Utilization of a Piezoelectric Polymer to Sense Harmonics of Electromagnetic Torque

Jason Neely
Steven D. Pekarek, Missouri University of Science and Technology
Daniel S. Stutts, Missouri University of Science and Technology
Philip Beccue

This document has been relocated to http://scholarsmine.mst.edu/mec_aereng_facwork/3483

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In this paper, the use of a piezoelectric polymer material to measure the harmonics of electromagnetic torque produced by a permanent magnet synchronous machine is described. The advantages of the polymer include low cost, durability, and flexibility. In addition, wide-bandwidth sensors are relatively easy to design and couple to drive system hardware for harmonic evaluation or to use in feedback-based control. To illustrate the use of the polymer, the electrical and mechanical properties of three sensors are described. The results of time-domain simulation and hardware experiments are used to validate that the voltage obtained from the sensors is linearly related to the torque ripple produced by the machine.