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PZT thin film actuated elastic fin micromotor

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2 Author(s)
Dubois, M. ; Lab. de Ceramique, Fed. Inst. of Technol., Lausanne, Switzerland ; Muralt, P.

A piezoelectric elastic fin micromotor based on a PbZr/sub 0.53/Ti/sub 0.47/O/sub 3/ thin film driving a micromachined silicon membrane was fabricated and studied. The stator was characterized by interferometry, and a laser set-up was used to measure the angular velocity and acceleration of the motor. The torque, the output power, and the efficiency of the device were extracted from these measurements. Values up to 1020 rpm and 0.94 /spl mu/Nm were observed for the velocity and the torque, respectively, which would be sufficient for a wristwatch application. The present version exhibited an efficiency of 0.17%, which could theoretically be increased to 4.8%.

Published in:

Ultrasonics, Ferroelectrics, and Frequency Control, IEEE Transactions on  (Volume:45 ,  Issue: 5 )

Date of Publication:

Sept. 1998

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