Dynamic performance improvement of linear induction motor using DTFC method and considering end-effect phenomenon

Abstract

In this paper the control method of LIM which lead to optimal control characteristic of motor such as thrust, flux and current has been proposed. The performance of the proposed DTFC method has been analyzed with considering End-Effect. To evaluate and approve improved controlling characteristics, the results of the DTFC method have been compared with the results obtained from Indirect Vector Control (IVC). IVC is one of the conventional control methods for LIM. The obtained results from MATLAB/Simulink show that the DTFC control method with considering End-Effect in comparison with the IVC has caused increase response time of speed about 50%. Also it has led to a considerable reduction in FORCER thrust ripples amplitude about 25%. The most important feature of DTFC method is its performance robustness against the End-Effect phenomena.

Anti‐windup scheme based on 2DOF‐PIλDμcontroller for velocity tracking of linear induction motor

“…A SVPWM method is employed for the inverter controlling by providing the required switching signals to it. The SVPWM technique was modified from the PWM technique for the three‐phase inverter using representation of space vector for in the α‐β plane . The stationary α‐β reference frame is accomplished when the transformation of three‐phase voltages takes place by Clarke's transformation.…”

“…The SVPWM technique was modified from the PWM technique for the three-phase inverter using representation of space vector for in the α-β plane. 9,10 The stationary α-β reference frame is accomplished when the transformation of three-phase voltages takes place by Clarke's transformation. The main concept of SVPWM depends on the special switching sequence of the three-phase inverter.…”

“…A three‐phase inverter using SVPWM technique is exploited for controlling the LIM velocity and gets the control signal from the proposed controller based on IFOC method. SVPWM method is widely used to control the motors and inverter applications due to a good performance by minimizing the harmonic contents . The IFOC technique is used to separate and control the torque and flux variables using two current controllers and velocity controller depending on the proposed controller.…”

“…SVPWM method is widely used to control the motors and inverter applications due to a good performance by minimizing the harmonic contents. [7][8][9] The IFOC technique is used to separate and control the torque and flux variables using two current controllers and velocity controller depending on the proposed controller.…”

Second order sliding mode observer of linear induction motor

“…On this basis, the state‐space equation of LIM is presented by Pucci to reflect the mathematical model of LIM [5] accurately. Pucci's model, due to its higher accuracy than traditional LIM model, is widely used in the field of LIM control application such as field‐oriented control (FOC) [6], direct FOC [7], direct torque and flux control (DTFC) method [8], neural network control [9], input–output‐feedback linearisation control [10], combined vector and direct thrust control [11], super twisting control [12]. Unfortunately, the speed measurement is required in these controllers to achieve great control performance.…”