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Real-Time Analysis of a Nonlinear State Observer with Improved Disturbance Compensation for Sensorless Induction Motor

  • S. Mohan Krishna
  • J. L. Febin Daya
  • C. Kamal Basha
Conference paper
Part of the Advances in Intelligent Systems and Computing book series (AISC, volume 695)

Abstract

This paper presents a comparison and real-time analysis of sliding mode disturbance observers for speed sensorless induction motor drives. The rotor speed tracking bandwidth and the load rejection capability are improved by altering the profile of the sliding hyperplane used in the state observer. The entire system is built in Simulink environment, and real-time RT-lab blocksets are integrated into the same and tested in a new Processor-in-Loop-based test bench. The Processor-in-Loop test bench uses the OP4500 real-time target and loop back adapters for signal routing. This ensures that there is a real-world signal transfer between the plant and the controller.

Keywords

Sensorless State estimation Adaptive control Model-based design Processor-in-loop (PIL) RT-lab 

Nomenclature

\( {\text{i}}_{\text{ds}}^{\text{s}} ,{\text{i}}_{\text{qs}}^{\text{s}} ,{\text{i}}_{\text{dr}}^{\text{r}} ,{\text{i}}_{\text{qr}}^{\text{r}} ,{\text{i}}_{\text{as}}^{\text{ * }} , {\text{i}}_{\text{bs}}^{\text{ * }} , {\text{i}}_{\text{cs}}^{\text{ * }} \)

D-, q-, and three-phase reference current components

\( {\text{v}}_{\text{ds}}^{\text{s}} ,{\text{v}}_{\text{qs}}^{\text{s}}\)

D- and q-axis stator voltage components

Tr,Rs, Rr

Rotor time constant, stator, and rotor resistance

Σ,Lr, Lm, Ls

Leakage reactance, rotor, magnetizing, and stator self-inductance

Lls,Llr,

Stator and rotor leakage inductances

\({{\uppsi}}_{\text{ds}}^{\text{s}} ,{{\uppsi}}_{\text{qs}}^{\text{s}}, {{\uppsi}}_{\text{dr}}^{\text{s}}, {{\uppsi}}_{\text{qr}}^{\text{s}}\)

D-axis and q-axis flux linkages

\( \uptheta_{\text{f}} ,\uptheta_{\text{sl}} ,\uptheta_{\text{r}} \)\( {\text{T}}_{\text{e}}^{ *} \)

Field, slip, and rotor angle, reference electromagnetic torque

References

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Copyright information

© Springer Nature Singapore Pte Ltd. 2018

Authors and Affiliations

  • S. Mohan Krishna
    • 1
  • J. L. Febin Daya
    • 2
  • C. Kamal Basha
    • 1
  1. 1.Department of Electrical and Electronics EngineeringMITS (Madanapalle Institute of Technology and Science)MadanapalleIndia
  2. 2.School of Electrical EngineeringVIT UniversityChennaiIndia

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