CN113872205A - Electromagnetic interference filtering device and electric automobile - Google Patents
Electromagnetic interference filtering device and electric automobile Download PDFInfo
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- CN113872205A CN113872205A CN202010530050.6A CN202010530050A CN113872205A CN 113872205 A CN113872205 A CN 113872205A CN 202010530050 A CN202010530050 A CN 202010530050A CN 113872205 A CN113872205 A CN 113872205A
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- 238000001914 filtration Methods 0.000 title claims abstract description 77
- 230000000149 penetrating effect Effects 0.000 claims abstract description 12
- 239000003990 capacitor Substances 0.000 claims description 52
- 230000007935 neutral effect Effects 0.000 claims description 21
- 229910000859 α-Fe Inorganic materials 0.000 claims description 4
- 229910001053 Nickel-zinc ferrite Inorganic materials 0.000 claims description 3
- WJZHMLNIAZSFDO-UHFFFAOYSA-N manganese zinc Chemical compound [Mn].[Zn] WJZHMLNIAZSFDO-UHFFFAOYSA-N 0.000 claims description 3
- 230000001629 suppression Effects 0.000 abstract description 9
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000008054 signal transmission Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000012790 confirmation Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005670 electromagnetic radiation Effects 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- -1 iron-silicon-aluminum Chemical compound 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 229910000702 sendust Inorganic materials 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/01—Arrangements for reducing harmonics or ripples
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
- B60L3/0023—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
- B60L53/30—Constructional details of charging stations
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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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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K9/00—Screening of apparatus or components against electric or magnetic fields
- H05K9/0007—Casings
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K9/00—Screening of apparatus or components against electric or magnetic fields
- H05K9/0064—Earth or grounding circuit
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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
-
- 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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
-
- 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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
-
- 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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/12—Electric charging stations
-
- 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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/16—Information or communication technologies improving the operation of electric vehicles
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
Abstract
The invention provides an electromagnetic interference filtering device and an electric automobile, and relates to the technical field of finished automobile control, wherein the electromagnetic interference filtering device comprises: the shielding shell is provided with openings for the alternating current wiring harness to pass through on two opposite end faces; the differential mode electromagnetic interference filtering component is arranged in the shielding shell and is close to an electromagnetic interference source; the common-mode electromagnetic interference filtering component is arranged in the shielding shell and is far away from the electromagnetic interference source; the differential mode electromagnetic interference filtering component and the common mode electromagnetic interference filtering component are respectively arranged in the alternating current wiring harness in a penetrating mode. The scheme of the invention realizes effective suppression of electromagnetic interference and ensures normal work of the vehicle and parts around the vehicle.
Description
Technical Field
The invention relates to the technical field of vehicle control, in particular to an electromagnetic interference filtering device and an electric vehicle.
Background
The alternating current slow charging line of the electric automobile comprises an alternating current line and a low voltage line, and when the electric automobile is subjected to alternating current slow charging, the slow charging line transmits alternating current and a control signal to the vehicle-mounted charger so as to charge the power battery.
The transient working characteristics of a power electronic switching device in the vehicle-mounted charger can cause larger conducted electromagnetic interference; this conduction electromagnetic interference can transmit alternating current electric wire netting along the alternating current line, influences other consumer on the electric wire netting, also can be along alternating current line coupling to control line in the charging wire to bring the influence to signal transmission, lead to on-vehicle machine of charging to normally work, influence the inside electric component work of vehicle even, and, influence the normal work of the receiver around the vehicle. Therefore, effective suppression of electromagnetic interference is a problem which is urgently needed to be solved at present.
Disclosure of Invention
The invention aims to provide an electromagnetic interference filtering device, so that the problem that electrical components in a vehicle, a vehicle-mounted charger and receivers around the vehicle cannot work normally due to electromagnetic interference in the prior art is solved.
In order to achieve the above object, the present invention provides an electromagnetic interference filtering apparatus, including:
the shielding shell is provided with openings for the alternating current wiring harness to pass through on two opposite end faces;
the differential mode electromagnetic interference filtering component is arranged in the shielding shell and is close to an electromagnetic interference source;
the common-mode electromagnetic interference filtering component is arranged in the shielding shell and is far away from the electromagnetic interference source;
the differential mode electromagnetic interference filtering component and the common mode electromagnetic interference filtering component are respectively arranged in the alternating current wiring harness in a penetrating mode.
