1.
IEEE Trans Ultrason Ferroelectr Freq Control
; 50(4): 361-7, 2003 Apr.
Artigo
em Inglês
| MEDLINE
| ID: mdl-12744391
RESUMO
A piezoelectric ultrasonic micromotor has been developed using a lead zirconate titanate (PZT) ceramic/metal composite tube stator that was 1.5 mm in diameter and 7 mm in length. The micromotor was operated in its first bending vibration mode (approximately 70 kHz), producing speeds from hundreds to over 2000 rpm in both rotational directions. The maximum torque-output was 45 microN-m, which is far superior to previous PZT thin film-based micromotors. This micromotor showed good reliability and stability for more than 300 hours of continued operation.