Sensorless Modeling of Varying Pulse Width Modulator Resolutions in Three-Phase Induction Motors

PLoS One. 2017 Jan 11;12(1):e0168149. doi: 10.1371/journal.pone.0168149. eCollection 2017.


A sensorless algorithm was developed to predict rotor speeds in an electric three-phase induction motor. This sensorless model requires a measurement of the stator currents and voltages, and the rotor speed is predicted accurately without any mechanical measurement of the rotor speed. A model of an electric vehicle undergoing acceleration was built, and the sensorless prediction of the simulation rotor speed was determined to be robust even in the presence of fluctuating motor parameters and significant sensor errors. Studies were conducted for varying pulse width modulator resolutions, and the sensorless model was accurate for all resolutions of sinusoidal voltage functions.

MeSH terms

  • Automobiles*
  • Electricity*
  • Models, Theoretical*

Grants and funding

This effort is funded by the In-house Laboratory Independent Research (ILIR) project “Sensorless Failover Design in High Criticality / High Performance Applications.” The funder had no role in study design, data collection and analysis, or preparation of the manuscript.