A variable inductor with continuously adjustable inductance

Abstract

The present invention provides a variable inductor with continuously adjustable inductance, comprising a first variable inductor and a second variable inductor, wherein the first variable inductor comprises an inductance coil; the second variable inductor comprises a spherical variable inductor, wherein the spherical variable inductor comprises a rotor core, a rotor coil, a stator core, a stator coil, a rotor bracket and a stator bracket, wherein the rotor core is spherical, the rotor coil is wound on the spherical surface of the rotor core, the stator core is hollow spherical, the stator coil is wound on the spherical surface of the stator core, and the rotor core is installed in the stator core; the first variable inductor and the second variable inductor are connected in series, and the inductance of the second variable inductor is greater than the maximum value of the inductance difference of each segment of the inductance coil separated by the tap of the first variable inductor, and greater than the minimum inductance of each segment of the inductance coil of the first variable inductor. Continuous adjustable inductance in multiple ranges is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of variable inductors, and in particular to a variable inductor with continuously adjustable inductance. Background Art

[0002] The existing loading coil can realize variable adjustment of inductance, but it can only be intermittent adjustment, and cannot realize continuous adjustment of inductance. The existing spherical variable inductor can realize continuous adjustment of inductance within a certain range, but it can only realize continuous adjustment of inductance within a range. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a variable inductor with continuously adjustable inductance, so as to realize continuous adjustment of the inductance within various ranges.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0005] A variable inductor with continuously adjustable inductance, comprising a first variable inductor and a second variable inductor, wherein the first variable inductor comprises an inductance loading coil, wherein the inductance loading coil comprises at least one tap; the second variable inductor comprises a spherical variable inductor, wherein the spherical variable inductor comprises a rotor core, a rotor coil, a stator core, a stator coil, a rotor bracket and a stator bracket, wherein the rotor core is spherical, wherein the spherical surface of the rotor core is provided with a spiral first groove, wherein the rotor coil is wound in the first groove, wherein the stator core is hollow spherical, wherein the spherical surface of the stator core is provided with a spiral second groove, wherein the stator coil is wound in the second groove, wherein the rotor core is installed in a In the stator core, the center of the rotor core coincides with the center of the stator core, two first fixing rods symmetrically extending outward are provided on one diameter of the rotor core, two first through holes symmetrically are provided on one diameter of the stator core, the first fixing rod passes through the first through hole, the first fixing rod is rotatably connected to the rotor bracket, and the stator core is fixedly connected to the stator bracket; the first variable inductor and the second variable inductor are connected in series, the inductance of the second variable inductor is greater than the maximum value of the inductance difference among the sections of the inductance coils of the first variable inductor separated by the tap, and is greater than the minimum inductance among the sections of the inductance coils of the first variable inductor.

[0006] Furthermore, the first variable inductor also includes a coil skeleton, the inductance coil is wound on the coil skeleton, and the coil skeleton is provided with a plurality of wire-holding protrusions arranged side by side in the circumferential direction, the distance between adjacent wire-holding protrusions is adapted to the diameter of the inductance coil, the height and width of the wire-holding protrusions are both smaller than the diameter of the inductance coil, each of the wire-holding protrusions is provided with a wiring clearance opening, the inductance coils are staggered and stacked in two layers on the coil skeleton, the inductance coils located on the bottom layer are wound on both sides of the wire-holding protrusions, and the inductance coils located on the top layer are wound close to and between two adjacent turns of the inductance coils located on the bottom layer, and when winding, each layer of the inductance coils jumps from one side of a wire-holding protrusion to the other side at the wiring clearance opening.

[0007] Furthermore, each of the wire-holding protrusions is provided with a wire-blocking protrusion, the height of the wire-blocking protrusion is greater than or equal to twice the diameter of the loading coil, the wire-blocking protrusion is connected to the wiring clearance opening, and the wire-blocking protrusion is located at the front end of the wiring clearance opening along the winding direction.

[0008] Furthermore, when winding the loading coil, the odd-numbered turns starting from the third turn are wound on the top layer, and the other turns are wound on the bottom layer.

[0009] Furthermore, the coil skeleton is provided with an inner hole and a tap wire clamping hole, the tap wire clamping hole is communicated with the inner hole, and two tap wire clamping holes are correspondingly arranged at each tap. During winding, the tap first extends from the outside of the coil skeleton through one of the tap wire clamping holes to the inner hole, and then passes from the inner hole through the other tap wire clamping hole to the outside of the coil skeleton; the end of the coil skeleton is also provided with a coil starting wire clamping hole and a coil ending wire clamping hole. During winding, the starting end of the inductive coil extends from the inner hole through the coil starting wire clamping hole to the outside of the coil skeleton, and the ending end of the inductive coil extends from the outside of the coil skeleton through the coil ending wire clamping hole into the inner hole.

[0010] Furthermore, the rotor core is a hollow structure, and the first fixing rod is provided with a second through hole as a threading hole, the second through hole is connected to the inner cavity of the rotor core, and the rotor core is provided with two wiring holes, one end of the rotor coil extends into the inner cavity of the rotor core from one of the wiring holes, and then extends out from one of the second through holes of the first fixing rod, and the other end extends into the inner cavity of the rotor core from the other wiring hole, and then extends out from the other second through hole of the first fixing rod.

