Ultrasonic motor with embedded preload mechanism

Kazumi, Tomoya; Kurashina, Yuta; Takemura, Kenjiro

doi:10.1016/j.sna.2019.02.010

Cited by 29 publications

(8 citation statements)

References 18 publications

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“…In Kazumi et al (2019) [56], to overcome the limitation of external preload in an ultrasonic motor, a linear ultrasonic motor with a slider is proposed having an inherent preloading capability. The device is composed of a phosphor bronze stator having piezoelectric ceramic plates and a stainless steel U-shaped slider.…”

Section: Lusms Operating Through Differential Excitation Generated On...mentioning

confidence: 99%

A brief review on the recent evolution in piezoelectric linear ultrasonic motors

Mukhopadhyay¹,

Behera²,

Kumar³

2021

Eng. Res. Express

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This article represents the various recent advancements in the field of Piezoelectric Ultrasonic Motors, especially in linear type. The construction and operation principles evolving time to time. We have accumulated and presented a brief discussion on the linear ultrasonic motor including its working principles, initial designs, and recent advancements in this article. These motors have had increasing applications in recent years and have been developing rapidly due to their simplicity of construction and good performance. The potential applications are expanding lately to various areas such as medical devices, precise positioning systems, astronautical devices, tactile feedback systems, and many more. Owing to the wide range of applications, simple and compact design, rapidly increasing miniaturization, and the several advantages of the linear ultrasonic motor, it has been a vastly researched area in the last few decades. Continuous effort is being put into creating smaller and efficient designs, structures, and materials of the device, with stable and upgraded output performance, an acceptable range of frictional wear enabling prolonged usage.

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Section: Lusms Operating Through Differential Excitation Generated On...mentioning

confidence: 99%

A brief review on the recent evolution in piezoelectric linear ultrasonic motors

Mukhopadhyay¹,

Behera²,

Kumar³

2021

Eng. Res. Express

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“…is type of motor is divided into singlemode type and hybrid mode type. e former has a single modal [7][8][9][10][11] without stator modal degeneracy problems.…”

Section: Introductionmentioning

confidence: 99%

“…However, this kind of motor often has no common nodes leading to difficulties with stator fixation. In order to realize the reciprocating motion, different vibration modes of the same vibration mode [7] or different modes [8,9] are often adopted.…”

Section: Introductionmentioning

confidence: 99%

A Longitudinal-Bending Hybrid Linear Ultrasonic Motor and Its Driving Characteristic

Liu

Zhang

et al. 2022

Shock and Vibration

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As a new type of driver, linear ultrasonic motor (LUSM) is widely used in the high-tech field because of its low speed, high thrust, low noise, and no electromagnetic interference. However, as an actuator used in microdevices, most of the existing LUSMs are large in size and not compact in structure. In order to overcome these limitations, a new structure of linear ultrasonic motor’s stator is developed in this paper. The stator is similar to a tuning fork structure, which is divided into three parts: two driving feet, two driving legs, and the driving body. By using the first-order longitudinal vibration mode of the whole stator and the unique partial second-order bending vibration mode of the driving legs to achieve vibration mode degeneracy, a mode hybrid linear ultrasonic motor that is easy to miniaturize is proposed. Its working principle is analyzed. The dynamic analysis of the stator is carried out by using finite element software. The structure dimension of the stator and the driving frequency under the working mode are determined. At the same time, the feasibility of driving feet synthesizing elliptical motion is verified theoretically and experimentally. In addition, the LUSM test setup is built. The effects of driving frequency and Vpp on stator stall force and average velocity are studied. The results show that the maximum stall force can reach 99 mN, and the average velocity of the motor is 88.67 mm/s with Vpp = 320 V and driving frequency 80.2 kHz. The proposed LUSM is appropriate for use in occasions with quick return characteristics, like the controlling valve or nozzle of the printer. The research results provide guidance for the stator design of the linear ultrasonic motor.

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“…The results showed that the stiffness of the preloading mechanism was also a factor affecting the output performance of the motor. Since loading the preload will occupy a relatively large part of the motor space, Kazumi [14] inserted the preload loading device into the slider of the linear ultrasonic motor to achieve the miniaturization of the motor. All of the above studies have analyzed the effect of the preloading device on the performance of the motor but have neglected the selectivity of the preload for the application of the motor.…”

Section: Introductionmentioning

confidence: 99%

Preload Optimization Method for Traveling-Wave Rotary Ultrasonic Motor

et al. 2021

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Preload optimization is very important for ultrasonic motors’ design and application. In this paper, a novel method for a traveling-wave rotary ultrasonic motor is proposed. Firstly, based on linear regression and the analytic hierarchy process (AHP), the mapping between the drive characteristics, mechanical characteristics, speed stability, and preload of the traveling-wave-type rotary ultrasonic motor was established. Then, the characteristic curves of stalling torque, no-load speed, maximum efficiency, and speed stability with the change of preload method were measured with a new test platform. Finally, three traveling-wave rotary ultrasonic motors with optimized preload were used in a cooperative manipulator for validation. The experimental results showed that when the preload was optimized from 200 N to 310 N, the stalling torque of the motor increased by 20.7%, the maximum efficiency increased by 15.3%, the standard deviation of the speed decreased by 53.8%, and the no-load speed decreased by 5.5%. Therefore, it can be seen that the new preload optimization approach can significantly improve the performance indexes of ultrasonic motors and meet the practical requirements of direct-drive cooperative manipulators in engineering applications. The new preload optimization method offers advantages in motor output performance compared to conventional methods.

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Ultrasonic motor with embedded preload mechanism

Cited by 29 publications

References 18 publications

A brief review on the recent evolution in piezoelectric linear ultrasonic motors

A brief review on the recent evolution in piezoelectric linear ultrasonic motors

A Longitudinal-Bending Hybrid Linear Ultrasonic Motor and Its Driving Characteristic

Preload Optimization Method for Traveling-Wave Rotary Ultrasonic Motor

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