Speed and Current Sensor Fault-Tolerant-Control of the Induction Motor Drive

This paper introduces a new solution for the speed and current sensor fault-tolerant direct field-oriented control of induction motor drives. Two self-adjusting observers derived from a modified current-based model reference adaptive system (CB-MRAS) are presented. Finally, the recursive least squares method was used to estimate the parameters of the used observers. The method, in the proposed solution, provides a very fast and accurate finding of the observer parameters while maintaining relative simplicity and ease of implementation. The presented algorithm eliminates the CB-MRAS observer dependence on the induction motor parameters and also compensates for the inaccuracies in the evaluation of the stator voltage vector. The proposed fault-tolerant control offers the drive operation while either a speed sensor or one/two current sensors fault occurs. The drive still works with the direct field-oriented control even when no current sensors are healthy. The proposed scheme was simulated in the MATLAB/Simulink software environment. Then the algorithm was implemented in a floating-point digital signal controller (DSC) TMS320F28335 and tested on an induction motor drive prototype of rated power of 2.2 kW to validate the proposed schemes.

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Sensor Fault-Tolerant Control of an Induction Motor Drive System

IFAC Proceedings Volumes ◽

10.1016/s1474-6670(17)39357-6 ◽

2000 ◽

Vol 33 (25) ◽

pp. 307-312

Author(s):

R.J. Patton ◽

C.J. Lopez-Toribio

Keyword(s):

Induction Motor ◽

Fault Tolerant ◽

Fault Tolerant Control ◽

Drive System ◽

Motor Drive ◽

Induction Motor Drive ◽

Sensor Fault ◽

Motor Drive System

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An Enhanced Fault Tolerant Control Against Current Sensor Failures in Induction Motor Drive by Applying Space Vector

Journal of Advanced Engineering and Computation ◽

10.25073/jaec.202041.269 ◽

2020 ◽

Vol 4 (1) ◽

pp. 51

Author(s):

Cuong Dinh Tran ◽

Pavel Brandstetter ◽

Minh Huu Chau Nguyen ◽

Sang Dang Ho ◽

Phuong Nhat Pham ◽

...

Keyword(s):

Induction Motor ◽

Fault Tolerant ◽

Fault Tolerant Control ◽

Current Sensor ◽

Motor Drive ◽

Induction Motor Drive ◽

Sensor Failure ◽

Space Vector ◽

Measured Current ◽

A Current

In this paper, an enhanced active fault-tolerant control (FTC) is proposed to solve a current sensor failure in the induction motor drive (IMD) using two current sensors. The proposed FTC method applies only one observer to diagnose the faults and reconfigure the control signals by the space stator current. The diagnosis function is made up of a comparison algorithm between the measured current space vector and the estimated space vector. Then, incorrect feedback stator currents are replaced by the estimated values in the reconfiguration function. The amplitude of a healthy measured current is applied to adjusted the accuracy of estimated current signals. The IMD uses the field-oriented control (FOC) technique to control the speed and torque. The effectiveness in stabilizing the IMD system when a current sensor error occurs is verified by various simulations in the Matlab-Simulink environment This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium provided the original work is properly cited.

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