CN212159973U - CEVT automotive electronics high voltage component EMC testing arrangement - Google Patents
CEVT automotive electronics high voltage component EMC testing arrangement Download PDFInfo
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- CN212159973U CN212159973U CN202020735367.9U CN202020735367U CN212159973U CN 212159973 U CN212159973 U CN 212159973U CN 202020735367 U CN202020735367 U CN 202020735367U CN 212159973 U CN212159973 U CN 212159973U
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Abstract
The utility model discloses a CEVT automotive electronics high voltage component EMC testing arrangement, including high-pressure artificial network, low pressure artificial network, the pulse amplification module, high voltage power supply filter module and low voltage power supply filter module, low pressure artificial network connects low voltage power supply filter module, high voltage power supply filter module and pulse amplification module are connected respectively to high pressure artificial network, low pressure artificial network and the sample that awaits measuring set up respectively inside the anechoic chamber, the pulse amplification module, high pressure filter module and low pressure filter module set up respectively outside the anechoic chamber, the sample that awaits measuring connects low pressure artificial network and high pressure artificial network respectively the electricity. The utility model does not need to reform the anechoic chamber structure or specially create anechoic chamber and shielding chamber, thus saving great cost economically; the test layout is concise; test signal link reduction; the injection signal, the test monitoring and the measurement analysis are in the same place, the test efficiency is improved, and the test cost is reduced.
Description
Technical Field
The utility model relates to a high-voltage component tests technical field, especially relates to a CEVT automotive electronics high-voltage component EMC testing arrangement.
Background
CEVT, the China Euro Vehicle Technology, "in Specific EMC requirements for shielded components in the HV System", the EMC test requirements and the test method of the shielding parts of the high-voltage system of the new energy automobile are stipulated, EMC testing, which can be interpreted as electromagnetic compatibility testing, requires the use of a special anechoic chamber and a shielding chamber associated therewith, injecting special pulse waveform into the power input end of the high-voltage component in the shielding chamber, synchronously performing electromagnetic interference emission test of the high-voltage component in the anechoic chamber, and the requirement for the test site is high, and the existing general anechoic chamber needs to be modified, but if the surrounding space of the existing anechoic chamber is limited, it cannot be modified, and it is necessary to specially construct a anechoic chamber and a shielding chamber having a special structure to meet the requirements, thereby requiring a great expense. Moreover, it is inconvenient in the aspects of test sample layout, test signal acquisition, test process monitoring, etc.
SUMMERY OF THE UTILITY MODEL
The utility model discloses to the shortcoming among the prior art, provide a CEVT automotive electronics high voltage component EMC testing arrangement.
In order to solve the technical problem, the utility model discloses a following technical scheme can solve:
the utility model provides a CEVT automotive electronics high voltage component EMC testing arrangement for carry out the EMC test to the sample that awaits measuring, including high-pressure artificial network, low pressure artificial network, pulse amplification module, high voltage power supply filter module and low pressure power supply filter module, low pressure artificial network connects low pressure power supply filter module, high pressure artificial network connects respectively high voltage power supply filter module with pulse amplification module, high pressure artificial network, low pressure artificial network and the sample that awaits measuring set up respectively inside the anechoic chamber, and pulse amplification module, high voltage filter module and low pressure filter module set up respectively outside the anechoic chamber, the sample that awaits measuring is connected respectively the low pressure artificial network and high voltage artificial network.
As an implementation mode, the pulse amplification module includes a pulse generator and a power amplifier connected to the pulse generator, a signal interface board is disposed on a wall of the anechoic chamber, and the power amplifier and the high-voltage artificial network are respectively connected to the signal interface board.
As an implementation manner, the high-voltage artificial network comprises a high-voltage power supply interface, an artificial network unit, a shielding shell, an output port, a plurality of pulse signal injection ports and auxiliary ports corresponding to the pulse signal injection ports, wherein the high-voltage power supply interface, the output port, the pulse signal injection ports and the auxiliary ports are arranged on the shielding shell, and the pulse signal injection ports and the auxiliary ports are connected with each other;
and the signal output by the power amplifier is fed back to the auxiliary port through the signal interface board.