[0011] Furthermore, the rotor core is two symmetrically arranged hemispherical rotor cores, and the two hemispherical rotor cores are provided with tenons and grooves for locking connection at the butt surfaces.

[0012] Furthermore, the stator core is two symmetrical hollow hemispherical stator cores, and the two hollow hemispherical stator cores are provided with fixing blocks extending outward along the diameter at the mating surface, and the fixing blocks are provided with corresponding third through holes, and the screws pass through the third through holes of the two hollow hemispherical stator cores and are threadedly connected with the nuts.

[0013] Furthermore, the second variable inductor also includes a stepper motor, an elastic coupling, a rocker arm and two limit switches, the output shaft of the stepper motor is fixedly connected to one of the first fixed rods through the elastic coupling, one end of the rocker arm is fixedly connected to the other first fixed rod, and the other end touches the two limit switches at two extreme positions respectively, and the rocker arm swings back and forth within a range of 180° in the circumferential direction.

[0014] Furthermore, the second variable inductor also includes a rotor connecting shaft and a brush, the rotor connecting shaft is connected to the first fixing rod of the rotor core, the brush includes a copper bearing, a mounting plate, a spring and a wire, the outer ring of the copper bearing is fixed to the rotor bracket, the inner ring of the copper bearing is sleeved on the rotor connecting shaft, the mounting plate is fixed to the rotor bracket, the two ends of the spring are horizontal sections, and the middle is a circular arc section, the horizontal sections at both ends of the spring are fixed to the mounting plate, the outer cylindrical surface of the circular arc section in the middle of the spring is pressed against the outer cylindrical surface of the rotor connecting shaft, one end of the wire is connected to the spring, and the other end is connected to the copper bearing, one end of the stator coil is electrically connected to the brush, and one end of the rotor coil is electrically connected to the brush through the rotor connecting shaft.

[0015] The beneficial effects of the present invention are as follows: the loading coil realizes segmented change of inductance, realizes jump-type adjustment of inductance, the spherical variable inductor realizes continuous adjustment of inductance, the spherical variable inductor is connected in series with the loading coil to realize multiple adjustment modes of inductance, and the inductance of the spherical variable inductor is greater than the maximum value of the difference of inductance in each segment of the loading coil separated by the tap of the first variable inductor, and greater than the minimum inductance in each segment of the loading coil of the first variable inductor, thereby realizing continuous adjustment within multiple ranges. When in use, the first variable inductor can be used for coarse adjustment setting, and the spherical variable inductor can be used for fine adjustment setting. The fine adjustment setting is convenient for adjusting the inductance, and the inductance has higher precision and a wider range of applications. The rotor core is located in the hollow stator core, and the rotor coil is wound in a single continuous spiral in the first groove, and the stator coil is wound in a single continuous spiral in the second groove, so that the continuity of the rotor coil and the stator coil is maintained, and the stator coil and the rotor coil are wound according to a preset trajectory. The lengths of the rotor coil and the stator coil are constant, which is convenient for manual winding, and the inductance precision of the rotor coil and the stator coil is high during manual batch winding. The two first fixing rods of the rotor core extend out of the two first through holes of the stator core, so that the rotor core can be installed in the hollow stator core. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram of a variable inductor with continuously adjustable inductance according to an embodiment of the present invention;

[0017] Figure 2 A specific application principle diagram of a variable inductor with continuously adjustable inductance according to an embodiment of the present invention;

[0018] Figure 3 A three-dimensional diagram of a first variable inductor of a variable inductor with continuously adjustable inductance according to an embodiment of the present invention;

[0019] Figure 4 An exploded diagram of a first variable inductor of a variable inductor with continuously adjustable inductance according to an embodiment of the present invention;

[0020] Figure 5 The variable inductor with continuously adjustable inductance according to the embodiment of the present invention Figure 4 A partial enlarged view of;

[0021] Figure 6 A schematic diagram of winding the loading coil of the first variable inductor of the variable inductor with continuously adjustable inductance according to an embodiment of the present invention;

[0022] Figure 7 A three-dimensional diagram of a second variable inductor of the variable inductor with continuously adjustable inductance according to an embodiment of the present invention;

[0023] Figure 8 A front view of a second variable inductor of the variable inductor with continuously adjustable inductance according to an embodiment of the present invention;

[0024] Fig. 9 A left side view of a second variable inductor of the variable inductor with continuously adjustable inductance according to an embodiment of the present invention;

[0025] Fig.10 An exploded diagram of a stator core and a rotor core of a second variable inductor of a variable inductor with continuously adjustable inductance according to an embodiment of the present invention;

[0026] Fig.11 An exploded diagram of a rotor core of a second variable inductor of a variable inductor with continuously adjustable inductance according to an embodiment of the present invention;

[0027] Fig.12 A front view of the connection between the brush of the second variable inductor and the rotor connecting shaft of the variable inductor with continuously adjustable inductance according to an embodiment of the present invention;

[0028] Fig.13 It is a left side view of the connection between the brush of the second variable inductor and the rotor connecting shaft of the variable inductor with continuously adjustable inductance according to the embodiment of the present invention;

[0029] Fig.14 The figure is an exploded view of a brush of a second variable inductor of a variable inductor with continuously adjustable inductance according to an embodiment of the present invention.

