Common mode choke

Abstract

The common mode choke comprises a magnetic core and a winding, the winding is wound on the outer side of the magnetic core in a double-wire parallel winding mode, a mounting base is arranged outside the magnetic core, the mounting base comprises a mounting plate, positioning blocks are movably arranged on the upper surfaces of the two ends of the mounting plate respectively, the magnetic core is fixed between the positioning blocks, and the positioning blocks are movably arranged on the upper surfaces of the two ends of the mounting plate respectively. The magnetic core and the winding are arranged, the magnetic core is wound in a double-wire parallel winding mode, leakage inductance can be reduced through the winding mode, the magnetic core is a reduced iron powder magnetic core with high magnetic conductivity, high heat resistance and high moisture resistance, and the magnetic core is not prone to being damaged. The magnetic core has the performance and effects of high magnetic conductivity, high heat resistance, high moisture resistance, high saturation, high frequency, strong filtering and the like, the mounting plate is arranged, the positioning blocks are arranged at the two ends of the mounting plate and used for clamping the magnetic core, mounting of the magnetic core is facilitated, and the electrodes used for being electrically connected with the winding are arranged on the positioning blocks, so that equipment modularization is achieved, cost is reduced, and assembling is convenient.

Description

Technical Field

[0001] The invention relates to the technical field of inductance equipment, in particular to a common mode choke. Background Art

[0002] Common mode inductance (Common mode Choke), also known as common mode choke, is a coil with the same number of turns and opposite winding directions on a closed magnetic ring. An ideal common mode choke has a suppressive effect on the common mode interference between L (or N) and E, but has no inductive suppressive effect on the differential mode interference between L and N. However, the incomplete symmetry of the actual coil winding will lead to the generation of differential mode leakage inductance. When the signal current or power current flows through the two windings, the directions are opposite, the magnetic flux generated cancels each other, and the choke presents a low impedance. The common mode noise current (including the disturbance current caused by the ground loop, also called the longitudinal current) flows through the two windings in the same direction, and the magnetic flux generated is added in the same direction, and the choke presents a high impedance, thereby suppressing the common mode noise.

[0003] Common mode chokes are often used to suppress common mode interference in electronic circuits. Existing common mode chokes have problems such as unsatisfactory filtering effect, large size, high cost, and poor high-frequency performance in certain application scenarios. Therefore, a common mode choke is proposed. Summary of the invention

[0004] The object of the present invention is to provide a common mode choke to solve the problems raised in the above background technology.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: a common mode choke, comprising a magnetic core and a winding, wherein the winding is wound on the outside of the magnetic core in a double-wire parallel winding manner, a mounting seat is provided on the outside of the magnetic core, the mounting seat comprises a mounting plate, and positioning blocks are movably provided on the upper surfaces of both ends of the mounting plate, the magnetic core is fixed between the positioning blocks, and electrodes connected to the winding are provided on the surface of the side away from the positioning blocks.

[0006] According to the above technical solution, the upper surface of the mounting plate is provided with a slide groove extending along the length direction, the surface of the positioning block is fixedly connected with a slider, and the slider is slidably arranged inside the slide groove.

[0007] According to the above technical solution, a driving screw is rotatably arranged inside the slide slot, the driving screw passes through the end face of the slider and is threadedly connected to the slider, and one end of the driving screw passes through the end face of the slide slot and is fixedly connected to a first adjusting knob.

[0008] According to the above technical solution, grooves are respectively provided on the opposite surfaces of the positioning blocks, each positioning block has two grooves, and the two grooves are respectively provided at both ends of the positioning blocks, and clamping blocks are movably provided on the inner surfaces of the grooves, each groove has two clamping blocks, and electrode plates are fixedly connected to the opposite surfaces of the two clamping blocks, and the electrode plates are electrically connected to the motor.

[0009] According to the above technical solution, a transmission groove is provided on the inner surface of the groove, and transmission blocks are fixedly connected to the inside of the surface of the clamping block corresponding to the transmission groove, and an adjusting screw is rotatably provided inside the positioning block, which passes through the transmission groove and is screwed with the transmission blocks respectively.

