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@PHDTHESIS{Schubert:751451,
      author       = {Schubert, Michael},
      othercontributors = {de Doncker, Rik W. and Mertens, Axel},
      title        = {{H}igh-precision torque control of inverter-fed induction
                      machines with instantaneous phase voltage sensing},
      volume       = {118},
      school       = {Rheinisch-Westfälische Technische Hochschule Aachen},
      type         = {Dissertation},
      address      = {Aachen},
      publisher    = {Institut für Stromrichtertechnik und Elektrische Antriebe
                      (ISEA)},
      reportid     = {RWTH-2018-231364},
      series       = {Aachener Beiträge des ISEA},
      pages        = {1 Online-Ressource (x, 221 Seiten) : Illustrationen},
      year         = {2018},
      note         = {Veröffentlicht auf dem Publikationsserver der RWTH Aachen
                      University 2019; Dissertation, Rheinisch-Westfälische
                      Technische Hochschule Aachen, 2018},
      abstract     = {Model inaccuracies, parameter variations and parasitic
                      influences of the voltage source inverter can cause
                      significant torque error and detuning in field-oriented
                      induction machine drives. This thesis describes an
                      analytical minimization approach for the sensitivity of
                      flux-linkage observers to parameter variations, measurement
                      feedback deviation and higher-order harmonics. An extended
                      model of the induction machine, which takes into account
                      magnetic saturation, iron losses, rotor deep-bar effect, and
                      temperature drift of the rotor and stator resistances is
                      introduced. Based on an analytical sensitivity analysis, the
                      flux-linkage observer is designed with respect to minimal
                      sensitivity to uncertain parameters. The low-speed accuracy
                      is improved by an instantaneous phase voltage sensing
                      circuit integrated with the bottom gate driver of each
                      inverter leg. The method is based on oversampling and
                      digital integration. A high-bandwidth low-pass filter is
                      introduced and optimized to minimize the instantaneous
                      measuring error. A novel sensor-offset compensation method
                      is developed, which allows independent offset calibration
                      for all phase voltage and current sensors during operation.
                      The method is fully decoupled from the control algorithm.
                      Another important aspect is the dynamics of
                      efficiency-enhanced IM drives. A model-predictive approach
                      for optimal dynamic current sharing of the flux-producing
                      and torque-producing current is proposed. The results are
                      transferred into a lookup table for implementation on a
                      low-cost microcontroller.},
      cin          = {614510 / 614500},
      ddc          = {621.3},
      cid          = {$I:(DE-82)614510_20140620$ / $I:(DE-82)614500_20201203$},
      typ          = {PUB:(DE-HGF)11 / PUB:(DE-HGF)3},
      doi          = {10.18154/RWTH-2018-231364},
      url          = {https://publications.rwth-aachen.de/record/751451},
}