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High-performance vector control without AC phase current sensors for induction motor drives: Simulation and real-time

Younes Azzoug1, Mohamed Sahraoui2, Remus Pusca3

  • 1Electrical Engineering Laboratory of Biskra (LGEB), University of Biskra, Algeria; Univ. Artois, UR 4025 LSEE F-62400, Bethune, France.

ISA Transactions
|October 11, 2020
PubMed
Summary

This study introduces a novel, low-cost sensorless control strategy for Induction Motor (IM) drives. The method enhances performance by regenerating phase-current information using a modified Luenberger observer and DC-link voltage data.

Keywords:
Currents estimationFault-tolerant controlInduction motorSensorless controlVector control

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Area of Science:

  • Electrical Engineering
  • Control Systems
  • Power Electronics

Background:

  • Induction Motor (IM) drives are crucial in industrial applications.
  • Accurate current sensing is vital for effective IM control.
  • Traditional current sensing methods increase cost and complexity.

Purpose of the Study:

  • To develop a high-performance, low-cost current sensorless control strategy for IM drives.
  • To introduce a novel phase-current regeneration method for sensorless vector control.
  • To enable current estimation using only DC-link voltage information.

Main Methods:

  • Reconfiguration of a Luenberger adaptive observer for current estimation.
  • Utilizing DC-link voltage sensor information.
  • Theoretical analysis of the modified adaptive observer and control strategy.

Main Results:

  • Successful implementation of a current sensorless vector control strategy.
  • Validation through extensive simulation and experimental tests on a 1.1 kW IM.
  • Demonstration of the strategy's relevance, workability, and practicability under various operating conditions.

Conclusions:

  • The proposed current sensorless vector control strategy is effective and practical for IM drives.
  • The novel phase-current regeneration method offers a cost-effective solution.
  • This approach eliminates the need for dedicated current sensors, simplifying drive systems.