永磁同步电机直接转矩控制高速运行范围拓宽

发布时间：2018-05-08 13:04

本文选题：永磁同步电机 + 直接转矩控制　；参考：《电机与控制学报》2014年09期

【摘要】：为拓宽直接转矩控制(direct torque control,DTC)方式下永磁同步电机(permanent magnet synchronous motors,PMSM)系统的高速运行范围,系统地分析了PMSM系统在最大转矩电流比、恒功率转速比和最大转矩电压比3种运行方式下的特点。根据DTC稳定运行要求,提出了基于转矩角限幅的空间矢量调制(space vector modulation,SVM)-DTC方法,拓宽了PMSM的高速稳定运行范围。其次利用定子磁链定向两相同步旋转坐标系下PMSM的数学模型,提出了基于改进转矩给定的DTC方法。仿真研究表明,改进方法均保留了DTC固有的动态性能优异、计算方便等优点,均可拓宽PMSM的高速运行范围。其中,基于改进转矩给定的DTC方法可使电机在同时满足电流和电压限幅的状态下实现高速稳定运行,性能更优。
[Abstract]:In order to widen the high speed operation range of permanent magnet synchronous motor (PMSM) system under direct torque control (DTC) mode, the maximum torque / current ratio of PMSM system is analyzed systematically. The characteristics of constant power speed ratio and maximum torque voltage ratio in three operation modes. According to the requirement of stable operation of DTC, the space vector modulation space vector modulationsSVMM-DTC method based on torque angle limit is proposed, which widens the high speed and stable operation range of PMSM. Secondly, using the mathematical model of PMSM in stator flux oriented two-phase synchronous rotating coordinate system, a DTC method based on improved torque is proposed. The simulation results show that the improved methods retain the advantages of excellent dynamic performance and convenient calculation of DTC, and can widen the range of high-speed operation of PMSM. Among them, the DTC method based on the improved torque can make the motor run at high speed and stable under the condition of current and voltage limiting simultaneously, and the performance is better.
【作者单位】：浙江大学电气工程学院;
【基金】：国家自然科学基金(51377141) 国家863计划(2011AA11A101)
【分类号】：TM341

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