Vehicle-mounted chassis circuit patch common mode inductor

Abstract

The invention relates to the technical field of common-mode inductors, and discloses a vehicle-mounted chassis circuit patch common-mode inductor which comprises a shell, a double-column magnetic core and an I-type magnetic core which are arranged in the shell, a terminal which is fixed above the shell, a flat wire which is wound on two sides of the double-column magnetic core, and a terminal which is located in the terminal, the silica gel strip is fixed in the shell; the size of the air gap distance is controlled through the intensity of the magnetic field; when a flat wire is electrified, an annular magnetic field is generated around the wire, the magnetic field intensity is concentrated at the two ends of a magnetic core, magnetic particles in magnetic fluid can be concentrated in an area with the strong magnetic field and are driven by magnetic force, and the magnetic fluid pushes a magnetomotive piston to move and extrudes hydraulic oil in a hydraulic area; the hydraulic push plate is pushed by hydraulic oil to extrude the magnetic core, and air gaps are reduced; according to the invention, the heat dissipation is good, the limited packaging space of a customer is fully utilized, the product packaging is small, the current is large, the power is high, and the service power of the product is effectively improved.

Description

Technical Field

[0001] The invention relates to the technical field of common-mode inductors, and in particular to a common-mode inductor for a vehicle chassis circuit patch. Background Art

[0002] With the continuous development of automotive electronic technology, the complexity and requirements of vehicle circuits are also increasing. During operation, vehicle chassis circuits are often subject to electromagnetic interference, especially the influence of high-frequency noise. In order to effectively suppress these interferences, common-mode inductors are widely used in vehicle circuits. Common-mode inductors can effectively filter out common-mode noise signals by providing inductance in the current loop. However, existing common-mode inductors have certain limitations in design, especially in the design of magnetic cores. Current common-mode inductors cannot effectively control the gap of the air gap between the magnetic cores, which results in the inability to fully optimize the performance and stability of the inductor, thereby limiting its noise suppression effect in high-frequency circuits.

[0003] In traditional common-mode inductor design, the air gap design of the magnetic core is often determined by fixed parameters, but this method cannot be precisely adjusted to meet the needs of different application scenarios. Especially for vehicle chassis circuits, due to the wide frequency range of electromagnetic interference in the vehicle environment and the complex circuit operating conditions, traditional common-mode inductors often cannot provide ideal suppression effects. The gap control of the air gap between the magnetic cores is one of the key factors affecting the performance of the inductor. Therefore, how to accurately control the air gap to ensure the optimal effect on high-frequency noise suppression has become an important technical problem in the current common-mode inductor design. Summary of the invention

[0004] The present invention provides a common-mode inductor for a vehicle chassis circuit patch. When a large current passes through a flat wire, a ring-shaped magnetic field is generated around the wire. Magnetic particles in a magnetic fluid are concentrated in an area with a strong magnetic field and driven by magnetic force, so that the magnetic fluid can push the movement of a magnetic piston, and the size of the air gap of the magnetic core is further controlled by hydraulic oil.

[0005] In order to solve the above technical problems, the technical solution of the present invention is as follows: A common-mode chip inductor for a vehicle chassis circuit includes: a housing, a double-column magnetic core and an I-type magnetic core arranged in the housing, and also includes: The terminal is fixed on the upper part of the shell, and the flat wire is wound around the two sides of the double-column magnetic core, and the terminal is located inside the terminal; the silicone strip is fixed inside the shell and is used to bond the double-column magnetic core and the I-type magnetic core; There are two magneto-tubes, which are fixed on the housing and located at the bottom of the housing, and are used to store magnetic fluid and hydraulic oil; a magnetic piston slides on both ends of the magneto-tube and is located inside the magneto-tube; a reset spring is fixed on both ends of the magneto-tube and is located inside the magneto-tube and fixed to the magnetic piston, and is used to reset the magnetic piston; The hydraulic cylinder is fixed on both sides of the shell; the hydraulic push plate slides in the hydraulic cylinder; An adjusting cone rod, one end of which is rotatably arranged on the housing and the other end of which is rotatably arranged on the magnetotropic tube, is used to adjust the range of motion of the magnetotropic piston in the magnetotropic tube; two adjusting sleeves are arranged on the inner side of the same magnetotropic tube and are located in the reset spring, which are used to limit the displacement of the magnetotropic piston; A heat sink is fixed on both sides of the shell; there are multiple heat sinks, which are all opened on the heat sink and arranged in a matrix for dissipating heat in the shell; there are multiple opening and closing plates, which are all slid in the heat sink and are used to adjust the opening degree of the heat sink opening; an ammonia liquid box is fixed in the shell and is located on both sides of the shell.

[0006] Furthermore, it also includes a magnetic dynamic auxiliary component, and the magnetic dynamic auxiliary component includes: The limiting convex ring is fixed in the magnetotropic tube and is located at both ends of the magnetotropic tube; the limiting groove is arranged on the side of the magnetotropic piston close to the limiting convex ring; the first rubber strip groove is arranged on the outer side of the magnetotropic piston; the first sealing rubber ring is fixed in the first rubber strip groove.

