CN113300588A - High-voltage filter - Google Patents
High-voltage filter Download PDFInfo
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- CN113300588A CN113300588A CN202110572996.3A CN202110572996A CN113300588A CN 113300588 A CN113300588 A CN 113300588A CN 202110572996 A CN202110572996 A CN 202110572996A CN 113300588 A CN113300588 A CN 113300588A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/44—Circuits or arrangements for compensating for electromagnetic interference in converters or inverters
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/40—Arrangements for reducing harmonics
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- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
- Filters And Equalizers (AREA)
Abstract
The invention discloses a high-voltage filter which is accommodated in a shell, wherein the shell is in a preset shape, the high-voltage filter comprises a filter support, a high-voltage magnetic ring, an X capacitor and a Y capacitor, and the high-voltage filter comprises: the high-voltage magnetic ring is arranged inside the filter bracket; the X capacitor is arranged on the filter bracket and used for inhibiting differential mode interference; the Y capacitor is arranged on the filter bracket and used for inhibiting common-mode interference; the outer layers of the high-voltage magnetic ring, the X capacitor and the Y capacitor are sealed through insulating layers. Compared with the prior art, the high-voltage filter disclosed by the invention is subjected to secondary injection molding by using the plastic with the shielding function after the insulating material is sealed, and the appearance of the shell formed by the secondary injection molding can be made into any shape according to the external requirement, so that the flexibility of the high-voltage filter is greatly improved, and the integration and miniaturization of the product are facilitated.
Description
Technical Field
The invention relates to the technical field of automobile parts, in particular to a high-voltage filter.
Background
Because high-voltage inverter equipment such as a motor controller, a generator controller and the like can generate a large amount of electromagnetic interference, the electromagnetic interference can be transmitted to other related devices through a high-voltage direct-current busbar and a cable, the stability of a system is reduced, and meanwhile, the equipment cannot meet related national electromagnetic compatibility standards.
Add filtering equipment in limited space, make female the arranging of high voltage direct current and the high frequency electromagnetic interference greatly reduced on the cable be a major challenge of electric drive system design, high voltage filter if do not have the shell then internal filter component easily receives the space radiation interference influence simultaneously, if install traditional metal casing additional, then the shape receives the restriction, does not accomplish the special-shaped shell and is convenient for install very hardly.
Disclosure of Invention
The invention aims to provide a high-voltage filter to solve the technical problems in the prior art.
The invention provides a high-voltage filter which is accommodated in a shell, wherein the shell is in a preset shape, the high-voltage filter comprises a filter support, a high-voltage magnetic ring, an X capacitor and a Y capacitor, and the high-voltage filter comprises:
the high-voltage magnetic ring is arranged inside the filter bracket;
the X capacitor is arranged on the filter bracket and used for inhibiting differential mode interference;
the Y capacitor is arranged on the filter bracket and used for inhibiting common-mode interference;
the outer layers of the high-voltage magnetic ring, the X capacitor and the Y capacitor are sealed through insulating layers.
In the high-voltage filter, it is preferable that the housing is formed by injection molding of plastic with a shielding function.
The high-voltage filter as described above preferably further comprises a metal gasket, a positive cable connecting metal sheet and a negative cable connecting metal sheet, wherein:
the X capacitor is connected with the positive cable connecting conducting strip and the negative cable connecting metal strip;
at least two metal gaskets are arranged;
the number of the Y capacitors is at least two; one of the Y capacitors is connected with the positive cable connecting metal sheet and one of the metal gaskets; and the other Y capacitor is connected with the negative cable connecting metal sheet and the other metal gasket.
A high voltage filter as described above, wherein preferably, the filter holder comprises a first face, a second face, and a ring face, the first face and the second face being symmetrically disposed, the ring face connecting the first face and the second face;
the Y capacitor, the metal gasket, the anode cable connection metal sheet and the cathode cable connection metal sheet are all arranged on the first surface;
be equipped with the mounting groove on the wave filter support, the X electric capacity is located in the mounting groove, anodal cable junction sheetmetal and negative pole cable junction sheetmetal set up the both sides at the X electric capacity along horizontal respectively.