Optionally, the differential mode electromagnetic interference filtering component includes:
the first differential mode magnetic ring is arranged in the live wire in the alternating current beam in a penetrating mode;
the second differential mode magnetic ring penetrates through a neutral line in the alternating current line bundle;
and one end of the differential mode capacitor is connected with the live wire, and the other end of the differential mode capacitor is connected with the neutral wire.
Optionally, the first differential mode magnetic ring and the second differential mode magnetic ring include: a ferro-silicon-aluminum magnetic ring.
Optionally, the common mode electromagnetic interference filtering component includes:
the common mode magnetic ring is arranged in the live wire and the neutral wire in the alternating current wiring harness in a penetrating mode;
the first capacitor and the second capacitor are arranged on one side of the common mode magnetic ring close to the differential mode electromagnetic interference filtering part;
the third capacitor and the fourth capacitor are arranged on one side of the common mode magnetic ring away from the differential mode electromagnetic interference filtering part;
the first end of the first capacitor and the first end of the third capacitor are respectively connected with a live wire in the alternating current wiring harness; the first end of the second capacitor and the first end of the fourth capacitor are respectively connected with a neutral line in the alternating current wiring harness; a second end of the first capacitor, a second end of the second capacitor, a second end of the third capacitor and a second end of the fourth capacitor are respectively connected with a ground wire in the AC line bundle;
the ground wire is connected with the shielding shell.
Optionally, the common mode magnetic ring includes: ferrite magnetic rings, manganese zinc magnetic rings or nanocrystalline magnetic rings.
Optionally, the electromagnetic interference filtering apparatus further includes:
the magnetic clamps are respectively arranged on the low-voltage wire harness to be filtered of electromagnetic interference; and the low-voltage wire harness to be filtered of electromagnetic interference is wound on each magnetic clamp for a preset number of turns.
Optionally, the magnetic clip comprises a nickel zinc ferrite magnetic clip.
An embodiment of the present invention further provides an electric vehicle, including: the vehicle-mounted charger and the slow charging seat further comprise the electromagnetic interference filtering device;
and an alternating current wiring harness between the vehicle-mounted charger and the slow charging seat penetrates through the electromagnetic interference filtering device.
Optionally, the electromagnetic interference filtering apparatus further includes: and the plurality of magnetic clamps are arranged on the low-voltage wire harness between the vehicle-mounted charger and the slow charging seat.
Optionally, a fixed mounting structure is arranged on the shielding shell, and the shielding shell is connected with the body of the electric automobile through the fixed mounting structure.
The technical scheme of the invention at least has the following beneficial effects:
according to the electromagnetic interference filtering device provided by the embodiment of the invention, the shielding shell is arranged, so that the electromagnetic interference is shielded, and meanwhile, the electromagnetic interference filtering device is conveniently connected with the external equipment in a grounding manner; the differential mode electromagnetic interference filtering component is arranged in the shielding shell to suppress differential mode electromagnetic interference, and the common mode electromagnetic interference filtering component is arranged in the shielding shell to suppress common mode interference, so that the conduction of electromagnetic interference along an alternating current wire harness is suppressed to a certain extent, and the normal work of surrounding equipment and electric parts in the electric automobile is facilitated.
Drawings
FIG. 1 is a schematic diagram of an EMI filtering apparatus according to an embodiment of the present invention;
fig. 2 is a schematic view of an electromagnetic interference filtering apparatus according to an embodiment of the present invention installed in an electric vehicle.
Description of reference numerals:
1-shielding shell, 2-differential mode electromagnetic interference filtering component, 21-first differential mode magnetic ring, 22-second differential mode magnetic ring, C1-differential mode capacitor, 3-common mode electromagnetic interference filtering component, 31-common mode magnetic ring, Y1-first capacitor, Y2-second capacitor, Y3-third capacitor, Y4-fourth capacitor, 41-live wire, 42-neutral wire, 43-ground wire, 44-low voltage wire harness, 5-vehicle charger, 6-slow charging seat, 7-connector, 8-magnetic ring, 9A-left front wheel, 9B-right front wheel, 9C-left rear wheel, 9D-right rear wheel, 10-electromagnetic interference filtering device and 11-fixed mounting structure.
