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考虑一拍滞后的PMSM电流环改进PI调节器

DOI: 10.13334/j.0258-8013.pcsee.2014.12.007, PP. 1882-1888

Keywords: 一拍滞后,PI调节器,电流环,动态性能

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Abstract:

数字控制方式通常存在一拍滞后延时。这种延时容易引起PI调节器出现超调和振荡,给永磁同步电机电流环带宽的提高带来不利影响。理论分析基础上,提出一种简易的改进方法,在调节器输出环节考虑一拍滞后的影响,达到提升电流环动态性能的目的;提出一种PI参数设计规则,实现对电流无超调的快速控制。仿真和实验结果表明,所提改进方案可使电流在两个周期内无超调地跟踪上电流指令,并且可使PI参数的稳定域拓宽近一倍。所提改进方案可显著提高电流环动态性能,而且需要增加的计算量少,实用性强。

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