Resource optimal FPGA implementation of a Least-Squares-Estimator for fast and robust online measurement of current slope and absolute value

  • Author:

    Andreas Liske, Simon Decker, Michael Braun

  • Source:

    2019 21st European Conference on Power Electronics and Applications (EPE '19 ECCE Europe),

    DOI: 10.23919/EPE.2019.8915548

  • Date: 03.09.2019
  • This paper presents an improved Least-Squares-Estimator for the fast, non-recursive online measurement of the first derivative and absolute value of a piecewise linear oversampled current signal. Core topic is the partially online calculation of the pseudoinverse matrix in combination with an optimized small lookup table, minimizing memory requirements significantly.