@article{LI2026, 
author = {Kangkang LI and Yufei WANG and Haibin ZHANG and Yuanbo CHEN and Guangqing WANG},
title = {Design and implementation of the driving circuit for a 1 mm cylindrical piezoelectric ultrasonic motor},
year = {2026},
journal = {Journal of Chongqing University},
volume = {49},
number = {5},
pages = {30-42},
keywords = {micro ultrasonic motor, piezoelectric ceramics, driving circuit, high frequency and low voltage, DSP},
url = {https://www.sciopen.com/article/10.11835/j.issn.1000-582X.2025.203},
doi = {10.11835/j.issn.1000-582X.2025.203},
abstract = {The performance of the driving circuit is critical for the stable and high-precision operation of micro piezoelectric ultrasonic motors. To meet the low-voltage drive and high-speed operation requirements of a 1 mm micro cylindrical piezoelectric ultrasonic motor, a transformer-inverter booster push-pull driving circuit based on the digital signal processing (DSP) 28335 chip is proposed. The DSP 28335 generates four pulse-width modulation (PWM) signals, which alternately drive four MOSFET switches. The inverter boosts and amplifies the voltage through a transformer, and an LC matching circuit filters the output to produce sinusoidal waves with equal amplitude and 90° phase difference, driving the motor. Detailed hardware and software design analyses are presented. Simulation and experiment results show that the output voltage is adjustable from 0 V to 100 V and the frequency from 15 kHz to 50 kHz. The no-load speed of the motor increases linearly with excitation voltage, reaching 480 r/min at 22 kHz and 50 V, satisfying the driving requirements of the 1mm cylindrical piezoelectric ultrasonic motor.}
}