Detailed Description
In order to make the technical problems, technical solutions and advantages of the present invention more apparent, the following detailed description is given with reference to the accompanying drawings and specific embodiments.
The invention provides an electromagnetic interference filtering device and an electric automobile, aiming at the problem that peripheral components can not work normally due to the fact that electromagnetic interference is conducted along an alternating current wire harness in the prior art, so that the electromagnetic interference is effectively inhibited, the electromagnetic interference is prevented from being conducted along the alternating current wire harness, and the components around an electromagnetic interference source can work normally.
As shown in fig. 1, an embodiment of the present invention provides an electromagnetic interference filtering apparatus, including:
the shielding device comprises a shielding shell 1, wherein two opposite end faces of the shielding shell 1 are respectively provided with an opening for an alternating current wiring harness to pass through; the ac harness is connected between the electromagnetic interference source and other components cooperating with the electromagnetic interference source, that is, the ac harness can conduct the electromagnetic interference generated by the electromagnetic interference source to the surroundings, namely: the alternating current wiring harness is an alternating current wiring harness to be filtered of electromagnetic interference.
The differential mode electromagnetic interference filtering component 2 is arranged in the shielding shell 1 and is close to an electromagnetic interference source; the differential mode electromagnetic interference filtering component 2 is used for effectively inhibiting the differential mode electromagnetic interference generated by an electromagnetic interference source.
A common mode electromagnetic interference filtering component 3 which is arranged in the shielding shell 1 and is far away from the electromagnetic interference source; the common-mode electromagnetic interference suppression method is used for effectively suppressing the common-mode electromagnetic interference generated by the electromagnetic interference source.
Wherein, the differential mode electromagnetic interference filtering part 2 and the common mode electromagnetic interference filtering part 3 are respectively arranged in the alternating current wire harness in a penetrating way.
In the electromagnetic interference filtering device of the embodiment of the invention, the shielding shell 1 plays a role in shielding electromagnetic radiation, the differential mode electromagnetic interference filtering part 2 and the common mode electromagnetic interference filtering part 3 respectively realize effective inhibition on differential mode electromagnetic interference and common mode electromagnetic interference conducted by the alternating current wiring harness, the intensity of the electromagnetic interference conducted by the alternating current wiring harness is reduced, and the working environment of electrical components around the alternating current wiring harness is provided.
As an alternative embodiment, as shown in fig. 1, the differential mode electromagnetic interference filtering part 2 includes:
the first differential mode magnetic ring 21 is arranged in the live wire 41 in the alternating current beam in a penetrating mode; for suppressing electromagnetic interference conducted along the live line 41.
The second differential mode magnetic ring 22 is arranged on a neutral line 42 in the alternating current beam in a penetrating mode; for suppressing electromagnetic interference conducted along the neutral line 42, the neutral line 42 is colloquially referred to as a neutral line.
And a differential mode capacitor C1 having one end connected to the live line 41 and the other end connected to the neutral line 42. For suppressing differential mode electromagnetic interference. Since differential mode electromagnetic interference exists between the live line 41 and the neutral line 42, the differential mode capacitor C1 of the embodiment of the present application is connected between the live line 41 and the neutral line 42.
Specifically, the first differential mode magnetic ring 21 and the second differential mode magnetic ring 22 include sendust magnetic rings. Compared with ferrite magnetic rings and the like, the iron-silicon-aluminum magnetic ring can effectively inhibit differential mode electromagnetic interference.
It should be noted that, because the diameters of the live wire 41 and the neutral wire 42 are larger, in this embodiment, the live wire 41 passes through the first differential mode magnetic ring 21 and is not wound on the first differential mode magnetic ring 21, and the neutral wire 42 passes through the second differential mode magnetic ring 22 and is not wound on the second differential mode magnetic ring 22, therefore, in order to improve the electromagnetic interference suppression effect of the first differential mode magnetic ring 21 and the second differential mode magnetic ring 22, the sizes of the first differential mode magnetic ring 21 and the second differential mode magnetic ring 22 in this embodiment are as follows: the width, the thickness and the like can be flexibly determined according to test data.
