Speed Control Using an Integral Sliding Mode Controller for a Three-Phase Induction Motor

Abstract

Induction motors are widely used in commercial and industrial applications due to their robustness, high efficiency, low maintenance requirements and durability among other reasons. Consequently, their speed should be controlled for better performance. This paper describes utilization of a scalar speed control of a three-phase squirrel cage induction motor (SCIM) to control a motor’s speed using an integral sliding mode controller (ISMC). The controller was tested under various operating conditions. The results are compared with a case employing a conventional PI controller. It was found that speed control by ISMC has a 0.16 RPM steady-state error, 0.03 s to reach steady-state from a standstill, and a 5% overshoot. All of these are lower values as compared to the results of a conventional PI controller. In this paper, the robustness of each controller to uncertainties is checked. Simulation results show the advantages of ISMC control methods. The system is simulated using MATLAB SIMULINK R2017a.

Input-Output Linearization Control Based on the Sliding Mode of the Squirrel Cage Motor

“…The motor speed 𝛺 should track a specific reference speed Ω 4IL in the presence of load torque [9][10][11]. The system is controlled so that the error 𝑒(𝑡) = Ω 4IL − Ω and its rate of change always moves towards a sliding surface.…”

“…The design of a sliding mode controller has two steps: the definition of the adequate switching surface and the development of the control law (equivalent command and discontinuous command). The sliding mode control can offer good properties, such as insensitivity to parameter variations [9][10][11].…”

Sliding Input Output Control of Squirrel Cage Motor Based NPC Five Level Inverter

“…Due to the significant influence of nonlinearities on squirrel cage motor system dynamics, linear control techniques are quite good, and they may not meet the system specifications, mainly in the case of variable speed applications. Among these nonlinear techniques that ensure high performance and global decoupling between the outputs to control whatever the path profile imposed for the machine, one can mention the input-output linearization technique and the other is sliding mode technique [3][4][5][6][7][8].…”

“…The input-output linearization control is an analytical design approach which aims to reduce the original nonlinear problem to a simpler linear control problem. The nonlinear control system is designed using a two-step procedure [3,4].…”