[0007] Furthermore, the magnetic auxiliary component also includes: The limit plate is fixed on the inner side of the hydraulic cylinder; the expansion groove is provided in the hydraulic cylinder; the second rubber strip groove is provided on the outer side of the hydraulic push plate, and the second sealing rubber ring is fixed in the second rubber strip groove; The two ends of the liquid distributing tube are fixed on the magnetomotive tube; the liquid collecting tube is fixed on the liquid distributing tube and is located in the shell; the conveying tube has one end fixed on the end of the liquid collecting tube away from the liquid distributing tube and the other end fixed on the hydraulic cylinder.

[0008] Furthermore, it also includes an auxiliary adjustment component, which includes: The hydraulic threaded tube has one end fixed in the magnetic tube and the other end threaded into the adjusting sleeve and located at both ends of the magnetic tube; the stabilizing plate is fixed on the adjusting sleeve; the hexagonal rod is fixed on the adjusting cone rod; the slide tube has one end slidingly sleeved on the hexagonal rod and the other end sliding on the stabilizing plate; the adjusting gear is fixed on the slide tube.

[0009] Furthermore, the auxiliary adjustment component also includes: The outer gear ring is fixed on the adjusting sleeve and meshes with the adjusting gear; the retaining ring is fixed on both sides of the outer gear ring; the rubber sheet is fixed on the magnetic piston and is located on the side of the magnetic piston away from the limiting convex ring.

[0010] Furthermore, a magnetic flow area is provided in the middle of the magneto-turbulent tube for storing magnetic fluid, and hydraulic areas are provided at both ends of the magneto-turbulent tube for storing hydraulic oil.

[0011] Furthermore, it also includes a heat dissipation auxiliary component, and the heat dissipation auxiliary component includes: The movable groove is arranged in the heat dissipation plate and communicated with the heat dissipation groove; one end of the movable spring is fixed in the movable groove and the other end is fixed on the opening and closing plate; the pulling plate is fixed on the opening and closing plate; and the displacement frame is fixed on the pulling plate.

[0012] Furthermore, the heat dissipation auxiliary component also includes: The air pressure tube is fixed above the ammonia liquid box and is located on both sides of the ammonia liquid box; the pneumatic piston slides in the air pressure tube; the push rod has one end fixed above the pneumatic piston and the other end fixed on the displacement frame; the heat sink is embedded in the heat sink; the gas pipe has one end fixed on the air pressure tube and the other end fixed on the heat sink.

[0013] Furthermore, the heat dissipation auxiliary component also includes: The liquid return pipe is fixed above the ammonia liquid box and located on both sides of the ammonia liquid box; the reflux pipe has one end fixed on the liquid return pipe and the other end fixed on the heat sink; the liquid stop ring is fixed in the liquid return pipe; the spring ring seat is fixed in the liquid return pipe and located above the liquid stop ring; the liquid return spring is fixed on the spring ring seat; the floating valve ball is fixed on the liquid return spring and located above the liquid stop ring.

[0014] Furthermore, a wiring installation groove is provided on the outside of the shell and is compatible with the terminal. A hydraulic installation groove is provided on the outside of the shell and is compatible with the hydraulic cylinder. A heat dissipation installation groove is provided on the outside of the shell and is compatible with the heat dissipation plate. An adjustment installation groove is provided on the outside of the shell and is compatible with the adjustment cone rod.

[0015] The above solution of the present invention includes at least the following beneficial effects: The present invention controls the size of the air gap spacing by the strength of the magnetic field; when electricity is passed through the flat wire, an annular magnetic field is generated around the wire, and the magnetic field strength is concentrated at both ends of the magnetic core. The magnetic particles in the magnetic fluid are concentrated in the area with a strong magnetic field and driven by the magnetic force. The magnetic fluid pushes the movement of the magnetic piston and squeezes the hydraulic oil in the hydraulic area, thereby pushing the hydraulic push plate through the hydraulic oil to squeeze the magnetic core and reduce the air gap; the present invention has good heat dissipation and makes full use of the customer's limited packaging space, so that the product packaging is small, the current is large, the power is high, and the product's power usage is effectively improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram of the overall three-dimensional structure of a common-mode chip inductor for a vehicle chassis circuit provided by an embodiment of the present invention; Figure 2A schematic diagram of the three-dimensional structure of a magnetomotive tube of a common-mode inductor of a vehicle chassis circuit patch provided by an embodiment of the present invention; Figure 3 The common mode inductor of the vehicle chassis circuit patch provided by the embodiment of the present invention Figure 2 A magnified image of point A; Figure 4 The common mode inductor of the vehicle chassis circuit patch provided by the embodiment of the present invention Figure 2 The enlarged view of point B; Figure 5 The common mode inductor of the vehicle chassis circuit patch provided by the embodiment of the present invention Figure 2 Enlarged view of point C; Figure 6 The common mode inductor of the vehicle chassis circuit patch provided by the embodiment of the present invention Figure 2 The enlarged view of point D; Figure 7 A schematic diagram of the three-dimensional structure of a heat sink of a common-mode chip inductor for a vehicle chassis circuit provided by an embodiment of the present invention; Figure 8 The common mode inductor of the vehicle chassis circuit patch provided by the embodiment of the present invention Figure 7 The enlarged view of point E; Fig. 9 The common mode inductor of the vehicle chassis circuit patch provided by the embodiment of the present invention Figure 7 The enlarged view of point F; Fig.10 The common mode inductor of the vehicle chassis circuit patch provided by the embodiment of the present invention Figure 7 The enlarged view of G; Fig.11 A schematic diagram of the three-dimensional structure of a silicone strip of a common-mode inductor for a vehicle chassis circuit provided by an embodiment of the present invention; Fig.12 A schematic diagram of the three-dimensional structure of the housing of the vehicle chassis circuit patch common-mode inductor provided in an embodiment of the present invention.

