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An automatic torque ripple compensation system for direct drive motors
Author(s) -
Sato Hirokazu,
Makino Tatsuo,
Matsui Nobuyuki
Publication year - 1993
Publication title -
electrical engineering in japan
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.136
H-Index - 28
eISSN - 1520-6416
pISSN - 0424-7760
DOI - 10.1002/eej.4391130614
Subject(s) - control theory (sociology) , torque ripple , direct torque control , torque motor , stall torque , torque , damping torque , rotor (electric) , torque limiter , switched reluctance motor , computer science , servomotor , engineering , control engineering , induction motor , physics , mechanical engineering , electrical engineering , control (management) , artificial intelligence , voltage , thermodynamics
A serious problem in motion control is the occurrence of torque ripple. Since a direct drive (DD) motor with a magnet rotor uses a rare‐earth magnet, the torque ripple is more serious than that of conventional servomotors. This paper presents an auto‐compensation of torque ripple using a software‐implemented torque observer. The frequency and amplitude of torque ripple can be obtained in the controller by using the estimated torque from an observer, and the autonomous generation of a compensating current component for a torque ripple is possible. The proposed algorithm has been verified by experiments.