船舶电力永磁同步推进电机空间电压矢量DTC

摘要

为能更好地控制船舶推进电机的动态和静态性能,在传统直接转矩控制的基础上提出基于空间矢量调制的直接转矩控制算法.通过空间矢量控制、磁链控制和转矩控制,介绍空间矢量调制直接转矩控制算法的基本原理;结合船舶永磁同步推进电机的数学模型,在MATLAB/Simulink中建立船舶电力推进系统的仿真模型;结合试验电机参数,对船舶的额定负载起动性能、转速转矩突变及低速性能进行仿真分析.仿真结果表明,基于空间矢量调制的直接转矩控制技术在船舶电力推进系统中具有良好的调速、调矩和低速性能,能很好地满足船舶电力推进系统的需求.通过搭建基于DSP的永磁同步电机直接转矩控制硬件试验平台,进一步验证基于空间电压矢量的直接转矩控制策略的正确性和可行性.%The Direct Torque Control (DTC) method based on Space Vector Modulation (SVM) is developed to improve the static and dynamic performance of the Permanent Magnet Synchronous Motor (PMSM) in a ship propulsion system.The principle of the SVM-DTC is introduced in detail and the model of ship electric propulsion system is set up with MATLAB/Simulink.Simulations are conducted to investigate the relationship between motor parameters and the system performances under different conditions,including full load start-up,abrupt torque/speed changes,and low speed operation.The simulation shows good performances under above conditions.A hardware test setup is built to verify the proposed SVM-DTC design.