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Research and Design of a Bidirectional Self-Propelled Traveling Wave Type Linear Ultrasonic Motor
Danhong Lu1, Nan Sun1, Yao Chen1
1School of Electric Power Engineering, Nanjing Institute of Technology, Nanjing 211167, China.
Micromachines
|March 28, 2026
Summary
This study introduces a novel bidirectional ultrasonic motor. By switching piezoelectric modes, it achieves directional control of traveling waves for versatile linear motion applications.
Area of Science:
- Engineering
- Materials Science
- Physics
Background:
- Ultrasonic motors offer precise motion control.
- Achieving bidirectional operation in linear ultrasonic motors presents design challenges.
Purpose of the Study:
- To propose and validate a bidirectional self-propelled traveling wave linear ultrasonic motor.
- To enable directional control of the traveling wave component for versatile operation.
Main Methods:
- Design of a straight-beam stator with dual piezoelectric ceramic plates.
- Implementation of switching between piezoelectric and inverse piezoelectric modes.
- Finite element modeling including modal, harmonic, and transient analysis.
Main Results:
- The proposed design enables bidirectional traveling wave propagation.
- Finite element analysis confirms the motor's operational principles.
- The design allows for alteration of the traveling wave's direction.
Conclusions:
- The developed linear ultrasonic motor successfully achieves bidirectional operation.
- The finite element analysis validates the proposed design and its performance.
- This motor offers a promising solution for applications requiring precise bidirectional linear motion.
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