基于CAN总线车身电器控制系统干扰源解决措施的研究与探索

Interference source of body electrical control system based on CAN bus research and exploration of solutions

基于CAN总线的汽车车身电器系统中,电子产品数量众多,既有感性负载,脉冲发生装置,又有高频振荡源,这些对外不仅是潜在的干扰源,对车载电器自身也是干扰发射源。同时,由于汽车的高机动性,随时可能会处于各种高、低频的磁场中,产生的电磁干扰耦合影响电器系统的正常运转。基于以上这些干扰源,采用了电源转换滤波装置、抗空间电磁干扰等措施,最大程度的保护了车身电器系统的正常运转。

In the electrical system of automobile body based on CAN bus,there are a large number of electronic products,including inductive load,pulse generator and high-frequency oscillation source.These are not only potential interference sources,but also interference emission sources to the on-board electrical appliances themselves.At the same time,due to the high mobility of the car,at any time may be in a variety of high and low frequency magnetic field,the resulting electromagnetic interference coupling affects the normal operation of the electrical system.Based on the above interference sources,the power conversion filter device,anti-space electromagnetic interference and other measures are adopted to protect the normal operation of the body electrical system to the greatest extent.