Tunable hollow inductor

Abstract

A tunable hollow inductor mainly comprises an outer coil frame, an inner coil frame, a rotary control table, an outer coil and an inner coil. The outer coil frame comprises an ellipsoidal keel frame, and outer coils are symmetrically wound on the left and right sides of the keel frame; the inner coil frame is in an ellipsoid shape and is coaxially arranged in an inner cavity of the keel frame, inner coils are wound on the inner coil frame in a left-right symmetry mode, and the inner coils and the outer coils are connected in series; and the rotary console drives the inner coil frame to rotate, so that the inner coil rotates. Mutual inductance is changed by controlling rotation of the inner coil so as to achieve continuous adjustment of inductance, the inner coil frame and the outer coil frame are both of a hollow structure, the coupling degree of the inner coil and the outer coil is increased to the maximum extent under the condition that the space size requirement is met, the inductance adjusting range is enlarged, and meanwhile the good heat dissipation characteristic is achieved.

Description

Technical Field

[0001] This utility model belongs to the field of tunable inductor technology, specifically relating to a tunable air-core inductor. Background Technology

[0002] In wireless communication devices, a tuning inductor is a device used for wireless communication and signal transmission and reception. It is an inductive element primarily used to adjust the resonant frequency of an antenna system to maximize signal transmission efficiency and reception performance. Different system operating frequencies require different inductance values ​​from the tuning inductor. Currently, the tuning inductors in communication systems are mainly linear tuning inductors, which consist of a small solenoid connected in series inside a large solenoid. The mutual inductance between the two solenoids is changed by the linear movement of the small solenoid in the axial direction, thus achieving continuous adjustment of the inductance. However, this type of tuning inductor has disadvantages such as large size and mass, and the tuning range of a linear tuning inductor is relatively small, making it inconvenient for integration. Utility Model Content

[0003] In order to solve the above-mentioned problems in the prior art, this utility model provides a tunable air-core inductor.

[0004] The technical problem to be solved by this utility model is achieved through the following technical solution:

[0005] A tunable hollow inductor includes a base, an outer coil frame, an inner coil frame, a rotary control console, an upper mandrel assembly, a lower mandrel assembly, an outer coil, and an inner coil. The outer coil frame includes a left wall plate, a right wall plate, and an ellipsoidal frame. The lower ends of the left and right wall plates are fixed to the base, and the frame is fixed between the upper ends of the left and right wall plates. The outer coil is symmetrically wound on the frame. The inner coil frame is ellipsoidal and coaxially arranged within the cavity of the frame. The inner coil is symmetrically wound on the frame, and the inner coil is connected in series with the outer coil. The upper mandrel assembly is vertical. The upper mandrel assembly is inserted through the center of the upper end of the keel frame and the inner coil frame, with its upper end fixedly connected to the keel frame and its lower end rotatably connected to the inner coil frame. The lower mandrel assembly is vertically inserted through the center of the lower end of the inner coil frame and the keel frame, with its upper end fixedly connected to the inner coil frame and rotatably connected to the keel frame. The rotating control console is mounted on the base, and the lower end of the lower mandrel assembly is connected to the rotating control console. The rotating control console drives the lower mandrel assembly to rotate, which in turn drives the inner coil frame to rotate, thus rotating the inner coil.

[0006] Furthermore, the keel frame consists of an upper main keel, a lower main keel, and multiple secondary keels fixed between the left and right wall panels, with the upper and lower main keels facing each other vertically; the inner coil frame consists of a left side panel, a right side panel, and an upper main support strip, a lower main support strip, and multiple secondary support strips fixed between the left and right side panels, with the upper and lower main support strips facing each other vertically; the upper end of the upper spindle assembly is fixedly connected to the upper main keel, and the lower end is rotatably connected to the upper main support strip; the upper end of the lower spindle assembly is fixedly connected to the lower main support strip and rotatably connected to the lower main keel.

