 and the top cover 15. Specifically, the bottom cover 2, the top cover 15, and the moving core 11 are all provided with positioning holes that cooperate with the guide rod 4 and spring holes that cooperate with the springs. The positioning holes and spring holes are concentrically arranged but have different radii and depths. The lower fastening spring 3 is installed into the spring hole of the bottom cover 2. One end of the guide rod 4 passes through the three through holes of the moving core 11 and then passes through the lower fastening spring 3 to connect with the positioning hole of the bottom cover 2. The other end of the guide rod 4 is fitted with the upper fastening spring 5, and the upper fastening spring 5 is installed in the corresponding spring hole of the moving core 11. Adding a spring to the reactor ensures that the coupling area between the moving and stator teeth remains unchanged when the reactor outputs a set inductance value. This prevents fluctuations in the reactor's output inductance value caused by changes in the coupling area between the moving and stator teeth due to factors such as vibrations in the external environment and electromagnetic interference from the reactor itself.

[0043] Example 2: This example proposes a wiring and application method for an adjustable reactor with a magnetic circuit structure under a three-phase symmetrical load scenario. The specific wiring method is as follows: Figure 8 As shown in the diagram, A represents the current flowing into phase A, and X represents the current flowing out of phase A. BY and CZ are analogous. Coils L1 and L4 are connected in parallel as phase A connected to the external circuit; coils L2 and L5 are connected in parallel as phase B connected to the external circuit; and coils L3 and L6 are connected in parallel as phase C connected to the external circuit.

[0044] By rotating the lead screw and adjusting the axial coupling length between the stator 6 and the moving core 11, the axial coupling area between the stator teeth and the moving teeth can be changed, thereby continuously and linearly adjusting the inductance value of the reactor output.

[0045] Example 3: This example proposes a wiring and application method for an adjustable reactor with a magnetic circuit structure in a three-phase unbalanced load scenario: the specific wiring method is as follows. Figure 9 As shown in the diagram, A represents the current flowing into phase A, and X represents the current flowing out of phase A. BY and CZ are analogous. The two coils L1 and L2 are connected in reverse parallel to form phase A in the external circuit; the two coils L3 and L4 are connected in reverse parallel to form phase B in the external circuit; and the two coils L5 and L6 are connected in reverse parallel to form phase C in the external circuit.

[0046] By rotating the lead screw and adjusting the axial coupling length between the stator 6 and the moving core 11, the axial coupling area between the stator teeth and the moving teeth can be changed, thereby continuously and linearly adjusting the inductance value of the reactor output.

[0047] The adjustable reactor with magnetic circuit structure proposed in this invention can adjust the axial coupling length of the stator 6 and the mover by rotating the lead screw 17, thereby changing the axial coupling area of ​​the stator teeth and the mover teeth, and thus achieving linear and smooth adjustment of the reactor's output inductance value. At the same time, by changing the wiring method of the reactor coil, the reactor can output the same three-phase inductance value under both three-phase symmetrical load and three-phase asymmetrical load conditions.

[0048] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent substitutions, and improvements made to the above embodiments without departing from the scope of the present invention, based on the technical essence of the present invention and within the spirit and principles of the present invention, shall still fall within the protection scope of the present invention.

Claims

1. A magnetic circuit structure adjustable reactor, characterized by, include: The stator-moving component includes a stator (6), a coil (7), and a moving core (11). The coil (7) is arranged in the teeth of the stator (6). The moving core (11) is coaxially disposed in the cavity of the stator (6), and the number of teeth of the moving core (11) is the same as the number of teeth of the stator (6) and the tooth positions correspond to each other. The lead screw adjustment assembly is connected to the moving iron core (11) for adjusting the axial coupling length between the stator (6) and the moving iron core (11) and changing the axial coupling area between the stator teeth and the moving teeth. The stator-mover assembly and the lead screw adjustment assembly are both located inside the reactor housing.

2. The adjustable reactor with magnetic circuit structure according to claim 1, characterized in that, The lead screw adjustment assembly includes a lead screw seat (10), a lead screw seat cover (12), and a lead screw (17). The lead screw seat (10) is located inside the moving iron core (11) and is fixedly connected to it. The lead screw seat cover (12) is connected to the lead screw seat (10). The end of the lead screw (17) passes through the lead screw seat cover (12) and is threadedly connected to the lead screw seat (10).

3. The adjustable reactor with magnetic circuit structure according to claim 2, characterized in that, The stator (6) has six teeth on its inner side, and each tooth has a coil (7).

4. The adjustable reactor with magnetic circuit structure according to claim 3, characterized in that, Each of the coils (7) is wrapped with insulating paper (8) on the outside.

5. The adjustable reactor with magnetic circuit structure according to claim 4, characterized in that, The stator-mover assembly also includes a slot wedge (9), and each of the coils (7) is fixed by the slot wedge (9).

6. The adjustable reactor with magnetic circuit structure according to claim 5, characterized in that, The housing includes an outer shell (14), a top cover (15), and a bottom cover (2), wherein the top cover (15) and the bottom cover (2) are respectively fastened to both ends of the outer shell (14).

7. The adjustable reactor with magnetic circuit structure according to claim 6, characterized in that, The inner wall of the outer casing (14) is provided with a boss for mounting the stator (6), and the side wall of the outer casing (14) is provided with an opening for leading out the coil (7).

8. The adjustable reactor with magnetic circuit structure according to claim 7, characterized in that, The reactor also includes a plurality of guide rods (4), which are evenly distributed circumferentially, and each guide rod (4) passes through the moving iron core (11); the two ends of each guide rod (4) are respectively connected to the top cover (15) and the bottom cover (2).

9. The adjustable reactor with magnetic circuit structure according to claim 8, characterized in that, Each guide rod (4) is fitted with an upper fastening spring (5) and a lower fastening spring (3) at both ends. The lower fastening spring (3) is located between the moving iron core (11) and the bottom cover (2). The upper fastening spring (5) is located between the moving iron core (11) and the top cover (15).

Images