基于直接转矩控制的永磁同步电机转矩脉动抑制研究

发布时间：2018-04-19 01:31

本文选题：永磁同步电机 + 转矩脉动　；参考：《大连海事大学》2017年硕士论文

【摘要】：永磁同步电机直接转矩控制方法具有控制简单、响应迅速等优点,在工业领域中得到了广泛的应用,已成为一种高性能的交流调速方法。而永磁同步电机直接转矩控制也存在转矩和磁链脉动大的缺陷。针对永磁同步电机直接转矩控制中存在磁链和转矩脉动大的问题,本文在控制方法上提出了相应的改进策略。本文首先分析了永磁同步电机的数学模型和直接转矩控制的实现方法,搭建了传统直接转矩控制的仿真模型。之后,建立了直接转矩控制实验平台,完成了控制算法的编程和调试,实现了永磁同步电机的直接转矩控制。针对转矩和磁链脉动大的问题,先对零电压矢量对转矩调节的影响进行研究,提出了一种主动零电压矢量插入的控制策略,充分发挥零矢量对转矩"独特"的调节作用,在此基础上,引进单神经元PID与传统PID结合的控制策略。通过仿真验证了该控制策略对于抑制转矩脉动有效果,而该控制策略对于大功率、大转动惯量系统转矩脉动抑制效果更明显。对于定子电阻变化导致转矩和磁链发生变化从而产生脉动,对此本文对扇区进行细分,采用十八扇区,并将转矩和磁链误差经过两个PID输出定子电阻变化值对定子电阻进行补偿。仿真结果表明该控制策略对于小负载、转动惯量较小的系统抑制转矩和磁链脉动效果更显著。
[Abstract]:The direct torque control method of permanent magnet synchronous motor (PMSM) has many advantages such as simple control and quick response. It has been widely used in industrial field and has become a high performance AC speed regulation method.The direct torque control of permanent magnet synchronous motor (PMSM) also has the defects of high torque and flux ripple.Aiming at the problem of large flux linkage and torque ripple in the direct torque control of PMSM, this paper puts forward the corresponding improvement strategy in the control method.In this paper, the mathematical model of permanent magnet synchronous motor and the realization method of direct torque control are analyzed, and the simulation model of traditional direct torque control is built.After that, the direct torque control experiment platform is established, the control algorithm is programmed and debugged, and the direct torque control of permanent magnet synchronous motor is realized.In order to solve the problem of large torque and flux ripple, the effect of zero voltage vector on torque regulation is studied, and a control strategy of active zero voltage vector insertion is proposed to give full play to the "unique" effect of zero voltage vector on torque regulation.On this basis, a control strategy combining single neuron PID with traditional PID is introduced.The simulation results show that the proposed control strategy is effective for restraining torque ripple, and the control strategy is more effective for high power and large moment of inertia system.For the stator resistance change causes the torque and the flux chain to produce the ripple, this article carries on the subdivision to the sector, uses 18 sectors,The torque and flux error are compensated by two PID output stator resistances.The simulation results show that the proposed control strategy is more effective in reducing torque and flux ripple for the system with small load and small moment of inertia.
【学位授予单位】：大连海事大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TM341

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