Sensorless acquisition of the rotor position angle of induction motors with arbitrary stator windings

  title={Sensorless acquisition of the rotor position angle of induction motors with arbitrary stator windings},
  author={Joachim Holtz and Jorge Juliet},
  journal={IEEE Transactions on Industry Applications},
The anisotropy of a cage rotor is utilized to determine the angular position of the rotor in an induction machine. The switching transients generated by a pulsewidth-controlled inverter serve as test signals. The response of the three-inverter terminal currents is exploited to derive a quasi-instantaneous rotor position signal. The position is sensed at the inverter through the three-phase motor cable by measuring the current derivatives. The method does not require additional wire connections… CONTINUE READING
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