改进的感应电机静态补偿电压模型及低速性能分析  

Low-speed Performance Analysis of a Modified Statically Compensated Voltage Model for Induction Motors

作　　者：宋文祥[1] 阮智勇[1] 周杰[1] 尹赟[1] 

机构地区：[1]上海大学机电工程与自动化学院,上海市闸北区200072

出　　处：《中国电机工程学报》2013年第30期81-89,13,共9页Proceedings of the CSEE

摘　　要：针对静态补偿电压模型磁链观测器存在的低速运行时磁链估计不准确、低速性能不佳等问题,提出了一种改进的感应电机静态补偿磁链估计电压模型。该模型在高速运行时采用静态补偿电压模型进行磁链估计,低速时采用d-q电流模型进行补偿。该模型能在全速范围内实现平滑切换,有效提高了电机低速运行磁链估计性能。结合感应电机数学模型,通过理论推导建立了基于改进静态补偿电压模型的矢量控制非线性磁链动态模型,并利用李雅普诺夫线性化理论分析了该非线性动态模型在低速运行时的稳定性。同时,对电机参数不准确情况下的改进静态补偿电压模型磁链估计参数敏感性进行了分析。仿真研究和实验结果验证了理论分析的正确性。This paper proposes a novel modified statically compensated voltage model （SCVM） to remedy the poor performance and inaccurate flux estimation at low speed in the SCVM. In this combined model, the SCVM is employed at ~high speed while the d-q current model is used for compensation at low speed. This model can switchover smoothly for the complete speed range by utilizing the transitional compensated model and improve the low speed performance effectively. On the basic of motor mathematical models, the flux nonlinear dynamic equations of vector control systems based on the modified SCVM have been established by theoretical derivation. By utilizing Lyapunov linearization theory, the stability of the nonlinear system at low speed is analyzed. Meanwhile, the parameter sensitivity of this model is also analyzed under the assumption of inaccurate model parameters. Both simulation and experimental results verify the theoretical analysis.

关 键 词：感应电机 改进的静态补偿电压模型 矢量控制 低速性能 稳定性分析 

分 类 号：TM921[电气工程—电力电子与电力传动]