As above, preferably, the second surface is provided with an accommodating cavity, and the high-voltage magnetic ring is installed in the accommodating cavity and sealed by potting adhesive.
In the high-voltage filter, preferably, two partition plates are disposed in the mounting groove, the two partition plates are symmetrically disposed, the number of the X capacitors is three, the three X capacitors are connected between the partition plates by welding, and the three X capacitors are connected in parallel.
In the high voltage filter, it is preferable that a mounting bracket is disposed on the second surface of the filter bracket, and one of the X capacitors protrudes from the mounting groove and is fixed to the mounting bracket.
In the high-voltage filter, preferably, the first surface of the filter holder extends outwards along both sides of the horizontal direction to form a lug, and the two metal gaskets are correspondingly mounted on the lugs on both sides.
In the high-voltage filter, preferably, two Y capacitors are provided, one of the Y capacitors is fixed between the positive cable connection metal piece and one of the metal pads by welding, and the other Y capacitor is fixed between the negative cable connection metal piece and the other metal pad by welding.
The high-voltage filter as described above, wherein preferably, a pin protection bracket is further disposed on the first surface of the filter bracket.
Compared with the prior art, the high-voltage cable and the bus bar high-frequency electromagnetic interference filter have the advantages that the high-voltage cable and the high-frequency electromagnetic interference in the bus bar are high in impedance through the filter structure formed by the high-voltage magnetic ring, the X capacitor and the Y capacitor, and the amplitude of the interference is reduced. The X capacitance between the positive and negative poles of the cable provides low impedance to differential mode electromagnetic interference between the positive and negative poles, so that the differential mode electromagnetic interference flows back into the controller. The Y-capacitance on the cable connector provides a low impedance return path for common mode emi, which therefore flows back into the controller. Through the cooperative work of the three main components, the amplitude of interference current flowing out of the electric drive system to an external circuit through a high-voltage cable and a busbar is greatly reduced. Meanwhile, the high-voltage filter is subjected to secondary injection molding by using plastic with a shielding function after being sealed by the insulating material, and the appearance of the shell formed by secondary injection molding can be made into any shape according to external requirements, so that the flexibility of the high-voltage filter is greatly improved, and the integration and miniaturization of products are facilitated.
Drawings
FIG. 1 is an isometric view of the invention in one orientation, wrapped in a housing;
FIG. 2 is an isometric view of the invention in another orientation, wrapped in a housing;
FIG. 3 is an isometric view of the invention in one orientation with the housing removed;
fig. 4 is an isometric view of the invention in another orientation with the housing removed.
Description of reference numerals:
10-shell, 11-filter support, 111-first surface, 112-second surface, 113-annular surface, 114-mounting groove, 115-containing cavity, 116-partition plate, 12-high voltage magnetic ring, 13-X capacitor, 14-Y capacitor, 15-metal gasket, 16-positive cable connecting metal sheet, 17-negative cable connecting metal sheet, 18-mounting support, 19-lug and 20-pin protection support.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative only and should not be construed as limiting the invention.
As shown in fig. 1 to 4, the present invention provides a high voltage filter, the high voltage filter is entirely accommodated in a housing 10, in this embodiment, the housing 10 may be formed in a predetermined shape, as shown in fig. 1 and 2, which are schematic diagrams of a shape of the housing 10, and an opening portion is formed thereon for exposing parts, but those skilled in the art can understand that the predetermined shape of the housing 10 may be designed according to an external space, thereby greatly improving flexibility of the high voltage filter.
Meanwhile, in order to overcome the technical problems that a large amount of electromagnetic interference is generated by high-voltage inverter equipment such as a motor controller, a generator controller and the like in the prior art, the electromagnetic interference is transmitted to other related devices through a high-voltage direct-current bus bar and a cable, the stability of a system is reduced, and meanwhile the equipment cannot meet the related national electromagnetic compatibility standard. For this purpose, the high-voltage filter includes a filter support 11, a high-voltage magnetic ring 12, an X capacitor 13, and a Y capacitor 14, wherein:
the high-voltage magnetic ring 12 is arranged inside the filter support 11.
