Direct torque control, induction motor vector control without an encoder

  • Nash J
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Abstract

The basic evolution of direct torque control from other drive types is explained. Qualitative comparisons with other drives are included. The basic concepts behind direct torque control are clarified. An explanation of direct self control and the field-orientation concepts implemented in the adaptive motor model block is presented. The reliance of the control method on fast processing techniques is stressed. The theoretical foundations for the control concept are provided in summary format. Information on the ancillary control blocks outside the basic direct torque control is given. The implementation of special functions directly related to the control approach is described. Finally, performance data from an actual system are presented

Author-supplied keywords

  • DC motors
  • Frequency control
  • Induction motors
  • Machine vector control
  • Pulp and paper industry
  • Pulse width modulation
  • Sensorless control
  • Space vector pulse width modulation
  • Torque control
  • Voltage control
  • adaptive motor model block
  • ancillary control blocks
  • direct self control
  • direct torque control
  • encoderless control
  • fast processing techniques
  • field-orientation concepts
  • induction motor drives
  • induction motor vector control
  • machine control
  • machine testing
  • machine theory
  • torque control
  • variable speed drives
  • velocity control

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Authors

  • J N Nash

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