A DUAL STATOR-RING ROTARY TRAVELING WAVE ULTRASONIC MOTOR
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- 英文论文题名：A DUAL STATOR-RING ROTARY TRAVELING WAVE ULTRASONIC MOTOR
- 论文作者：Shu-xiong WU ; Chao CHEN
- 英文论文作者：Shu-xiong WU ; Chao CHEN ; State Key Lab of Mechanics and Control of Mechanical Structures ; Nanjing University of Aeronautics and Astronautics
- 年：2016
- 作者机构：State Key Lab of Mechanics and Control of Mechanical Structures, Nanjing University of Aeronautics and Astronautics;
- 英文论文关键词：Ultrasonic motor ; Rod-shaped transducer ; Out-of-plane traveling wave
- 会议召开时间：2016-10-21
- 会议录名称：2016年全国压电和声波理论及器件应用研讨会论文摘要集
- 英文会议录名称：Abstract Book of 2016 Symposium on Piezoelectricity, Acoustic Waves and Device Applications
- 语种：英文
- 分类号：TM359.9
- 学会代码：AGLU
- 会议名称：2016年全国压电和声波理论及器件应用研讨会
- 会议地点：中国陕西西安
- 主办单位：中国力学学会、中国声学学会、IEEE UFFC分会
- 学会名称：中国力学学会
- 页数：2
- 文件大小：116k
- 原文格式：D
- 会议级别：全国
摘要
Background, Motivation and Objective The working principle of the circular traveling wave ultrasonic motor can be summarized as that the ring is directly excited to produce a traveling wave in the circumferential direction by the inverse piezoelectric effect of piezoelectric material. When the traveling wave travels on the ring, the particles in the inner wall of the ring can be generated in an elliptical path, which can promote the rotor's rotation under the action of the friction force or the fluid. Ultrasonic motors have the merits of high torque to volume ratio, high positioning precision, intrinsic holding torque, compared to the conventional electromagnetic motors. Some ultrasonic motors with bonded piezoelectric components have good performances, but the piezoelectric wafer may fall off from the bonding layer after a long time operation. This motor can be designed double output shaft has a great potential for applications of the actuator control. Statement of Contribution/Methods The motor based on out-of-plane bending vibration mode is proposed, fabricated and characterized. This motor is composed of a stator constituted with two ring and one rod-shaped transducer at the middle and two disk shaped rotors. There are four piezoelectric ceramic plates are bolted at the middle of the rod-shaped transducer and used to excite the stator's blending vibration mode. The ring is used to amplify the vibration amplitude of the rod-shaped transducer. The rotor pressed on the conical surface of the stator can be driven to rotate by the friction force induced by the traveling wave vibration of the stator. Results Two modes of the stator are investigated by a Laser Doppler Vibrometer PSV-300F-B(Polytec).The modal frequency of the transducer surface vibration is 26.72 KHz, and the theoretical calculation value is decreased by 2KHz. The modal frequency of driving surface the bending vibration is 26.87 KHz, and the theoretical calculation value is decreased by 0.5KHz. Modal experiments show that experimental frequencies are both lower than the calculated ones. It may be due to the difference between the material parameters and the actual parameters and the simplification of the finite element model. In order to obtain the mechanical properties of the prototype, the test platform is built and the related experiments are carried out. The experimental platform is composed of power amplifier, oscilloscope, signal generator, laser displacement sensor and computer. Experiments show that the working frequency bandwidth of the prototype is 26.8KHz-27 KHz, the range of the pre-pressure between the stator and rotors is 40-80 N, the maximum unloaded speed of the motor is 65 rpm and the maximum output torque is 0.06 Nm.Discussion and Conclusions The motor, which uses one first bending mode Langevin transducers between in its two stator rings to excite the traveling waves in its stator-rings, has been proposed and investigated. FEM is used to design the dimensions of the motor to make the stator-rings and Langevin transducers operate in resonance. Experimental measurement and FEM analysis are used to confirm the operating principle. The prototype motor has the overall size of D40 mm × 60 mm, the stator outer diameter of 35 mm, and the operating frequency around 27 k Hz. Under 250 V0-p operating voltage, its stalling torque is 0.06 Nm, no-load speed is 65 rpm. Our experiments show that this motor has a lot of room for improvement.