[0017] Description of reference numerals: In the figure: 1. Shell; 2. Double-column magnetic core; 3. I-type magnetic core; 4. Terminal; 5. Flat wire; 6. Silicone strip; 7. Magnetron; 8. Magnetic piston; 9. Reset spring; 10. Hydraulic cylinder; 11. Hydraulic push plate; 12. Adjusting cone rod; 13. Adjusting sleeve; 14. Heat sink; 15. Heat sink; 16. Opening and closing plate; 17. Ammonia liquid box; 18. Limiting convex ring; 19. Limiting groove; 20. First rubber strip groove; 21. First sealing rubber ring; 22. Limiting plate; 23. Liquid expansion groove; 24. Second rubber strip groove; 25. Second sealing rubber ring; 26. Liquid distribution pipe; 27. Liquid collection pipe; 28. Delivery pipe; 29. ​​Hydraulic screw Corrugated tube; 30. Stabilizing plate; 31. Hexagonal rod; 32. Slide; 33. Adjusting gear; 34. External gear ring; 35. Positioning ring; 36. Rubber sheet; 37. Magnetic flow area; 38. Hydraulic area; 39. Movable groove; 40. Movable spring; 41. Pulling plate; 42. Displacement frame; 43. Air pressure tube; 44. Pneumatic piston; 45. Push rod; 46. Heat sink; 47. Gasification tube; 48. Liquid return tube; 49. Reflux tube; 50. Liquid stop ring; 51. Spring ring seat; 52. Liquid return spring; 53. Floating valve ball; 54. Wiring installation slot; 55. Hydraulic installation slot; 56. Heat dissipation installation slot; 57. Adjustment installation slot. DETAILED DESCRIPTION

[0018] The exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present invention and to enable the scope of the present invention to be fully communicated to those skilled in the art.

[0019] like Figures 1 to 12 As shown, an embodiment of the present invention provides a common-mode chip inductor for a vehicle chassis circuit, comprising: a housing 1, a double-column magnetic core 2 and an I-type magnetic core 3 arranged in the housing 1, and further comprising: The terminal 4 is fixed on the upper part of the housing 1. The flat wire 5 is wound around the two sides of the double-column magnetic core 2, and the wiring terminal is located in the terminal 4. The silicone strip 6 is fixed in the housing 1 and is used to bond the double-column magnetic core 2 and the I-type magnetic core 3. The magnetotube 7 has two magnetotubes 7, which are fixed on the housing 1 and located at the bottom of the housing 1, and are used to store magnetic fluid and hydraulic oil; the magnetic piston 8 slides on both ends of the magnetotube 7 and is located inside the magnetotube 7; the reset spring 9 is fixed on both ends of the magnetotube 7 and is located inside the magnetotube 7 and fixed on the magnetotube 8, and is used to reset the magnetotube 8. The middle part of the magnetotube 7 is provided with a magnetic flow area 37 for storing magnetic fluid, and the two ends of the magnetotube 7 are provided with hydraulic areas 38 for storing hydraulic oil; The hydraulic cylinder 10 is fixed on both sides of the housing 1; the hydraulic push plate 11 slides in the hydraulic cylinder 10; An adjusting cone rod 12, one end of which is rotatably arranged on the housing 1, and the other end of which is rotatably arranged on the magnetostat 7, is used to adjust the range of motion of the magnetostat 8 in the magnetostat 7; two adjusting sleeves 13 are provided on the inner side of the same magnetostat 7 and are located in the reset spring 9, and are used to limit the displacement of the magnetostat 8; The heat sink 14 is fixed on both sides of the outer shell 1; there are multiple heat sinks 15, which are all opened on the heat sink 14 and arranged in a matrix for dissipating heat in the outer shell 1; there are multiple opening and closing plates 16, which are all slidable in the heat sink 15 and are used to adjust the opening degree of the heat sink 15; the ammonia liquid box 17 is fixed in the outer shell 1 and is located on both sides of the outer shell 1.

[0020] A wiring installation groove 54 is provided on the outside of the shell 1 and is compatible with the terminal 4. A hydraulic installation groove 55 is provided on the outside of the shell 1 and is compatible with the hydraulic cylinder 10. A heat dissipation installation groove 56 is provided on the outside of the shell 1 and is compatible with the heat dissipation plate 14. An adjustment installation groove 57 is provided on the outside of the shell 1 and is compatible with the adjustment cone rod 12.

[0021] Specifically, the flat wire 5 is used to meet the requirements of large current. Compared with the traditional round wire, the flat wire 5 has lower resistance and better thermal management performance, which can effectively reduce the power loss when the current passes through; the flat wire 5 also has a stronger anti-electromagnetic interference ability, which can reduce noise in the vehicle circuit and ensure the stability and reliability of the electrical system.

