Alternating current end filter of new energy electric vehicle

Abstract

The utility model discloses an AC end filter for a new energy electric vehicle, and belongs to the technical field of filters. Comprising an insulating shell, the insulating shell comprises a first outer ring and a first inner ring located on the inner side of the first outer ring, and the first outer ring and the first inner ring form a first annular cavity; the magnetic ring is located in the first annular cavity; the end cover is located above the insulating shell, the end cover comprises a second outer ring and a second inner ring located on the inner side of the second outer ring, and the second outer ring and the second inner ring form a second annular cavity; and the end cover is in buckled connection with the insulating shell. The beneficial effects of the technical scheme are that the end cover and the housing are in buckle connection to protect the magnetic ring, vibration impact can be prevented, the structure is compact, the space utilization rate is high, and the filtering effect is good.

Description

Technical Field

[0001] The utility model relates to the technical field of filters, in particular to an AC end filter for a new energy electric vehicle. Background Art

[0002] The motor controller in new energy electric vehicles will generate electromagnetic interference (EMI) of various frequencies, which may affect the electronic system, communication equipment and surrounding radio equipment of the electric vehicle. Filters are usually used to suppress electromagnetic interference.

[0003] In the prior art, the magnetic ring of the filter is easily affected by external vibration and impact, which may cause the magnetic ring to shift or be damaged, thus affecting the performance and stability of the filter. It is also difficult to ensure that the EMI interference generated by the normal operation of the car meets the requirements of the international automotive standard CISPR25 and the national standard GB / T18655. Utility Model Content

[0004] The purpose of this utility model is to provide a new energy electric vehicle AC end filter to solve the above technical problems;

[0005] New energy electric vehicle AC end filter, including:

[0006] An insulating housing, the insulating housing comprising a first outer ring and a first inner ring located inside the first outer ring, the first outer ring and the first inner ring forming a first annular cavity;

[0007] A magnetic ring, located in the first annular cavity;

[0008] an end cover, located above the insulating housing, the end cover comprising a second outer ring and a second inner ring located inside the second outer ring, the second outer ring and the second inner ring forming a second annular cavity;

[0009] The end cover is snap-connected to the insulating shell.

[0010] Preferably, snap grooves are provided on the first outer ring and the first inner ring.

[0011] Preferably, the second outer ring and the second inner ring are provided with snap protrusions matching the snap grooves.

[0012] Preferably, mounting holes are provided on the sides and bottom of the insulating shell.

[0013] Preferably, a knurled insert is correspondingly provided in each of the mounting holes.

[0014] Preferably, the insulating shell and the end cover are polyphenylene sulfide plastic shells.

[0015] Preferably, the magnetic ring is a soft solidified nanocrystalline magnetic ring.

[0016] Preferably, a two-component insoluble epoxy glue is provided between the magnetic ring and the insulating shell.

[0017] Preferably, a three-phase power line is arranged at the central through hole of the AC end filter of the new energy electric vehicle to form a filter test loop.

[0018] The utility model has the beneficial effects of: adopting the end cover and the shell buckle connection to protect the magnetic ring, preventing vibration and impact, having a compact structure, high space utilization rate and good filtering effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is an exploded diagram of the AC end filter of the new energy electric vehicle of the utility model;

[0020] Figure 2 This is the main view of the AC end filter of the new energy electric vehicle of the utility model;

[0021] Figure 3 It is a side view of the AC end filter of the new energy electric vehicle of the utility model;

[0022] Figure 4 It is a test circuit schematic diagram of the AC end filter of the new energy electric vehicle of the utility model.

[0023] In the accompanying drawings: 1. Insulating shell; 11. First outer ring; 12. First inner ring; 13. Snap groove; 2. Magnetic ring; 3. End cover; 31. Second outer ring; 32. Second inner ring; 33. Snap protrusion; 4. Mounting hole; 5. Knurled insert. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0026] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but they are not intended to limit the present invention.

[0027] New energy electric vehicle AC end filter, such as Figures 1 to 3 As shown, including

[0028] An insulating housing 1, wherein the insulating housing 1 comprises a first outer ring 11 and a first inner ring 12 located inside the first outer ring 11, wherein the first outer ring 11 and the first inner ring 12 form a first annular cavity;

[0029] A magnetic ring 2, located in the first annular cavity;

[0030] An end cover 3 is located above the insulating housing 1, and the end cover 3 includes a second outer ring 31 and a second inner ring 32 located inside the second outer ring 31, and the second outer ring 31 and the second inner ring 32 form a second annular cavity;

[0031] The end cover 3 is snap-connected to the insulating housing 1 .

[0032] Specifically, the utility model provides a new energy electric vehicle AC end filter, which adopts an end cover 3 and an insulating shell 1 to protect a magnetic ring 2 through a snap-on design, can prevent vibration and impact, has a compact structure, high space utilization, and good filtering effect.

[0033] In a preferred embodiment, the first outer ring 11 and the first inner ring 12 are provided with snap-fit ​​grooves 13;

[0034] The second outer ring 31 and the second inner ring 32 are provided with buckle protrusions 33 matching the buckle grooves 13 .

