Abstract
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.
Highlights
The induction motors (IM) are the most popular machine applied in industrial applications due to their simple and rugged constructions, high reliability, low cost with various applications
The disadvantage of Field Oriented Control (FOC) strategy is that the control method with the mathematical model of IM has more complex than the scalar control methods
The stator current estimation method from the voltage and the rotor speed signals is applied to detect the current sensor fault in the fault-tolerant control technique of IM drive systems [11]
Summary
The induction motors (IM) are the most popular machine applied in industrial applications due to their simple and rugged constructions, high reliability, low cost with various applications. A current sensorless speed controller based on a stator voltage scalar and a feedback signal of the speed sensor has been presented in [10] The advantage of this method was simpler and faster than the FOC method, the speed responses were still disturbed in the torque control of the IM drives. The stator current estimation method from the voltage and the rotor speed signals is applied to detect the current sensor fault in the fault-tolerant control technique of IM drive systems [11]. The Field Oriented Control Technique base on hysteresis current controller hysteresis space vector pulse width modulation (HSVPWM) method is proposed to control the rotor speed of IM drive This method is a combination between HPWM and SVPWM to control the switching on the inverter. The dyncaumrircenmtosdeenl soofrasn. induction motor in the α-β coordinate system can be de uα uβ
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