[0022] Since the current in the vehicle environment fluctuates greatly, especially in the case of high current and instantaneous large current in the chassis circuit, the use of flat wire 5 can effectively improve the current carrying capacity and avoid overheating and current saturation.

[0023] The flat conductor 5 design can reduce the size of the inductor, thereby providing greater current handling capacity in a limited space; its structure can also effectively reduce electromagnetic interference while maintaining a high inductance value and a low DC resistance, thereby improving the overall circuit efficiency; the combination of the common-mode inductor and the flat conductor 5 in the vehicle chassis circuit can also help reduce current harmonics, reduce the impact of high-frequency noise on other circuits, and further enhance the stability and durability of the vehicle electronic system.

[0024] The silicone strip 6 is used to fix the double-column magnetic core 2 and the I-type magnetic core 3, and at the same time, can meet the reliability vibration.

[0025] The magnetic fluid is stored inside the magnetic flow area 37, and the hydraulic oil is stored inside the hydraulic area 38. The magnetic fluid and the hydraulic oil are separated by the magnetic piston 8; the hydraulic push plate 11 is used to shorten the distance between the double-column magnetic core 2 and the I-type magnetic core 3; the heat sink 14 and the heat sink 15 are used to dissipate heat inside the housing 1 to prevent the temperature inside the housing 1 from being too high.

[0026] The flat wire 5 is energized on the double-column magnetic core 2 and the I-type magnetic core 3, and the flat wire 5 is a large current, which generates a strong magnetic field. The magnetic field can make the magnetic fluid flow toward the magnetic poles. The magnetic field attracts the magnetic fluid and pushes the magnetic piston 8 to move, further compressing the hydraulic area 38, and the hydraulic oil inside the hydraulic area 38 is discharged.

[0027] In actual application, this embodiment adopts a double-column magnetic core 2 and an I-type magnetic core 3 structure, combined with a mirror splicing process, and performs an appearance spraying treatment to achieve excellent appearance and durability; the high conductivity of the double-column magnetic core 2 and the I-type magnetic core 3 is fully utilized to ensure that the electrical performance can meet the requirements of efficient current transmission and effectively reduce energy loss; the mirror splicing process not only ensures the precise docking of the magnetic core, but also improves its ability to resist electromagnetic interference and enhances the overall performance of the inductor.

[0028] In order to meet the high current requirements, a flat wire 5 is used as a conductor; compared with the traditional round wire, the flat wire 5 can provide a larger conductive area in structure, and has lower resistance and better thermal management performance, thereby ensuring that the inductor can operate stably in a high current working environment while reducing power loss and temperature rise problems; the flat wire 5 also helps to reduce the electromagnetic radiation of the current and further improve the anti-interference performance.

[0029] The housing 1 is designed as an integrated terminal 4, which is tightly and flatly attached to the housing 1 and connected via a flat pad, thus perfectly realizing the planar integrated design of the terminal 4 and the housing 1, and meeting the requirements of modern electrical equipment for space optimization and efficient connection; this design not only ensures the stability and reliability of the electrical connection, but also enables the entire inductor to have higher vibration resistance and lower structural height, thus meeting the requirements of the vehicle circuit for limited space.

[0030] The bottom plate firmly fixes the magnetic core through point silicone, ensuring that the double-column magnetic core 2 and the I-type magnetic core 3 are not affected by vibration during operation and maintain stable electromagnetic performance; the pins and the shell 1 are connected by high-frequency welding technology and firmly fixed by bonding, ensuring the reliability and durability of the welding points; this structural design not only improves the vibration reliability of the inductor, but also ensures its stability in long-term operation, and can maintain efficient and stable electrical performance even in the complex environment of the vehicle system.

[0031] The present invention mainly makes full use of the core air gap from the perspective of the core structure, as well as a flat coil winding structure with good heat dissipation and high automation; it makes full use of the customer's limited packaging space to make the product package small, the current large, the power high, and effectively improve the product's power usage.

[0032] As a preferred embodiment of the present invention, it also includes a magnetic dynamic auxiliary component, and the magnetic dynamic auxiliary component includes: The limiting protrusion 18 is fixed in the magneto-tube 7 and is located at both ends of the magneto-tube 7; the limiting groove 19 is provided on the side of the magneto-piston 8 close to the limiting protrusion 18; the first rubber strip groove 20 is provided on the outer side of the magneto-piston 8; the first sealing rubber ring 21 is fixed in the first rubber strip groove 20.

[0033] The magnetic auxiliary assembly also includes: a limit plate 22 fixed to the inner side of the hydraulic cylinder 10; a liquid expansion groove 23 provided in the hydraulic cylinder 10; a second rubber strip groove 24 provided on the outer side of the hydraulic push plate 11; a second sealing rubber ring 25 fixed in the second rubber strip groove 24; The two ends of the liquid distributing tube 26 are fixed on the magnetomotive tube 7; the liquid collecting tube 27 is fixed on the liquid distributing tube 26 and is located in the shell 1; the delivery tube 28 is fixed at one end on the end of the liquid collecting tube 27 away from the liquid distributing tube 26, and the other end is fixed on the hydraulic cylinder 10.

