New Breakthroughs in Ultrasonic Motor Stability Technology in China

At the monthly meeting of the China Association for Science and Technology periodical held on November 29th, a paper entitled “Speed ​​Wave Type Rotary Ultrasonic Motor for Speed ​​Stability” was published in the “Journal of China Electromechanical Engineering” by Dr. Wang Jinpeng of Nanjing University of Aeronautics and Astronautics. Research was highlighted.

The traveling wave type rotary ultrasonic motor is abbreviated as an ultrasonic motor and is widely used in precision positioning of high-end fields such as aerospace. With the development of high technology, the application system has imposed higher requirements on the control accuracy of the motion process, and increasing the speed stability has raised new requirements for the development of ultrasonic motors.

This article has improved the structure of the existing ultrasonic motor, designed a self-aligning structure that can automatically center the rotor relative to the stator, and redesigned some parts and related experiments. The results show that the improved speed fluctuation of the ultrasonic motor is greatly reduced, the main performance index is greatly optimized, and the cost is reduced, which has great promotion and application value.