As an implementation mode, a pulse signal injection device is arranged in the shielding shell;
the pulse signal injection device comprises a high-voltage power line and an injection probe for clamping the high-voltage power line, the high-voltage power line is connected with the artificial network unit, and the pulse signal injection port is electrically connected with the input end of the injection probe.
As an implementation mode, the low-voltage power supply filtering module includes a low-voltage power supply and a low-voltage filter, and the low-voltage power supply is connected to the low-voltage filter and the low-voltage artificial network in sequence.
As an implementation mode, the high-voltage power supply filtering module comprises a high-voltage power supply and a high-voltage filter, and the high-voltage power supply is sequentially connected with the high-voltage filter and the artificial network unit.
As an implementation mode, the inner wall of the anechoic chamber is provided with a wave-absorbing material layer.
As an implementable mode, the sample to be tested comprises a sample body to be tested and a load box, the sample body to be tested is connected with an output port of a high-voltage artificial network through a shielding high-voltage direct-current cable, the sample body to be tested is connected with an output port of a low-voltage artificial network through a low-voltage power line, and the load box is connected with the sample body to be tested through a low-voltage signal line.
As an implementation mode, the electromagnetic wave testing device further comprises a signal receiving antenna, wherein the signal receiving antenna is arranged in the anechoic chamber and is used for receiving electromagnetic interference signals generated by the sample to be tested.
The utility model discloses owing to adopted above technical scheme, have apparent technological effect:
the structure of the utility model is adopted to carry out EMC test on the automobile electronic high-voltage component, the anechoic chamber structure transformation or the new anechoic chamber and the shielding chamber are not needed, but the existing laboratory resources are utilized, thereby saving great cost economically; the test layout is simple, and hardware and test site space resources are saved; the test signal link is reduced, the path is shortened, and the uncertainty of the test is reduced; the injection signal, the test monitoring and the measurement analysis are in the same place, the test efficiency is improved, and the test cost is reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.
Fig. 1 is a schematic view of the overall structure of the present invention;
fig. 2 is a schematic structural diagram of a high-voltage artificial network.
Detailed Description
The present invention will be described in further detail with reference to the following examples, which are illustrative of the present invention and are not intended to limit the present invention.
Example 1:
in the prior art, when an EMC test of an automotive electronic high-voltage component is executed, a special anechoic chamber and a matched shielding chamber are needed, a special pulse waveform is injected into a power supply input end of the high-voltage component in the shielding chamber, an electromagnetic interference emission test of the high-voltage component is synchronously carried out in the anechoic chamber, the requirement on a test site is high, the existing general anechoic chamber needs to be modified, but if the surrounding space of the existing anechoic chamber is limited, the existing anechoic chamber cannot be modified, and at the moment, an anechoic chamber and a shielding chamber which meet the requirement and have special structures need to be specially constructed, so that great expense is needed. Moreover, it is inconvenient in the aspects of test sample layout, test signal acquisition, test process monitoring, etc. How can utilize the current resource in laboratory and carry out EMC test to automotive electronics high voltage component on the basis of not reforming transform laboratory structure to can make the test result can reach the result that prior art reached or be higher than prior art test result, convenient and fast, accurate effective moreover.
Therefore, the utility model provides a CEVT automotive electronics high voltage unit EMC testing arrangement, as shown in FIG. 1 for carry out the EMC test to the sample that awaits measuring, including high-pressure artificial network 10, low pressure artificial network 11, pulse amplification module, high voltage power supply filter module and low voltage power supply filter module, low pressure artificial network 11 connects low voltage power supply filter module, high pressure artificial network 10 connects respectively high voltage power supply filter module with pulse amplification module, high pressure artificial network 10, low pressure artificial network 11 and the sample that awaits measuring set up respectively inside anechoic chamber 1, and pulse amplification module, high voltage filter module and low voltage filter module set up respectively in anechoic chamber 1 outsidely, the sample that awaits measuring is connected respectively electricity low pressure artificial network 11 and high voltage artificial network 10. By adopting the structure of the utility model to carry out EMC test on the automobile electronic high-voltage component, the structure of the anechoic chamber 1 is not required to be modified or the anechoic chamber and the shielding chamber are specially newly built, but the existing laboratory resources are utilized, thereby saving great cost economically; the test layout is simple, and hardware and test site space resources are saved; the test signal link is reduced, the path is shortened, and the uncertainty of the test is reduced; the injection signal, the test monitoring and the measurement analysis are in the same place, the test efficiency is improved, and the test cost is reduced.
