电力推进在船舶动力系统中应用得越来越多，本文对船用永磁同步电机直接转矩控制进行仿真研究。针对传统永磁同步电机直接转矩控制中存在的磁链和转矩脉动较大，逆变器开关频率不稳定等问题，将滑模变结构控制策略引入。设计转矩和磁链2个滑模控制器，取代传统直接转矩控制中的2个滞环比较器，再运用空间矢量脉宽调制方法，控制电机运行。仿真结果表明这种控制策略能有效减小传统直接转矩控制存在的磁链和转矩脉动，实现逆变器开关频率恒定，并且对系统参数变化及外界扰动具有鲁棒性强的优点。
The electric propulsion is used more and more in the ship power system. The simulation of direct torque control of permanent magnet synchronous motor is studied in this paper. The sliding mode variable structure control (SMC) strategy is introduced to solve the problems of large flux and torque ripple in direct torque control of permanent magnet synchronous motor (PMSM). Design two sliding mode controllers of torque and flux linkage to replace the two hysteresis comparators in the conventional direct torque control, and then use the space vector pulse width modulation (SVPWM) to control motor operation. The simulation results show that this control strategy can effectively reduce the existing flux and torque ripple in the conventional direct torque control and keep the inverter switching frequency be constant, and it is strongly robust to system parameter variations and external disturbance.
2017,39(10): 88-91 收稿日期：2016-09-12
DOI：10.3404/j.issn.1672-7649.2017.10.017
分类号：U665.11
作者简介：高川(1991-),男,硕士研究生,研究方向为电机控制
参考文献：
[1] 张丛, 沈爱弟. 船舶电力推进螺旋桨负载模拟系统的研究[J]. 船舶工程, 2011, 33(4):25-27. ZHANG Cong, SHEN Ai-di. Research on propeller load simulation system for marine electrical propulsion[J]. Ship Engineering, 2011, 33(4):25-27.
[2] 陆旦宏, 金龙, 张仰飞. 基于空间电压矢量细分和调制的永磁同步电机直接转矩控制[J]. 微电机, 2012, 44(12):6-9. LU Dan-hong, JING Long, ZHANG Yang-fei. Direct torque control of permanent magnet based on space vector subdivision and modulation[J]. Micromotors, 2012, 44(12):6-9.
[3] 张华强, 王新生, 魏鹏飞, 等. 基于空间矢量调制的直接转矩控制算法研究[J]. 电机与控制学报, 2012, 16(6):13-18. ZHANG Hua-qiang, WANG Xin-sheng, WEI Peng-fei. Study on direct torque control algorithm based on space vector modulation[J]. Electric Machines and Control, 2012, 16(6):13-18.
[4] 盛利涛, 黄云龙, 陈国定. 基于恒定开关频率的永磁同步电机直接转矩控制[J]. 微电机, 2007, 40(3):67-69. SHENG Li-tao, HUANG Yun-long, CHEN Guo-ding. Direct torque control of permanent magnet synchronous motor based on constant switching frequency[J]. Micromotors, 2007, 40(3):67-69.
[5] 宋承霖, 王庆贤, 刘泉宝. 基于新型滑模观测器的永磁同步电动机的直接转矩控制[J]. 微电机, 2015, 48(12):65-68. SONG Cheng-lin, WANG Qing-xian, LIU Quan-bao. Permanent magnet synchronous motor direct torque control based on an improved sliding mode observer[J]. Micromotors, 2015, 48(12):65-68.
[6] 李政, 胡广大, 崔家瑞. 永磁同步电机调速系统的积分型滑模变结构控制[J]. 中国电机工程学报, 2014, 34(3):431-437. LI Zheng, HU Guang-da, CUI Jia-rui. Sliding-mode variable structure control with integral action for permanent magnet synchronous motor[J]. Proceedings of the CSEE, 2014, 34(3):431-437.
[7] ZHANG X, SUN L, ZHAO K. Nonlinear speed control for PMSM system using sliding-mode control and disturbance compensation techniques[J]. IEEE Transactions on Power Electronics, 2013, 28(3):1358-1365.
[8] 刘彦呈, 任俊杰, 王宁. 永磁同步电机旋转坐标系滑模观测器设计研究[J]. 电机与控制学报, 2015, 19(7):36-44.
[9] 王杰, 刘桃生, 张红涛, 等. 舰船推进系统中永磁同步电机的滑模控制[J]. 电气传动, 2013, 43(7):53-57.
