【作者】 周华伟；

【导师】 刘国海；

【作者基本信息】 江苏大学 ， 控制理论与控制工程， 2006， 硕士

【摘要】 本文研究工作围绕面贴式永磁同步电机直接转矩控制开展，主要是直接转矩控制策略研究和基于DSP TMS320F240数字实验平台的设计，并且对实验中涉及的一些问题，如磁链观测、转子初始位置观测和相电压观测等作了研究。 在阐述永磁同步电机数学模型的基础上，分析了永磁同步电机直接转矩控制的机理。详细地分析了定子磁链扇区划分的原理、电压空间矢量在永磁同步电机直接转矩控制中的作用且明确了零电压矢量的作用、以及电压空间矢量选择的依据，并且分析了传统直接转矩控制的缺陷。仿真和实验验证了永磁同步电机传统直接转矩控制策略的可行性、转矩响应的快速性以及对外干扰和电机参数摄动的鲁棒性，同时实验结果表明零电压矢量在直接转矩控制中能减小转矩脉动，提高系统稳态性能。 针对传统直接转矩控制策略所施加电压空间矢量数目有限导致转矩脉动大的缺陷，提出了基于电压矢量细分的永磁同步电机直接转矩控制策略。利用定子磁链扇区细分和电压矢量细分来减小磁链位置观测误差及磁链和转矩补偿误差，从而抑制转矩和磁链脉动。仿真和实验验证了该控制策略的可行性，提高了系统的稳态性能，同时保留了系统的鲁棒性。 针对传统直接转矩控制定子磁链位置观测误差而导致转矩脉动大的缺陷，提出了基于新型区域电压矢量表的永磁同步电机直接转矩预测控制策略。利用预测控制的方法，根据磁链和转矩误差选择任意相位和幅值的电压空间矢量，从而减小转矩脉动，同时该控制策略避免了定子磁链所在扇区的确定，同时保留了系统原有的鲁棒性。仿真和实验验证了该控制策略的可行性，同时在保留系统原有优良性能的同时提高了系统的稳态性能。 在分析了系统转矩脉动根本原因的基础上，提出了基于定子磁链自适应预测控制的永磁同步电机直接转矩控制策略。利用定子磁链自适应预测控制的基本原理，从根本上彻底补偿转矩和磁链误差，从而抑制转矩和磁链脉动。仿真和实验验证了该控制策略的有效性和可行性，且提高了系统的稳态性能。更多还原

【Abstract】 In this thesis, the research works are focused on the Direct Torque Control (DTC) of Surface Permanent Magnet Synchronous Motor (SPMSM). Control strategies, flux observation, rotor initial position detection, phase voltage calculation, and the DSP-based PMSM DTC experiment platform design are studied. Theoretical analysis, simulations and experiments are presented in order to demonstrate the effectiveness of the proposed techniques and the flexibility of PMSM DTC.Firstly mathematical models of SPMSM are set up based on the motor electromagnetism, and an in-depth research is conducted on PMSM DTC. Secondly the basic issues are discussed such as the principle of stator flux linkage sections partition, the effect and the selection of the voltage space vectors in PMSM DTC. Then a variable-speed PMSM DTC system is set up to verify the DTC theory in PMSM. Also an investigation about the effect of the zero voltage space vectors in the PMSM DTC system is described. If using the zero voltage space vectors rationally, not only the DTC system can be driven successfully, but also torque ripples are reduced and the performance of the system is improved.By analysising the drawback of the conventional PMSM DTC, a new DTC strategy based on voltage space vectors and flux linkage regions subdivision is introduced. The more flux linkage regions make the more accurate estimation of flux linkage position and the more voltage space vectors make the more optional choice according to dispersions of the torque and flux linkage. Consequently, the ripples of torque and flux linkage are diminished and the performance of the DTC system is improved.Only one voltage space vector is applied in each sampling period in conventional PMSM DTC, which results in large ripples in torque and flux linkage, and nonconstant switching frequency. A new DTC algorithm based on the area voltage vectors table has been proposed. It includes mainly two parts: one is area voltage vectors table and the other is predictive control of torque and flux. By using the predictive control strategy, voltage space vectors with arbitrary phase angle and magnitude can be selected to control torque and flux from a voltage vectors area, which can lead to high dynamic performance and can reduce更多还原