The X capacitor 13 is mounted on the filter holder 11, and is configured to suppress differential mode interference, and provide low impedance to differential mode electromagnetic interference between the positive and negative electrodes, so that the differential mode electromagnetic interference flows back to the controller.
The Y capacitor 14 is mounted on the filter holder 11, and is used for suppressing common mode interference and providing a low impedance loop for common mode electromagnetic interference, so that the common mode electromagnetic interference flows back to the controller.
The outer layers of the high-voltage magnetic ring 12, the X capacitor 13 and the Y capacitor 14 are sealed through insulating layers. The insulating layer may be insulated and sealed by using an insulating material or an insulating film, which is not limited herein.
On the basis of not changing the original circuit design, the high-frequency electromagnetic interference on the high-voltage direct-current busbar and the cable can be greatly reduced by designing the filter bracket 11 with the high-voltage magnetic ring 12 and combining the X capacitor 13 for inhibiting differential mode interference and the Y capacitor 14 for inhibiting common mode interference; the amplitude of electromagnetic interference signals in the high-voltage busbar and the cable can be greatly reduced, and the electromagnetic compatibility of the electrical system in which the high-voltage busbar and the cable are arranged is improved.
Further, the housing 10 is formed by injection molding of plastic with a shielding function, so that the plasticity is high, and the flexibility of the high-voltage filter is greatly improved. The housing 10 is made of a shielding material and formed into any desired shape by two-shot molding. The housing 10 can prevent electromagnetic interference from affecting the efficiency of the high-voltage filter through spatial radiation, and the electromagnetic interference can be greatly reduced from entering the inside of the high-voltage filter through grounding of the housing 10.
Furthermore, the device also comprises a metal gasket 15, a positive cable connecting metal sheet 16 and a negative cable connecting metal sheet 17, wherein the positive cable connecting metal sheet 16 is used for connecting a high-voltage positive electrode, and the negative cable connecting metal sheet 17 is used for connecting a high-voltage negative electrode, wherein: the X capacitor 13 is connected with the positive cable connecting conducting strip and the negative cable connecting metal strip 17; at least two metal gaskets 15 are arranged; at least two Y capacitors 14 are provided; one of the Y capacitors 14 is connected to the positive cable connecting metal sheet 16 and one of the metal gaskets 15, preferably by soldering; the other Y capacitor 14 is connected with the negative cable connecting metal sheet 17 and the other metal gasket 15, preferably by welding.
In this embodiment, the filter holder 11 includes a first surface 111, a second surface 112, and a ring surface 113, the filter holder 11 may be in a ring structure, the first surface 111 and the second surface 112 are symmetrically disposed, as shown in fig. 3 and 4, the first surface 111 is a top surface in the drawing, the second surface 112 is a bottom surface opposite to the first surface 111, and the ring surface 113 connects the first surface 111 and the second surface 112.
The Y capacitor 14, the metal gasket 15, the positive cable connection metal piece 16, and the negative cable connection metal piece 17 are all disposed on the first surface 111, and are preferably fixed by welding or bonding.
The filter bracket 11 is provided with a mounting groove 114, in this embodiment, the projection of the mounting groove 114 is rectangular, the X capacitor 13 is disposed in the mounting groove 114, and the positive cable connection metal piece 16 and the negative cable connection metal piece 17 are respectively disposed at two sides of the X capacitor 13 along the transverse direction.
Furthermore, the second surface 112 is provided with an accommodating cavity 115, the accommodating cavity 115 is annularly arranged on the outer circumference of the mounting groove 114, and the high-voltage magnetic ring 12 is mounted in the accommodating cavity 115 and is sealed by glue filling, so that the high-voltage magnetic ring and the filter support 11 form a whole, and the electromagnetic compatibility of the electrical system in which the high-voltage magnetic ring is located is improved; as shown in fig. 4, the high-voltage magnetic ring 12 is fittingly engaged with the accommodating cavity 115 of the annular structure, and the accommodating cavity 115 is filled with the high-voltage magnetic ring 12, so that the high-voltage magnetic ring 12 and the filter support 11 form an annular whole, and the volume of the structure is reduced.
