Title :
Utilization of a piezoelectric polymer to sense harmonics of electromagnetic torque
Author :
Beccue, P. ; Neely, J. ; Pekarek, S. ; Stutts, D.
Author_Institution :
Dept. of Electr. Eng., Univ. of Missouri-Rolla, Rolla, MO, USA
Abstract :
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.
Keywords :
feedback; harmonic analysis; permanent magnet machines; piezoelectric materials; polymers; synchronous machines; time-domain analysis; torque measurement; durability; electrical properties; electromagnetic torque; feedback-based control; harmonic evaluation; harmonics measurement; harmonics sensing; low cost; mechanical properties; permanent magnet synchronous machine; piezoelectric polymer; polymer; time-domain simulation; wide-bandwidth sensors; Costs; Electromagnetic measurements; Hardware; Magnetic materials; Magnetic sensors; Mechanical sensors; Permanent magnet machines; Piezoelectric materials; Polymers; Torque measurement;
Journal_Title :
Power Electronics Letters, IEEE
DOI :
10.1109/LPEL.2003.822547
