一种功率变换器分布式主从通信控制结构

A distributed master-slave communication control structure of power converter

针对现有分布式控制结构中的一些不足,首先基于曼彻斯特码,将整个系统控制功能分为主从两级,主控制器执行顶层运算功能,从控制器执行底层控制功能,从而有效地降低了单个控制器的设计难度和控制任务;然后,分析了主从式控制结构的同步网络、故障网络、数据网络的基本原理和实现方法,并提出了一种基于曼彻斯特码的数据通信方式,其通信速率高达40 Mb/s,可较好地满足绝大多数10kHz级开关频率的中大功率电力电子系统应用;最后,针对实验样机,对所提出的主从式通信控制结构的同步误差、故障处理以及数据通信进行了实验验证,结果表明了该种控制结构的正确性和可行性。

To deal with some deficiencies of the existing distributed control structure, a distributed master-slave communication control structure based on Manchester code is proposed. The system con- trol function is divided into two levels. The master controller performs the function of top-level calcu- lation while the slaver controller fulfills the function of the bottom-level control. Thus, it is possible to effectively overcome the difficulty in the design of a single controller so that the task of control can be fulfilled easily. Also, this paper analyzes the basic principle and useful methods of the synchronous network, fault network and data network of the master-slave control structure and proposes a new communication method based on Manchester code to make the communication rate up to 40 Mb/s, which can meet the most needs of the medium-high power electronic system with 10 kHz switching frequency in application. Finally, experiments are made to verify the synchronization error, fault pro- cessing and data communication of the proposed master-slave communication control structure. The results prove that the control structure is sound and feasible.