[0007] Furthermore, both the upper and lower main keels have a first protrusion at the center of their outer sides, and the first protrusion has a first through hole at its center; both the upper and lower main support bars have a second protrusion at the center of their outer sides, and the second protrusion has a second through hole at its center; the upper mandrel assembly passes through the first through hole and the second through hole sequentially from top to bottom and is fixedly connected to the upper main keel and rotatably connected to the upper main support bar; the lower mandrel assembly passes through the second through hole and the first through hole sequentially from top to bottom and is fixedly connected to the lower main support bar and rotatably connected to the lower main keel.

[0008] Furthermore, each of the secondary keels has a third protrusion at the middle of its outer side, and each of the secondary support bars has a fourth protrusion at the middle of its outer side; the inner coil is symmetrically wound around the second and fourth protrusions on the left and right sides, and the outer coil is symmetrically wound around the first and third protrusions on the left and right sides.

[0009] The beneficial effects of this utility model are:

[0010] 1. This utility model changes the mutual inductance by controlling the rotation of the inner coil to achieve continuous and adjustable inductance; the rotation angle of the inner coil can be controlled by the host computer to achieve continuous and linear adjustment of the inductance, which is used to adjust the resonant frequency of the antenna system, thereby maximizing signal transmission efficiency and receiving performance.

[0011] 2. The inner and outer coil frames of this utility model are both hollow structures, with an ellipsoidal shape. While ensuring the space size requirements, it maximizes the coupling degree between the inner and outer coils, increases the inductance adjustment range, and has good heat dissipation characteristics. Attached Figure Description

[0012] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0013] Figure 2 This is a three-dimensional exploded structural diagram of the present invention;

[0014] Figure 3 This is a three-dimensional structural diagram of the outer coil frame of this utility model;

[0015] Figure 4 This is a three-dimensional structural diagram of the inner coil frame of this utility model;

[0016] Figure 5 This is a schematic diagram of the installation of the upper and lower mandrel assemblies of this utility model;

[0017] Figure 6 This is a three-dimensional structural diagram of the upper mandrel assembly of this utility model;

[0018] Figure 7 This is a three-dimensional structural diagram of the lower mandrel assembly of this utility model.

[0019] Reference numerals: Base 1, Outer coil frame 2, Left wall plate 2-1, Right wall plate 2-2, Inner coil frame 3, Left side plate 3-1, Right side plate 3-2, Upper main support bar 3-3, Lower main support bar 3-4, Secondary support bar 3-5, Secondary boss 3-6, Secondary through hole 3-7, Fourth boss 3-8, Rotary control console 4, Upper spindle assembly 5, Upper spindle core 5-1, First bearing assembly 5-2, First fixing plate 5-3, Lower spindle assembly 6, Lower spindle core 6-1, Secondary bearing assembly 6-2, Secondary fixing plate 6-3, Outer coil 7, Inner coil 8, Keel frame 9, Upper main keel 9-1, Lower main keel 9-2, Secondary keel 9-3, First boss 9-4, First through hole 9-5, Third boss 9-6. Detailed Implementation

[0020] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments, but the implementation of the present invention is not limited thereto.

[0021] Combination Figure 1 , Figure 2 , Figure 3As shown, this utility model includes a base 1, an outer coil frame 2, an inner coil frame 3, a rotating control console 4, an upper mandrel assembly 5, a lower mandrel assembly 6, an outer coil 7, and an inner coil 8. The outer coil frame 2 includes a left wall plate 2-1, a right wall plate 2-2, and an ellipsoidal frame 9. The lower ends of the left wall plate 2-1 and the right wall plate 2-2 are fixed to the base 1, and the frame 9 is fixed between the upper ends of the left wall plate 2-1 and the right wall plate 2-2. The outer coil 7 is symmetrically wound on the left and right sides of the frame 9. The inner coil frame 3 is ellipsoidal and coaxially arranged in the inner cavity of the frame 9. The inner coil 8 is symmetrically wound on the left and right sides of the inner coil frame 3, and the inner coil 8 is connected in series with the outer coil 7. The upper mandrel assembly 5 is vertically inserted through the center of the upper end of the keel frame 9 and the inner coil frame 3, with the upper end of the upper mandrel assembly 5 fixedly connected to the keel frame 9 and the lower end rotatably connected to the inner coil frame 3; the lower mandrel assembly 6 is vertically inserted through the center of the lower end of the inner coil frame 3 and the keel frame 9, with the upper end of the lower mandrel assembly 6 fixedly connected to the inner coil frame 3 and rotatably connected to the keel frame 9; the rotating control console 4 is mounted on the base 1, and the lower end of the lower mandrel assembly 6 is connected to the rotating control console 4. The rotating control console 4 drives the lower mandrel assembly 6 to rotate, which in turn drives the inner coil frame 3 to rotate, thus rotating the inner coil 8.

