The study and application of CAN communication of rectifier parallel operation control system

Taking Master-slave rectifier parallel operation control system as the object of study, the paper adopts a control strategy of average-current, the current instructions of the Master rectifier is delivered promptly to the Slave rectifier pass by CAN Bus. Firstly, the measurement methods of the time that data transmits by CAN bus in parallel system is given, which provides a context for the system to reasonably choose CAN bus communication circle. Secondly the Simulation model of Master-slave rectifier parallel operation control system is set up in MATLAB for simulation, the current instructions of Master rectifier transmitted with delay to the Slave rectifier has a great influence on dynamic process of parallel operation. To offset the transmission delay, derivative compensating element can be added. The result of simulation: We have a good dynamic effect when derivative compensating element joined in.