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.
J. Neely et al., "Utilization of a Piezoelectric Polymer to Sense Harmonics of Electromagnetic Torque," Power Electronics Letters, Institute of Electrical and Electronics Engineers (IEEE), Sep 2003.
The definitive version is available at http://dx.doi.org/10.1109/LPEL.2003.822547
Mechanical and Aerospace Engineering
National Science Foundation (U.S.)
Keywords and Phrases
Feedback; Harmonic Analysis; Permanent Magnet Machines; Piezoelectric Materials; Polymers; Synchronous Machines; Time-Domain Analysis; Torque Measurement
Article - Conference proceedings
© 2003 Institute of Electrical and Electronics Engineers (IEEE), All rights reserved.