Title :
A piezoelectric micromotor using in-plane shearing of PZT elements
Author :
Friend, James ; Nakamura, Kentaro ; Ueha, Sadayuki
Author_Institution :
Precision & Intelligence Lab., Tokyo Inst. of Technol., Yokohama, Japan
Abstract :
A torsional micromotor, 3×4×8.5mm, was developed using planar bulk lead zirconium titantate placed upon a small rectangular prism made from phosphor bronze, with a tapered conical horn and a machined interior. By using a new measurement technique, the torque and efficiency versus speed were measured at several combinations of applied voltage and preload. At 87.1-mN preload, up to 0.1-N·mm torque and 425r/min in both directions were obtained by driving the system at resonance, 186.3kHz for counter-clockwise rotation, and 240.6kHz for clockwise rotation, while the overall efficiency peaked at slightly above 40%.
Keywords :
lead compounds; micromotors; piezoelectric materials; piezoelectric motors; shearing; titanium compounds; zirconium compounds; PZT elements; conical horn; in-plane shearing; machined interior; motor designs; nova; piezoelectric micromotor; planar bulk lead zirconium titantate; Clocks; Measurement techniques; Micromotors; Phosphors; Resonance; Shearing; Torque measurement; Velocity measurement; Voltage; Zirconium;
Journal_Title :
Mechatronics, IEEE/ASME Transactions on
DOI :
10.1109/TMECH.2004.834652