【作者】 张晓飞；

【导师】 姚绪梁；

【作者基本信息】 哈尔滨工程大学 ， 电力电子与电力传动， 2006， 硕士

【摘要】 吊舱推进是近年来出现的一种新的船舶电力推进方式，得到了国际造船界和航运界的高度重视。国内对这方面的研究虽起步较晚，但发展迅速。本文介绍了吊舱式电力推进系统的结构，分析了这种结构与传统电力推进系统相比具有的优点和缺点。分别建立了船体、螺旋桨和推进电机的数学模型，详细分析了考虑吊舱影响时三者的能量关系和相互影响，并且对采用永磁同步电机的吊舱式电力推进系统进行了计算机仿真。 随着永磁材料的发展，永磁同步电机开始应用于电力推进领域，在以往的永磁同步电机推进系统中，大多采用矢量控制方式进行调速，但是矢量控制的算法比较复杂，而且控制性能易受参数变化影响。直接转矩控制是继矢量控制之后被普遍看好的一种交流调速方式，具有广阔的发展前景，目前个别型号的吊舱式电力推进系统已经开始采用直接转矩控制方式。本文介绍了直接转矩控制的原理，对永磁同步电机直接转矩控制的基本问题进行了分析，并且针对定子磁链漂移及其补偿方法进行了深入讨论。介绍了永磁同步电机转矩直接控制系统中各个子模块的功能和具体的实现方式，提出了一套永磁同步电机直接转矩控制的具体实施方案，并根据这套方案建立了基于Matlab／Simulink的仿真模型，利用该模型行了仿真分析，仿真结果表明该系统具有良好的性能指标。最后重点讨论了永磁同步电机无机械传感器调速系统的实现，提出了一种以直接计算法为基础的改进型永磁同步电机转子角速度观测模型，仿真结果表明该模型具有一定的精度。 本论文开展了吊舱式电力推进系统和永磁同步电机转矩直接控制的探索性研究工作。通过理论分析和计算机仿真积累了一些的经验，为课题的进一步的深入研究奠定了基础。更多还原

【Abstract】 Pod propulsion is a new sort of electric propulsion. International shipbuilding and shipping group has attached great importance to this mode. Only in recent years , the research about pod propulsion is developed in China. But we have made some progress and we assure that pod propulsion has a wide foreground. In this paper, the structure of pod electric propulsion system is introduced, the advantage and disadvantage compared with general propulsion is analyzed, the math model of ship, propeller and machine is set up and analyze the interaction among the three parts considering the influence of pod. Pod electric propulsion system driven by permanent magnet synchronous motors (PMSM) is also simulated by computer.Compared general motor, PMSM is smaller, lighter and more efficient, so it’s suitable for pod electric propulsion system. At present, with the development of permanent magnet material, PMSM has been a normal configuration for new pod thrusters. In the past, vector control(VC) method is usually applied in PMSM drive systems. But the arithmetic of VC is too complex, and the control performance is easily affected by parameters. Direct torque control(DTC) is a new kind of AC timing method after VC. DTC has simple structure and fast torque response. It has been applied in various fields. It is also introduced in some pod propulsion systems recently. In this paper, the principle of DTC is introduced, some elementary problems of PMSM DTC is also analyzed. Excursion of stator flux and the compensatory method is introduced. The function and configuration of sub-models of PMSM DTC system is discussed, the scheme of this system is brought forward, and the simulating model based on Matlab/simulink is set up. The results of simulation validate the feasibility of this system. At last, the problem of PMSM drive system without mechanical sensor is discussed. A sensorless method based on stator flux is presented, and the result of this method is simulated by computer, the result is very accurate to some extent.更多还原