摘要
传统的感应电机直接转矩控制存在控制性能较弱的问题。针对该问题,提出了一种结合滑模控制和反馈线性化的感应电机直接转矩控制方案。采用了反馈线性化方法得到了转矩和定子磁链解耦的线性感应电机模型,使用该直观的线性化模型设计了直接转矩控制器,控制器能保留直接转矩控制的优势,同时还消除了磁链和转矩脉动。为了进一步提高控制鲁棒性,结合使用了滑模控制策略,并设计了边界控制提高了收敛速度。然后利用仿真平台分析了新型控制器的鲁棒稳定性。基于感应电机驱动试验平台开展了和传统直接转矩控制的对比试验,试验结果验证了新型控制策略的优势。
The traditional induction motor direct torque control has the problem of low performances. Aiming at it, a direct torque control was presented for induction motor drives with the sliding mode control and feedback linearization. The feedback linearization approach was proposed, and the linear IM model with decoupled torque and stator flux magnitude had been got. This intuitive linear model was used to implement a direct torque controller that preserves all DTC advantages and eliminates the flux and torque ripple. In order to further improve the robustness of the controller, combined with the sliding mode control strategy, the bound control was also designed to improve the convergence speed. The robust stability of the new controller was analyzed in simulations. Based on the induction motor driven platform, the contrast experiments with the traditional direct torque control had been taken, and the resuhs verify the advantages of the new control strategy.
出处
《微特电机》
北大核心
2017年第9期68-73,77,共7页
Small & Special Electrical Machines
基金
四川省教育厅重点项目(17ZA0013)
四川省青年科技基金项目(2015JQ0035)
关键词
感应电机
反馈线性化
滑模控制
直接转矩控制
电机驱动
induction motor
feedback linearization
sliding mode control （SMC）
direct torque control （DTC）
mo-tor drive