[0034] Specifically, the distance between the limiting convex ring 18 and the adjusting sleeve 13 is the movable range of the magnetic piston 8. The liquid distribution pipe 26, the liquid collection pipe 27 and the delivery pipe 28 can supply hydraulic oil to the hydraulic cylinder 10 and the hydraulic push plate 11. The hydraulic push plate 11 will accordingly extend a certain length to squeeze the air gap between the double-column magnetic core 2 and the I-type magnetic core 3, thereby increasing the magnetic flux density of the magnetic core and improving the total inductance value of the inductor; by reducing the air gap, the saturation current capacity of the magnetic core is improved; squeezing the air gap helps to improve the coupling effect between the magnetic cores and ensure that the magnetic flux is more evenly distributed in the magnetic core; the smaller the air gap, the less likely the magnetic core is to enter a saturation state when working at high current, thereby ensuring the stability of the inductor in a high current environment and avoiding a sudden drop in the inductance value due to core saturation.

[0035] In the actual application of this embodiment, the magnetic fluid has a certain magnetic property, which affects the normal operation of the common-mode inductor to a certain extent. In order to avoid affecting the normal operation of the common-mode inductor, the magnetic fluid is selected as follows: The magnetic fluid is a mixture of magnetic particles and silicone oil-based liquid, in which the volume concentration of magnetic particles ranges from 6% to 8%; the particle size of the selected magnetic particles is between 100nm and 300nm, ensuring that it is small enough to avoid interference with the internal magnetic field of the inductor, while ensuring the fluidity and stability of the fluid; the relative magnetic permeability (μr) of the magnetic fluid ranges from 800 to 900, with a low magnetic response to avoid affecting the magnetic field distribution of the magnetic core when the inductor is working; its saturation magnetization intensity is controlled below 0.1T to ensure that the fluid will not The magnetic fluid enters the magnetic saturation state, thus avoiding the impact on the inductor performance; the magnetization intensity (M) is maintained below 10²A / m, which ensures that the magnetic response of the magnetic fluid will not cause excessive disturbance to the working state of the inductor; the viscosity of the magnetic fluid is set between 1-10cP to ensure that it has good fluidity and will not produce excessive resistance inside the inductor; the temperature adaptability range is 200℃-300℃, ensuring that the magnetic fluid can still maintain stable performance in a high temperature environment, avoiding performance degradation or instability of the fluid caused by temperature changes.

[0036] The magnetic fluid can drive the movement of the magnetic piston 8 as follows: When current passes through the flat conductor 5, a ring-shaped magnetic field is generated around the conductor, and this magnetic field will be transmitted to the double-column magnetic core 2 and the I-type magnetic core 3, and a strong magnetic field will be formed at both ends of the magnetic core and around the current path; the magnetic field strength is concentrated at both ends of the magnetic core to form a strong magnetic field area; under the action of this strong magnetic field, the fine magnetic particles in the magnetic fluid will respond to the changes in the magnetic field and rearrange along the magnetic field lines to produce a macroscopic magnetic response; the magnetic particles in the magnetic fluid will be concentrated in the area with stronger magnetic field, and driven by the magnetic force, flow in the direction of greater magnetic field intensity; as the magnetic field generated by the current acts on the magnetic fluid in the straight tube, the magnetic particles in the fluid are acted upon by the force in the magnetic field and gradually migrate to the area with stronger magnetic field, thereby enabling the magnetic fluid to drive the movement of the magnetic piston 8.

[0037] When the current is small, the magnetic field generated is weak, the arrangement degree of magnetic particles in the magnetic fluid is low, the driving effect of the magnetic field on the particles is small, the force pushing the magnetic piston 8 to produce displacement is small, and the reset spring 9 can resist the pushing effect; when the current is large, the magnetic field generated by the current becomes stronger, and the magnetic particles in the magnetic fluid will respond more obviously to changes in the external magnetic field. Under the action of the strong magnetic field, the degree of rearrangement of the particles in the magnetic fluid increases, and the migration speed of the particles is correspondingly accelerated. The force pushing the magnetic piston 8 is large, and the reset spring 9 can be compressed.

[0038] As a preferred embodiment of the present invention, it also includes an auxiliary adjustment component, and the auxiliary adjustment component includes: The hydraulic threaded tube 29 has one end fixed in the magnetotropic tube 7 and the other end threaded into the adjusting sleeve 13 and located at both ends of the magnetotropic tube 7; the stabilizing plate 30 is fixed on the adjusting sleeve 13; the hexagonal rod 31 is fixed on the adjusting cone rod 12; the slide tube 32 has one end slidably sleeved on the hexagonal rod 31 and the other end sliding on the stabilizing plate 30; the adjusting gear 33 is fixed on the slide tube 32.

[0039] The auxiliary adjustment component also includes: an outer gear ring 34 fixed on the adjustment sleeve 13 and meshing with the adjustment gear 33; a retaining ring 35 fixed on both sides of the outer gear ring 34; a rubber sheet 36 fixed on the magnetic piston 8 and located on the side of the magnetic piston 8 away from the limiting convex ring 18.

[0040] Specifically, by adjusting the rotation of the gear 33, the outer gear ring 34 and the adjusting sleeve 13 are driven to rotate, so that the adjusting sleeve 13 is screwed in or out on the hydraulic threaded tube 29, thereby achieving the goal of increasing or decreasing the distance between the limit cam 18 and the adjusting sleeve 13, so as to adjust the movable range of the magnetic piston 8 in the hydraulic area 38, and further adjust the amount of hydraulic oil discharged in the hydraulic area 38, thereby affecting the length of the hydraulic push plate 11 when the hydraulic push plate 11 is extended.