[0030] Description of labels:

[0031] 1. a first variable inductor; 2. a second variable inductor;

[0032] 11. Coil skeleton; 12. Loading coil;

[0033] 111, wire clamping protrusion; 112, inner hole; 113, tap wire clamping hole; 114, coil starting wire clamping hole; 115, coil ending wire clamping hole; 116, tubular skeleton; 117, end cover; 118, limit protrusion;

[0034] 1111, opening for making way for wiring; 1112, protrusion for blocking wires; 1113, opening for making way for tapping;

[0035] 121. Tap;

[0036] 21. Spherical variable inductor; 22. Stepper motor; 23. Elastic coupling; 24. Rotor connecting shaft; 25. Brush; 26. Rocker; 27. Limit switch;

[0037] 211, rotor core; 212, stator core; 213, rotor bracket; 214, stator bracket;

[0038] 2111, first groove; 2112, first fixing rod; 2113, wiring hole; 2114, hemispherical rotor core; 2115, tenon; 2116, slot;

[0039] 21121, second through hole;

[0040] 2121, second groove; 2122, first through hole; 2123, hollow hemispherical stator core; 2124, fixing block; 2125, second fixing rod;

[0041] 21241, third through hole;

[0042] 251. Copper bearing; 252. Mounting plate; 253. Shrapnel; 254. Wire. DETAILED DESCRIPTION

[0043] In order to explain the technical content, achieved objectives and effects of the present invention in detail, the following is an explanation in conjunction with the implementation modes and the accompanying drawings.

[0044] Please refer to Figures 1 to 14 , Embodiment 1 provided by the present invention is:

[0045] A variable inductor with continuously adjustable inductance, comprising a first variable inductor 1 and a second variable inductor 2, wherein the first variable inductor 1 comprises an inductance loading coil 12, wherein the inductance loading coil 12 comprises at least one tap 121; the second variable inductor 2 comprises a spherical variable inductor 21, wherein the spherical variable inductor 21 comprises a rotor core 211, a rotor coil, a stator core 212, a stator coil, a rotor support 213 and a stator support 214, wherein the rotor core 211 is spherical, wherein the spherical surface of the rotor core 211 is provided with spiral first grooves 2111, wherein the rotor coil is wound in the first grooves 2111, wherein the stator core 212 is hollow spherical, wherein the spherical surface of the stator core 212 is provided with spiral second grooves 2121, wherein the stator coil is wound in the second grooves 2121, wherein the rotor core 211 is installed In the stator core 212, the center of the rotor core 211 coincides with the center of the stator core 212, two first fixing rods 2112 symmetrically extending outward are provided on one diameter of the rotor core 211, two first through holes 2122 symmetrically are provided on one diameter of the stator core 212, the first fixing rods 2112 pass through the first through holes 2122, the first fixing rods 2112 are rotatably connected to the rotor bracket 213, and the stator core 212 is fixedly connected to the stator bracket 214; the first variable inductor 1 and the second variable inductor 2 are connected in series, and the inductance of the second variable inductor 2 is greater than the maximum value of the difference in inductance of each segment of the inductance coil 12 of the first variable inductor 1 separated by the tap 121, and greater than the minimum inductance of each segment of the inductance coil 12 of the first variable inductor 1.

[0046] The spherical variable inductor 21 is connected in series with the loading coil 12 to realize multiple ways of adjusting the inductance. For example, assuming that the loading coil 12 realizes two-stage segmental changes in inductance, which are 200mH and 500mH respectively, and the inductance of the spherical variable inductor 21 is 300mH, then the variable inductor can realize jump-type coarse adjustment of the inductance between 200mH and 500mH, and can also realize fine adjustment within the ranges of 0-300, 200-500, 500-800, and 700-1000. In general, continuous adjustment within the range of 0-1000 can be realized, thereby facilitating the adjustment of the inductance and making the variable inductor have a wider range of applications.

[0047] The rotor core 211 can be hollow or solid. The rotor coil is wound according to the preset track of the first groove 2111. The rotor core 211 is located in the stator core 212. The stator coil is wound according to the preset track of the second groove 2121. During installation, the rotor core 211 with the rotor coil wound is placed in the hollow stator core 212, and the two fixing rods extend out of the two first through holes 2122. Then the stator core 212 is fixed, and the stator coil is wound on the stator core 212. Finally, the stator core 212 is fixedly installed on the stator bracket 214, and the rotor core 211 is rotatably installed on the rotor bracket 213, so that the rotor coil and the stator coil are both kept in a single continuous winding, and the winding length and track are fixed, thereby ensuring the accuracy of the inductance of the spherical variable inductor 21 and facilitating manual winding.

[0048] Furthermore, the width of the first groove 2111 is adapted to the diameter of the rotor coil, and the width of the second groove 2121 is adapted to the diameter of the stator coil. Specifically, there is an interference fit between the width of the first groove 2111 and the diameter of the rotor coil, and there is an interference fit between the width of the second groove 2121 and the diameter of the stator coil, thereby facilitating winding of the rotor coil and the stator coil with high winding accuracy.