[0010] According to the above technical solution, a rotating tube is penetrated and rotatably provided on the end surface of the slider, a first transmission cavity is provided inside the slider corresponding to the outside of the rotating tube, a transmission gear is fixedly connected to the outer circumference of the rotating tube corresponding to the first transmission cavity, a second transmission cavity is provided inside the positioning block corresponding to the upper end of the first transmission cavity, a crown gear meshing with the transmission gear is rotatably provided inside the first transmission cavity, a first bevel gear is rotatably provided inside the second transmission cavity, a transmission shaft is fixedly connected between the first bevel gear and the crown gear, a second bevel gear is fixedly connected to the outer circumference of the adjusting screw corresponding to the second transmission cavity, the first bevel gear meshes with the second bevel gear, a rotating rod is rotatably provided inside the slide groove, the rotating rod passes through the rotating tube and is movably connected to the rotating tube, and one end of the rotating rod passes through the slide groove and is coaxially connected to the second adjusting knob.

[0011] According to the above technical solution, a buffer tube is provided through the end surface of the transmission block, the buffer tube is movably connected to the transmission block, an elastic element is provided between the buffer tube and the transmission block, and the adjusting screw passes through the buffer tube and is threadedly connected to the buffer tube.

[0012] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: the present invention, by providing a magnetic core and a winding, the magnetic core is wound in a double-wire parallel winding manner, this winding manner can reduce leakage inductance, and when current passes through the coil, a strong damping effect is generated, thereby attenuating the common-mode current, achieving the purpose of filtering, and improving the quality of differential-mode signal transmission. The magnetic core adopts a reduced iron powder magnetic core with high magnetic permeability, high heat and moisture resistance, which has the properties and effects of high magnetic permeability, high heat and moisture resistance, high saturation, high frequency, and strong filtering. By providing a mounting plate, positioning blocks are provided at both ends of the mounting plate for clamping the magnetic core, which facilitates the installation of the magnetic core, and electrodes for electrical connection to the winding are provided on the positioning blocks, so that the equipment is modularized, the cost is reduced, and the assembly is convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0014] Figure 1 It is a schematic diagram of the structure of the present invention;

[0015] Figure 2 It is a schematic diagram of the main cross-sectional structure of the present invention;

[0016] Figure 3 It is a schematic diagram of a top cross-sectional structure of the present invention;

[0017] Figure 4 It is a schematic diagram of the clamping block structure of the present invention;

[0018] In the figure: 1-magnetic core, 2-winding, 3-mounting plate, 4-positioning block, 5-electrode, 6-slide groove, 7-slider, 8-driving screw, 9-first adjusting knob, 10-groove, 11-clamping block, 12-electrode plate, 13-transmission groove, 14-transmission block, 15-adjusting screw, 16-rotating tube, 17-first transmission cavity, 18-transmission gear, 19-second transmission cavity, 20-crown gear, 21-first bevel gear, 22-transmission shaft, 23-second bevel gear, 24-rotating rod, 25-second adjusting knob, 26-buffer tube. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] See also Figure 1-4 The present invention provides a technical solution: a common mode choke, including a magnetic core 1 and a winding 2, the winding 2 is wound on the outside of the magnetic core 1 in a double-wire parallel winding manner, and the magnetic core adopts a reduced iron powder magnetic core with high magnetic permeability, high heat and moisture resistance, high saturation, high frequency, strong filtering and other performances and effects. The winding is made of enameled copper in a double-wire parallel winding manner. This winding method can reduce leakage inductance. When the current passes through the coil, it produces a strong damping effect, thereby attenuating the common mode current, achieving the purpose of filtering, and improving the transmission quality of differential mode signals. The magnetic core 1 is provided with a mounting seat on the outside, and the mounting seat includes a mounting plate 3. Positioning blocks 4 are movably provided on the upper surfaces of both ends of the mounting plate 3. The positioning blocks 4 are extended along the width direction of the mounting plate 3. The magnetic core 1 is fixed between the positioning blocks 4. The surfaces of the positioning blocks 4 on the sides away from each other are respectively provided with electrodes 5 connected to the winding 2;

[0021] Specifically, the upper surface of the mounting plate 3 is provided with a slide groove 6 extending in the length direction, and the surface of the positioning block 4 is fixedly connected with a slider 7, and the slider 7 is slidably arranged inside the slide groove 6, so that the positioning block 4 can slide along the slide groove 7, and the winding 2 is installed on the mounting plate 3 and fixed by the positioning block 4;

[0022] Specifically, a driving screw 8 is rotatably arranged inside the slide groove 6, and the driving screw 8 extends along the length direction of the slide groove 6. The driving screw 8 passes through the end face of the slider 7 and is screwed to the slider 7. One end of the driving screw 8 passes through the end face of the slide groove 6 and is fixedly connected to a first adjusting knob 9. The threads at both ends of the driving screw 8 are arranged in opposite directions. By rotating the first adjusting knob 9, the slider 7 is driven to slide synchronously in the opposite direction through the driving screw 8, and the slider 7 controls the sliding of the positioning block 4.