As an alternative embodiment, the common mode electromagnetic interference filtering section 3 includes:
the common mode magnetic ring 31 is arranged in a live wire 41 and a neutral wire 42 in the alternating current bunch in a penetrating mode; suppression of electromagnetic interference conducted by the hot wire 41 and/or the neutral wire 42 is achieved.
The first capacitor Y1 and the second capacitor Y2 are arranged on one side of the common mode magnetic ring 31 close to the differential mode electromagnetic interference filtering component 2;
and the third capacitor Y3 and the fourth capacitor Y4 are arranged on one side of the common mode magnetic ring 31 far away from the differential mode electromagnetic interference filtering part 2.
Wherein a first terminal of the first capacitor Y1 and a first terminal of the third capacitor Y3 are respectively connected to the live lines 41 in the AC line bundle; a first terminal of the second capacitor Y2 and a first terminal of the fourth capacitor Y4 are respectively connected with the neutral line 42 in the ac line bundle; the second terminal of the first capacitor Y1, the second terminal of the second capacitor Y2, the second terminal of the third capacitor Y3 and the second terminal of the fourth capacitor Y4 are respectively connected to the ground line 43 in the AC beam; the filtering function of high-voltage common mode interference is realized.
The ground wire 43 is connected to the shield case 1.
In this embodiment, the common mode electromagnetic interference filtering component is formed as a pi-type filter circuit by disposing the Y capacitor formed by the first capacitor Y1 and the second capacitor Y2, and the Y capacitor formed by the third capacitor Y3 and the fourth capacitor Y4 on two sides of the common mode magnetic ring 31. Effective suppression of common mode interference conducted by the alternating current wiring harness is achieved. By connecting the ground wire 43 with the shielding case 1, the uniform connection of the ground wires in the electromagnetic interference filtering device is realized, which facilitates the grounding connection of the electromagnetic interference filtering device and the external device.
Specifically, the common mode magnetic ring 31 includes: ferrite magnetic rings, manganese zinc magnetic rings or nanocrystalline magnetic rings.
Further, as shown in fig. 1, as an alternative embodiment, the electromagnetic interference filtering apparatus further includes:
the magnetic clamps 8 are respectively arranged on the low-voltage wire harness 44 to be filtered of electromagnetic interference; the low voltage wire harness 44 to be filtered of electromagnetic interference is wound on each magnetic clamp 8 a preset number of turns. Specifically, the magnetic clip 8 comprises a nickel zinc ferrite magnetic clip.
In the present embodiment, the inductance of the magnetic clamp 8 is increased by winding the low voltage wire harness 44 on the magnetic clamp 8 for a predetermined number of turns, and the electromagnetic interference suppression strength of the magnetic clamp 8 is improved. Specifically, because the magnetic clamp has a smaller weight, the magnetic clamp 8 is fixedly installed along with the low-voltage wire harness 44 without considering an additional fixing buckle, and the installation structure is simplified. In addition, in this embodiment, the plurality of magnetic clips 8 are uniformly arranged in the length direction of the low-voltage wire harness 44, which is beneficial to reducing the electromagnetic interference intensity, improving the transmission quality of signals, and ensuring the reliable and safe operation of the whole charging driving system.
According to the embodiment of the invention, the alternating-current wiring harness passes through the shielding shell 1, the differential mode electromagnetic interference filtering part 2 and the common mode electromagnetic interference filtering part 3, so that the electromagnetic interference conducted by the alternating-current wiring harness is effectively inhibited, and the radiation emission intensity along the alternating-current wiring harness is reduced; through set up a plurality of magnetic clamps 8 on low pressure pencil 44, realized having played the effect of reinforcing to electromagnetic interference protection to the effective suppression of low pressure pencil 44 to electromagnetic interference's conduction.
An embodiment of the present invention further provides an electric vehicle, including: the vehicle-mounted charger 5 and the slow charging seat 6 further comprise the electromagnetic interference filtering device 10;
wherein, the alternating current pencil between the vehicle-mounted charger 5 and the slow charging seat 6 passes through the electromagnetic interference filtering device 10.
