A new mechanically ratcheting piezoelectric motor for high power applications

Jacob Loverich, Eric M. Mockensturm, Gary Koopmann, George A. Lesieutre

Research output: Contribution to journalConference article


A new piezomotor based on directly coupling a piezo-stack to a roller-clutch motion rectification mechanism is presented. Simple models are derived to provide the groundwork for the scaling of components for maximizing specific power. Results from the models provided insight into the construction of a prototype motor, which exhibited a maximum specific power of 30 W/kg, power of 40 W, stall torque of 5.0 N-m, and free-running speed of 350 rpm. Analyses of the operation of the prototype motor indicate that the primary mechanical losses in the motor result from compliance in the roller-clutch during the forward driving stroke of the stack. Resonance may be employed to minimize the effect of this compliance on the output power by amplifying the motion of the stack. This motor demonstrates potential to displace established motor technologies in some applications.

Original languageEnglish (US)
Pages (from-to)1153-1164
Number of pages12
JournalCollection of Technical Papers - AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference
StatePublished - Jan 1 2002
Event43rd Structures, Structural Dynamics and Materials Conference - Denver, CO, United States
Duration: Apr 22 2002Apr 25 2002


All Science Journal Classification (ASJC) codes

  • Architecture
  • Materials Science(all)
  • Aerospace Engineering
  • Mechanics of Materials
  • Mechanical Engineering

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