基于全阶磁链观测器下电主轴直接转矩控制系统的仿真

目的研究电主轴全速范围内直接转矩控制系统的性能，提高电主轴定子磁链观测精度．方法在定子静止坐标系下电主轴数学模型的基础上，采用定子全阶磁链观测器观测定子磁链，建立电主轴直接转矩控制系统．对电主轴状态值和测量值之间偏差进行反馈校正，并把反馈校正项与估计磁链的电主轴数学模型结合起来，建立含有闭环状态估计的误差补偿器的全阶磁链观测器；利用Matlab／Simulink构建全阶磁链观测器，对构建的模型进行仿真，得到定子磁链的仿真波形．结果全阶磁链观测器下直接转矩控制系统取得了比较优异的特性曲线。对于转速和转矩控制具有较高的控制精度．结论全阶磁链观测器在电主轴直接转矩控制系统中动态性能反映良好，采用极点配置方法确定的全阶磁链观测器模型有效地减少了运行过程中温度、频率和磁路等因素所造成的影响．

The Motorized Spindle Direct Torque Control System Simulation Based on Full-Order Flux

This paper is to study the performance of DTC system（ direct torque control）within the Motorized Spindle full-speed range, and to improve the observation precision of Motorized Spindle stator flux by adopting the Full-order stator flux observer. The paper constructs a Motorized Spindle DTC system based on the mathematical model of Motorized Spindle under a static stator reference frame; revises the deviation between status value and measured value of the Motorized Spindle, then builds a Full-order magnetic flux observer with error-compensator based on close-loop state estimation by combining the feedback correction term and the mathematical model of Motorized Spindle with flux estimation; builds a Full-order flux observer and simulates the Motorized Spindle DTC system by Matlab/Simulink so that the simulative waveform of stator flux would be obtained. The correctness of Full-order stator flux observer at various speed ranges is verified. Fullorder u-n stator flux observer shows satisfactory dynamic performance in Motorized Spindle DTC system;the u-n stator flux observer model that is constructed by choosing the proper way to set the pole of observer reduces the interference of temperature, frequency, magnetic path etc.