大容量变换器的光纤CAN通信总线定时方案

Bit timing in optical fiber CAN communication of high power converters

为了使大容量电力电子变换器在恶劣的电磁环境中高速、可靠地传输大量信息,结合光纤和控制器局部网(CAN)技术,应用于通信系统。基于CAN的总线定时和同步机制,结合光纤传输,总线波特率1 M b/s和网络节点控制器不对称等特点,分析了该通信系统的总线定时要求,设计了可靠的总线定时方案。为验证定时方案的稳定性,对该通信系统进行了误码率实验。实验结果表明:该通信系统在此定时方案下运行时波特率较低,该定时方案具有一定的实用价值。

Integration of the optical fiber with the controller area network （CAN） guarantees timely, reliable data transmission in the bad electromagnetic environments of high power converters. The communication system uses optical fibers with a 1 Mb/s baud rate and distinct node controllers. The bit timing and the synchronization of the CAN protocol are analyzed to determine the communication system bit timing requirements for a reliable bit timing scheme. Baud Error Ratio （BER） experiments validate the stability and feasibility of the bit timing scheme.