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Related Experiment Videos

A piezomotor using longitudinal actuators.

L Petit1, R Briot, L Lebrun

  • 1Inst. Nat. des Sci., Lab. de Genie Electrique et Ferroelectr., Villeurbanne.

IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
|February 5, 2008
PubMed
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A novel ultrasonic motor utilizing longitudinal piezoelectric actuators generates a traveling wave for rotational motion. Prototypes achieved 0.8 Nm torque and 120 rpm speed, demonstrating successful operation at 4 W mechanical output power.

Area of Science:

  • Mechanical Engineering
  • Materials Science
  • Electrical Engineering

Background:

  • Ultrasonic motors offer advantages in precision and miniaturization.
  • Traveling wave ultrasonic motors (TWUMs) utilize wave propagation for motion generation.
  • Piezoelectric actuators are key components in generating these waves.

Purpose of the Study:

  • To develop and characterize a new traveling wave type ultrasonic motor.
  • To investigate the motor's construction, theoretical modeling, and experimental performance.
  • To evaluate the potential of piezoelectric actuators in driving such motors.

Main Methods:

  • Development of a novel ultrasonic motor design using longitudinal piezoelectric actuators.
  • Theoretical modeling of wave generation and rotor interaction.

Related Experiment Videos

  • Experimental testing of motor prototypes to determine performance characteristics.
  • Measurement of torque, rotational speed, and output power.

    • Main Results:

    • A maximum torque of 0.8 Nm was achieved with a double rotor prototype.
    • A no-load rotation speed of 120 rpm was recorded.
    • The piezoelectric motor demonstrated successful operation at a mechanical output power of 4 W.

    Conclusions:

    • The developed traveling wave ultrasonic motor shows promising performance.
    • Longitudinal piezoelectric actuators are effective for generating the required progressive wave.
    • The motor design is suitable for applications requiring precise rotational motion and moderate power output.