The pulse amplification module comprises a pulse generator 2 and a power amplifier 3 connected with the pulse generator 2, a pulse waveform meeting the requirements of the CEVT standard is generated by the pulse generator 2, and a signal is amplified to an amplitude meeting the requirements of the standard through the power amplifier 3, in one embodiment, in order to not change the structure of the wall of the anechoic chamber 1, a signal interface board 4 is arranged on the wall of the anechoic chamber 1, the power amplifier 3 and the high-voltage artificial network 10 are respectively connected with the signal interface board 4, more specifically, the signal output by the power amplifier 3 is connected to the signal interface board 4 of the anechoic chamber 1 through an N-type coaxial cable, and then the pulse signal is fed into the anechoic chamber 1 through the signal interface board 4 to be connected with the high-voltage artificial network 10, in this embodiment, the models of the pulse generator 2 and the power amplifier 3 are not limited, as long as the same function can be achieved.
In other embodiments, as shown in fig. 2, the high voltage artificial network 10 includes an artificial network unit 102, a shielding casing 101, an output port (outside the shielding casing, which is not labeled in the drawing), a plurality of pulse signal injection ports 103, and an auxiliary port (outside the shielding casing, which is not labeled in the drawing) corresponding to the pulse signal injection ports, where the output port, the pulse signal injection ports 103, and the auxiliary port are disposed on the shielding casing 101, more specifically, outside the shielding casing 101, the pulse signal injection ports 103 and the auxiliary port are connected to each other, a signal output by the power amplifier 2 is fed back to the auxiliary port through the signal interface board 4, in the present embodiment, the commonly used auxiliary port is an RF auxiliary port, and the pulse signal fed into the anechoic chamber 1 is connected to the RF auxiliary port of the high voltage artificial network 10 by an N-type coaxial cable.
In addition, a pulse signal injection device is arranged in the shielding shell 101, the pulse signal injection device can be pre-installed inside the shielding shell 101, or can be installed inside the shielding shell 101 when in use, the pulse signal injection device comprises a high-voltage power line 104 and an injection probe 9 for clamping the high-voltage power line 104, the high-voltage power line 104 is connected with the artificial network unit 102, and the pulse signal injection port 103 is electrically connected with an input end of the injection probe 9. Specifically, the RF auxiliary port of the high-voltage artificial network 10 is connected to the input end of the injection probe 9, the injection probe 9 is in a pincerlike structure and is annular, and is placed inside the high-voltage artificial network 10, the high-voltage power line 104 without a shielding layer is placed in the middle of the injection probe 9, the shielding shell 101 of the high-voltage artificial network 10 is tightly closed, and good contact with the grounding plate 18 of the test table is ensured, the grounding plate 18 of the test table can be a copper plate, and the copper plate is placed on a wooden test table, thereby realizing injection of pulse signals to the high-voltage power line 104 of the sample to be tested in the shielding shell 101 of the high-voltage artificial network 10. The high-voltage artificial network 10 is used for providing stable impedance and isolating high-frequency interference signals between a high-voltage power supply and a product to be tested, and a power supply positive electrode network and a power supply negative electrode network in the high-voltage artificial network 10 are independent but are arranged in a shielding shell 101.
In the present embodiment, the low voltage artificial network 11 is used to provide stable impedance and isolate high frequency interference signals between the low voltage power supply and the sample to be measured, and the power supply positive electrode network and the power supply negative electrode network in the low voltage artificial network 11 are independent and do not have a common shielding shell.
