Design of a novel type ultrasonic motor for high torque generation

Oh, Jae Sub; Yuk, Hyung-Sang; Lim, Kee-Joe

doi:10.1007/s10832-012-9750-3

Cited by 5 publications

(2 citation statements)

References 6 publications

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“…It will significantly improve the reliability of the whole machine if the weak link is redundantly structured. Although Glenn and Hagood (1997), and Oh et al (2009, 2013), respectively, proposed a single-stator double-PZT structure for improving output torque in 1997 and 2009, no solution to improve the reliability of piezoelectric ceramics has been addressed.…”

Section: Introductionmentioning

confidence: 99%

A novel traveling wave rotary ultrasonic motor with piezoelectric backup function

Lin

Yang³

et al. 2023

Journal of Intelligent Material Systems and Structures

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To fulfill high-reliability requirements for aerospace applications, a novel traveling wave rotary ultrasonic motor with a piezoelectric backup function (Backup motor) is proposed in this paper. The backup function is enabled by the addition of a set of piezoelectric ceramics (PZT). Based on the ultrasonic motor of the CSX-60, a cantilever-tooth backup motor (CTBM) is designed and fabricated. This backup motor can operate in three working modes according to the excitation settings of PZTs, namely normal mode, backup mode, and enhanced mode. The relationships between three working modes’ performances are analyzed by finite element (FE) analysis and prototype tests. The results show that backup mode, as the substitution, can nearly reach normal mode’s performance, while enhanced mode is obviously higher than others. Furthermore, a modified backup motor with straight-tooth (STBM) and different sizes of PZT is designed and tested as a supplement to verify the feasibility of the proposal. In addition, the effect of stress reduction on PZT damage is verified by extreme working experiments. The comparison between the two types of motors indicates that STBM can provide better frictional drive performance. This proposal can provide a new reference for the subsequent reliability study of ultrasonic motors.

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Section: Introductionmentioning

confidence: 99%

A novel traveling wave rotary ultrasonic motor with piezoelectric backup function

Lin

Yang³

et al. 2023

Journal of Intelligent Material Systems and Structures

View full text Add to dashboard Cite

show abstract

“…In Figure 1, H is the stator thickness, H 1 is the stator tooth height, h = (H + H 1 )/2 is the distance from the stator tooth surface to the neutral plane, H 2 = H − H 1 is the stator base thickness, r h is the rotor inner radius, and r d is the stator inner radius. increase the input and output power and the output torque of TRUMs [6][7][8]. Nevertheless, those methods saddle TRUMs with disadvantages, such as large volume, complicated structure, and high power consumption, making them unsuitable for aerospace applications.…”

Section: Introductionmentioning

confidence: 99%

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

et al. 2019

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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.

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A Square-type rotary ultrasonic motor using longitudinal modes

Liu

Chen

et al. 2014

J Electroceram

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Design of a novel type ultrasonic motor for high torque generation

Cited by 5 publications

References 6 publications

A novel traveling wave rotary ultrasonic motor with piezoelectric backup function

A novel traveling wave rotary ultrasonic motor with piezoelectric backup function

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

A Square-type rotary ultrasonic motor using longitudinal modes

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