无直流母线电压传感器的永磁同步电机控制系统研究

发布时间：2018-05-14 07:52

本文选题：永磁同步电机 + 无直流母线电压传感器　；参考：《兰州交通大学》2017年硕士论文

【摘要】：随着稀土永磁体和电力电子技术的大力发展,PMSM(Permanent Magnet Synchronous Motors,永磁同步电机)被广泛应用在工业、交通、军事、航空等重要领域。对于一个完整的PMSM控制系统而言,需要多个传感器来传递信息,然而传感器的安装不仅增加了整个系统的成本和体积,而且传感器容易受工作环境影响会降低系统的可靠性。若传感器出故障,则需要用其余健康信息来重构这个故障信息。其中直流母线电压值不仅影响着控制系统中的逆变器容量、成本等,而且与PMSM的设计和运行性能都密切相关,是电力驱动系统的一个重要参数,因此本文针对无直流母线电压传感器的PMSM控制系统进行研究。对于PMSM控制系统而言,VC(Vector Control,矢量控制)和DTC(Direct Torque Control,直接转矩控制)是目前比较成熟的两大控制方法。VC以坐标变换为基础,实现了对磁场和转矩的解耦控制,而DTC在静止坐标系下直接实现磁链计算和电机转矩控制。近年来发展了一种MPCC(Model Predictive Current Control,模型预测电流控制)的控制方式,它可以提高速度响应,减小转矩脉动。本文主要采用MPCC和VC策略来控制无直流母线电压传感器的PMSM系统。本文主要研究内容分为以下几个方面:(1)在PMSM矢量控制系统下设计了模型参考自适应观测器,用它来代替直流母线电压传感器传递直流母线电压信息。此外进行观测器的改进,设计了滑模模型参考自适应直流母线电压观测器,并分别在速度、转矩、定子电阻、定子电感变化的情况下验证了后者观测器较良好的观测性能。(2)在带有滑模模型参考自适应直流母线电压观测器的PMSM矢量控制系统中,分别设计了电流和速度的积分滑模调节器,并在不同情况下(变化情况同(1)所述)验证其比PI调节器有优越的抗扰动性能。(3)将MPCC系统与VC系统进行仿真对比,并设计了基于积分滑模调节器和滑模模型参考自适应观测器的PMSM MPCC系统,并在不同情况下(变化情况同(1)所述)验证了MPCC系统的优越性能。
[Abstract]:With the development of rare earth permanent magnet and power electronics technology, PMSM permanent Magnet Synchronous Motors, permanent magnet synchronous motor (PMSM) is widely used in industry, transportation, military, aviation and other important fields. For a complete PMSM control system, multiple sensors are needed to transmit information. However, the installation of sensors not only increases the cost and volume of the whole system, but also reduces the reliability of the system. If the sensor fails, the rest of the health information needs to be reconstructed. The DC bus voltage not only affects the inverter capacity and cost in the control system, but also is closely related to the design and operation performance of the PMSM. It is an important parameter of the electric drive system. Therefore, the PMSM control system without DC bus voltage sensor is studied in this paper. For PMSM control system, DTC(Direct Torque control (vector control) and DTC(Direct Torque control (direct torque control) are two mature control methods. VC realizes decoupling control of magnetic field and torque based on coordinate transformation. DTC directly realizes flux chain calculation and motor torque control in stationary coordinate system. In recent years, a MPCC(Model Predictive Current Control, model predictive current control method has been developed, which can improve the speed response and reduce the torque ripple. In this paper, MPCC and VC strategies are used to control the PMSM system without DC bus voltage sensor. The main contents of this paper are as follows: 1) A model reference adaptive observer is designed under PMSM vector control system, which is used to transfer DC bus voltage information instead of DC bus voltage sensor. In addition, the observer is improved and the sliding mode model reference adaptive DC bus voltage observer is designed. In the case of stator inductance variation, the better observation performance of the latter observer is verified. (2) in the PMSM vector control system with sliding mode model reference adaptive DC bus voltage observer, the current and velocity integral sliding mode regulator are designed, respectively. At the same time, the MPCC system is simulated and compared with VC system under different conditions (the variation is the same as that described in No. 1), and it is proved that it has superior anti-disturbance performance than Pi regulator. The PMSM MPCC system based on the integral sliding mode regulator and the sliding mode model reference adaptive observer is designed, and the superior performance of the MPCC system is verified under different conditions.
【学位授予单位】：兰州交通大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TM341;TP273

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