Polymer-Based Ultrasonic Motors Utilizing High-Order Vibration Modes

Wu, Jiang; Mizuno, Yosuke; Nakamura, Kentaro

doi:10.1109/tmech.2018.2794379

Cited by 65 publications

(41 citation statements)

References 25 publications

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“…A parameter β for measuring the significance of the low speed and high torque In summary, the working principle and structure of the prototype may not be innovative, but we propose a new method from a technical point of view to make the motor have lower speed and greater torque, which is also emphasized in this paper. In order to further prove the validity of the research results, we compared the prototype with some commercial products and designs published in recent literature, such as the product PMR70ZK of NUAA Super Control Technology Co., Ltd. (www.scnuaa.com, China), the product USR60-S3 of SHINSEI Corporation (www.shinseimotor.com, Japan), the product PSM60S-A of Piezo Sonic Corporation (www.piezo-sonic.com, Japan), the polymer-based ultrasonic motor designed by Wu et al [26], the metal/polymer-matrix material compound motor designed by Li et al [27], and the ring-type motor using a radial bending mode designed by Chen et al [28], all of which have similar structure and size, as shown in Table 6. From the list, it can be seen that the motor 70HB has the lowest maximum-speed but the highest stall-torque, showing significant low speed and large torque characteristics.…”

Section: Discussionmentioning

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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Section: Discussionmentioning

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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“…[89,90] The study indicates that polymerbased traveling wave ultrasonic motors can achieve light weight and worked Under the corrosive environment of metal. [91][92][93] Additionally, Cao et al [94] designed a PPS-based bimodal USM that can achieve a maximum no-load speed of 207 r/min and maximum torque of 2 mN•m under 350 Vp-p.…”

Section: Optical Engineeringmentioning

confidence: 99%

A Review of Application and Development Trends in Ultrasonic Motors

Li¹,

Wen²,

Jia³

et al. 2020

ES Mater. Manuf.

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The structure and performance of ultrasonic motors have gradually improved with the emergence of new materials, techniques, and structural forms. Therefore, the application scope of this technology is also expanding, especially in the field of high-end equipment. This paper conducts a review of research on the application status and progress at the frontier of research on ultrasonic motors. A summary and classification of both the status of application and cutting-edge research progress are presented, including the use of ultrasonic motors in aerospace, precision, biomedical and optical engineering and the influence on ultrasonic motor design resulting from the breakthrough in advanced processing and preparation technology, structural and functional integration technology, low voltage drives and open-loop control systems. Moreover, the performance of products developed with the aid of ultrasonic motors and representative devices are compared; and state of the art ultrasonic motor designs are discussed and summarized. Finally, potential future research efforts and prospects are highlighted.

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“…(4) Calculate keff through finite element analysis, of which the detailed procedures are given in refs. [4] and [31]. In the meantime, m is derived by accumulating each part's weight.…”

Section: B Design Proceduresmentioning

confidence: 99%

“…The resonance frequency fr, antiresonance frequency fa, motional admittance Ym0, and bandwidth corresponding to 0.707 times of peak admittance Δf were obtained from the admittance curves (note that they were measured when the transducers connected the vibrating bodies). Using these values, keff, mechanical quality factor Qm, motional resistance Rm, motional capacitance Cm, and motional inductance Lm were estimated as [4,14,34…”

Section: Vibration Propertiesmentioning

confidence: 99%

“…Ultrasonic motors (USMs) convert electrical energy to mechanical energy on the basis of inverse piezoelectric effect and achieve actuation by frictional force [1][2][3]. Different from electromagnetic motors, they possess the merits of quick response, self-locking at the power-off state, and absence of electromagnetic radiation [4][5][6]. In particular, linear USMs are potentially applicable to some electromechanical system (e.g., precision instruments and optical devices) [6][7][8][9] as some of them have satisfactorily large outputs (e.g., the maximal thrust force is ~50 N and the maximal output power is >20 W) [10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

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A Traveling-Wave Linear Ultrasonic Motor Driven by Two Torsional Vibrations: Design, Fabrication, and Performance Evaluation

Niu

Cao

et al. 2020

IEEE Access

Self Cite

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In this study, we design and fabricate a tank-track-shaped stator working in two torsional modes to form a traveling-wave (TW) linear ultrasonic motor (USM). The stator comprises two torsional transducers and two kidney-shaped vibrating bodies. When voltages with a certain phase are applied to the transducers, two in-phase TWs are excited on the vibrating bodies to frictionally drive the slider. Here, the torsional vibration guarantees strong electromechanical coupling, and meanwhile, the tank-track shape ensures plural driving points and low weight; these features may facilitate realizing high thrust force density and high power density of linear motors. To examine the feasibility, first, we constructed a stator prototype 116 mm in length, 91 mm in width, and 32 mm in thickness and explored its vibration properties. The minimal standing wave (SW) ratio reaches 1.21 and the small SW components are desirable for TW motors. Then, we measured the load characteristics and found that, at the working frequency of 54.34 kHz and the phase shift of −110°, the maximal thrust force and maximal output power were 96.1 N and 27.8 W, respectively. Moreover, the thrust force density and power density reached respectively 234.1 N/kg and 67.8 W/kg, relatively high compared to the values of most conventional linear motors. This study verifies the feasibility of our proposal and paves a new way of designing powerful linear USMs. INDEX TERMS Linear ultrasonic motor, torsional vibration, traveling wave, thrust force density, power density.

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Polymer-Based Ultrasonic Motors Utilizing High-Order Vibration Modes

Cited by 65 publications

References 25 publications

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

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

A Review of Application and Development Trends in Ultrasonic Motors

A Traveling-Wave Linear Ultrasonic Motor Driven by Two Torsional Vibrations: Design, Fabrication, and Performance Evaluation

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