Piezoelectric actuators driven by the saw-tooth-like motion of a stator

Takano, Takehiro; Tomikawa, Yoshirô; Aoyagi, Manabu; Kusakabe, Chiharu

doi:10.1016/0041-624x(95)00068-e

Cited by 8 publications

(10 citation statements)

References 1 publication

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“…Similar to the PZT teeth motor, the bending mode measurement shows that the out-of-displacement along the principle axis (line between Electrode B and Electrode C) is much greater than that along the non-principle axis (line between Electrode A and Electrode B) as shown in Figure 2. 15. This verifies that the vibration is along the non-principle axis.…”

Section: Bending Mode Measurementsupporting

confidence: 59%

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Single Vibration Mode Standing Wave Tubular Piezoelectric Ultrasonic Motor

Park¹

2021

Preprint

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The objective of this thesis is to report the single vibration mode standing wave tubular piezoelectric ultrasonic motors developed. Piezoelectric motors are driven by reverse piezoelectric effects which converts an input of ultrasonic frequency of electrical energy into an output of mechanical movement. There are many advantages of piezoelectric ultrasonic motors compared to electromagnetic motors such as simple structure, high energy density, and high torque at low speed. Three prototypes are designed and fabricated. Two motors are fabricated using PZT cylindrical tube; one with PZT teeth and the other with metal teeth. A third motor using brass tube with PZT plates attached is fabricated. After design and fabrication of three prototypes, the performances of the motors are tested using a test apparatus for speed and torque.

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Section: Bending Mode Measurementsupporting

confidence: 59%

“…Takehiro et al report two disk type motors in 1992 and 1996 [14,15]. He uses a steel disk of 60 mm diameter and 1.8 mm thickness for a stator design where piezoceramics in different shapes are bonded to.…”

Section: Non-tubular Type Ultrasonic Motors 1421 Disk Type Ultrasonic Motorsmentioning

confidence: 99%

Single Vibration Mode Standing Wave Tubular Piezoelectric Ultrasonic Motor

Park¹

2021

Preprint

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“…We investigated a mode-degenerated biphase-type motor in the primary degeneration using the X-rotated LiNbO 3 Y-plate with W=L of 0.26. 11)…”

Section: Degeneration Of Longitudinal and Flexural Modesmentioning

confidence: 99%

“…[5][6][7][8] Similarly, a piezoelectric single crystal has been investigated for applications in SAW linear-type motors, 9,10) and we reported bulk-mode resonant-type USMs fabricated using a LiNbO 3 plate. 11,12) Although the piezoelectric constants of LiNbO 3 are smaller than those of leadcontained piezoceramics, a LiNbO 3 resonator has a small dielectric loss and a small deterioration of vibrational characteristics even when the vibration velocity is large. 13,14) These features indicate that a single-crystal resonator is suitable for miniature motors driven at a relatively high frequency.…”

Section: Introductionmentioning

confidence: 99%

Design and Characteristics of Mode-Coupling LiNbO₃ Ultrasonic Motor Depended on Width-to-Length Ratio of the Stator Vibrator

Tamura

Morooka

Yamayoshi

et al. 2010

Jpn. J. Appl. Phys.

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A miniature ultrasonic motor fabricated from a LiNbO 3 rectangular plate was studied to improve its rotation characteristics. In this motor, the coupling modes of in-plane longitudinal and flexural modes caused by crystal anisotropy are used to realize a single-phase drive motor. The mode coupling vibrator is designed to have crystal cut angles and the width-to-length ratio W =L of the vibrator shape. In this study, we noted the new coupling condition of W =L % 0:84 compared with the conventional ratio of W =L ¼ 0:255. We considered the mechanism of the mode coupling and the design of the stator vibrator by finite element method analysis and experiments. From the results, we fabricated and investigated prototype motors of the vibrator with dimensions of 10 Â 2:55 Â 0:5 and 4:10 Â 3:48 Â 0:5 mm 3 . The newly designed motor with the vibrator of W =L ¼ 0:849 improved the motor characteristics for the equalization of rotation in both directions. #

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“…Consequently, the authors are working toward a new high-speed rotational ultrasonic motor with a thin shaft rotor, 9) and we have studied some LiNbO 3 biphase motors, the main feature of which is reduced thickness and high revolution speed exceeding 5000 rpm. 10,11) Moreover, a single phase drive motor has been presented for which a simple drive and structure without electrode division for greater miniaturization. The single phase motor is composed of a diagonally symmetric vibrator with a mode coupling phenomenon.…”

Section: Introductionmentioning

confidence: 99%

Single Phase Drive Ultrasonic Motor Using LiNbO₃ Rectangular Vibrator

Tamura

Shibata

Aoyagi

et al. 2008

jjap

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Nonrelativistic. relativistic and semiempirical pseudopotentials have been used for investigating the effects of relativity and correlation on molecular properties (bond lengths, dissociation energies, force constants, multipole moments and ionization energies) of T1H+, TIH and TIH,. Spin-orbit effects are taken into account by using a quasirelativistic two-component pseudopotential. The influence of the core-valence correlation is accounted for by a core-polarization potential. Results obtained with the semiempirical pseudopotentials are in good agreement with experiment.

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Piezoelectric actuators driven by the saw-tooth-like motion of a stator

Cited by 8 publications

References 1 publication

Single Vibration Mode Standing Wave Tubular Piezoelectric Ultrasonic Motor

Single Vibration Mode Standing Wave Tubular Piezoelectric Ultrasonic Motor

Design and Characteristics of Mode-Coupling LiNbO₃ Ultrasonic Motor Depended on Width-to-Length Ratio of the Stator Vibrator

Single Phase Drive Ultrasonic Motor Using LiNbO₃ Rectangular Vibrator

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Piezoelectric actuators driven by the saw-tooth-like motion of a stator

Cited by 8 publications

References 1 publication

Single Vibration Mode Standing Wave Tubular Piezoelectric Ultrasonic Motor

Single Vibration Mode Standing Wave Tubular Piezoelectric Ultrasonic Motor

Design and Characteristics of Mode-Coupling LiNbO3 Ultrasonic Motor Depended on Width-to-Length Ratio of the Stator Vibrator

Single Phase Drive Ultrasonic Motor Using LiNbO3 Rectangular Vibrator

Contact Info

Product

Resources

About

Design and Characteristics of Mode-Coupling LiNbO₃ Ultrasonic Motor Depended on Width-to-Length Ratio of the Stator Vibrator

Single Phase Drive Ultrasonic Motor Using LiNbO₃ Rectangular Vibrator