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Aiming at the problem of induction motor (IM) parameters uncertainty, a novel L2 gain disturbance attenuation control algorithm based on Port-Controlled Hamiltonian (PCH) systems theory is presented for IM. Firstly, a PCH system model of IM is established. Secondly, using interconnection and damping assignment, the desired state error PCH structure is assigned to the closed-loop IM system by the energy-shaping...
In this paper a sensorless rotor speed estimation and parameter identification algorithm is presented. The algorithm is designed specifically for induction motor (IM) drives devoted to automatic rescue devices (ARD) used in lifts and hoist applications. Its peculiarity is that it is based on the sinusoidal steady state mathematical model of the IM and, therefore, can be implemented on a low cost micro-controller...
This paper introduces designing of a Takagi-Sugeno (T-S) fuzzy, state feedback controller so as to have optimal and robust full-range speed control over the wounded rotor induction motor. A slip energy recovery drive system, using 12-pulse converter and a shunt chopper is used as a modified system to drive a slip ring induction motor, which is coupled with a class of nonlinear uncertain load. Using...
Bucket wheel excavators, spreaders, mobile crushers, movable belt conveyors and other machines on open pit mines are huge tracked vehicles with slow speed of movement. To be able to move on mine's terrain, the machines are equipped with crawler mechanism for support and transport. Crawler chain serves for transformation of rotation of drive tumbler to linear movement of tracked vehicle. This transmission...
We have proposed a current observer-based induction motor speed sensorless vector control system which is composed in a rotating reference frame. The characteristic improvement of this system is discussed by taking into account iron loss, stator resistance identification, current low-pass filter and speed estimation low-pass filter. The stability of the system has been investigated by the trajectories...
Induction Motor (IM) speed control is an area of research that has been in prominence for some time now. In this paper, a nonlinear controller is presented for IM drives. The nonlinear controller is designed based on input-output feedback linearization control technique, combined with sliding mode control (SMC) to obtain a robust, fast and precise control of IM speed. The input-output feedback linearization...
Induction Motors have been used as the workhorse in the industry for a long time due to its easy build, high robustness, and generally satisfactory efficiency. However, they are significantly more difficult to control than DC motors. One of the problems which might cause unsuccessful attempts for designing a proper controller would be the time varying nature of parameters and variables which might...
The application of the intelligent soft starter to the pump load can achieve the function of the soft start, the soft stop and the speed control according to the characteristics of the pump load, the purpose is that it can effectively reduce the vibration, extend the equipment life and save the energy.
This paper describes a new flux observer with voltage error compensation for sensorless AC motor drives. Incorporated with conventional open loop sensorless drive, the proposed observer gives good performance on the speed control like closed loop sensorless drive. Furthermore, the proposed drive system shows robust feature concerned with parameter variation from set-values without direct parameter...
This paper presents application of adaptive neuro-fuzzy inference system (ANFIS) into a squirrel cage induction machine towards modeling, control and estimation. This paper contributes (i) Development of a simple and more realistic model of the induction motor using ANFIS. Using ANFIS, the parameter sets of the motor model are estimated. The simplified model contains eleven estimated parameters. In...
This paper presents the experimental implementation and performance evaluation of a nonlinear controller based speed control of an induction motor (IM) drive. Neglecting the iron loss in an induction motor model causes performance deterioration. In this work, an adaptive backstepping based nonlinear controller incorporating the iron loss in IM model is developed under the parameter uncertainties....
The paper presents a new method for load equalization of high power wound rotor induction motors driving the drums of belt conveyors. During exploitation, the diameters of the drums become unequal, due to the abrasion of rubber layer or sticking of dirt, leading to unequal load distribution between motors. The proposed solution of this problem implies the application of the ldquorotor resistor converterrdquo...
This paper presents the real-time performance evaluation of a nonlinear controller for speed control of an induction motor (IM) drive. Neglecting the iron loss in an induction motor model causes performance deterioration. In this work, an adaptive backstepping based nonlinear controller incorporating the iron loss is developed under the parameter uncertainties. The adaptive backstepping technique...
Considering mandatory synchronization and torque coupling among motors with fixed joint, taking into account the influences of manufacturing errors, outside interference and electrical parameters drift on the inductive motor properties, this paper presents a novel multi-motor power balance control approach based on multi-DTC and online parameter identification. Speed control with torque balance of...
Induction motors are widely used in industry due to the fact that they are relatively cheap, rugged and maintenance free. As a consequence, much attention has been given to the motor torque and speed control. The control schemes available today require information regarding speed of the motor, which can either be obtained by using speed sensors or without speed sensors. Speed sensors have several...
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