A traveling-wave ultrasonic motor utilizing a ring-shaped alumina/PZT vibrator

Wu, Jiang; Mizuno, Yosuke

doi:10.1088/1361-665x/ab4d5d

Cited by 12 publications

(7 citation statements)

References 39 publications

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“…Mechanical performances showed that the motor can obtain rotary speed of 350 r/min and the maximum torque is 186 N•mm under the voltage of 300 Vp − p. Wu et al, fabricated & investigated a ring-shaped alumina/PZT vibrator to form a traveling-wave USM. The rotation speed of the alumina/PZT motor was larger than that of the stainlesssteel/PZT motor, meanwhile, it exhibited superior maximal-torque-to-voltage and maximal-output-power-to voltage ratios [102].…”

Section: Multivibratorsmentioning

confidence: 96%

The Roles of Piezoelectric Ultrasonic Motors in Industry 4.0 Era: Opportunities and Challenges

Wankhede¹,

Xu²

2021

Piezoelectric Actuators - Principles, Design, Experiments and Applications

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Piezoelectric Ultrasonic motors (USM) are based on the principle of converse piezoelectric effect i.e., vibrations occur when an electrical field is applied to piezoelectric materials. USMs have been studied several decades for their advantages over traditional electromagnetic motors. Despite having many advantages, they have several challenges too. Recently many researchers have started focusing on Industry 4.0 or Fourth Industrial revolution phase of the industry which mostly emphasis on digitization & interconnection of the entities throughout the life cycle of the product in an industrial network to get the best possible output. Industry 4.0 utilizes various advanced tools for carrying out the nexus between the entities & bringing up them on digital platform. The studies of the role of USMs in Industry 4.0 scenario has never been done till now & this article fills that gap by analyzing the piezoelectric ultrasonic motors in depth & breadth in the background of Industry 4.0. This article delivers the novel working principle, illustrates examples for effective utilization of USMs, so that it can buttress the growth of Industry 4.0 Era & on the other hand it also analyses the key Industry 4.0 enabling technologies to improve the performance of the USMs.

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Section: Multivibratorsmentioning

confidence: 96%

The Roles of Piezoelectric Ultrasonic Motors in Industry 4.0 Era: Opportunities and Challenges

Wankhede¹,

Xu²

2021

Piezoelectric Actuators - Principles, Design, Experiments and Applications

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“…The output power and efficiency corresponding to 360 N were higher than those to 240 and 480 N probably because the frictional loss was smaller [40,41]. Most TW motors cannot provide high efficiencies as the vibration velocities differ among the driving feet [21,31,35]. In contrast, only one wave crest exists on each vibrating body; this may suppress vibrationvelocity-difference-induced frictional loss and consequently enhance the efficiency.…”

Section: A Load Characteristicsmentioning

confidence: 98%

“…Besides, the calculated value of keff is ~30% (see Section II), in good agreement with the experimental results. Subsequently, the vibration velocity distribution was investigated via interferometric measurement [35]. The voltages were applied with power amplifiers (HSA4051, NF Corporation, Yokohama, Japan).…”

Section: Vibration Propertiesmentioning

confidence: 99%

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

Niu

Cao

et al. 2020

IEEE Access

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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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“…In contrast, the transducers of lowquality factor have lower frequency and longer wavelength with higher penetration power. They also have broad-band [25]. Q depends on the operating frequency, f 0 and the bandwidth, BW [20] as follow:…”

Section: Quality Factor Analysismentioning

confidence: 99%

Fabrication of metal–polymer matching layers to improve some ultrasonic transducers for NDT and calibration

Barakat

2023

J Mater Sci: Mater Electron

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This paper investigates the impact of different matching layers on the ultrasonic transducers’ performance. Matching layers are mostly used to solve the acoustic impedance matching problem between the piezoelectric element and the test specimen. To design good matching layers, we merged the metal–polymer and mass–spring systems. Their thickness was also optimized using the quarter-wavelength approach. Silver, alumina, and copper served as mass components, while parylene served as the polymer spring component. This was the first time to use such matching materials with lead zirconate titanate (PZT) transducers. The transducers’ sensitivity increased, the beam diameter broadened, the signal-to-noise ratio reduced, and the echo-height increased. According to the findings, the developed matching layers were extremely efficient in upgrading PZT transducers, making them ideal for a variety of non-destructive ultrasonic applications such as identifying defects in various materials. In addition, the new developed transducers may be useful in calibration.

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A traveling-wave ultrasonic motor utilizing a ring-shaped alumina/PZT vibrator

Cited by 12 publications

References 39 publications

The Roles of Piezoelectric Ultrasonic Motors in Industry 4.0 Era: Opportunities and Challenges

The Roles of Piezoelectric Ultrasonic Motors in Industry 4.0 Era: Opportunities and Challenges

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

Fabrication of metal–polymer matching layers to improve some ultrasonic transducers for NDT and calibration

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