Single-phase driven ultrasonic motor using two orthogonal bending modes of sandwiching piezo-ceramic plates

A compactultrasonic motor using sandwiching piezo-ceramic plates was developed, having advantages of low manufacturing costs, simple driving circuit, and high scalability. The stator is composed of twopiezoelectric plates attached to a T-shaped steel body. Two orthogonalbending modes can be excited by driving onepiezoelectric plate and the reversed motion of the rotor can be obtained by driving thepiezoelectric plate on the opposite side. The prototype stator with a size of 15 mm × 2.44 mm × 2 mm, operated at 44.8 kHz, was experimentally characterized, and a maximumtorque of 2 mN m was obtained. Maximum power of 2.3 mW and efficiency of 9% were produced with a load of 0.8 mN m at a rotation speed of 27 rpm.

Source: Review of Scientific Instruments - November 21, 2016 Category: Physics Authors: Yuting Ma, Minkyu Choi and Kenji Uchino Source Type: research