摘  要：通过分析步进电机在升降频时发生失步、过冲等现象的原因，以及传统升降频曲线中存在的不足，结合步进电机的矩频特性提出了一种能保证电机在升降频阶段稳定工作的S形曲线升降频算法，并结合工程应用的特点对该算法进行了优化。文中以船载仪表系统为例介绍了该优化算法的应用方法。实验结果表明：该优化算法不仅提高了步进电机的运行稳定度，同时对电机的启动效率也有了很大改进。目前该算法已成功应用于散货船的仪表系统中。
关键词：步进电机；升降频；S形曲线

Abstract: The reason of losing step or overshooting when to accelerate or decelerate and the deficiency of traditional accelerating or decelerating method were analyzed.According to the analysis above，based on the characteristic of moment-frequency about step motor,an algorithm to accelerate or decelerate following s curve was propounded.Meanwhile,the algorithm is optimized according to engineering practice.Taking instrument system of vessels for example,an application method of this algorithm was introduced.As the test result proved,the degree of stop motor‘s stability is increased,and the start-up efficiency is improved.The algorithm has been applied in the instrument system of bulk freighter successfully now.
Key Words: Step motor；Accelerate or decelerate speed;S curve