In this embodiment, two partition plates 116 are disposed in the mounting groove 114, two partition plates 116 are symmetrically disposed to divide the mounting groove 114 into three spaces, three X capacitors 13 are disposed, three X capacitors 13 are stacked in the height direction and connected between the partition plates 116 by welding, and three X capacitors 13 are connected in parallel. And two X capacitors 13 are accommodated in the mounting groove 114, one X capacitor 13 protrudes out of the mounting groove 114, the mounting bracket 18 is arranged on the second surface 112 of the filter bracket 11, and the X capacitor 13 protruding out of the mounting groove 114 is fixed on the mounting bracket 18. Such a structure is advantageous for reducing the space occupied by the X capacitor 13.
The first surface 111 of the filter holder 11 extends outwards along both sides of the horizontal direction to form a lug 19, and the two metal gaskets 15 are correspondingly mounted on the lugs 19 on both sides. The lugs 19 are used for mounting the filter bracket 11 on the electric drive controller, as shown in fig. 2, two of the metal gaskets 15 are correspondingly mounted on the lugs 19 on two sides, and when the high-voltage filter is mounted, the high-voltage cable is connected with the negative cable connecting metal sheet 17 through the positive cable connecting metal sheet 16, two of the metal gaskets 15 are transversely arranged at two ends of the filter bracket 11, and two of the Y capacitors 14 are also transversely arranged at two ends of the filter bracket 11 in the transverse direction and are fixed on the electric drive controller through mounting holes on the filter bracket 11, and the metal gaskets 15 are fixed on the mounting holes, so that connection with the ground can be provided during mounting.
Further, two Y capacitors 14 are provided, wherein one Y capacitor 14 is fixed between the positive cable connecting metal sheet 16 and one metal gasket 15 by welding, and the other Y capacitor 14 is fixed between the negative cable connecting metal sheet 17 and the other metal gasket 15 by welding. The filter support 11 is also fixedly connected with a fixed seat for installing the Y capacitor 14, so that the stability of installing the Y capacitor 14 is ensured. The positive cable connection metal sheet 16 and the negative cable connection metal sheet 17 are respectively connected with the Y capacitor 14 in a welding manner; both the X capacitor 13 and the Y capacitor 14 need to be fixed to the filter holder 11 with an adhesive after soldering to improve the vibration resistance of the capacitor.
In this embodiment, the positive cable connection metal sheet 16, the negative cable connection metal sheet 17, and the metal gasket 15 are provided with connection pins, so as to be electrically connected to the X capacitor 13 and the Y capacitor 14, and the first surface 111 of the filter support 11 is further provided with a pin protection support 20. The pin protection bracket 20 is used for protecting pins of the X capacitor 13 and/or the Y capacitor 14, the pin protection bracket 20 is a semi-enclosed structure with an opening at one side, and the pins are arranged at the opening position at one side of the pin protection bracket 20. As shown in fig. 2, the pin protection bracket 20 is in a "C" shape, and the opening of the "C" shape protects the pins near the opening.
In the above embodiment, the high-voltage cable and the high-frequency electromagnetic interference in the busbar form high impedance through the filter structure formed by the high-voltage magnetic ring 12, the X capacitor 13 and the Y capacitor 14, and the amplitude of the interference is reduced. An X capacitor 13 between the positive and negative poles of the cable provides low impedance to differential mode electromagnetic interference between the positive and negative poles, so that the differential mode electromagnetic interference flows back into the controller. The Y-capacitor 14 on the cable connector provides a low impedance return path for common mode emi, which therefore flows back into the controller. Through the cooperative work of the three main components, the amplitude of interference current flowing out of the electric drive system to an external circuit through a high-voltage cable and a busbar is greatly reduced. Meanwhile, the high-voltage filter is subjected to secondary injection molding by using plastic with a shielding function after being sealed by an insulating material, and the appearance of the shell 10 formed by secondary injection molding can be made into any shape according to external requirements, so that the flexibility of the high-voltage filter is greatly improved, and the integration and miniaturization of products are facilitated.
The construction, features and functions of the present invention are described in detail in the embodiments illustrated in the drawings, which are only preferred embodiments of the present invention, but the present invention is not limited by the drawings, and all equivalent embodiments modified or changed according to the idea of the present invention should fall within the protection scope of the present invention without departing from the spirit of the present invention covered by the description and the drawings.