[0023] Specifically, grooves 10 are respectively provided on the opposite surfaces of the positioning block 4, and the number of grooves 10 of each positioning block 4 is two, and the two grooves 10 are respectively provided at both ends of the positioning block 4, and clamping blocks 11 are respectively movably provided on the inner surfaces of the grooves 10, and the number of clamping blocks 11 in each groove 10 is two, and the relative surfaces of the two clamping blocks 11 are fixedly connected with electrode plates 12, and the electrode plates 12 are electrically connected to the motor 5. When installing the winding 2, the copper wire on the winding is inserted between the two clamping blocks 11 inside the groove 10, and the clamping block 11 is controlled to clamp the copper wire so that the copper wire forms an electrical connection with the electrode plate 12 on the positioning block 4, and the installation of the winding is completed;

[0024] Specifically, a transmission groove 13 is provided on the inner surface of the groove 10, and a transmission block 14 is fixedly connected to the surface of the clamping block 11 corresponding to the inside of the transmission groove 13, and an adjusting screw 15 is rotatably provided inside the positioning block 4. The adjusting screw 15 passes through the transmission groove 13 and is respectively screwed with the transmission block 14. The transmission block 14 can be driven to slide inside the transmission groove 13 by rotating the adjusting screw 15, and the clamping block 11 is driven by the transmission block 14 to move;

[0025] Specifically, a rotating tube 16 is penetrated and rotatably provided on the end surface of the slider 7, a first transmission cavity 17 is provided inside the slider 7 corresponding to the outside of the rotating tube 16, a transmission gear 18 is fixedly connected to the outer circumference of the rotating tube 16 corresponding to the first transmission cavity 17, a second transmission cavity 19 is provided inside the positioning block 4 corresponding to the upper end of the first transmission cavity 17, a crown gear 20 meshing with the transmission gear 18 is rotatably provided inside the first transmission cavity 17, a first bevel gear 21 is rotatably provided inside the second transmission cavity 19, a transmission shaft 22 is fixedly connected between the first bevel gear 21 and the crown gear 20, a second bevel gear 23 is fixedly connected to the outer circumference of the adjusting screw 15 corresponding to the second transmission cavity 19, the first bevel gear 21 meshes with the second bevel gear 23, a rotating rod 24 is rotatably provided inside the slide 6, the rotating rod 24 passes through the rotating tube 16 and is meshed with the rotating gear 18 The movable tube 16 is movably connected, and the outer peripheral surface of the rotating rod 24 is provided with a limiting groove extending in the same direction, and a limiting block movably connected to the limiting groove is provided on the inner wall of the rotating tube 16, so that the rotating tube 16 can slide along the rotating rod 24, and the rotating rod 24 can drive the rotating tube 16 to rotate. One end of the rotating rod 24 passes through the slide groove 6 and is coaxially connected with a second adjusting knob 25. The rotating rod 24 is driven to rotate by rotating the second adjusting knob 25. The rotating tube 16 drives the rotating rod 24 to rotate under the action of the transmission gear 18 and the crown gear 20. The rotating rod 24 drives the transmission shaft 22 to rotate through the first bevel gear 21 and the second bevel gear 23. The transmission shaft 22 drives the adjusting screw 15 to rotate to control the movement of the clamping block 11. When the positioning block 4 slides on the mounting plate 3, the rotating tube 16 is always sleeved on the outer side of the rotating rod 24, which will not interfere with the movement of the positioning block 4, and the installation is more convenient.

[0026] Specifically, a buffer tube 26 is provided through the end surface of the transmission block 14, and the buffer tube 26 is movably connected with the transmission block 14. An elastic element is provided between the buffer tube 26 and the transmission block 14. The elastic element can be a spring sleeved on the outside of the buffer tube 26. Under the action of the elastic element, the buffer tube 26 tends to move away from each other. The adjusting screw 15 passes through the buffer tube 26 and is threadedly connected with the buffer tube 26. When the clamping block 11 is controlled to move by the adjusting screw 15, after the clamping block 11 clamps the copper wire, the adjusting screw 15 is continuously controlled to rotate, so that the buffer tube 26 overcomes the elastic element and slides relative to the transmission block 14 to achieve buffering, ensuring that the clamping block 11 will not damage the copper wire while clamping the copper wire, and also preventing the clamping from loosening. In order to prevent the buffer tube 26 from rotating with the rotation of the adjusting screw 15, a slide groove extending in the same direction can be provided on the outer wall of the buffer tube 26, and a slider slidably connected with the slide groove is provided on the transmission block 14;