[0041] As a preferred embodiment of the present invention, it also includes a heat dissipation auxiliary component, and the heat dissipation auxiliary component includes: The movable groove 39 is provided in the heat dissipation plate 14 and communicated with the heat dissipation groove 15; the movable spring 40 has one end fixed in the movable groove 39 and the other end fixed on the opening and closing plate 16; the pulling plate 41 is fixed on the opening and closing plate 16; the displacement frame 42 is fixed on the pulling plate 41.

[0042] The heat dissipation auxiliary components also include: an air pressure tube 43, fixed above the ammonia liquid box 17 and located on both sides of the ammonia liquid box 17; a pneumatic piston 44, sliding in the air pressure tube 43; a push rod 45, one end of which is fixed above the pneumatic piston 44 and the other end is fixed on the displacement frame 42; a heat sink 46, embedded in the heat sink 14; a gas pipe 47, one end of which is fixed on the air pressure tube 43 and the other end is fixed on the heat sink 46.

[0043] The heat dissipation auxiliary component also includes: a liquid return pipe 48, which is fixed above the ammonia liquid box 17 and is located on both sides of the ammonia liquid box 17; a reflux pipe 49, one end of which is fixed on the liquid return pipe 48 and the other end is fixed on the heat sink 46; a liquid stop ring 50, which is fixed in the liquid return pipe 48; a spring ring seat 51, which is fixed in the liquid return pipe 48 and is located above the liquid stop ring 50; a liquid return spring 52, which is fixed on the spring ring seat 51; and a floating valve ball 53, which is fixed on the liquid return spring 52 and is located above the liquid stop ring 50.

[0044] Specifically, by installing the heat sink 14 in the direction in which the common mode inductor is installed, the ammonia liquid box 17, the air pressure pipe 43 and the liquid return pipe 48 are always kept facing upward during operation.

[0045] Working principle, adopting double-column magnetic core 2 and I-type magnetic core 3 structure, mirror splicing, exterior spraying, making full use of the high conductivity of the magnetic core to meet the electrical performance requirements; the flat wire 5 can pass large current; the silicone strip 6 is firmly fixed to ensure that the double-column magnetic core 2 and I-type magnetic core 3 are not affected by vibration during operation and maintain stable electromagnetic performance. The shell 1 has a simple structure, and the magnetic core structure fully utilizes the core air gap to increase the magnetic flux density of the core and improve the total inductance value of the inductor; the overall heat dissipation is good and the flat coil winding structure with high automation; make full use of the customer's limited packaging space to make the product package small, the current large, the power high, and effectively improve the product's power usage.

[0046] When a large current passes through the flat wire 5, a ring-shaped magnetic field is generated around the wire, and a strong magnetic field is formed at both ends of the magnetic core and around the current path. The magnetic field formed by the flat wire 5 rearranges the fine magnetic particles in the magnetic fluid. The magnetic particles in the magnetic fluid are concentrated in the area with a strong magnetic field and driven by the magnetic force, thereby pushing the magnetic piston 8 to move toward the hydraulic area 38. The magnetic piston 8 squeezes the hydraulic oil in the hydraulic area 38. The magnetic piston 8 compresses the reset spring 9. The hydraulic oil enters the hydraulic cylinder 10 from the adjusting sleeve 13, the hydraulic threaded pipe 29, the liquid distribution pipe 26, the liquid collection pipe 27 and the delivery pipe 28. The hydraulic oil in the hydraulic cylinder 10 pushes the hydraulic push plate 11 out of the hydraulic cylinder 10. The hydraulic push plate 11 squeezes the air gap between the double-column magnetic core 2 and the I-type magnetic core 3, which will reduce the distance between the air gaps. The advantages of reducing the distance between the air gaps are as follows: Increasing the inductance value and reducing the size of the air gap can increase the magnetic flux density of the magnetic core and improve the total inductance of the inductor, which can effectively enhance its filtering ability for high-frequency noise, thereby improving electromagnetic compatibility and reducing electromagnetic interference; enhancing the magnetic field coupling effect, squeezing the air gap helps to improve the coupling effect between the magnetic cores, ensure that the magnetic flux is more evenly distributed in the magnetic core, improve the overall efficiency of the inductor, and reduce energy loss caused by magnetic field leakage; improving the saturation current capability, by reducing the air gap, the saturation current capability of the magnetic core is improved, the smaller the air gap, the magnetic core is not easy to enter the saturation state when working at high current, thereby ensuring that the inductor is in a high current environment Improve the stability of the inductance value and avoid a sudden drop in inductance due to core saturation; improve temperature rise control. The reduction of the air gap helps to improve the overall thermal management performance of the core, helps to optimize the heat dissipation performance of the inductor, and reduce the temperature rise during operation; enhance vibration resistance and mechanical stability. Through proper air gap adjustment, the contact between the cores is closer, increasing the mechanical stability of the core, and avoiding performance degradation due to vibration or impact in the vehicle environment; optimize high-frequency characteristics. Reducing the air gap can also improve the high-frequency response of the inductor and reduce the distortion and attenuation of the signal at high frequencies, thereby improving the performance of the inductor in high-frequency signal filtering and improving the stability and performance of the vehicle-mounted system.