Specifically, as shown in fig. 2, the electric vehicle includes: a left front wheel 9A, a right front wheel 9B, a left rear wheel 9C, and a right rear wheel 9D; the slow charging seat 1 is positioned on a vehicle body near the upper part of the right rear wheel 9D of the electric vehicle, the vehicle-mounted charger 5 is positioned in a front engine room in front of the electric vehicle, the vehicle-mounted charging motor 5 is connected with a slow charging harness through a connector 7 and the slow charging seat 6, and the slow charging harness comprises an alternating current harness consisting of a live wire 41, a neutral wire 42 and a ground wire 43 and a low-voltage harness 44 consisting of a connection confirmation signal wire and a charging connection control signal wire. Wherein, all fill line books slowly and bind together, that is: the alternating current wire harness and the low-voltage wire harness 44 have the strong electric wires and the low-voltage control wires bundled together, and from the electromagnetic compatibility analysis, the design has the crosstalk between the wires with different voltage levels, and the problem that the high-voltage wire interferes with the low-voltage wire exists, so that the electromagnetic interference of the slow charging wire harness needs to be suppressed. Therefore, in the electric vehicle according to the embodiment of the present invention, the electromagnetic interference filtering device 10 is preferably disposed between the vehicle-mounted charger 5 and the slow charging base 6, so as to effectively suppress electromagnetic interference conducted by the wiring harness, avoid that the electromagnetic interference is transmitted to the ac power grid along the wiring harness to affect other electric devices on the power grid during ac charging, and the electromagnetic interference is coupled to the voltage wiring harness along the ac wiring harness to affect control and signal transmission, so that the vehicle-mounted charger 5 cannot normally operate.
Further, the electromagnetic interference filtering apparatus 10 further includes: and the magnetic clamps 8 are arranged on the low-voltage wiring harness 44 between the vehicle-mounted charger 5 and the slow charging seat 6. The magnetic clamp 8 is used for realizing effective suppression of electromagnetic interference conducted by the low-voltage wire harness.
Further, a fixed mounting structure 11 is arranged on the shielding shell 1, and the shielding shell 1 is connected with the body of the electric automobile through the fixed mounting structure 11. The electromagnetic interference filtering device 10 is connected with the vehicle body through the fixed mounting structure 11, and the electromagnetic interference filtering device 10 is connected with the vehicle body in a grounding mode.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (10)
1. An electromagnetic interference filtering apparatus, comprising:
the shielding device comprises a shielding shell (1), wherein two opposite end faces of the shielding shell (1) are respectively provided with an opening for an alternating current wiring harness to pass through;
the differential mode electromagnetic interference filtering component (2) is arranged in the shielding shell (1) and is close to an electromagnetic interference source;
the common-mode electromagnetic interference filtering component (3) is arranged in the shielding shell (1) and is far away from the electromagnetic interference source;
the differential mode electromagnetic interference filtering component (2) and the common mode electromagnetic interference filtering component (3) are respectively arranged in the alternating current wiring harness in a penetrating mode.
2. The emi filtering apparatus according to claim 1, wherein the differential mode emi filtering part (2) comprises:
the first differential mode magnetic ring (21) is arranged in a live wire (41) in the alternating current beam in a penetrating mode;
the second differential mode magnetic ring (22) is arranged on a neutral line (42) in the alternating current beam in a penetrating mode;
and a differential mode capacitor (C1) having one end connected to the live line (41) and the other end connected to the neutral line (42).
3. The emi filtering apparatus as set forth in claim 2, wherein said first differential mode magnetic ring (21) and said second differential mode magnetic ring (22) include: a ferro-silicon-aluminum magnetic ring.
4. The emi filtering apparatus according to claim 1, wherein the common mode emi filtering means (3) comprises:
the common mode magnetic ring (31) is arranged in a live wire (41) and a neutral wire (42) in the alternating current wiring harness in a penetrating mode;
the first capacitor (Y1) and the second capacitor (Y2) are arranged on one side, close to the differential mode electromagnetic interference filtering component (2), of the common mode magnetic ring (31);
the third capacitor (Y3) and the fourth capacitor (Y4) are arranged on one side, away from the differential mode electromagnetic interference filtering component (2), of the common mode magnetic ring (31);
wherein a first terminal of the first capacitor (Y1) and a first terminal of the third capacitor (Y3) are respectively connected with a live line (41) in the AC beam; a first terminal of the second capacitor (Y2) and a first terminal of the fourth capacitor (Y4) are respectively connected with a neutral line (42) in the AC line bundle; a second terminal of the first capacitor (Y1), a second terminal of the second capacitor (Y2), a second terminal of the third capacitor (Y3), and a second terminal of the fourth capacitor (Y4) are connected to a ground line (43) in the AC harness, respectively;
the ground wire (43) is connected to the shield case (1).
