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作 者:夏长亮[1] 邵桂萍[1] 史婷娜[1] 王香存[1]
机构地区:[1]天津大学电气与自动化工程学院,天津市南开区300072
出 处:《中国电机工程学报》2005年第12期138-142,共5页Proceedings of the CSEE
基 金:国家自然科学基金项目(50207006);天津市自然科学基金项目(05YFJMJC11300);教育部博士点基金项目(20040056021)。~~
摘 要:该文介绍了一种基于液体媒质的非接触型超声波电机,其转子浸于液体之中,不与定子直接接触,有效地克服了接触型超声波电机的易磨损、不能长时间连续工作等缺点,是超声波电机领域的一个新的研究方向。结合液体媒质超声波电机的基本结构及运行机理,文中阐述了电机运行过程中将超声振动所产生的能量通过液体传递给转子,从而驱动转子旋转这一能量传递的基本过程,揭示了液体中的雷诺剪切应力是电机声流场的驱动力。然后,用实验测定了电机转速与驱动频率、驱动电压、液体粘性、液位高度和转子半径之间的关系。并对实验结果进行了比较分析,且在此基础上结合本电机的运行机理以及驱动控制系统、液体环境和转子半径等因素对电机转速的影响,对液体媒质超声波电机的运行条件进行了优化分析。Being quite different from the contact ultrasonic motors, in the non-contact ultrasonic motor driving fluid directly, the rotor immersed in the fluid doesn’t contact with the stator directly. This motor solves many problems of the contact ultrasonic motor, such as shorter life expectancy and continuous running time, and becomes a new research direction in the field of the ultrasonic motor. This paper introduces the unique construction of this motor and the working mechanism. And then the course of transferring energy is discussed, in which the fluid is driven to flow in the circumferential direction when the ultrasonic vibration wave is traveling along the cylindrical stator, which is excited by the voltages, as a result, the rotor is driven by the medium of fluid. It is revealed that the shearing Reynolds’ stress in the fluid is the driving force of the fluid flow. After that, the effect of the fluid and its height on the resonance frequency and the relationship between the rotating speed and the driving frequency, the driving voltage, the fluid circumstances and the rotor radius are tested through the experiments. At the same time, based on the above analysis, allowing for the effect of the fluid circumstances and the rotor radius on the rotating speed of the motor, the paper puts a discussion on optimizing the working conditions of this motor.
关 键 词:超声波电机 液体媒质 实验研究 运行特性 驱动控制系统 运行机理 电机转速 非接触型 直接接触 研究方向 超声振动 运行过程 基本过程 能量传递 剪切应力 驱动频率 实验测定 驱动电压 液体粘性 液位高度 比较分析 优化分析
分 类 号:TM38[电气工程—电机] TK229.61[动力工程及工程热物理—动力机械及工程]
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