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Related Experiment Video

Updated: Jun 2, 2025

Design and Application of a Fault Detection Method Based on Adaptive Filters and Rotational Speed Estimation for an Electro-Hydrostatic Actuator

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Published on: October 28, 2022

One-Instant Flux Observer design for Three-Phase induction motor with reduced bound active load rejection speed

Akram Hashim Hameed^1,2, Shibly A Al-Samarraie², Amjad Jaleel Humaidi²

¹Baghdad State Company of Electricity Distribution, Al-Sader Branch, Ministry of Electricity, Baghdad 10066, Iraq.

Anais Da Academia Brasileira De Ciencias

|January 15, 2025

Summary

A new fast convergent flux observer, BFISMO, improves induction motor speed control by minimizing estimation errors. This advanced observer ensures bounded errors from startup, enhancing overall system performance.

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Area of Science:

Electrical Engineering
Control Systems

Background:

Latency in flux observation negatively impacts observer-based field-oriented speed control for three-phase induction motors.
Improving the convergence rate of estimation errors is key to enhancing speed-controlled induction motor performance.

Purpose of the Study:

To design a fast convergent flux observer for induction motors.
To achieve bounded estimation error immediately after motor startup.
To enhance the performance of observer-based field-oriented speed control.

Main Methods:

Developed a novel flux observer by fusing a barrier function adaptive mechanism with integral sliding mode control (BFISMO).
Designed three controllers: a backstepping controller for flux control, and two controllers for rotor speed control (QSMDO and NLDO) combining backstepping with disturbance observers.
Conducted rigorous stability analysis to ensure global flux estimation error ultimate boundedness.

Main Results:

The proposed BFISMO provides bounded estimation error from the instant of motor startup.
Numerical simulations demonstrated the superiority of the BFISMO compared to conventional observer techniques.
The integrated controllers effectively managed flux and rotor speed, including estimation of unmatched load torque.

Conclusions:

The BFISMO significantly improves the performance and efficacy of speed-controlled induction motors.
The proposed observer addresses latency issues in flux observation, leading to faster convergence and better control.
BFISMO offers a superior alternative to conventional flux observers for induction motor applications.