Prediction method for low-frequency radiation emission caused by common-mode noise of high-voltage wire harness of electric car

A high-voltage wire harness and common-mode noise technology, applied in the field of low-frequency radiation emission prediction, can solve problems such as the contradiction between prediction accuracy and calculation efficiency, and achieve the effect of expanding the applicable stage and reducing computing resources

Inactive Publication Date: 2018-06-12
CHONGQING UNIV
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Problems solved by technology

[0003] In view of this, the object of the present invention is to provide a method for predicting low-frequency radiation emissions caused by common-mode noise in high-voltage wiring harnesses of electric vehicles, which solves t

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  • Prediction method for low-frequency radiation emission caused by common-mode noise of high-voltage wire harness of electric car
  • Prediction method for low-frequency radiation emission caused by common-mode noise of high-voltage wire harness of electric car
  • Prediction method for low-frequency radiation emission caused by common-mode noise of high-voltage wire harness of electric car

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[0041] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0042] The three-dimensional simulation model of the low-frequency radiation emission prediction method caused by the common mode noise of the high-voltage wire harness of electric vehicles provided by the present invention is as follows: figure 1 shown. This embodiment takes the low-frequency magnetic field emission of the whole vehicle required by GB 18387 as the pre-measurement, solves the port coupling characteristics through computer numerical values, tests the actual interference current through experiments, and obtains the antenna characteristic curve through computer simulation, specifically including the following steps:

[0043] S1: Carry out three-dimensional modeling of the high-voltage system of the vehicle, the main content of the modeling is the electric structure related to high-voltage and low-frequency radiation

[0044] ...

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Abstract

The invention relates to a prediction method for the low-frequency radiation emission caused by a common-mode noise of a high-voltage wire harness of an electric car, and belongs to the field of automobile EMC. According to the method, a lumped parameter equivalent circuit of interference equipment and a measurement antenna serves as a network peripheral item, and the method achieves the prediction of a radiation electric field and a magnetic field through the network peripheral item, characteristics of a network port and antenna calibration parameters, thereby reducing the modeling difficulty, achieving the circuit parameter decoupling, and overcoming a conflict between the precision calculation and calculation efficiency during the prediction of the common-mode radiation emission causedby a high-voltage system cable harness when the whole car is in a complex coupling environment.

Description

technical field [0001] The invention belongs to the field of automobile EMC, and relates to a low-frequency radiation emission prediction method caused by common-mode noise of a high-voltage wire harness of an electric automobile. Background technique [0002] Vehicle low-frequency radiated emissions are one of the regulatory requirements for electric vehicles. Due to its high voltage and high current characteristics, the high-voltage system of an electric vehicle is the main source of noise emitted by the vehicle's low-frequency radiation. In the process of automobile development, the earlier the EMC design can be carried out, the EMC problems can be found, and the more measures can be taken to solve the problems, the lower the cost. A large number of theories and engineering practices show that 90% of electromagnetic interference is caused by electromagnetic radiation of cables. The high-voltage system of electric vehicles involves many components, the topological relati...

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Application Information

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IPC IPC(8): G01R29/08G06F17/50
CPCG01R29/08G06F30/15Y02T90/00
Inventor 高锋叶城恺戴涵哲
Owner CHONGQING UNIV
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