[0049] Preferably, the cross-sectional shape of the first groove 2111 is rectangular, semicircular or U-shaped, which is convenient for winding the rotor coil; the cross-sectional shape of the second groove 2121 is rectangular, semicircular or U-shaped, which is convenient for winding the stator coil.

[0050] The second embodiment provided by the present invention is:

[0051] On the basis of the first embodiment, further, the first variable inductor 1 also includes a coil skeleton 11, the inductance coil 12 is wound on the coil skeleton 11, and the coil skeleton 11 is provided with a plurality of wire-holding protrusions 111 arranged side by side in the circumferential direction, the distance between adjacent wire-holding protrusions 111 is adapted to the diameter of the inductance coil 12, the height and width of the wire-holding protrusions 111 are both smaller than the diameter of the inductance coil 12, each of the wire-holding protrusions 111 is provided with a wiring clearance opening 1111, the inductance coils 12 are staggered and stacked in two layers on the coil skeleton 11, the inductance coils 12 located on the bottom layer are wound on both sides of the wire-holding protrusions 111, and the inductance coils 12 located on the top layer are wound close to the two adjacent turns of the inductance coils 12 located on the bottom layer, and during winding, each layer of the inductance coils 12 jumps from one side of a wire-holding protrusion 111 to the other side at the wiring clearance opening 1111.

[0052] Adjacent wire-holding protrusions 111 are interference-fitted with the loading coils 12, so that the wire-holding protrusions 111 can position the loading coils 12 and facilitate the installation of the loading coils 12. The loading coils 12 located at the bottom layer and the loading coils 12 located at the top layer are both wound from the current circle to the next circle at the wiring clearance opening 1111, so that the winding of the loading coils 12 is more regular and the inductance control accuracy is higher. Furthermore, the wire-holding protrusions 111 are a continuous multi-semicircular arc protrusion, or are composed of a plurality of intermittent less semicircular arc protrusions, which are easy to process.

[0053] Preferably, the shape between adjacent wire-holding protrusions 111 is rectangular, semicircular or U-shaped, which is convenient for winding the loading coil 12 .

[0054] The loading coil 12 includes at least one tap 121. Only one loading coil 12 can be placed between adjacent wire-holding protrusions 111. The loading coil 12 at the bottom layer is wound on both sides of the wire-holding protrusions 111. The loading coil 12 at the top layer is wound between two adjacent turns of the loading coil 12 at the bottom layer. The loading coil 12 is positioned by the two adjacent turns of the loading coil 12. Therefore, during the manual winding process, the winding position and length of the loading coil 12 are fixed, and there is no need to manually count the number of turns, thereby improving the efficiency of manual winding, and the inductance accuracy is high, which is convenient for manual batch production.

[0055] The third embodiment provided by the present invention is:

[0056] On the basis of the second embodiment, further, each of the wire-holding protrusions 111 is provided with a wire-blocking protrusion 1112, the height of the wire-blocking protrusion 1112 is greater than or equal to twice the diameter of the inductor coil 12, the wire-blocking protrusion 1112 is connected to the wiring clearance opening 1111, and the wire-blocking protrusion 1112 is located at the front end of the wiring clearance opening 1111 along the winding direction.

[0057] The wire blocking protrusion 1112 can not only position the loading coil 12 located on the bottom layer, but also position the loading coil 12 located on the top layer, thereby further improving the winding accuracy of the loading coil 12 in length, and also facilitating the accurate positioning of the loading coil 12 located on the top layer during the manual winding process of the loading coil 12, thereby facilitating manual batch production.

[0058] Preferably, the cross-sectional shape of the wire blocking protrusion 1112 and the wire clamping protrusion 111 is the same, but the wire blocking protrusion 1112 is higher than the wire clamping protrusion 111, which is convenient for processing and manufacturing.

[0059] The fourth embodiment provided by the present invention is:

[0060] On the basis of the second embodiment, further, when winding the inductive coil 12, the odd turns starting from the third turn are wound on the top layer, and the other turns are wound on the bottom layer. That is, in the process of winding the inductive coil 12, the first and second turns are wound on the bottom layer, the third turn is wound on the top layer, the fourth turn is wound on the bottom layer, the fifth turn is wound on the top layer, and so on, until the number of turns is reached, and the inductive coil 12 is wound closely. If a total of 11 turns are wound, please refer to Figure 6 The 1st, 2nd, 4th, 6th, 8th, and 10th turns are located at the bottom layer, and the 3rd, 5th, 7th, 9th, and 11th turns are located at the top layer. The coils are wound in numerical sequence.

[0061] Embodiment 5 provided by the present invention is:

[0062] On the basis of the second embodiment, further, it also includes a binding tape, the coil skeleton 11 is provided with an inner hole 112 and a tap wire clamping hole 113, the tap wire clamping hole 113 is communicated with the inner hole 112, and two tap wire clamping holes 113 are correspondingly provided at each tap 121. When winding, the binding tape passes through the two tap wire clamping holes 113 and binds the tap 121; the end of the coil skeleton 11 is also provided with a coil starting wire clamping hole 114 and a coil ending wire clamping hole 115, the coil starting clamping hole 114 is provided with a coil starting wire clamping hole 114, and the coil ending wire clamping hole 115 is provided with a coil starting wire clamping hole 114. The wire hole 114 and the coil terminal wire clamping hole 115 are both connected to the inner hole 112 of the coil skeleton 11, and the inner hole 112 of the coil skeleton 11 is connected to its two ends. During winding, a binding strap passes through the coil starting wire clamping hole 114, the inner hole 112 and one end of the coil skeleton 11, and binds the starting end of the inductive coil 12, and another binding strap passes through the coil terminal wire clamping hole 115, the inner hole 112 and the other end of the coil skeleton 11, and binds the terminal end of the inductive coil 12.