[0035] Specifically, the design of the buckle groove 13 and the buckle protrusion 33 allows the outer ring and the inner ring to be easily aligned and connected, achieving fast and reliable assembly. It is easier to operate than traditional threads or other fixing methods, saving assembly time and cost.

[0036] More specifically, the matching design of the buckle protrusion 33 and the buckle groove 13 provides good structural stability. Once the buckle connection is completed, it can effectively resist external vibration and impact, thereby maintaining the relative position between the components and the stability of the overall structure. The risk of loosening or falling off due to vibration or external force can be reduced. The firmness of the connection can be maintained during long-term use, reducing the need for maintenance and repair, and improving the reliability and service life of the overall components.

[0037] In a preferred embodiment, the side and bottom of the insulating housing 1 are provided with mounting holes 4;

[0038] A knurled insert 5 is correspondingly provided in each mounting hole 4 .

[0039] Specifically, the design of the mounting hole 4 and the knurled insert 5 enables the insulating housing 1 to be firmly mounted at a desired position. The knurled insert 5 is generally used to increase the adhesion and fixing force of the thread, and can effectively prevent the housing from loosening or shifting due to vibration or other external forces during use.

[0040] More specifically, using the knurled insert 5 to install the insulating housing 1 is usually simpler and faster than other methods, which can save time and labor costs and help improve the compactness and stability of the overall structure of the insulating housing 1.

[0041] In a preferred embodiment, the insulating shell 1 and the end cover 3 are polyphenylene sulfide plastic shells.

[0042] Specifically, polyphenylene sulfide PPS has excellent heat resistance and can maintain structural stability and mechanical strength in high temperature environments. It can also resist corrosion from many chemicals, including lubricants, coolants, and chemicals in batteries and electric drive systems that may be encountered in automobiles, ensuring the long-term stability and reliability of the filter in harsh environments.

[0043] Specifically, PPS has high strength and good rigidity, which enables it to withstand stress from vibration and mechanical shock in actual use, protecting internal electronic components from damage. It can maintain dimensional stability at different temperatures, which is conducive to the precise processing and assembly of complex parts.

[0044] More specifically, PPS can reduce the overall weight of the filter while ensuring strength and durability, helping to reduce the overall energy consumption of electric vehicles and improve driving efficiency.

[0045] In a preferred embodiment, the magnetic ring 2 is a soft solidified nanocrystalline magnetic ring.

[0046] Specifically, nanocrystalline materials have excellent magnetic permeability and low magnetic loss characteristics. When the filter is working, the magnetic ring 2 can effectively guide and concentrate the magnetic field, while reducing the energy loss caused by hysteresis and eddy current effects, and improving the efficiency and energy utilization of the circuit. Nanocrystalline magnetic rings usually have a high saturation magnetic induction intensity and can maintain stable magnetic properties under high current or frequency conditions.

[0047] Specifically, due to its high magnetic permeability and low loss characteristics, nanocrystalline materials can be designed into a smaller and lighter magnetic ring structure, which helps to reduce the overall size and weight of the filter and improve the energy efficiency and driving efficiency of electric vehicles.

[0048] More specifically, nanocrystalline materials have good thermal stability and corrosion resistance, and can maintain stable performance under various operating temperatures and environmental conditions, allowing electric vehicle AC-end filters to operate reliably for a long time, reducing the need for maintenance and replacement.

[0049] In a preferred embodiment, a two-component non-soluble epoxy adhesive is provided between the magnetic ring 2 and the insulating shell 1 .

[0050] Specifically, the epoxy adhesive can effectively fill and seal the gap between the magnetic ring 2 and the insulating housing 1 to form a strong mechanical connection, which can effectively prevent the magnetic ring 2 from shifting or loosening due to vibration or impact during operation, thereby ensuring the stability and reliability of the internal components of the filter.

[0051] More specifically, epoxy adhesive can absorb and disperse the impact force caused by road vibration and collision during vehicle driving, reduce the impact of these external forces on the internal components of the filter, and help extend its service life. Epoxy adhesive itself has good electrical insulation performance, can effectively isolate the voltage gradient between the magnetic ring 2 and the insulating housing 1, and prevent electrical short circuit and leakage. In addition, epoxy adhesive can also effectively prevent water and moisture from entering the interior of the filter, keeping its electronic components dry and stable.

[0052] More specifically, the selection of appropriate epoxy adhesive can ensure that it has good high temperature resistance and chemical corrosion resistance. Two-component non-soluble epoxy adhesive usually has a long operation time and appropriate curing time, which is convenient for precise coating and assembly operations on the production line, can simplify the filter manufacturing process, improve assembly efficiency, and reduce production costs.

[0053] In a preferred embodiment, referring to Figure 4 A three-phase power line is set at the central through hole of the AC end filter of the new energy electric vehicle to form a filter test loop. The red coil is the AC end filter of the new energy electric vehicle. The electrical parameter test can be carried out simply and directly, and it is highly feasible.