[0027] When the present invention is used, the winding is placed between the two corresponding positioning blocks 4 on the mounting plate 3, and the first adjusting knob 9 is rotated. The first adjusting knob 9 drives the driving screw 8 to rotate. Under the action of the thread cooperation, the slider 7 drives the positioning block 4 to slide, and the copper wire is inserted between the clamping blocks 11 in the groove 10. The second adjusting knob 25 is rotated to drive the rotating tube 16 to rotate. The rotating tube 16 drives the transmission shaft 22 to rotate through the transmission gear 18 and the crown gear 20. The transmission shaft 22 drives the adjusting screw 15 to rotate through the first bevel gear 21 and the second bevel gear 23. Under the action of the thread cooperation, the clamping block 11 is controlled to clamp the copper wire to complete the installation of the winding.

[0028] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0029] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A common mode choke, comprising a magnetic core (1) and a winding (2), characterized in that: The winding (2) is wound on the outside of the magnetic core (1) in a double-wire parallel winding manner. A mounting seat is provided on the outside of the magnetic core (1). The mounting seat comprises a mounting plate (3). Positioning blocks (4) are movably provided on the upper surfaces of both ends of the mounting plate (3). The magnetic core (1) is fixed between the positioning blocks (4). Electrodes (5) connected to the winding (2) are provided on the surfaces of the positioning blocks (4) away from each other.

2. A common mode choke according to claim 1, characterized in that: The upper surface of the mounting plate (3) is provided with a slide groove (6) extending in the length direction, and the surface of the positioning block (4) is fixedly connected with a slider (7), and the slider (7) is slidably arranged inside the slide groove (6).

3. A common mode choke coil according to claim 2, characterized in that: A driving screw (8) is rotatably arranged inside the slide groove (6), and the driving screw (8) passes through the end surface of the slider (7) and is screwed to the slider (7). One end of the driving screw (8) passes through the end surface of the slide groove (6) and is fixedly connected to a first adjusting knob (9).

4. A common mode choke coil according to claim 3, characterized in that: The opposing surfaces of the positioning block (4) are respectively provided with grooves (10), the number of the grooves (10) of each positioning block (4) is two, and the two grooves (10) are respectively provided at two ends of the positioning block (4), the inner surfaces of the grooves (10) are respectively provided with clamping blocks (11) movably, the number of the clamping blocks (11) in each groove (10) is two, and the opposing surfaces of the two clamping blocks (11) are fixedly connected with electrode plates (12), and the electrode plates (12) are electrically connected to the motor (5).

5. A common mode choke coil according to claim 4, characterized in that: The inner surface of the groove (10) is provided with a transmission groove (13), the surface of the clamping block (11) corresponds to the transmission groove (13) and is respectively fixedly connected with a transmission block (14) inside, and an adjusting screw (15) is rotatably provided inside the positioning block (4), and the adjusting screw (15) passes through the transmission groove (13) and is respectively screwed with the transmission block (14).

6. A common mode choke coil according to claim 5, characterized in that: A rotating tube (16) is rotatably provided through the end surface of the slider (7); a first transmission cavity (17) is provided inside the slider (7) corresponding to the outside of the rotating tube (16); a transmission gear (18) is fixedly connected to the outer circumference of the rotating tube (16) corresponding to the first transmission cavity (17); a second transmission cavity (19) is provided inside the positioning block (4) corresponding to the upper end of the first transmission cavity (17); a crown gear (20) meshing with the transmission gear (18) is rotatably provided inside the first transmission cavity (17); a first bevel gear (20) is rotatably provided inside the second transmission cavity (19) A transmission shaft (22) is fixedly connected between the first bevel gear (21) and the crown gear (20), a second bevel gear (23) is fixedly connected to the outer circumference of the adjusting screw (15) corresponding to the second transmission cavity (19), the first bevel gear (21) and the second bevel gear (23) are meshed, a rotating rod (24) is provided inside the slide groove (6) for rotation, the rotating rod (24) passes through the rotating tube (16) and is movably connected to the rotating tube (16), one end of the rotating rod (24) passes through the slide groove (6) and is coaxially connected to a second adjusting knob (25).

7. A common mode choke coil according to claim 6, characterized in that: A buffer tube (26) is provided through the end surface of the transmission block (14), the buffer tube (26) is movably connected to the transmission block (14), an elastic element is provided between the buffer tube (26) and the transmission block (14), and the adjusting screw (15) passes through the buffer tube (26) and is threadedly connected to the buffer tube (26).

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