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Method for locating EMC standard exceeding part of automobile circuit system

A technology of automotive circuit and positioning method, which is applied in the direction of measuring electricity, measuring electrical variables, and measuring interference from external sources, etc. It can solve the problems of radiation and conduction interference, and many wiring harnesses, and achieve the effect of high efficiency and easy operation

Pending Publication Date: 2020-11-27
奇瑞新能源汽车股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Various controllers in the car, DCDC, MCU are all strong interference sources, and the wiring harness is long and long, so the radiation and conduction interference is very serious

Method used

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  • Method for locating EMC standard exceeding part of automobile circuit system
  • Method for locating EMC standard exceeding part of automobile circuit system
  • Method for locating EMC standard exceeding part of automobile circuit system

Examples

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Embodiment 1

[0016] This embodiment proposes a method for locating parts where the EMC of the automotive circuit system exceeds the standard, and provides a reference for improving the EMC problem of the entire vehicle.

[0017] like figure 1 As shown, this embodiment is aimed at a pure electric vehicle, and the circuit system of the vehicle includes a low-voltage load 1, a B-level voltage load 2, a low-voltage battery 3 (12V battery), a high-voltage battery 4 and a loop interlock controller 5. The Class B voltage load 2 is equipped with a low-voltage module 21 and a high-voltage module 22 inside, and the low-voltage module 21 is provided with a loop interlock interface and is connected to the low-voltage battery 3 and the loop interlock controller 5 through the low-voltage wiring harness 6 , the high-voltage module 22 is provided with a loop interlock interface and connected to the high-voltage battery 4 through the high-voltage wire harness 7; the low-voltage load 1 is connected to the l...

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Abstract

The invention aims to provide a method for locating an EMC (Electro Magnetic Compatibility) standard exceeding part of an automobile circuit system, and provides a reference for improving the EMC problem of a whole automobile. The method comprises the following steps that firstly, under the condition that a circuit system works normally, the electromagnetic radiation emission condition of a wholeautomobile is scanned for the first time through an anechoic chamber, so that the radiation intensity value of an EMC standard-exceeding frequency band is obtained; a load or a module to be tested isisolated from the circuit system; the load or module to be tested is in a non-working state; then, on the premise that the automobile test working condition is consistent with the primary scanning condition, secondary scanning is carried out on the electromagnetic radiation emission condition of the whole automobile by using the anechoic chamber; the conditions of the two times of scanning are compared; and whether the load or the module to be tested influences the radiation intensity value of the EMC standard exceeding frequency band or not is determined, if not, the load or the module to betested is not the EMC standard exceeding part of the EMC standard exceeding frequency band, and if so, the load or the module to be tested is the EMC standard exceeding part of the EMC standard exceeding frequency band.

Description

technical field [0001] The invention belongs to the technical field of automobile electromagnetic compatibility. Background technique [0002] As a strategic emerging industry supported by the state, new energy vehicles have attracted the attention of many OEMs. As the top priority of new energy vehicles, electromagnetic compatibility performance directly or indirectly affects the safety of the vehicle and passengers, as well as the subjective experience of passengers. Therefore, doing a good job in electromagnetic compatibility of the whole vehicle can effectively improve the electromagnetic emission and electromagnetic interference of the whole vehicle, improve the anti-interference performance of new energy vehicles in the external complex electromagnetic environment, and reduce the interference performance of the vehicle to the outside world. [0003] Compared with traditional vehicles, the EMC problems of new energy vehicles are more prominent. The power of new energy...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/00
CPCG01R31/002G01R31/006
Inventor 任印连吴洪涛顾民韩友国姚朝华杨玉梅徐承付亓志辉
Owner 奇瑞新能源汽车股份有限公司
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