A novel current-injected sensorless control scheme for squirrel-cage induction motors

Shiu Yung Lin*, Ying-Yu Tzou

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review

Abstract

This paper presents a novel sensorless control scheme of squirrel-cage induction motors by using a PWM waveform injection technique for the estimation of rotor dependent stator leakage inductances. To increase the signal-to-noise ratio when operating in low-speed region, the magnitude of the injected signal is adaptively adjusted according to motor operating condition. Practical realization issues of the detection of the reflected signals and estimation of the rotor position have been addressed. The developed sensorless control scheme has been implemented by using a high-performance single-chip DSP controller. Experimental verification of the developed adaptive injection scheme and rotor position estimation scheme has been carried out. Experimental results show the proposed sensorless position control scheme can reach a position control resolution of 0.05 rad with a rated holding torque.

Original languageEnglish
Pages (from-to)991-996
Number of pages6
JournalPESC Record - IEEE Annual Power Electronics Specialists Conference
Volume2
DOIs
StatePublished - 1 Jan 2002
Event2002 IEEE 33rd Annual Power Electronics Specialists Conference (PESC) - Cairns, Australia
Duration: 23 Jun 200227 Jun 2002

Keywords

  • Adaptive flux estimation
  • Current-injected leakage inductance estimation
  • DSP motor control
  • Induction motor
  • Sensorless position control

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