[0047] As the current of the flat conductor 5 increases, the magnetic field strength also increases, and the force of the magnetic field on the magnetic fluid increases, thereby increasing the force of the magnetic fluid pushing the magnetic piston 8; the magnetic piston 8 pushes the hydraulic area 38 to increase, thereby increasing the force of squeezing the hydraulic oil; after the initial force passes through the hydraulic area 38, the liquid distribution pipe 26, the liquid collection pipe 27, the delivery pipe 28 and the hydraulic cylinder 10, the hydraulic force is amplified, and finally the force applied by the hydraulic push plate 11 is also enhanced. The hydraulic push plate 11 can enhance the force of squeezing the double-column magnetic core 2 and the I-type magnetic core 3.

[0048] Insert the hexagonal wrench into the hexagonal hole of the adjusting cone rod 12, and the rotation of the hexagonal wrench drives the rotation of the adjusting cone rod 12, and the rotation of the adjusting cone rod 12 drives the rotation of the hexagonal rod 31, and the rotation of the hexagonal rod 31 drives the rotation of the slide 32, and the rotation of the slide 32 drives the rotation of the adjusting gear 33, and the rotation of the adjusting gear 33 drives the rotation of the outer gear ring 34, and the rotation of the outer gear ring 34 drives the rotation of the adjusting sleeve 13, and the rotation of the adjusting sleeve 13 performs a screwing forward or backward movement on the hydraulic threaded tube 29, and the adjusting sleeve 13 and the total length of the adjusting sleeve 13 will be extended or shortened. By adjusting this length, the moving space of the magnetic piston 8 is limited, thereby adjusting the total amount of hydraulic oil discharged in the hydraulic area 38, thereby adjusting the force of the hydraulic push plate 11 to squeeze the double-column magnetic core 2 and the I-type magnetic core 3.

[0049] When no current passes through the flat wire 5, the reset spring 9 resets the magnetic piston 8, the hydraulic oil inside the hydraulic cylinder 10 will flow back to the hydraulic area 38, the magnetic piston 8 resets to the limit convex ring 18, and the magnetic fluid regroups with the displacement of the magnetic piston 8.

[0050] The length of the hydraulic threaded tube 29 is the final limit to the position of the magnetic piston 8, avoiding the gap between the double-column magnetic core 2 and the I-type magnetic core 3 to be too small, resulting in a decrease in the saturation magnetic flux density. A too small core gap leads to too high a magnetic flux density, exceeding the saturation point of the core, causing the core to operate in a saturated state. After saturation, the core cannot effectively store more magnetic energy, resulting in a decrease in the performance of the inductor and affecting its normal operation. A too small gap leads to an increase in magnetic flux leakage, resulting in an increase in the power loss of the system and a decrease in efficiency. A too small gap causes the core to work unstably and generate excessive heat.

[0051] When the common-mode inductor is working, the internal temperature of the inductor gradually increases, the ammonia liquid box 17 absorbs the internal heat, and the liquid ammonia inside the ammonia liquid box 17 is converted into gaseous ammonia. The gaseous ammonia enters the air pressure tube 43, and the gaseous ammonia pushes the pneumatic piston 44 to move upward. The pneumatic piston 44 drives the push rod 45 to move, and the push rod 45 drives the displacement frame 42. The displacement frame 42 drives the pulling plate 41, and the pulling plate 41 drives the opening and closing plate 16 to move along the movable groove 39. The opening and closing plate 16 opens at the heat dissipation groove 15 to facilitate the heat dissipation inside the common-mode inductor.

[0052] The opening and closing degree of the opening and closing plate 16 in the heat dissipation slot 15 is controlled by the change of the internal temperature of the common mode inductor to dissipate the heat inside the common mode inductor.

[0053] The displacement height of the pneumatic piston 44 exceeds the position of the gasification pipe 47 in the air pressure pipe 43, and the gaseous ammonia enters the gasification pipe 47, and then enters the heat sink 46 from the gasification pipe 47. The heat sink 46 is located on the outside of the common mode inductor, and heat is dissipated through the heat sink 46. At this time, the gaseous ammonia condenses into liquid ammonia, and the liquid ammonia flows back into the reflux pipe 49, and then enters the return liquid pipe 48 from the reflux pipe 49. The liquid ammonia accumulates in the return liquid pipe 48, and the floating valve ball 53 floats up. The floating valve ball 53 is separated from the stop ring 50, and the liquid ammonia flows back to the ammonia liquid box 17, thereby achieving the purpose of heat dissipation.

