Estimation of stepping motor current from long distances through cable-length-adaptive piecewise affine virtual sensor

Authors

  • Alberto Oliveri Department of Electrical, Electronic, Telecommunications Engineering and Naval Architecture (DITEN), University of Genoa
  • Mark Butcher Department of Engineering, CERN
  • Alessandro Masi Department of Engineering, CERN
  • Marco Storace Department of Electrical, Electronic, Telecommunications Engineering and Naval Architecture (DITEN), University of Genoa

DOI:

https://doi.org/10.21014/acta_imeko.v4i3.249

Abstract

In this paper a piecewise affine virtual sensor is used for the estimation of the motor-side current of hybrid stepper motors, which actuate the LHC (Large Hadron Collider) collimators at CERN. The estimation is performed starting from measurements of the current in the driver, which is connected to the motor by a long cable (up to 720 m). The measured current is therefore affected by noise and ringing phenomena. The proposed method does not require a model of the cable, since it is only based on measured data and can be used with cables of different length. A circuit architecture suitable for FPGA implementation has been designed and the effects of fixed point representation of data are analyzed.

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Published

2015-09-27

Issue

Vol. 4 No. 3 (2015)

Section

Research Papers

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