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Torque Ripple Reduction for Step Motors

  • Farshad Khorrami
  • Prashanth Krishnamurthy
  • Hemant Melkote
Part of the Power Systems book series (POWSYS)

Abstract

In this chapter, we present controllers that reduce torque ripple for different types of stepper motors. The pulsating torque developed when a stepper motor is full- or half-stepped is known as the torque ripple and is the main cause of exciting resonance in the motor. This ripple can have a peak value of 20 or more times the friction torque value. Torque ripple itself is a result of several factors that are related to both the motor and the driver. Some of these factors are geometric imperfections in the motor, imprecise commutation, fidelity of current driving waveforms, phase delays, friction, and magnetic hysteresis in the motor and may be reduced (but not eliminated) either through the careful design of the motor itself or through the utilization of better controllers.

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References

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    This is guaranteed by the fact that the eigenvalues of (A — αBBT P) are in the open left half plane.Google Scholar
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    The theoretical limit is 0.5744 s assuming infinite jerk.Google Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 2003

Authors and Affiliations

  • Farshad Khorrami
    • 1
  • Prashanth Krishnamurthy
    • 1
  • Hemant Melkote
    • 1
  1. 1.Control/Robotics Research Laboratory (CRRL) Department of Electrical and Computer EngineeringPolytechnic UniversityBrooklynUSA

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