The low-voltage power supply filtering module comprises a low-voltage power supply 7 and a low-voltage filter 8, wherein the low-voltage power supply 7 is sequentially connected with the low-voltage filter 8 and a low-voltage artificial network 11; the high-voltage power supply filtering module comprises a high-voltage power supply 5 and a high-voltage filter 6, the high-voltage power supply 5 is sequentially connected with the high-voltage filter 6 and the artificial network unit 102, corresponding electromagnetic interference can be prevented through the low-voltage power supply filtering module and the high-voltage power supply filtering module, certainly, the low-voltage power supply filtering module and the high-voltage power supply filtering module are not limited to the two forms, and other structures capable of achieving the same function are possible, and are not repeated here.
In another embodiment, the wave-absorbing material layer 14 is disposed on the inner wall of the anechoic chamber 1, and the wave-absorbing material layer 14 can absorb or greatly reduce the electromagnetic wave energy received by the surface thereof, so as to reduce the reflection of the electromagnetic wave in the anechoic chamber cavity.
Generally, in order to facilitate the detection, the sample to be detected is equivalent to two structures, namely a sample body 13 to be detected and a load box 15, in order to facilitate the connection, the sample body 13 to be detected is connected with an output port of the high-voltage artificial network 10 through a shielded high-voltage direct-current cable 12 (more precisely, the output port is a cable output port and is also arranged outside the shielding shell 101), the cable output port is also one of the output ports of the high-voltage artificial network, the output ports of the high-voltage artificial network are many and different in function, the sample body 13 to be detected is connected with the output port of the low-voltage artificial network 11 through a low-voltage power line 17, and the load box 15 is connected with the sample body 13 to be detected through a low-voltage signal line 16, so that the simplified connection of the sample to be detected, the high.
Whole device is when testing, with high-pressure artificial network 10, low pressure artificial network 11 and the sample setting that awaits measuring on test table ground plate 18, test table ground plate 18 places on wooden test table, in addition, still including the signal reception antenna 19 that is used for receiving electromagnetic interference signal, signal reception antenna 19 sets up in anechoic chamber 1 to aim at low voltage power cord length direction's central point and put (and/or the sample body that awaits measuring), the distance is 1 meter, and signal reception antenna 19 is used for receiving the electromagnetic interference signal that the sample that awaits measuring produced. The low-voltage power supply and the high-voltage power supply respectively provide low-voltage power supply and high-voltage power supply for the sample to be detected, and the sample to be detected is debugged to be in a normal working state; starting the pulse generator 2 and the power amplifier 3, outputting a pulse waveform, and injecting a pulse signal onto the high-voltage power line 104 through the injection probe 9; the signal receiving antenna 19 measures the electromagnetic interference signal generated by the sample to be tested in the current state, the electromagnetic interference signal received by the signal receiving antenna 19 is analyzed by the receiver and judged according to the standard requirement, and the subsequent analysis is judged to be realized by other software, which is not described herein again.
In the above embodiments, the existing laboratory resources are utilized without modifying the anechoic chamber structure or specially building anechoic chambers and shielding chambers, thereby saving great cost economically; the test layout is simple, hardware and space resources of a test field are saved, test signal links are reduced, paths are shortened, and the uncertainty of the test is reduced; the injection signal, the test monitoring and the measurement analysis are in the same place, the test efficiency is improved, and the test cost is reduced.
In addition, it should be noted that the specific embodiments described in the present specification may differ in the shape of the components, the names of the components, and the like. All equivalent or simple changes made according to the structure, characteristics and principle of the utility model are included in the protection scope of the utility model. Various modifications, additions and substitutions may be made by those skilled in the art without departing from the scope of the invention as defined in the accompanying claims.
