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This paper deals with the modelling, simulation and implementation of a Fuzzy logic controlled Cuk converter-Inverter fed Induction motor drive. This work proposes PV fed Cuk converter to produce required DC voltage at the input of inverter. The output of the Photo Voltaic (PV) system is boosted using a Cuk converter. The output of the Cuk converter is inverted and applied to a three phase induction...
The rotor speed estimation problem in electrical drives, based on shaft encoder measurements, has been dealt with by means of a digital approximate differentiator. The proposed differentiator is based on a digital VSC which is able to perform real 2-sliding modes, so that the observer discontinuous control is confined to the second total derivative of the available encoder signal estimate, and its...
The paper presents two case studies in order to illustrate an efficient usage of energy in paper industry and to point out the benefits gained. Two different approaches for obtaining higher energy efficiency of the paper production process show that energy efficiency in paper industry must be considered as a multidisciplinary field. Differences in realization of paper machine systems for control and...
The interest of Direct Torque Control (DTC) methods in conventional three-phase induction motor drives has been stated by the scientific community and the industry in the very recent decades. Multiphase electric drives have also been recently proposed for applications where the highest overall system reliability and power distribution per phase are required, being transportation systems one of these...
This paper presents the speed control scheme of indirect vector controlled induction motor (EVI) drive. Voltage source inverter type space vector pulse width modulation (SVPWM) is used for PWM controlling scheme. An intelligent based on Fuzzy PI controller is developed for controlling the torque component Iq current of an EVI. The complete vector control scheme of the IM drive incorporating the FLC...
This paper presents a feedback linearization control scheme with sliding mode controller (SMC) for enhancing performance of the induction motor drive. The feedback decoupling controller is designed in a stationary (α-β) reference frame with rotor flux and stator current components as state variables. Since the induction motor drive system is sensitive to parameter variation and load disturbances,...
A sensorless induction motor drive, with decoupled control of electromagnetic torque and of stator flux, has been developed. The performance of the proposed speed estimator has been deeply investigated through both simulation and experimental analyses, in an extended speed range, from near standstill to the field weakening region. Several experimental results, which have been obtained developing a...
The aim of this paper is to present a new fuzzy control scheme for real time drive efficiency improvement by the adaptive flux reduction at light loads during steady states and by the optimum flux recovery during transient states. The optimum flux recovery instead of the rated flux does not sacrifice the drive dynamic response since the torque capacity remains the same and accelerates the search convergence...
This document proposes an energetic output improvement of electric drives for induction motors. This modification pointing toward a better energetic output (improving the efficiency) according to the application, and can be made in the most common control algorithms as the FOC (Flux Oriented Control) and the DTC (Direct Torque Control). The increase in drive's efficiency supposes on the one hand,...
This paper presents a new control chip design, based on Field Programmable Gate Array (FPGA) technology, for multi-motor electric vehicles. The control chip builds around a reusable intellectual property (IP) core, named Propulsion Control System (PCS); which features motor control functions with field orientation methods, and energy loss minimization of induction motors. To reduce the cost, implementation...
Direct Torque Control of induction machines is known to offer fast instantaneous torque and flux control with a simple control structure. However, this scheme has two major disadvantageous namely variable inverter switching frequency and high torque ripple. These problems occur due to the use of hysteresis comparators in the conventional DTC scheme, particularly in controlling the output torque. This...
During the past two decades, drive and control system of belt conveyors on open pit lignite mines have seen significant advances. The main demand for new construction of belt conveyors was the increase of reliability, unit capacity, minimization of personal, reduction of maintenance cost, increase of safety, reduction of consumed energy, etc. The paper presents detailed mathematical model of the belt...
A nonlinear speed controller for doubly-fed induction motor (DFIM) was designed to counter the effects of the coupling between the electromagnetic torque and the flux. The controller was composed of sliding mode approach, backstepping control, and RBF network approach. The backstepping control was used to implement the precision control. The proposed strategy used RBF network to realize the self-adjusting...
This paper presents a direct torque control with space vector modulation method for matrix converter drives. It is possible to combine the advantages of matrix converter with the advantages of the DTC strategy by using space vector modulation algorithm of matrix converter and direct torque control strategy of induction motor. The proposed control system has been validated through simulations with...
In this paper, a modern intelligent control based on computational model of mammalian limbic system and emotional processes (BELBIC) is presented for speed and flux control of induction motor simultaneously. In this work, a novel and simple model of induction motor drives control plant is achieved by using the intelligent control system, which controls motor speed and flux accurately, without needing...
This paper proposes a fuzzy sliding-mode speed controller for high performance IM drive application. The sliding-mode speed controller of asynchronous induction motors is discussed firstly. Then, the fuzzy control is used for optimizing the switching on the sliding surface. Finally, the robust performance of the speed controller is validated with simulations and experiments.
In this paper, an application of speed and load torque observers is presented. The aim of the observer implementation is to be used in the diagnostic system for a motor speed sensor and a torque transmission system. The diagnostic system is dedicated to the high-speed train propelled by an induction motor. An analysis of the observed variables allows the identification of problems in the mechanical...
The well-known direct torque control (DTC) is a very simple control method for inverter-fed AC drives, which characterized by fast dynamic response, structural simplicity, and low sensitivity to parameter changes. Attempts to combine DTC with SVM have led to new ways. This paper presents a new robust DTC-SVM for high performance induction machine drives. Simulation studies have been carried out for...
The design of the position-tracking control system for induction machine drive is presented. The system consists of direct-axis current PI (proportional-plus-integral) regulator, quadrature-axis current PI regulator, a position loop feedback PD (proportional-plus-derivative) controller and a disturbance observer (DOB). The stability conditions of the position control system with DOB for induction...
A new approach to the structural synthesis of field-oriented vector control algorithms for induction motor electric drives has been developed. This approach allows combining energy efficient control with the speed of response sufficient for industrial electric drives. The basic control algorithms and simulation results are presented.
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