[0063] Specifically, the tap wire clamping holes 113 are arranged on the outer side of the coil frame 11. The two tap wire clamping holes 113 are convenient for threading a binding strap, thereby realizing the positioning of the tap 121 of the inductance coil 12, thereby further improving the accuracy of the inductance of the inductance coil 12 during the manual winding process.

[0064] The starting end and the ending end of the inductive coil 12 are positioned respectively through the coil starting wire clamping hole 114 and the coil ending wire clamping hole 115, so as to realize positioning of both ends of the inductive coil 12 and further ensure the length of the inductive coil 12 during the winding process.

[0065] Furthermore, a plurality of the wire-holding protrusions 111 are aligned with each other to form a tap-out opening 1113 , and the tap-holding hole 113 is located at the tap-out opening 1113 .

[0066] Preferably, the bottom of the tap-out opening 1113 is flush with the outer circumferential surface of the coil skeleton 11 .

[0067] The tap openings 1113 aligned on the plurality of wire-holding protrusions 111 are embodied as a smooth arc surface of a certain width on the coil skeleton 11 , which facilitates the processing of the tap wire-holding holes 113 and the further installation of heat shrink tubing on the tap 121 .

[0068] Furthermore, the coil frame 11 is cylindrical, including a tubular frame 116 and two end covers 117, and the two end covers 117 are respectively fixed at two ends of the tubular frame 116. This makes the coil frame 11 light and easy to process.

[0069] The sixth embodiment provided by the present invention is:

[0070] On the basis of the second embodiment, the wiring openings 1111 on the plurality of wire clamping protrusions 111 are further aligned and arranged to form a smooth arc surface with a certain width on the coil skeleton 11, which is convenient for processing the coil skeleton 11 and also makes the winding of the inductor coil 12 more regular.

[0071] Furthermore, a circle of limiting protrusions 118 are respectively provided at both ends of the coil skeleton 11, and the height of the limiting protrusions 118 is greater than or equal to 1.5 times the diameter of the inductive coil 12, and the distance between the limiting protrusions 118 and the adjacent wire clamping protrusions 111 is adapted to the diameter of the inductive coil 12. The limiting protrusions 118 at both ends of the coil skeleton 11 are used to position the inductive coils 12 at both ends, thereby preventing the inductive coils 12 at both ends from becoming loose, and also improving the structural strength of the coil skeleton 11, so as to facilitate gripping of the coil skeleton 11.

[0072] The distance between the limiting protrusion 118 and the adjacent wire-holding protrusion 111 is interference-fitted with the diameter of the loading coil 12. Structurally, each section of the loading coil 12 of the variable inductor provided by the present invention is continuously wound, that is, a single coil can be used to realize continuous winding of the loading coil 12 with the tap 121, and the continuous coil only needs to be folded back at the tap 121 and then fixedly connected to the wiring terminal, without welding at the connection of the two sections of the loading coil 12, thereby avoiding the inductance error caused by the welding point and further improving the inductance accuracy.

[0073] Embodiment 7 provided by the present invention is:

[0074] On the basis of Example 1, further, the rotor core 211 is a hollow structure, the first fixing rod 2112 is provided with a second through hole 21121 as a threading hole, the second through hole 21121 is connected to the inner cavity of the rotor core 211, and the rotor core 211 is provided with two wiring holes 2113, one end of the rotor coil extends into the inner cavity of the rotor core 211 from one of the wiring holes 2113, and then extends out from one of the second through holes 21121 of the first fixing rod 2112, and the other end extends into the inner cavity of the rotor core 211 from the other wiring hole 2113, and then extends out from the other second through hole 21121 of the first fixing rod 2112.

[0075] When the rotor coil is wound, it first enters the inner cavity of the rotor core 211 through a second through hole 21121, then passes through a wiring hole 2113 to the outside of the rotor core 211, is wound according to the trajectory of the first groove 2111, and then passes through another wiring hole 2113 to the inner cavity of the rotor core 211, and passes out of the rotor core 211 from another second through hole 21121. The two ends of the rotor coil are protected by the two second through holes 21121, and the two ends of the rotor coil are positioned by the two second through holes 21121 and the two wiring holes 2113, so as to improve the accuracy and stability of the rotor coil winding.

[0076] Preferably, the second through hole 21121 is arranged along the length direction of the first fixing rod 2112 to facilitate processing.

[0077] Embodiment 8 provided by the present invention is:

[0078] On the basis of the first or seventh embodiment, specifically, the rotor core 211 is two symmetrically arranged hemispherical rotor cores 2114, and the two hemispherical rotor cores 2114 are provided with tenons 2115 and slots 2116 for positioning connection at the butt surfaces.

[0079] Through the locking connection of the tenon 2115 and the slot 2116, the two hemispherical rotor cores 2114 are assembled into one rotor core 211, which has good structural stability and is easy to install.