[0022] Combination Figure 3 , Figure 4 , Figure 5 As shown, the keel frame 9 is composed of an upper main keel 9-1, a lower main keel 9-2, and multiple secondary keels 9-3 fixed between the left wall panel 2-1 and the right wall panel 2-2, with the upper main keel 9-1 and the lower main keel 9-2 arranged vertically opposite each other; the inner coil frame 3 is composed of a left side panel 3-1, a right side panel 3-2, and an upper main support strip 3-3, a lower main support strip 3-4, and multiple secondary support strips 3-5 fixed between the left side panel 3-1 and the right side panel 3-2, with the upper main support strip 3-3 and the lower main support strip 3-4 arranged vertically opposite each other.

[0023] Combination Figure 3 , Figure 4 , Figure 5As shown, the upper main keel 9-1 and the lower main keel 9-2 each have a first boss 9-4 at the center of their outer sides, and the first boss 9-4 has a first through hole 9-5 at its center; the upper main support bar 3-3 and the lower main support bar 3-4 each have a second boss 3-6 at the center of their outer sides, and the second boss 3-6 has a second through hole 3-7 at its center; the upper mandrel assembly 5 passes through the first through hole 9-5 and the second through hole 3-7 sequentially from top to bottom and is fixedly connected to the upper main keel 9-1 and rotatably connected to the upper main support bar 3-3; the lower mandrel assembly 6 passes through the second through hole 3-7 and the first through hole 9-5 sequentially from top to bottom and is fixedly connected to the lower main support bar 3-4 and rotatably connected to the lower main keel 9-2.

[0024] Combination Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, each of the secondary keels 9-3 has a third protrusion 9-6 on the outer middle, and each of the secondary support bars 3-5 has a fourth protrusion 3-8 on the outer middle; the inner coil 8 is symmetrically wound on the left and right sides of the second protrusion 3-6 and the fourth protrusion 3-8, and the outer coil 7 is symmetrically wound on the left and right sides of the first protrusion 9-4 and the third protrusion 9-6.

[0025] like Figure 6 As shown, the upper spindle assembly 5 includes an upper spindle core 5-1 and a first bearing assembly 5-2 fitted on the lower end of the upper spindle core 5-1. The upper end of the upper spindle core 5-1 has a first fixing plate 5-3. The first fixing plate 5-3 is fixedly connected to the first boss 9-4 at the center of the outer side of the upper main keel 9-1 by bolts. The lower end of the upper spindle core 5-1 is rotatably connected to the upper main support bar 3-3 through the first bearing assembly 5-2.

[0026] like Figure 7 As shown, the lower spindle assembly 6 includes a lower spindle 6-1 and a second bearing assembly 6-2 fitted on the lower spindle 6-1. The upper end of the lower spindle 6-1 has a second fixing plate 6-3. The second fixing plate 6-3 is fixedly connected to the lower main support bar 3-4 by bolts. The upper end of the lower spindle 6-1 is rotatably connected to the lower main keel 9-2 through the second bearing assembly 6-2.

[0027] It should be noted that the rotary control console 4 is existing technology, consisting of a turntable mechanism, servo motor, servo driver, rotary encoder, limit microswitches, fiber optic communication interface board, servo control software, etc. The turntable mechanism can be controlled to rotate from 0° to 180° via fiber optic communication. The turntable mechanism drives the lower spindle assembly 6 to rotate, which in turn drives the inner coil frame 3 to rotate, thereby controlling the inner coil 8 to rotate from 0° to 180°, thus achieving continuous and nearly linear adjustment of the inductance.