Background, Motivation and Objective The working principle of the circular traveling wave ultrasonic motor can be summarized as that the ring is directly excited to produce a traveling wave in the circumferential direction by the inverse piezoelectric effect of piezoelectric material. When the traveling wave travels on the ring, the particles in the inner wall of the ring can be generated in an elliptical path, which can promote the rotor's rotation under the action of the friction force or the fluid. Ultrasonic motors have the merits of high torque to volume ratio, high positioning precision, intrinsic holding torque, compared to the conventional electromagnetic motors. Some ultrasonic motors with bonded piezoelectric components have good performances, but the piezoelectric wafer may fall off from the bonding layer after a long time operation. This motor can be designed double output shaft has a great potential for applications of the actuator control. Statement of Contribution/Methods The motor based on out-of-plane bending vibration mode is proposed, fabricated and characterized. This motor is composed of a stator constituted with two ring and one rod-shaped transducer at the middle and two disk shaped rotors. There are four piezoelectric ceramic plates are bolted at the middle of the rod-shaped transducer and used to excite the stator's blending vibration mode. The ring is used to amplify the vibration amplitude of the rod-shaped transducer. The rotor pressed on the conical surface of the stator can be driven to rotate by the friction force induced by the traveling wave vibration of the stator. Results Two modes of the stator are investigated by a Laser Doppler Vibrometer PSV-300F-B(Polytec).The modal frequency of the transducer surface vibration is 26.72 KHz, and the theoretical calculation value is decreased by 2KHz. The modal frequency of driving surface the bending vibration is 26.87 KHz, and the theoretical calculation value is decreased by 0.5KHz. Modal experiments show that experimental frequencies are both lower than the calculated ones. It may be due to the difference between the material parameters and the actual parameters and the simplification of the finite element model. In order to obtain the mechanical properties of the prototype, the test platform is built and the related experiments are carried out. The experimental platform is composed of power amplifier, oscilloscope, signal generator, laser displacement sensor and computer. Experiments show that the working frequency bandwidth of the prototype is 26.8KHz-27 KHz, the range of the pre-pressure between the stator and rotors is 40-80 N, the maximum unloaded speed of the motor is 65 rpm and the maximum output torque is 0.06 Nm.Discussion and Conclusions The motor, which uses one first bending mode Langevin transducers between in its two stator rings to excite the traveling waves in its stator-rings, has been proposed and investigated. FEM is used to design the dimensions of the motor to make the stator-rings and Langevin transducers operate in resonance. Experimental measurement and FEM analysis are used to confirm the operating principle. The prototype motor has the overall size of D40 mm × 60 mm, the stator outer diameter of 35 mm, and the operating frequency around 27 k Hz. Under 250 V0-p operating voltage, its stalling torque is 0.06 Nm, no-load speed is 65 rpm. Our experiments show that this motor has a lot of room for improvement.
Background, Motivation and Objective The working principle of the circular traveling wave ultrasonic motor can be summarized as that the ring is directly excited to produce a traveling wave in the circumferential direction by the inverse piezoelectric effect of piezoelectric material. When the traveling wave travels on the ring, the particles in the inner wall of the ring can be generated in an elliptical path, which can promote the rotor's rotation under the action of the friction force or the fluid. Ultrasonic motors have the merits of high torque to volume ratio, high positioning precision, intrinsic holding torque, compared to the conventional electromagnetic motors. Some ultrasonic motors with bonded piezoelectric components have good performances, but the piezoelectric wafer may fall off from the bonding layer after a long time operation. This motor can be designed double output shaft has a great potential for applications of the actuator control. Statement of Contribution/Methods The motor based on out-of-plane bending vibration mode is proposed, fabricated and characterized. This motor is composed of a stator constituted with two ring and one rod-shaped transducer at the middle and two disk shaped rotors. There are four piezoelectric ceramic plates are bolted at the middle of the rod-shaped transducer and used to excite the stator's blending vibration mode. The ring is used to amplify the vibration amplitude of the rod-shaped transducer. The rotor pressed on the conical surface of the stator can be driven to rotate by the friction force induced by the traveling wave vibration of the stator. Results Two modes of the stator are investigated by a Laser Doppler Vibrometer PSV-300F-B(Polytec).The modal frequency of the transducer surface vibration is 26.72 KHz, and the theoretical calculation value is decreased by 2KHz. The modal frequency of driving surface the bending vibration is 26.87 KHz, and the theoretical calculation value is decreased by 0.5KHz. Modal experiments show that experimental frequencies are both lower than the calculated ones. It may be due to the difference between the material parameters and the actual parameters and the simplification of the finite element model. In order to obtain the mechanical properties of the prototype, the test platform is built and the related experiments are carried out. The experimental platform is composed of power amplifier, oscilloscope, signal generator, laser displacement sensor and computer. Experiments show that the working frequency bandwidth of the prototype is 26.8KHz-27 KHz, the range of the pre-pressure between the stator and rotors is 40-80 N, the maximum unloaded speed of the motor is 65 rpm and the maximum output torque is 0.06 Nm.Discussion and Conclusions The motor, which uses one first bending mode Langevin transducers between in its two stator rings to excite the traveling waves in its stator-rings, has been proposed and investigated. FEM is used to design the dimensions of the motor to make the stator-rings and Langevin transducers operate in resonance. Experimental measurement and FEM analysis are used to confirm the operating principle. The prototype motor has the overall size of D40 mm × 60 mm, the stator outer diameter of 35 mm, and the operating frequency around 27 k Hz. Under 250 V0-p operating voltage, its stalling torque is 0.06 Nm, no-load speed is 65 rpm. Our experiments show that this motor has a lot of room for improvement.
引文