[0080] Preferably, the two hemispherical rotor cores 2114 are provided with an even number of pairs of tenons 2115 and slots 2116 at the docking surfaces, and one hemispherical rotor core 2114 is provided with a tenon 2115 and a slot 2116 in one diameter direction. On the one hand, the even number of pairs of tenons 2115 and slots 2116 are subjected to opposite forces after the two hemispherical rotor cores 2114 are docked, and are not easy to open after docking, thus having good structural stability. On the other hand, the two hemispherical rotor cores 2114 can be easily made into structures with the same shape, thus saving processing costs.

[0081] Embodiment 9 provided by the present invention is:

[0082] On the basis of the first embodiment, specifically, the stator core 212 is two symmetrical hollow hemispherical stator cores 2123, and the two hollow hemispherical stator cores 2123 are provided with a fixing block 2124 extending outward along the diameter at the butt surface, and the fixing block 2124 is provided with a corresponding third through hole 21241, and the screw passes through the third through hole 21241 of the two hollow hemispherical stator cores 2123 and is screwed with the nut. The two hollow hemispherical stator cores 2123 are fixedly connected by screws, and installation and maintenance are convenient.

[0083] Specifically, the end of the first fixing rod 2112 is in a square shape, so that the rotor coil is not prone to slipping during movement, and the structure has good stability.

[0084] Specifically, two second fixing rods 2125 extending symmetrically outward are provided on one diameter of the stator core 212, and the second fixing rods 2125 are fixedly connected to the stator bracket 214, so as to facilitate installation.

[0085] Furthermore, the end of the second fixing rod 2125 is in a square shape, and has good structural stability.

[0086] Embodiment 10 provided by the present invention is:

[0087] On the basis of embodiment 1, further, the second variable inductor 2 also includes a stepper motor 22, an elastic coupling 23, a rocker rod 26 and two limit switches 27, the output shaft of the stepper motor 22 is fixedly connected to one of the first fixed rods 2112 through the elastic coupling 23, one end of the rocker rod 26 is fixedly connected to the other first fixed rod 2112, and the other end touches the two limit switches 27 at two extreme positions respectively, and the rocker rod 26 swings back and forth within a range of 180° in the circumferential direction.

[0088] The stepper motor 22 is connected to the rotor core 211 through an elastic coupling 23, and the stepper motor 22 is used to drive the rotor core 211 and the rotor coil to rotate. The stepper motor 22 is used to control the rotation angle of the rotor coil. The rocker 26 and two limit switches 27 are used to detect whether the rotor coil rotates to two extreme positions, so that the operation accuracy is high.

[0089] The eleventh embodiment provided by the present invention is:

[0090] On the basis of the tenth embodiment, further, the second variable inductor 2 further includes a rotor connecting shaft 24 and a brush 25, the rotor connecting shaft 24 is connected to the first fixing rod 2112 of the rotor core 211, the brush 25 includes a copper bearing 251, a mounting plate 252, a spring 253 and a wire 254, the outer ring of the copper bearing 251 is fixed on the rotor bracket 213, the inner ring of the copper bearing 251 is sleeved on the rotor connecting shaft 24, and the mounting plate 252 is fixed on the rotor bracket On the frame 213, the two ends of the spring piece 253 are horizontal sections, and the middle is an arc section. The horizontal sections at both ends of the spring piece 253 are fixed on the mounting plate 252, and the outer cylindrical surface of the middle arc section of the spring piece 253 is pressed against the outer cylindrical surface of the rotor connecting shaft 24. One end of the wire 254 is connected to the spring piece 253, and the other end is connected to the copper bearing 251. One end of the stator coil is electrically connected to the brush 25, and one end of the rotor coil is electrically connected to the brush 25 through the rotor connecting shaft 24.

[0091] Specifically, the rotor bracket 213 is connected to the outer ring of the copper bearing 251, the rotor connecting shaft 24 is connected to the inner ring of the copper bearing 251, the other end of the wire 254 is also connected to the outer ring of the copper bearing 251, one end of the wire 254 is connected to the spring 253, the arc segment of the spring 253 is always pressed on the outer circumferential surface of the rotor connecting shaft 24 under the action of its own elastic force, one end of the rotor coil is electrically connected to the rotor connecting shaft 24, and the stator coil is electrically connected to the brush 25. Specifically, the stator coil can be electrically connected to the outer ring of the copper bearing 251, the spring 253 or the screws on the rotor bracket 213 used to fix the copper bearing 251 and the spring 253, that is, the electrical connection between the first stator coil and the rotor coil is realized through the copper bearing 251. When the brush 25 is running, the inner ring and the outer ring of the copper bearing 251 rotate relative to each other, and the copper bearing 251 itself has a certain The circular runout means that there may be a certain degree of intermittent connection. The spring clip 253 is used to always press the rotor connecting shaft 24 downward, that is, the spring clip 253 is always electrically connected to the rotor connecting shaft 24. On the one hand, it prevents the circular runout when the copper bearing 251 rotates, and ensures the stability of the electrical connection between the inner ring and the outer ring of the copper bearing 251. On the other hand, the spring clip 253 is combined with the wire 254 to realize the electrical connection between the rotor connecting shaft 24 and the rotor bracket 213 from another path, that is, the second electrical connection between the stator coil and the rotor coil is realized, so that the electrical connection between the stator coil and the rotor coil is stable, ensuring the stability of signal transmission when the communication equipment is running, avoiding sparking and spark jumping, thereby avoiding electromagnetic compatibility problems such as electromagnetic interference and electromagnetic radiation caused by sparking, avoiding adhesion and carbonization of the brush 25, and improving the service life of the communication equipment.

