Wear evaluation model of a linear piezoelectric ultrasonic motor considering temperature effect

Lv, Qibao; Yao, Zhiyuan; Jin, Yueqiang; Liu, Bing

doi:10.1016/j.ultras.2022.106822

Cited by 8 publications

(2 citation statements)

References 35 publications

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“…Metal, ceramic, and polymer are the commonly-used engineering materials [9]. Despite the heavy usage in conventional USMs [1,3], metals' large densities should be the main limitation for further enhancement in torque densities and/or power densities of USMs [33,34]. Fine ceramics (e.g.…”

Section: Introductionmentioning

confidence: 99%

Enhancement of torque density and power density of polymer-based ultrasonic motors via flexible usage of anisotropy in elastic property

Liu

Gao

et al. 2023

Smart Mater. Struct.

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The carbon-fiber-reinforced poly phenylene sulfide (PPS/CF), which exhibits low density, low energy dissipation, and relatively high elastic modulus among polymers, is a promising material as the vibrating body of lightweight ultrasonic motors (USMs). Interestingly, the flexible usage of the anisotropy in PPS/CF’s elastic property (induced by carbon fibers’ reinforcement) offers a new idea to enhance the torque densities and power densities of the polymer-based USMs. As the key issue of flexibly using the anisotropy, this study aims to accomplish the optimal arrangement of the carbon-fibers’ filling direction according to the structure, the vibration mode, and the piezoelectric material’s polarization direction of the PPS/CF-based motor by performing model construction, structural optimization, and experimental verification. Initially, the dynamic model capable of setting PPS/CF’s anisotropically elastic moduli with the changeable filling direction is established to analyze the vibration characteristics. Subsequently, to increase the vibration velocity, the stiffness, and the electromechanical coupling factors, the optimization is carried out for the PPS/CF-based ring-shaped vibrators, where the optimal angle between the filling direction and the vibrator’s bottom surface is estimated as 60°. Finally, a prototype of the PPS/CF-based vibrator 30 mm in diameter and 8.5 mm in height is fabricated to form a rotary motor, whose movement and load characteristics are investigated through experiments. At 250 V voltage and 24.42 kHz frequency, the motor yields the no-load rotation speed, the maximal torque, and the maximal output power of 99.3 r/min, 29.8 mNm, and 72 mW, respectively. Moreover, its torque density and power density reach respectively 7.1 Nm/kg and 17.1 W/kg, relatively high among the rotary motors with polymer vibrating bodies. This study validates the effectiveness of our idea and also provides a basic approach to design lightweight USMs that employ newly-developed materials with anisotropically elastic properties and good vibration characteristics.

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Section: Introductionmentioning

confidence: 99%

Enhancement of torque density and power density of polymer-based ultrasonic motors via flexible usage of anisotropy in elastic property

Liu

Gao

et al. 2023

Smart Mater. Struct.

View full text Add to dashboard Cite

show abstract

“…With the rapid rise of technical requirements, traditional motors have been unable to satisfy the modern scientific and engineering fields [6,7]. The development of next-generation motors with more excellent characteristics has become one of the most active research hotspots [8][9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Bionic Stepping Motors Driven by Piezoelectric Materials

et al. 2022

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By imitating the behavioral characteristics of some typical animals, researchers develop bionic stepping motors to extend the working range of piezoelectric materials and utilize their high accuracy advantage as well. A comprehensive review of the bionic stepping motors driven by piezoelectric materials is presented in this work. The main parts of stepping piezoelectric motors, including the feeding module, clamping module, and other critical components, are introduced elaborately. We classify the bionic stepping piezoelectric motors into inchworm motors, seal motors, and inertia motors depending on their main structure modules, and present the mutual transformation relationships among the three types. In terms of the relative position relationships among the main structure modules, each of the inchworm motors, seal motors, and inertia motors can further be divided into walker type, pusher type, and hybrid type. The configurations and working principles of all bionic stepping piezoelectric motors are reported, followed by a discussion of the advantages and disadvantages of the performance for each type. This work provides theoretical support and thoughtful insights for the understanding, analysis, design, and application of the bionic stepping piezoelectric motors.

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