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A square-plate ultrasonic linear motor operating in two orthogonal first bending modes
Zhijiang Chen1, Xiaotian Li, Jianguo Chen
1Department of Materials Science and Engineering, College of Engineering, Peking University, Beijing, China.
Summary
A new piezoelectric ultrasonic linear motor uses a simple square plate design. This novel motor achieves significant driving force and speed with a cost-effective structure.
Area of Science:
- Materials Science
- Mechanical Engineering
- Electrical Engineering
Background:
- Conventional ultrasonic linear motors often have complex structures and high fabrication costs.
- Piezoelectric actuators are widely used in precision motion control applications.
Purpose of the Study:
- To propose and demonstrate a novel square-plate piezoelectric ultrasonic linear motor.
- To investigate the performance of a motor utilizing two orthogonal first bending vibration modes (B₁).
Main Methods:
- Fabrication of a single PZT ceramic plate vibrator with divided electrodes for exciting orthogonal B₁ modes.
- Operation of the motor using orthogonal voltage drives at its resonance frequency.
Main Results:
- The motor achieved a driving force of 1.8 N and a speed of 230 mm/s.
- Performance was measured under a 150 V(p-p) orthogonal voltage drive at 92 kHz resonance frequency.
Conclusions:
- The proposed piezoelectric ultrasonic linear motor offers a simple structure and low fabrication cost.
- It demonstrates advantages in driving force and operational simplicity compared to conventional designs.
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