Immunity of CAN, CAN FD and Automotive Ethernet 100/1000BASE-T1 to Crosstalk From Power Electronic Systems

Reliable and fast data exchange is essential for many vehicle functions. For this purpose, special communication systems were introduced during the last years, e.g., LIN, CAN, or Automotive Ethernet. At the same time, more and more power electronic systems are integrated, e.g., for electric driving, causing electromagnetic disturbances. Because of the extended cable harness and short distances between the cables as well as the electrical devices, electromagnetic coupling between power electronic systems and communication systems is more likely. It may affect the reliability of data transmission. This article analyzes and compares the robustness of the automotive communication systems CAN, CAN FD, and Automotive Ethernet (100BASE-T1 and 1000BASE-T1) against common and differential mode disturbances from cable and PCB coupling. Simulations and measurements are shown to identify critical coupling configurations. The EMC performance of the different bus systems is discussed.