[0092] The twelfth embodiment provided by the present invention is:

[0093] On the basis of the tenth embodiment, further, the working principle diagram of the variable inductor is as follows: Figure 1 and Figure 2 As shown, the spherical variable inductor 21 is connected in series with the loading coil 12. The rotation of the motor drives the inductance of the spherical variable inductor 21 to change. Through the detection of two limit switches 27, the spherical variable inductor 21 swings between the left limit position and the right limit position when rotating, so as to achieve fine adjustment of the inductance; the loading coil 12 is divided into multiple sections, and the inductance of each section of the loading coil 12 can be different or the same. Each section of the loading coil 12 is connected in series. When used, each section of the loading coil 12 is connected in parallel with a relay to achieve independent control of each section of the loading coil 12. If a section of the loading coil 12 is required to participate in the work, the relay controlling the section of the loading coil 12 can be turned on to achieve coarse adjustment of the inductance; the inductance of the spherical variable inductor 21 plus the inductance of the loading coil 12 participating in the work is the inductance of the variable inductor at this time.

[0094] In summary, the variable inductor with continuously adjustable inductance provided by the present invention is convenient for fine adjustment and coarse adjustment of inductance, and realizes multiple continuous adjustments of inductance through the combination of the loading coil 12 and the spherical variable inductor 21, and increases the overall inductance, so that the variable inductor has higher precision; the loading coil 12 used for manually winding two layers is positioned by the wire clamping protrusion 111, and the wiring clearance opening 1111 and the wire blocking protrusion 1112 thereon, so that the loading coil 12 is wound tightly and regularly, and the tap end and both ends of the loading coil 12 are positioned by the tap clamping hole 113, the coil starting wire clamping hole 114, and the coil ending wire clamping hole 115, so that a single coil can realize the winding of the loading coil 12, which is convenient for batch manual winding of the loading coil 12, and the obtained loading coil 12 has high precision, and the single-segment loading coil 12 is controlled by the relay. Whether to participate in the work for control, so that the variable inductor has a variety of variable inductances and is widely used; the rotor core 211 and the stator core 212 are complete spherical structures, the rotor coil and the stator coil are wound according to the preset track, which is convenient for manual winding and ensures the accuracy of the inductance during manual winding. The stepper motor 22 drives the rotor core 211 and the rotor coil to reciprocate within a range of 180° to adjust the inductance, and the swing rod 26 and the limit switch 27 further ensure the adjustment accuracy of the inductance. The brush 25 ensures the electrical connection between the rotor coil and the stator coil. The brush 25 has good structural stability, so that the spherical variable inductor 21 can realize continuous adjustable inductance as a whole, and is convenient for manual winding of coils, convenient for batch manual winding, high inductance accuracy, stable performance of the brush 25, not prone to sparking and sparking, good communication stability, and long service life.

[0095] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent transformations made using the contents of the present invention's specification and drawings, or directly or indirectly applied in related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A variable inductor with continuously adjustable inductance, characterized in that: The invention comprises a first variable inductor and a second variable inductor, wherein the first variable inductor comprises an inductance coil, wherein the inductance coil comprises at least one tap; the second variable inductor comprises a spherical variable inductor, wherein the spherical variable inductor comprises a rotor core, a rotor coil, a stator core, a stator coil, a rotor bracket and a stator bracket, wherein the rotor core is spherical, wherein the spherical surface of the rotor core is provided with a spiral first groove, wherein the rotor coil is wound in the first groove, wherein the stator core is hollow spherical, wherein the spherical surface of the stator core is provided with a spiral second groove, wherein the stator coil is wound in the second groove, wherein the rotor core is installed in the stator core, wherein the rotor core is provided with a spiral second groove, wherein the stator coil is wound in the second groove, wherein the rotor core is installed in the stator core, wherein the rotor core is provided with a spiral second groove, wherein the stator coil is wound in the second groove, wherein the stator core is installed in the stator core, wherein the stator coil is wound in the second groove, wherein the stator core is provided with a spiral second groove, wherein the stator coil is wound in the second groove, wherein the stator core is installed in the stator core, wherein the stator coil is wound in the second groove, wherein the stator core is provided with a spiral second groove, wherein the stator coil is wound in the second groove, wherein the stator core is provided with a spiral second groove, wherein the stator coil is wound in the second groove, wherein the stator core is installed in the stator core, wherein the stator coil is wound in the second groove, wherein the stator coil is wound in the second groove, wherein the stator core is provided with a spiral ... The center of the rotor core coincides with the center of the stator core, two first fixing rods extending symmetrically outward are provided on one diameter of the rotor core, two first through holes are provided symmetrically on one diameter of the stator core, the first fixing rods pass through the first through holes, the first fixing rods are rotatably connected to the rotor bracket, and the stator core is fixedly connected to the stator bracket; the first variable inductor and the second variable inductor are connected in series, the inductance of the second variable inductor is greater than the maximum value of the difference in inductance of each segment of the inductance coil separated by the tap of the first variable inductor, and greater than the minimum inductance of each segment of the inductance coil of the first variable inductor; The second variable inductor also includes a stepper motor, an elastic coupling, a rocker arm and two limit switches. The output shaft of the stepper motor is fixedly connected to one of the first fixed rods through the elastic coupling. One end of the rocker arm is fixedly connected to the other first fixed rod, and the other end touches the two limit switches at two extreme positions respectively. The rocker arm swings back and forth in a circumferential direction.