[0028] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the protection scope of the present invention.

Claims

1. A tunable air-core inductor, characterized in that: The system includes a base (1), an outer coil frame (2), an inner coil frame (3), a rotating control console (4), an upper mandrel assembly (5), a lower mandrel assembly (6), an outer coil (7), and an inner coil (8). The outer coil frame (2) includes a left wall plate (2-1), a right wall plate (2-2), and an ellipsoidal keel frame (9). The lower ends of the left wall plate (2-1) and the right wall plate (2-2) are fixed to the base (1). The keel frame (9) is fixed between the upper ends of the left wall plate (2-1) and the right wall plate (2-2), and the outer coil (7) is symmetrically wound on the left and right sides of the keel frame (9). The inner coil frame (3) is ellipsoidal and coaxially arranged in the inner cavity of the keel frame (9). The inner coil frame (3) is symmetrically wound on the left and right sides of the inner coil frame (3), and the inner coil (8) is connected in series with the outer coil (7). The upper mandrel assembly (5) is vertically inserted through the center of the upper end of the keel frame (9) and the inner coil frame (3), and the upper end of the upper mandrel assembly (5) is fixedly connected to the keel frame (9) and the lower end is rotatably connected to the inner coil frame (3); the lower mandrel assembly (6) is vertically inserted through the center of the lower end of the inner coil frame (3) and the keel frame (9), and the upper end of the lower mandrel assembly (6) is fixedly connected to the inner coil frame (3) and rotatably connected to the keel frame (9); the rotating control console (4) is set on the base (1), and the lower end of the lower mandrel assembly (6) is connected to the rotating control console (4). The rotating control console (4) drives the lower mandrel assembly (6) to rotate, and then the lower mandrel assembly (6) drives the inner coil frame (3) to rotate, so that the inner coil (8) rotates.

2. A tunable air-core inductor according to claim 1, characterized in that, The keel frame (9) consists of an upper main keel (9-1), a lower main keel (9-2), and multiple secondary keels (9-3) fixed between the left wall panel (2-1) and the right wall panel (2-2), with the upper main keel (9-1) and the lower main keel (9-2) arranged vertically opposite each other; the inner coil frame (3) consists of a left side panel (3-1), a right side panel (3-2), and an upper main support strip fixed between the left side panel (3-1) and the right side panel (3-2). The upper main support (3-3), the lower main support (3-4), and multiple secondary support (3-5) are arranged with the upper main support (3-3) and the lower main support (3-4) facing each other vertically; the upper end of the upper mandrel assembly (5) is fixedly connected to the upper main keel (9-1), and the lower end is rotatably connected to the upper main support (3-3); the upper end of the lower mandrel assembly (6) is fixedly connected to the lower main support (3-4), and rotatably connected to the lower main keel (9-2).

3. A tunable air-core inductor according to claim 2, characterized in that, The upper main keel (9-1) and the lower main keel (9-2) each have a first boss (9-4) at the center of their outer sides, and the first boss (9-4) has a first through hole (9-5) at the center of its center; the upper main support bar (3-3) and the lower main support bar (3-4) each have a second boss (3-6) at the center of their outer sides, and the second boss (3-6) has a second through hole (3-7) at the center of its center; the upper mandrel assembly (5) passes through the first through hole (9-5) and the second through hole (3-7) sequentially from top to bottom and is fixedly connected to the upper main keel (9-1) and rotatably connected to the upper main support bar (3-3); the lower mandrel assembly (6) passes through the second through hole (3-7) and the first through hole (9-5) sequentially from top to bottom and is fixedly connected to the lower main support bar (3-4) and rotatably connected to the lower main keel (9-2).

4. A tunable air-core inductor according to claim 3, characterized in that, The secondary keel (9-3) has a third protrusion (9-6) on the middle of its outer side, and the secondary support bar (3-5) has a fourth protrusion (3-8) on the middle of its outer side; the inner coil (8) is symmetrically wound on the left and right sides of the second protrusion (3-6) and the fourth protrusion (3-8), and the outer coil (7) is symmetrically wound on the left and right sides of the first protrusion (9-4) and the third protrusion (9-6).

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