摘要
针对异步电动机(IM)转矩脉动以及抗干扰能力差的问题,设计了基于模糊滑模控制(FSMC)与负载转矩补偿的新型直接转矩控制(DTC),取代传统PID速度调节器的是一种滑模控制器。为解决滑模控制器中负载转矩脉动的问题,用模糊逻辑控制器取代了传统滑模控制律中的不连续部分,可以明显降低异步电动机在低速运转时的转矩脉动。提出了一种负载转矩观测器来估计未知的负载转矩。负载转矩观测器用来估计负载转矩扰动,估计作为速度环的前馈补偿。仿真结果表明:在低速负载转矩扰动时,该设计具有更好的动态响应和速度性能、更高鲁棒性和更强的抗干扰能力。
Aiming at problem of torque ripple and bad anti-interference capability of induction motor （ IM ）, a novel direct torque control（DTC） based on fuzzy sliding mode control （FSMC）with load torque compensation is designed. The conventional PID speed regulator is replaced by a sliding mode controller. To solve the problem of torque ripple of load in sliding mode controller, a fuzzy logic controller replaces the discontinuous part of the conventional sliding mode control law. It can obviously reduce the torque ripple of IM at low speed. In addition, a load torque observer is proposed to estimate the unknown load torque. The load torque observer is used to estimate load torque disturbances and the estimation is used as the feed-forward compensation in the speed loop. The simulation results show that the design has better dynamic response and speed performance, high robustness and strong anti-interference to load torque disturbance at low speed.
出处
《传感器与微系统》
CSCD
2017年第7期103-105,109,共4页
Transducer and Microsystem Technologies
关键词
异步电动机
直接转矩控制
模糊滑模控制
负载转矩观测
induction motor （ IM ）
direct torque control （ DTC ）
fuzzy sliding mode control （ FSMC ）
load torque observer
