基于无速度传感器的船舶交流推进电机模糊直接转矩控制策略

Control Strategy of Fuzzy Direct Torque for Ship Propulsion Motor Based on Speed Sensorless

基于直接转矩控制的普通电力推进船在低速航行时,船舶推进电机的转矩产生明显的周期性振动,为改善此问题,本文将模糊控制逻辑引入到推进电机调速系统中;同时针对电力推进船上速度传感器存在的维修、安装不方便等问题,引入无速度传感器技术。通过Matlab对改进系统进行仿真,结果表明改进后推进电机能够有效的减小转矩脉动,辨识后的转速能有效的跟踪系统的实际转速。

In this paper,in order to solve the large torque ripples which exist in ship electrical propulsionmotor based on conventional direct torque control(DTC)in low-speed navigation,fuzzy control theory isapplied in speed control system.At the same time,it aims at common speed sensor having difficulties ofmaintenance,inconvenient installation and other aspects,the speed sensorless technology is used.Theimproved system is simulated by Matlab,the results show that the improved ship electrical propulsion motorcan effectively reduce the torque ripple,and the identification speed can track actual speed of ship systemeffectively.