Title: EMI analysis and suppression method of hybrid electric vehicle ignition system

Authors: Zongyu An; Quandi Wang; Yanxiao He; Zhuo Jia

Addresses: State Key Laboratory of Power Transmission Equipment and System Security and New Technology, Chongqing University, University A Campus, No. 174, Room 423, Shazhengjie Street, Shapingba District, Chongqing, 400044, China ' State Key Laboratory of Power Transmission Equipment and System Security and New Technology, Chongqing University, University A Campus, No. 174, Room 423, Shazhengjie Street, Shapingba District, Chongqing, 400044, China ' State Key Laboratory of Power Transmission Equipment and System Security and New Technology, Chongqing University, University A Campus, No. 174, Room 423, Shazhengjie Street, Shapingba District, Chongqing, 400044, China ' State Key Laboratory of Power Transmission Equipment and System Security and New Technology, Chongqing University, University A Campus, No. 174, Room 423, Shazhengjie Street, Shapingba District, Chongqing, 400044, China

Abstract: An investigation of the conducted radio-noise emission from a vehicle ignition system is described. It has been determined that the spark discharge generates considerable noise through the coupling capacitance that exists in ignition coil, resulting in serious conducted electromagnetic interference (EMI) problems. The dominant EMI path in the ignition circuit is identified by three different radiation experiments. A proposed ignition coil with shielding layer for the purpose of limit of EMI is developed. Experimental results demonstrate that interference can be dramatically reduced in the range from 16 MHz to 25 MHz by implementing the modified ignition coil, and the improvement increases above 16 MHz, reaching around 15 dB at some frequency points.

Keywords: HEVs; hybrid electric vehicles; electromagnetic compatibility; electrostatic interference; measurement; ignition coil; modelling; shielding layer; electromagnetic interference; EMI analysis; EMI suppression; hybrid vehicles; vehicle ignition systems.

DOI: 10.1504/IJEHV.2013.056307

International Journal of Electric and Hybrid Vehicles, 2013 Vol.5 No.2, pp.166 - 176

Received: 02 May 2013
Accepted: 03 Jul 2013

Published online: 09 Sep 2013 *

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