Claims (9)
1. The utility model provides a CEVT automotive electronics high voltage component EMC testing arrangement for carry out the EMC test to the sample that awaits measuring, including high-pressure artificial network, low pressure artificial network, pulse amplification module, high voltage power supply filter module and low pressure power supply filter module, low pressure artificial network connects low pressure power supply filter module, high pressure artificial network connects respectively high voltage power supply filter module with pulse amplification module, its characterized in that, high pressure artificial network, low pressure artificial network and the sample that awaits measuring set up respectively inside the anechoic chamber, and pulse amplification module, high voltage filter module and low pressure filter module set up respectively outside the anechoic chamber, the sample that awaits measuring is connected respectively low pressure artificial network and high pressure artificial network.
2. A CEVT automotive electronic high-voltage component EMC testing device as claimed in claim 1, wherein the pulse amplification module comprises a pulse generator and a power amplifier connected with the pulse generator, the wall of the anechoic chamber is provided with a signal interface board, and the power amplifier and the high-voltage artificial network are respectively connected with the signal interface board.
3. A CEVT automotive electronics high voltage component EMC test device according to claim 2, wherein the high voltage artificial network comprises a high voltage power interface, an artificial network unit, a shielding shell, an output port, several pulse signal injection ports and auxiliary ports corresponding to the pulse signal injection ports, the high voltage power interface, the output port, the pulse signal injection ports and the auxiliary ports are arranged on the shielding shell, the pulse signal injection ports and the auxiliary ports are connected to each other;
and the signal output by the power amplifier is fed back to the auxiliary port through the signal interface board.
4. A CEVT automotive electronics high voltage component EMC testing device as claimed in claim 3, wherein a pulse signal injection device is provided within the shielded enclosure;
the pulse signal injection device comprises a high-voltage power line and an injection probe for clamping the high-voltage power line, the high-voltage power line is connected with the artificial network unit, and the pulse signal injection port is electrically connected with the input end of the injection probe.
5. A CEVT automotive electronics high voltage component EMC testing device as claimed in claim 1, wherein the low voltage power supply filtering module comprises a low voltage power supply and a low voltage filter, the low voltage power supply being connected in turn to the low voltage filter and a low voltage artificial network.
6. A CEVT automotive electronics high voltage component EMC testing device as claimed in claim 4, wherein the high voltage power supply filtering module comprises a high voltage power supply and a high voltage filter, the high voltage power supply is connected with the high voltage filter and the artificial network unit in sequence.
7. A CEVT automotive electronics high voltage part EMC testing device as claimed in claim 1, wherein the inner wall of the anechoic chamber is provided with a layer of wave absorbing material.
8. The CEVT automotive electronics high voltage component EMC testing device of claim 1, wherein the sample to be tested comprises a sample body to be tested and a load box, the sample body to be tested is connected with the output port of the high voltage artificial network through a shielded high voltage direct current cable, the sample body to be tested is connected with the output port of the low voltage artificial network through a low voltage power line, and the load box is connected with the sample body to be tested through a low voltage signal line.
9. A CEVT vehicle electronic high-voltage component EMC testing device according to any one of claims 1-8, further comprising a signal receiving antenna, wherein the signal receiving antenna is arranged in the anechoic chamber and is used for receiving electromagnetic interference signals generated by a sample to be tested.
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| CN202020735367.9U CN212159973U (en) | 2020-05-07 | 2020-05-07 | CEVT automotive electronics high voltage component EMC testing arrangement |
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| CN202020735367.9U CN212159973U (en) | 2020-05-07 | 2020-05-07 | CEVT automotive electronics high voltage component EMC testing arrangement |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114248644A (en) * | 2021-12-14 | 2022-03-29 | 奥尔托射频科技(上海)有限公司 | Charging pile intelligent interface device, installation method thereof and charging pile |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114248644A (en) * | 2021-12-14 | 2022-03-29 | 奥尔托射频科技(上海)有限公司 | Charging pile intelligent interface device, installation method thereof and charging pile |
| CN114248644B (en) * | 2021-12-14 | 2023-08-11 | 奥尔托射频科技(上海)有限公司 | Intelligent interface device of charging pile, mounting method of intelligent interface device and charging pile |
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