Minimization of torque ripple in permanent magnet motors: a closed form solution
- 2 January 2003
- conference paper
- Published by Institute of Electrical and Electronics Engineers (IEEE)
- p. 459-463 vol.1
- https://doi.org/10.1109/iecon.1992.254563
Abstract
A closed-form solution for minimizing torque pulsations or ripple in three-phase permanent magnet motors by the appropriate weighting of input current harmonics is presented. First, an analysis of torque ripple is presented by using the complex exponential Fourier series. In addition, a method to design the optimal weighting of current harmonics is developed by using constrained optimization techniques. In contrast to iterative approaches, the proposed design method determines the current harmonic weights in closed form; the procedure is especially easy to perform. Steps in the design procedure are demonstrated by a numerical example. Application of the optimal current should reduce torque-induced motor vibration and noise, as well as improve accuracy in servo applications.<>Keywords
This publication has 3 references indexed in Scilit:
- Minimization of Torque Ripple in Brushless DC Motor DrivesIEEE Transactions on Industry Applications, 1986
- Torque Production in Permanent-Magnet Synchronous Motor Drives with Rectangular Current ExcitationIEEE Transactions on Industry Applications, 1984
- Influence of motor design and feed-current waveform on torque ripple in brushless DC drivesIEE Proceedings B Electric Power Applications, 1984