[0054] The above is a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. Car chassis circuit chip common mode inductor, including: The housing and the double-column magnetic core and the I-type magnetic core arranged in the housing are characterized by further comprising: The terminal is fixed on the upper part of the shell, and the flat wire is wound around the two sides of the double-column magnetic core, and the terminal is located inside the terminal; the silicone strip is fixed inside the shell and is used to bond the double-column magnetic core and the I-type magnetic core; There are two magneto-tubes, which are fixed on the housing and located at the bottom of the housing, and are used to store magnetic fluid and hydraulic oil; a magnetic piston slides on both ends of the magneto-tube and is located inside the magneto-tube; a reset spring is fixed on both ends of the magneto-tube and is located inside the magneto-tube and fixed to the magnetic piston, and is used to reset the magnetic piston; The hydraulic cylinder is fixed on both sides of the shell; the hydraulic push plate slides in the hydraulic cylinder; An adjusting cone rod, one end of which is rotatably arranged on the housing and the other end of which is rotatably arranged on the magnetotropic tube, is used to adjust the range of motion of the magnetotropic piston in the magnetotropic tube; two adjusting sleeves are arranged on the inner side of the same magnetotropic tube and are located in the reset spring, which are used to limit the displacement of the magnetotropic piston; A heat sink is fixed on both sides of the shell; there are multiple heat sinks, which are all opened on the heat sink and arranged in a matrix for dissipating heat in the shell; there are multiple opening and closing plates, which are all slid in the heat sink and are used to adjust the opening degree of the heat sink opening; an ammonia liquid box is fixed in the shell and is located on both sides of the shell.

2. The common-mode chip inductor for chassis circuit of vehicle according to claim 1, characterized in that: It also includes a magnetic dynamic auxiliary component, which includes: The limiting convex ring is fixed in the magnetotropic tube and is located at both ends of the magnetotropic tube; the limiting groove is arranged on the side of the magnetotropic piston close to the limiting convex ring; the first rubber strip groove is arranged on the outer side of the magnetotropic piston; the first sealing rubber ring is fixed in the first rubber strip groove.

3. The common-mode chip inductor for a vehicle chassis circuit according to claim 2, characterized in that: The magnetic auxiliary component also includes: The limit plate is fixed on the inner side of the hydraulic cylinder; the expansion groove is provided in the hydraulic cylinder; the second rubber strip groove is provided on the outer side of the hydraulic push plate, and the second sealing rubber ring is fixed in the second rubber strip groove; The two ends of the liquid distributing tube are fixed on the magnetomotive tube; the liquid collecting tube is fixed on the liquid distributing tube and is located in the shell; the conveying tube has one end fixed on the end of the liquid collecting tube away from the liquid distributing tube and the other end fixed on the hydraulic cylinder.

4. The common-mode chip inductor for a vehicle chassis circuit according to claim 1, characterized in that: Also included is an auxiliary adjustment component, the auxiliary adjustment component comprising: The hydraulic threaded tube has one end fixed in the magnetic tube and the other end threaded into the adjusting sleeve and located at both ends of the magnetic tube; the stabilizing plate is fixed on the adjusting sleeve; the hexagonal rod is fixed on the adjusting cone rod; the slide tube has one end slidingly sleeved on the hexagonal rod and the other end sliding on the stabilizing plate; the adjusting gear is fixed on the slide tube.

5. The common-mode chip inductor for chassis circuit of vehicle according to claim 4, characterized in that: The auxiliary adjustment component also includes: The outer gear ring is fixed on the adjusting sleeve and meshes with the adjusting gear; the retaining ring is fixed on both sides of the outer gear ring; the rubber sheet is fixed on the magnetic piston and is located on the side of the magnetic piston away from the limiting convex ring.

6. The common-mode chip inductor for a vehicle chassis circuit according to claim 1, characterized in that: A magnetic flow area is provided at the middle of the magneto-tube for storing magnetic fluid, and hydraulic areas are provided at both ends of the magneto-tube for storing hydraulic oil.

7. The common-mode chip inductor for a vehicle chassis circuit according to claim 1, characterized in that: Also included is a heat dissipation auxiliary component, the heat dissipation auxiliary component comprising: The movable groove is arranged in the heat dissipation plate and communicated with the heat dissipation groove; one end of the movable spring is fixed in the movable groove and the other end is fixed on the opening and closing plate; the pulling plate is fixed on the opening and closing plate; and the displacement frame is fixed on the pulling plate.

8. The common-mode chip inductor for chassis circuits of a vehicle according to claim 7, characterized in that: The heat dissipation auxiliary component also includes: The air pressure tube is fixed above the ammonia liquid box and is located on both sides of the ammonia liquid box; the pneumatic piston slides in the air pressure tube; the push rod has one end fixed above the pneumatic piston and the other end fixed on the displacement frame; the heat sink is embedded in the heat sink; the gas pipe has one end fixed on the air pressure tube and the other end fixed on the heat sink.

9. The common-mode chip inductor for chassis circuit of vehicle according to claim 8, characterized in that: The heat dissipation auxiliary component also includes: The liquid return pipe is fixed above the ammonia liquid box and located on both sides of the ammonia liquid box; the reflux pipe has one end fixed on the liquid return pipe and the other end fixed on the heat sink; the liquid stop ring is fixed in the liquid return pipe; the spring ring seat is fixed in the liquid return pipe and located above the liquid stop ring; the liquid return spring is fixed on the spring ring seat; the floating valve ball is fixed on the liquid return spring and located above the liquid stop ring.

10. The common-mode chip inductor for a vehicle chassis circuit according to claim 1, characterized in that: The outer side of the shell is provided with a wiring installation groove, which is compatible with the terminal. The outer side of the shell is provided with a hydraulic installation groove, which is compatible with the hydraulic cylinder. The outer side of the shell is provided with a heat dissipation installation groove, which is compatible with the heat dissipation plate. The outer side of the shell is provided with an adjustment installation groove, which is compatible with the adjustment cone rod.

Images