Sensorless position control of induction motors-an emerging technology

  title={Sensorless position control of induction motors-an emerging technology},
  author={Joachim Holtz},
  journal={IEEE Trans. Industrial Electronics},
Concepts for sensorless position control of induction motor drives rely on anisotropic properties of the machine rotor. The built-in spatial anisotropy is detected by injecting a high-frequency flux wave into the stator. The resulting stator current harmonics contain frequency components that depend on the rotor position. Models of the rotor saliency serve to extract the rotor position signal using phase-locked loop techniques. A different approach makes use of the parasitic effects that… CONTINUE READING
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