Compensation of permanent magnet motors torque ripple by means of current supply waveshapes control determined by finite element method

Stéphane Clenet (1) , Yvan Lefèvre (1) , Nelson Sadowski (1) , Stéphan Astier (1) , Michel Lajoie-Mazenc (1)

1 LEEI - Laboratoire électrotechnique et électronique industrielle

A method to determine the supply current waveshapes for torque ripple compensation in permanent magnet motors without saliency and damping bars, by means of a finite element code, is presented. First, a theoretical analysis shows that current waveshapes producing constant torque can be determined. This analysis leads us to an expression for the current as a function of the motor emf and cogging torque. Several methods, based on finite element computation of the magnetic field, for computing the cogging torque and emf are proposed and compared. A special experimental bench for motor torque measurement is used to validate the theoretical results.

Mots clés: Permanent magnet motor; Torque ripples; Finite element method

Domaines: Electronique

Stéphane Clenet, Yvan Lefèvre, Nelson Sadowski, Stéphan Astier, Michel Lajoie-Mazenc. Compensation of permanent magnet motors torque ripple by means of current supply waveshapes control determined by finite element method. IEEE Transactions on Magnetics, 1993, vol. 29 (n° 2), pp. 2019-2023. ⟨10.1109/20.250806⟩. ⟨hal-01714053⟩