柱状弯曲超声波电机的定转子接触方式和力传递模型  

Contact mode and force transferring model of cylindrical ultrasonic motors with bending vibration modes

作　　者：王剑[1] 郭吉丰[1] 鹿存跃[1] 王文浩[1] 田建创[1] 

机构地区：[1]浙江大学电气工程学院,杭州310027

出　　处：《声学学报》2007年第6期511-516,共6页Acta Acustica

摘　　要：柱状弯曲超声波电机在相机的镜头调焦、电动窗帘以及各种MEMS的微驱动等领域具有广泛的应用前景。本文针对柱状弯曲超声波电机,理论和实验提示了定、转子的单点和双点接触方式,提出了临界预紧力概念,给出了这两种方式下的定、转子间的力接触传递关系,进而给出了电机的机械特性和工作效率计算式,结合研制的电机样机进行分析,验证了本模型的准确性,并分析了电机性能与预紧力的关系。研制的φ14 mm的电机样机,实现堵转转矩达0.11 Nm,空转转速为300 r/min左右。Cylindrical ultrasonic motors can be widely used in many fields such as zoom and focus system of cameras, electric curtain and micro-driver of MEMS. This work concentrates on single-point and double-point contact modes between the stator and the rotor . which are proved by the theory and the experiment. then put forward a conception of the critical pre-pressure and the force transferring relation in two different contact modes mentioned above. moreover analyze the mechanical characteristics and the efficiency of the motors. Simulated results are confirmed by experimental ones. The proposed model is useful to analyze the relation between the motor characteristics and the pre-pressure. Finally the .14 mm prototype was fabricated. Its maximum torque is 0.11 Nm . the no-load speed is about 300 r/min.

关 键 词：超声波电机 力传递模型 接触方式 定转子 弯曲 柱状 MEMS 电动窗帘 

分 类 号：O426[理学—声学]