[0054] Specifically, by observing the signal changes on the power line, the filter's filtering performance under different frequencies and load conditions can be analyzed, and the filter design and parameter settings can be optimized. The test loop can be used to verify the filter's electrical performance, including its ability to suppress high-frequency noise on the power line and its ability to transmit the main power frequency. The filter's filter components or design can be adjusted and optimized to improve overall performance.

[0055] In the first embodiment, if Figures 1 to 4 As shown,

[0056] The insulating housing 1 comprises a first outer ring 11 and a first inner ring 12 located inside the first outer ring 11, wherein the first outer ring 11 and the first inner ring 12 form a first annular cavity; the magnetic ring 2 is located in the first annular cavity;

[0057] The end cover 3 is located above the insulating housing 1. The end cover 3 includes a second outer ring 31 and a second inner ring 32 located inside the second outer ring 31. The end cover 3 is snap-connected to the insulating housing 1.

[0058] The first outer ring 11 and the first inner ring 12 are provided with a dense number of buckle grooves 13, and the buckle grooves 13 are V-shaped;

[0059] The second outer ring 31 and the second inner ring 32 are provided with buckle protrusions 33 matching the buckle grooves 13 .

[0060] The overall shape of the AC end filter of the new energy electric vehicle can be deformed into a circle or other shapes according to the magnetic ring 2.

[0061] Specifically, the snap-on design of the end cap 3 and the insulating shell 1 can protect the magnetic ring 2. Through the V-shaped groove and increasing the number of grooves and protrusions, it can effectively prevent vibration and impact. It has a compact structure, high space utilization, and good filtering effect. A filter loop test method passing through the center of the magnetic ring 2 is adopted, and the electrical test is stable and has strong versatility. The above-mentioned product structure and production process are simple, and the automation feasibility is strong. The magnetic ring 2 uses a soft-cured nanocrystalline magnetic ring, and its inductance and impedance values ​​are highly reliable and consistent. The magnetic ring 2 and the shell assembly are fixed with a two-component non-soluble epoxy glue to prevent vibration and impact. PPS plastic shell material is adopted, which has high mechanical strength, high temperature resistance, oil resistance, good thermal stability, and excellent electrical properties.

[0062] The utility model is mainly used in the motor controller system of new energy electric vehicles. Its main function is to suppress and reduce the EMI electromagnetic interference generated by the automobile motor controller under different working conditions, reduce the impact on radio communication signals, and achieve the EMI interference of the automobile in normal working state to meet the requirements of the international automobile standard CISPR25 and the national standard GB / T18655, thereby protecting radio communication.

[0063] In summary, the present application provides a new energy electric vehicle AC end filter, which is connected to the shell through the end cover 3 and snap-fit ​​connection, can prevent vibration and impact, has a compact structure, high space utilization, and good filtering effect.

[0064] The above description is only a preferred embodiment of the present invention, and does not limit the implementation mode and protection scope of the present invention. For those skilled in the art, it should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the description and illustrations of the present invention should be included in the protection scope of the present invention.

Claims

1. New energy electric vehicle AC end filter, characterized in that: include, An insulating housing (1), the insulating housing (1) comprising a first outer ring (11) and a first inner ring (12) located inside the first outer ring (11), the first outer ring (11) and the first inner ring (12) forming a first annular cavity; A magnetic ring (2), located in the first annular cavity; an end cover (3) located above the insulating housing (1), the end cover (3) comprising a second outer ring (31) and a second inner ring (32) located inside the second outer ring (31), the second outer ring (31) and the second inner ring (32) forming a second annular cavity; The end cover (3) is snap-connected to the insulating housing (1).

2. The AC end filter of a new energy electric vehicle according to claim 1, characterized in that: The first outer ring (11) and the first inner ring (12) are provided with snap-fit ​​grooves (13).

3. The AC end filter of the new energy electric vehicle according to claim 2 is characterized in that: The second outer ring (31) and the second inner ring (32) are provided with snap-fit ​​protrusions (33) matching the snap-fit ​​grooves (13).

4. The AC end filter of a new energy electric vehicle according to claim 1, characterized in that: The side and bottom of the insulating housing (1) are provided with mounting holes (4).

5. The AC end filter of the new energy electric vehicle according to claim 4 is characterized in that: A knurled insert (5) is correspondingly provided in each of the mounting holes (4).

6. The AC end filter of a new energy electric vehicle according to claim 1, characterized in that: The insulating shell (1) and the end cover (3) are polyphenylene sulfide plastic shells.

7. The AC end filter of a new energy electric vehicle according to claim 1, characterized in that: The magnetic ring (2) is a soft solidified nanocrystalline magnetic ring.

8. The AC end filter of a new energy electric vehicle according to claim 1, characterized in that: A two-component insoluble epoxy glue is provided between the magnetic ring (2) and the insulating shell (1).

9. The AC end filter of a new energy electric vehicle according to claim 1, characterized in that: A three-phase power line is arranged at the central through hole of the AC end filter of the new energy electric vehicle to form a filter test loop.

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