Multi-Angle Rotational Actuation in a 0.8-mm-Thick Preload-Free Piezoelectric Micromotor

Micro motors can be used in numerous fields like Micro medical testing and treatment. To achieve a smaller size, micro piezoelectric motors in laboratories often omit the outer casing, which can lead to functional defects such as rotation only in one fixed direction or the need for external weights (which are not counted within the motors volume) to increase preload. However, this significantly reduces the practical value of micro piezoelectric motors. This paper proposes a new driving principle for piezoelectric motors to design a micro piezoelectric motor that can rotate at a wide range of angles (e.g. up to 80)without increasing the motors casing and does not require external weights, with a stator thickness of only 0.8 mm. This motor has significant application potential in OCT endoscopes and thrombectomy grinding heads