摩托车点火系统传导骚扰仿真研究

Electromagnetic interference generated by the ignition system is one of the main reasons that cause the motorcycle EMC test failure. In order to discuss the conductive EMI generated by motorcycle ignition system，a high-frequency equivalent circuit model for each component of the ignition system is set up. Then, according to the connection relationship of the ignition system, a whole simulation model is assembled. The simulation results of the ignition voltage curve in time-domain and the conduction disturbance voltage in frequency-domain on the LISN are consistent with the measurement results，which verifies the system model. After explaining the conduction of the interference signal in the system，a method to suppress the conductive EMI by adding shielding material to the ignition coil is proposed. The simulation result shows that this method can achieve a good result.