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原动仿真系统包括模拟调速系统和模拟励磁系统两大部分,是电力系统动态模拟的重要设备.模拟励磁系统对电力系统中的真实原动机励磁系统进行模拟.该文主要介绍一种基于DSP(TMS320LF2812)的原动仿真数字模拟励磁系统通信模块的硬件和软件设计,从硬件原理图的设计、芯片选择,软件设计等方面进行说明,应用VB和汇编语言进行上位机和下位机的程序设计,在程序设计过程中,用状态转移图取代程序流程图对程序的部分设计过程进行了说明,最后对程序设计中应注意的问题进行了讨论.“,”The simulation system of prime mover which included regulating speed of rotation and excitation system is one of the most important parts in the power system dynamic simulation laboratory. The letter simulates the real excitation part in power system. This paper mainly notes the design of hardware and software based on DSP in excitation simulation system communication module, and conduct a detailed explanation not only hardware schematic design and choice of chips but also design of software , then gives a design with VB and Assemble language between pc and mcu, and explains the design process with the appearance transfered diagram replacing procedure flow one,finally discues the noted question in Programming.