scholarly journals On the Technology of Acoustic Utility. Acoustic Information and Energy. High-Torque Traveling Wave Ultrasonic Motor Using the Bolt-Clamped Langevin Transducers.

2001 ◽  
Vol 67 (657) ◽  
pp. 1235-1240
Author(s):  
Jun SATONOBU ◽  
Noritoshi NAKAGAWA ◽  
Toshihiko TSUBOUCHI ◽  
Atsushi KATAMOTO
Keyword(s):  
Traveling Wave ◽  
Ultrasonic Motor ◽  
Acoustic Information ◽  
High Torque

scholarly journals Design and Experiment of a Large-Aperture Hollow Traveling Wave Ultrasonic Motor with Low Speed and High Torque

2019 ◽  
Vol 9 (19) ◽  
pp. 3979 ◽  
Author(s):  
Jun Liu ◽  
Zi-Jie Niu ◽  
Hua Zhu ◽  
Chun-Sheng Zhao
Keyword(s):  
Traveling Wave ◽  
High Performance ◽  
Power Transmission ◽  
Ultrasonic Motor ◽  
Vibration Velocity ◽  
Outer Diameter ◽  
Low Speed ◽  
Torque Density ◽  
Aperture Ratio ◽  
High Torque

To realize applications involving low speed and high torque in the high-performance actuator industry, especially in the aerospace field, we propose a novel 70H traveling wave rotary ultrasonic motor (TRUM) with an outer diameter of 70 mm and an aperture ratio of 53% (the ratio between the aperture and outer diameter). The power transmission mechanism between the stator and the rotor is analyzed, and a method for realizing low-speed–high-torque characteristics of TRUMs is proposed. ANSYS software is used to simulate the modal parameters of the stator, and the ratio β between the normal amplitude and the tangential vibration velocity of the stator is proposed. The larger the value of β, the lower the speed and the higher the torque. Furthermore, two prototype motors are fabricated, namely, 70HA and 70HB. Compared with 70HA, the maximum no-load speed of the improved 70HB (50 rpm) is decreased by 23.1% and the maximum stall torque (2.4 N∙m) is increased by 100%. Besides this, with a smaller mass of 210 g and a higher torque density of 11.43 N∙m/kg, 70HB has fundamentally different mechanical characteristics.

A traveling wave ultrasonic motor of high torque

Ultrasonics ◽  
2006 ◽  
Vol 44 ◽  
pp. e581-e584 ◽  
Author(s):  
Y. Chen ◽  
Q.L. Liu ◽  
T.Y. Zhou
Keyword(s):  
Traveling Wave ◽  
Ultrasonic Motor ◽  
High Torque

Power Harvesting from the Vibration-Induced by the Piezoelectric Stator of Traveling Wave Rotary Ultrasonic Motor

2011 ◽  
Vol 317-319 ◽  
pp. 616-620 ◽  
Author(s):  
Guang Qing Wang ◽  
Zhong Wei Zhao
Keyword(s):  
Energy Conversion ◽  
Analytical Model ◽  
Traveling Wave ◽  
Mechanical Energy ◽  
Ultrasonic Motor ◽  
Maximum Output ◽  
Induced Voltage ◽  
Power Harvesting ◽  
Conversion Model ◽  
The Relationship

In this article, a novel electro-mechanical energy conversion model of power harvesting from the vibration-induced the piezoelectric stator of the traveling wave rotary ultrasonic motor was proposed. Based on the curvature basis approach, the relationship between the deduced voltage and the mechanical stain induced by piezoelectric polarization was formulated. In addition to the relationships between the maximum induced voltages at the resonance frequency, the conversion energy density and the dimensions of the piezoelectric stator were also derived. The analytical model shows that the vibration-induced voltage is proportional to the exciting electrical voltage magnitude and square of height of the piezoelectric ceramic (PZT) but is inversely proportional to the permittivity of PZT and the damping coefficient of the stator. Some simulations and experimental results demonstrate that the maximum output voltage coincides with the energy conversion analytical model.

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