Claims (10)
1. A high voltage filter, characterized by: accept in the casing, the casing forms and predetermines the shape, high voltage filter includes filter support, high-pressure magnetic ring, X electric capacity and Y electric capacity, wherein:
the high-voltage magnetic ring is arranged inside the filter bracket;
the X capacitor is arranged on the filter bracket and used for inhibiting differential mode interference;
the Y capacitor is arranged on the filter bracket and used for inhibiting common-mode interference;
the outer layers of the high-voltage magnetic ring, the X capacitor and the Y capacitor are sealed through insulating layers.
2. The high voltage filter according to claim 1, wherein: the shell is formed by plastic injection with a shielding function.
3. The high voltage filter according to claim 1, wherein: still including metal gasket, anodal cable junction sheetmetal and negative pole cable junction sheetmetal, wherein:
the X capacitor is connected with the positive cable connecting conducting strip and the negative cable connecting metal strip;
at least two metal gaskets are arranged;
the number of the Y capacitors is at least two; one of the Y capacitors is connected with the positive cable connecting metal sheet and one of the metal gaskets; and the other Y capacitor is connected with the negative cable connecting metal sheet and the other metal gasket.
4. The high voltage filter according to claim 1, wherein:
the filter support comprises a first face, a second face and an annular face, the first face and the second face are symmetrically arranged, and the annular face is connected with the first face and the second face;
the Y capacitor, the metal gasket, the anode cable connection metal sheet and the cathode cable connection metal sheet are all arranged on the first surface;
be equipped with the mounting groove on the wave filter support, the X electric capacity is located in the mounting groove, anodal cable junction sheetmetal and negative pole cable junction sheetmetal set up the both sides at the X electric capacity along horizontal respectively.
5. The high voltage filter according to claim 4, wherein: the second surface is provided with an accommodating cavity, and the high-pressure magnetic ring is installed in the accommodating cavity and sealed through glue filling.
6. The high voltage filter according to claim 1, wherein: the mounting groove is internally provided with two partition plates, the two partition plates are symmetrically arranged, the number of the X capacitors is three, the X capacitors are connected between the partition plates through welding, and the number of the X capacitors is three to form parallel connection.
7. The high voltage filter according to claim 6, wherein: and the second surface of the filter bracket is provided with a mounting bracket, and one X capacitor protrudes out of the mounting groove and is fixed on the mounting bracket.
8. The high voltage filter according to claim 1, wherein: the first face of filter support all outwards extends along the both sides of horizontal direction and forms the lug, two the metal gasket corresponding installs on the lug of both sides.
9. The high voltage filter according to claim 1, wherein: and two Y capacitors are arranged, wherein one Y capacitor is fixed between the positive cable connection metal sheet and one metal gasket through welding, and the other Y capacitor is fixed between the negative cable connection metal sheet and the other metal gasket through welding.
10. The high voltage filter according to claim 1, wherein: and the first surface of the filter support is also provided with a pin protection support.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110572996.3A CN113300588B (en) | 2021-05-25 | 2021-05-25 | High-voltage filter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110572996.3A CN113300588B (en) | 2021-05-25 | 2021-05-25 | High-voltage filter |
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| CN113300588A true CN113300588A (en) | 2021-08-24 |
| CN113300588B CN113300588B (en) | 2022-08-09 |
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| CN202110572996.3A Active CN113300588B (en) | 2021-05-25 | 2021-05-25 | High-voltage filter |
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| CN112187038A (en) * | 2020-10-26 | 2021-01-05 | 无锡中汇汽车电子科技有限公司 | Integrated EMI filter for electric vehicle motor controller |
| CN213151907U (en) * | 2020-10-26 | 2021-05-07 | 无锡中汇汽车电子科技有限公司 | Integrated EMI filter for electric vehicle motor controller |
| CN112510991A (en) * | 2020-12-15 | 2021-03-16 | 中国电子科技集团公司第四十四研究所 | EMC protection device and power supply front end filter circuit of small-size photoelectric conversion subassembly |
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