2. The variable inductor with continuously adjustable inductance according to claim 1, characterized in that: The first variable inductor also includes a coil frame, the loading coil is wound on the coil frame, a plurality of wire-holding protrusions arranged side by side in the circumferential direction are provided on the coil frame, the distance between adjacent wire-holding protrusions is adapted to the diameter of the loading coil, the height and width of the wire-holding protrusions are both smaller than the diameter of the loading coil, each of the wire-holding protrusions is provided with a wiring clearance opening, the loading coils are staggered and stacked in two layers on the coil frame, the loading coils located on the bottom layer are wound on both sides of the wire-holding protrusions, and the loading coils located on the top layer are wound close to and between two adjacent turns of the loading coils located on the bottom layer, and when winding, each layer of the loading coils jumps from one side of a wire-holding protrusion to the other side at the wiring clearance opening.

3. The variable inductor with continuously adjustable inductance according to claim 2, characterized in that: A wire blocking protrusion is provided on each of the wire clamping protrusions, the height of the wire blocking protrusion is greater than or equal to twice the diameter of the loading coil, the wire blocking protrusion is connected to the wiring clearance opening, and the wire blocking protrusion is located at the front end of the wiring clearance opening along the winding direction.

4. The variable inductor with continuously adjustable inductance according to claim 2, characterized in that: When winding the loading coil, the odd-numbered turns starting from the 3rd turn are wound on the top layer, and the other turns are wound on the bottom layer.

5. The variable inductor with continuously adjustable inductance according to claim 2, characterized in that: It also includes a binding strap, and an inner hole and a tap wire clamping hole are provided on the coil skeleton, and the tap wire clamping hole is communicated with the inner hole, and two tap wire clamping holes are correspondingly provided at each tap. When winding, the binding strap passes through the two tap wire clamping holes and binds the tap; the end of the coil skeleton is also provided with a coil starting wire clamping hole and a coil ending wire clamping hole, and the coil starting wire clamping hole and the coil ending wire clamping hole are both communicated with the inner hole of the coil skeleton, and the inner hole of the coil skeleton is connected with its two ends. When winding, one binding strap passes through the coil starting wire clamping hole, the inner hole and one end of the coil skeleton, and binds the starting end of the inductive coil, and the other binding strap passes through the coil ending wire clamping hole, the inner hole and the other end of the coil skeleton, and binds the ending end of the inductive coil.

6. The variable inductor with continuously adjustable inductance according to claim 1, characterized in that: The rotor core is a hollow structure, and the first fixing rod is provided with a second through hole as a threading hole, and the second through hole is connected to the inner cavity of the rotor core. The rotor core is provided with two wiring holes, one end of the rotor coil extends into the inner cavity of the rotor core from one of the wiring holes, and then extends out from one of the second through holes of the first fixing rod, and the other end extends into the inner cavity of the rotor core from the other wiring hole, and then extends out from the other second through hole of the first fixing rod.

7. The variable inductor with continuously adjustable inductance according to claim 1 or 6, characterized in that: The rotor cores are two symmetrically arranged hemispherical rotor cores, and the two hemispherical rotor cores are provided with tenons and slots for locking connection at the butt surfaces.

8. The variable inductor with continuously adjustable inductance according to claim 1, characterized in that: The stator core is two symmetrical hollow hemispherical stator cores, and the two hollow hemispherical stator cores are provided with fixing blocks extending outward along the diameter at the butt surface, and the fixing blocks are provided with corresponding third through holes, and the screws pass through the third through holes of the two hollow hemispherical stator cores and are threadedly connected with nuts.

9. The variable inductor with continuously adjustable inductance according to claim 1, characterized in that: The rocker arm swings back and forth within a range of 180° in the circumferential direction.

10. The variable inductor with continuously adjustable inductance according to claim 1, characterized in that: The second variable inductor also includes a rotor connecting shaft and a brush. The rotor connecting shaft is connected to the first fixing rod of the rotor core. The brush includes a copper bearing, a mounting plate, a spring and a wire. The outer ring of the copper bearing is fixed to the rotor bracket. The inner ring of the copper bearing is sleeved on the rotor connecting shaft. The mounting plate is fixed to the rotor bracket. The two ends of the spring are horizontal sections and the middle is an arc section. The horizontal sections at both ends of the spring are fixed to the mounting plate. The outer cylindrical surface of the middle arc section of the spring is pressed against the outer cylindrical surface of the rotor connecting shaft. One end of the wire is connected to the spring and the other end is connected to the copper bearing. One end of the stator coil is electrically connected to the brush. One end of the rotor coil is electrically connected to the brush through the rotor connecting shaft.

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