基于心跳机制的电动汽车充电CAN报文研究

针对电动汽车充电过程中,电动汽车与充电桩之间通信数据收发异常导致车载电池过充的问题,提出一种基于心跳机制的电动汽车充电CAN报文。本文首先对电动汽车充电通信架构进行设计,在传统电动汽车充电通信架构的基础上提出一种基于心跳报文监测机制的电动汽车充电通信架构;然后对传统CAN报文进行分析研究,提出在传统CAN报文的数据段中引入心跳信息,当充电信息报文和心跳报文准确且及时到达监测端时,SqNum(心跳信息位)进行自增运算,对于同一系列的CAN心跳报文,除了心跳信息位外,其他信息域的内容是相同的,心跳报文的设计可实时监测通信数据或通信链路的状态,发生异常时及时采取相应应急措施,可有效保护电动汽车和充电桩不受损坏。

Integrated design of brushless motor drive and control system for robot joints

To meet the requirements of high performance, low cost, and easy operation of the robot, a brushless motor drive and control system for the robot joint is designed, including CAN bus, WPF upper host computer development, and magnetic encoders, and other sensors, in which the STM32 F103 chip is used as the main control chip, and the DRV8323 is a brushless motor drive chip. The principle of field-oriented control(FOC) brushless motor drive is elaborated.Meanwhile, the drive and control system design is completed from both hardware and software aspects. Finally, the PID algorithm is used for the closed-loop speed test of the robot joint. The experimental result shows that the designed robot joints and control system run smoothly and reliably, have the characteristics of modularization and miniaturization, and are suitable for the control of micro-service robots and manipulators.

直流充电桩功能板块的高寒环境适应性研究

充电桩在高寒环境下性能易受环境因素影响而出现异常故障,当前采用逐个更换充电桩板块以确认故障原因的工程做法需要耗费较多人力物力。本文以直流充电桩为例,深入分析充电桩的元件组成,通过研究直流充电桩的各板块及其内部结构,利用基于故障树的分析方法,从理论上分析充电桩在高寒环境下容易发生故障的模块,有助于指导充电桩运维过程中快速故障定位;并进一步针对直流充电桩整体耐寒性能提出相应的改善措施,这对于指导高寒地区充电桩的生产和运行维护乃至提高充电桩的寿命有一定的现实意义。