电工技术学报2018，Vol.33Issue(8)：1674-1684,11.DOI:10.19595/j.cnki.1000-6753.tces.170374
共模电流扫描法在汽车电子部件电磁辐射预测中的研究与应用
Research and Application on Common-Mode Current Scan Methods to Predict Radiated Emissions of Automotive Components
贾晋 1赖志达 2王瑞妙 1汪泉弟3
作者信息
- 1. 重庆凯瑞质量检测认证中心有限责任公司汽车噪声振动和安全技术国家重点实验室 重庆 401122
- 2. 重庆理工大学车辆工程学院 重庆 400054
- 3. 国网重庆市电力公司电力科学研究院 重庆 401123
- 折叠
摘要
Abstract
Absorber lined shielded enclosure (ALSE) method of automotive electromagnetic compatibility (EMC) standard CISPR 25, also called the antenna method, requires a large anechoic chamber. However, the main measure of this method is the common-mode current distribution of the test cable bundle. Since this current distribution can be measured easily by current clamps that have much lower demands to the environment, it is possible to predict the level of radiated fields from the measured current distribution. This paper presents a field prediction method, which combines a measured common-mode (CM) current distribution with numerical computations for the radiated fields in the frequency range of 30~1 000MHz. Accordingly, three major problems can be solved compared with ALSE method. First, fast Fourier transform (FFT) based time-domain current or fitting algorithm based frequency-domain current amplitude can derive the needed phase distribution, for estimating the electric fields. Second, the radiation level produced by the common mode current can be calculated based on the common-mode radiation models of a cable bundle and a ground plate. Third, a calibration method is proposed to take into account the actual test environment of ALSE. Different solution approaches have verified the proposed prediction method.关键词
线性吸收屏蔽室/天线法/CISPR/25/辐射发射/线束/共模电流/相位Key words
Absorber lined shielded enclosure (ALSE)/antenna method/CISPR 25/radiated emission/cable bundle/common-mode current/phase分类
信息技术与安全科学引用本文复制引用
贾晋,赖志达,王瑞妙,汪泉弟..共模电流扫描法在汽车电子部件电磁辐射预测中的研究与应用[J].电工技术学报,2018,33(8):1674-1684,11.
