Current-Sensorless Method for Speed Control of Induction Motor Based on Hysteresis Pulse Width Modulation Technique

Abstract

<jats:p>This paper describes a new solution to control the induction motor drive system without current sensors based on improving the Hysteresis Pulse Width Modulation technique. It has proposed a control scheme which uses stator currents estimated from the differential equation of state variables to replace the feedback signal from current sensors applied in the hysteresis current controller. To verify the proposed method, simulations in MATLAB/Simulink have been implemented in various operating conditions of the motor where its speed has been changed under load as well as no load conditions. The simulation results have demonstrated the effectiveness of the proposed control method for inductive motor drives. 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.</jats:p>

An Improved Current-Sensorless Method for Induction Motor Drives Applying Hysteresis Current Controller

“…The number of differential equations required for this method is two; it is less than the  ISSN: 2089-3272 IJEEI, Vol.9, No. 1, March 2021: 130 -140 134 four differential equations of the current estimation method, which is presented in [14]. Thus, it is possible to reduce the complexity of the current estimation algorithm to facilitate the control aspect of the IMD.…”

“…However, the slow response to reach reference speed is a disadvantage of this method. The paper [14] proposes a current sensorless technique for controlling IM drives. The estimated stator currents are calculated directly from the differential equations of stator and rotor current.…”