Design of a Piezoelectric Sensor-Based Controller for Mitigation of Torque Ripple in a Brushless DC Machine 2002-01-3223
Brushless dc machines with non-sinusoidal back-emf are often characterized by significant torque ripple that occurs as a result of the interaction of back-emf and stator current harmonics, as well as cogging torque. In this paper, a method of mitigating the torque ripple is described that utilizes closed-loop feedback control. Specifically, the torque ripple produced by a machine is measured using a piezoelectric sensor. The sensor is constructed from polyvinylidene fluoride (PVDF) film, which produces a voltage in response to subtle strains in the motor housing. The sensed torque ripple provides a feedback that is used to determine stator current harmonics utilizing a controller that is based upon cost function minimization. Simulation and experimental results are used to demonstrate the effectiveness of the control technique.
Citation: Neely, J., Pekarek, S., Beccue, P., Benavides, N. et al., "Design of a Piezoelectric Sensor-Based Controller for Mitigation of Torque Ripple in a Brushless DC Machine," SAE Technical Paper 2002-01-3223, 2002, https://doi.org/10.4271/2002-01-3223. Download Citation
J. Neely, S. Pekarek, P. Beccue, N. Benavides, M. Ortbals, D. Stutts, J. Banaskavich
Department of Electrical and Computer Engineering, University of Missouri-Rolla, Department of Mechanical Engineering, University of Missouri-Rolla
Power Systems Conference
SAE 2002 Transactions Journal of Aerospace-V111-1