永磁同步电机单环模型预测控制转矩脉动抑制

发布时间：2018-02-24 13:16

  本文关键词： 永磁同步电机 单环模型预测控制 约束优化 转矩脉动 迭代预测　出处：《西南交通大学》2017年硕士论文　论文类型：学位论文

【摘要】：近年来,随着永磁同步电机(PMSM)控制策略的发展,模型预测控制逐渐在永磁同步电机控制系统中得到应用。PMSM传统双环控制中速度环和电流环的周期差异的减小使得单环模型预测(SMPC)的优势逐渐凸显。单环模型预测将速度环和电流环合并成一个环,简化系统结构且能获得较好的控制性能。对永磁同步电机单环模型预测控制的研究具有一定的理论及应用意义。.本文首先在模型预测控制理论的基础上,设计了永磁同步电机单环模型预测控制系统并进行详细分析。针对其饱和约束问题,结合在实际的工业过程中对电机的多重约束,建立了永磁同步电机多约束单环模型预测控制模型。仿真结果表明其不仅具有较好的控制性能,而且能够有效处理多重约束条件。其次,分析了永磁同步电机转矩脉动原因并建立了转矩脉动数学模型,得出转矩脉动的周期性特性。在此基础上,针对永磁同步电机单环模型预测转矩脉动问题,在模型预测的基础上引入输出转速误差和控制增量误差模型,将基于误差模型的迭代学习与基于模型预测的计算结合,设计了永磁同步电机迭代预测控制算法。利用MATLAB/Simulink对PI控制和迭代预测两种控制方案进行对比分析,仿真结果表明迭代预测兼具快速动态响应和较高稳态精度优势,明显改善了永磁同步电机控制性能,证明了方案的可行性。最后基于PESX-Ⅱ组合电力电子传动开发平台和TMS320F2812型DSP控制芯片,对永磁同步电机单环模型预测控制系统进行硬件实验,验证了永磁同步电机单环模型预测具有动态响应快、静态误差小、抗负载扰动能力强的特点。
[Abstract]:In recent years, with the development of PMSM control strategy, Model predictive control is gradually applied in PMSM control system. The decrease of cycle difference between speed loop and current loop in PMSM traditional double loop control makes the advantage of single ring model prediction (SMPC) gradually prominent. The speed loop and the current loop are combined into one ring, The structure of PMSM can be simplified and better control performance can be obtained. The research on PMSM single loop model predictive control has certain theoretical and practical significance. Firstly, this paper based on the model predictive control theory, The single-loop predictive control system of PMSM is designed and analyzed in detail. The predictive control model of multi-constrained single-loop model for permanent magnet synchronous motor (PMSM) is established. The simulation results show that PMSM not only has good control performance, but also can deal with multiple constraints effectively. The reason of torque ripple of permanent magnet synchronous motor (PMSM) is analyzed, and the mathematical model of torque ripple is established, and the periodic characteristic of torque ripple is obtained. On the basis of this, the single loop model of PMSM is used to predict the torque ripple. On the basis of model prediction, the model of output speed error and control increment error is introduced, and the iterative learning based on error model is combined with the calculation based on model prediction. The iterative predictive control algorithm for PMSM is designed. The Pi control and iterative predictive control schemes are compared and analyzed by MATLAB/Simulink. The simulation results show that the iterative prediction has the advantages of fast dynamic response and high steady-state precision. The control performance of PMSM is obviously improved, and the feasibility of the scheme is proved. Finally, based on PESX- 鈪，

本文编号：1530365