5. The EMI filtering device as set forth in claim 4, wherein said common mode magnetic ring (31) includes: ferrite magnetic rings, manganese zinc magnetic rings or nanocrystalline magnetic rings.
6. The EMI filtering device as set forth in any one of claims 1 to 5, further comprising:
the magnetic clamps (8), the magnetic clamps (8) are respectively arranged on the low-voltage wire harness (44) to be filtered of electromagnetic interference; and the low-voltage wire harness (44) to be filtered of the electromagnetic interference is wound on each magnetic clamp (8) for a preset number of turns.
7. The EMI filtering device as set forth in claim 6, wherein said magnetic clip (8) comprises a nickel-zinc-ferrite magnetic clip.
8. An electric vehicle comprising: a vehicle-mounted charger (5) and a slow charging base (6), characterized by further comprising an electromagnetic interference filtering device according to any one of claims 1 to 7;
and an alternating current wiring harness between the vehicle-mounted charger (5) and the slow charging seat (6) penetrates through the electromagnetic interference filtering device.
9. The electric vehicle of claim 8, wherein the electromagnetic interference filtering device further comprises: and the magnetic clamps (8) are arranged on a low-voltage wire harness (44) between the vehicle-mounted charger (5) and the slow charging seat (6).
10. The electric automobile according to claim 8, characterized in that the shielding shell (1) is provided with a fixed mounting structure (11), and the shielding shell (1) is connected with the body of the electric automobile through the fixed mounting structure (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010530050.6A CN113872205A (en) | 2020-06-11 | 2020-06-11 | Electromagnetic interference filtering device and electric automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010530050.6A CN113872205A (en) | 2020-06-11 | 2020-06-11 | Electromagnetic interference filtering device and electric automobile |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113872205A true CN113872205A (en) | 2021-12-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010530050.6A Pending CN113872205A (en) | 2020-06-11 | 2020-06-11 | Electromagnetic interference filtering device and electric automobile |
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| CN (1) | CN113872205A (en) |
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| CN202309512U (en) * | 2011-10-25 | 2012-07-04 | 科比传动技术（上海）有限公司 | Electromagnetic interference restraining structure of frequency converter |
| CN203734632U (en) * | 2013-12-10 | 2014-07-23 | 国家电网公司 | Electromagnetic interference filter suitable for high voltage Hall voltage sensor |
| CN106067725A (en) * | 2016-07-21 | 2016-11-02 | 江西泰豪军工集团有限公司 | A kind of power-supply filter suppressing short wave communication frequency band speech to disturb |
| CN108001276A (en) * | 2017-12-12 | 2018-05-08 | 北京新能源汽车股份有限公司 | Electric automobile |
| CN208369294U (en) * | 2018-07-19 | 2019-01-11 | 北京新能源汽车股份有限公司 | Circuit for suppressing conductive interference, slow charging box and automobile |
| CN209233717U (en) * | 2019-01-16 | 2019-08-09 | 珠海美光原科技股份有限公司 | A kind of EMC filter circuit |
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202309512U (en) * | 2011-10-25 | 2012-07-04 | 科比传动技术（上海）有限公司 | Electromagnetic interference restraining structure of frequency converter |
| CN203734632U (en) * | 2013-12-10 | 2014-07-23 | 国家电网公司 | Electromagnetic interference filter suitable for high voltage Hall voltage sensor |
| CN106067725A (en) * | 2016-07-21 | 2016-11-02 | 江西泰豪军工集团有限公司 | A kind of power-supply filter suppressing short wave communication frequency band speech to disturb |
| CN108001276A (en) * | 2017-12-12 | 2018-05-08 | 北京新能源汽车股份有限公司 | Electric automobile |
| CN208369294U (en) * | 2018-07-19 | 2019-01-11 | 北京新能源汽车股份有限公司 | Circuit for suppressing conductive interference, slow charging box and automobile |
| CN209233717U (en) * | 2019-01-16 | 2019-08-09 | 珠海美光原科技股份有限公司 | A kind of EMC filter circuit |
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