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With distinct advantages over three-phase machines, multiphase machines are gaining increasing popularity in ship electric propulsion applications. Many fault-tolerant control strategies have been proposed for multiphase drive to suppress the torque ripples under faulty conditions; however, most of them depend heavily on the mathematical models and the need of the prefault to postfault transitions,...
Electric vehicle technology is becoming increasingly important as it takes care of the environmental issues related to ICE vehicle and reduces the dependency on oil. Electric vehicle being greatly dependent on the limited electrical energy provided by a battery, the power flow efficiency is very important in this context. The major contribution of this work is to propose a power management strategy...
Pitch angle control system is one of the most diversified and popularly used control techniques to regulate the output power and speed of a wind turbine, when wind speed is above the rated speed. Usually PI controller is used for pitch angle control. But in this paper Proportional-Integral-Derivative (PID) and Fuzzy Logic Control (FLC) methods are used. As our system contains strong non-linearity,...
This paper compares between different techniques of self-tuning FOPID control for Brushless DC motor. The aim from this comparison discovering the sensitive FOPID controller parameters, which will give better performance when it will be tuned online. The FOPID control contains five parameters, the fuzzy logic control will be used to tune the FOPID controller parameters through different techniques...
Switched Reluctance Motor (SRM) is increasing prominence due to its simple and rugged construction, absence of winding on its rotor, low manufacturing cost, high power density, fault tolerant capability. These advantages with SRM are overshadowed by the existence of torque ripple, noise vibration, requirement of rotor position information, complex control due to the nonlinear characteristics. This...
Over the past years many kind of control techniques are proposed for induction motor drives. Among them DTC has gained more importance due to fast dynamic response and simple control structures. However it has disadvantage of high ripples in torque and slow response because of hysteresis controllers in torque and flux loop at low speed. To improve the performance of DTC (Direct Torque Control) and...
Conventional PI controller has overshoot effect at the transient period of the speed response curve. Most of the controllers of Induction Motor (IM) for industrial applications have been designed based on PI controller without consideration of core loss (CL) and stray load loss (SLL). In order to obtain the precise performance of torque as well as speed and flux, the mentioned losses should be considered...
Tremor is a common disorder in human which affects various joints of body including elbow joint. Application of functional electrical stimulation (FES) to attenuate and suppress tremor in patients with movement disorders and diseases have been investigated in different research. In this paper, a method based on Adaptive neuro-fuzzy inference system (ANFIS) has been implemented to control pathological...
In this paper, a model reference adaptive system (MRAS) speed estimator for speed sensorless indirect field oriented control (IFOC) of an induction motor drive (IMD) using fuzzy logic controller (FLC) is implemented to replace the conventional constant gain proportional-integral-controller (PIC). Firstly, the MRAS speed sensor for IFOC of an IMD is implemented using PIC. The PIC offers satisfactory...
This paper investigates fuzzy adaptive control of induction machine (IM) speed. The proposed controller consists of two parts: the first is classical fuzzy logic controller (FLC) constituted by fuzzy If-Then rules. The second part is adaptation mechanism, which adjusts the fuzzy controller parameters in order to minimize the error between the reference speed and the machine speed. The fuzzy adaptive...
Wind energy features prominently as a supplementary energy booster since the wind speed varies. Evaluation of control schemes for electrical generator is hard with wind turbine. For similar environment of turbine, a wind turbine emulator (WTE) is used. The purpose of systems is to maximize energy efficiency, and extract maximum power from the wind speed. In This case, the MPPT control becomes important...
Simple structure, quick, and robust response of direct torque control (DTC) make it attractive in ac drives. However, in sensorless applications, precise estimation of rotor speed is a crucial issue as well as the torque and flux estimation. In this paper an adaptive flux observer is introduced with stator current and flux vector components as state variables and rotor speed as an unknown parameter...
The paper presents a fuzzy logic speed control system based on fuzzy logic approach for an indirect vector controlled induction motor drive for high performance. The analysis, design and simulation of the fuzzy logic controller for indirect vector control induction motor are carried out based on fuzzy set theory. The proposed fuzzy controller is compared with PI controller with no load and various...
This paper presents a modified fuzzy controller for direct torque control (DTC) of induction motor capable of reducing the steady state error. The drive is also robust to load disturbance while not resorting to complicated control method. The proposed modified fuzzy logic controller (MFLC) consists of proportional-integral (PI) controller at steady state, PI-type fuzzy logic controller (PI-type FLC)...
This paper describes a fuzzy logic based smart motor controller to improve the starting performance of induction motor, and establishes the fact that optimum firing angle of the smart motor controller depends on the motor parameters. Identically rated motors with different parameter values are considered for the work. Fuzzy logic controller adjusts the firing angle of the SMC to improve the starting...
A fuzzy control scheme and adaptive neuro fuzzy inference system for torque-ripple minimization of switched reluctance machines is presented. The fuzzy parameters are initially chosen randomly and then adjusted to optimize the control. The controller produces smooth torque up to the motor base speed. The torque is generated over the maximum positive torque-producing region of a phase. This increases...
This paper presents a simple procedure for acoustic noise reduction in switched reluctance motor (SRMs) drive. The main sources of acoustic noise in a SRM are the radial magnetic force and torque ripple. Investigations of a radial force require an analytical relationship between motor designs and drive parameters. Thus, in this method two mathematical methods for calculation of radial force and torque...
This paper presents the fuzzy inference system for selecting the switch states of matrix converter using Direct Torque Control Technique to control the speed of induction motor. In this system, two fuzzy controllers are used. One fuzzy controller estimates the voltage and the other fuzzy controller is used to select the switching vector based on the voltage vector selected by the first fuzzy controller...
This paper presents a design of fuzzy logic control for 2DOF laboratory helicopter model (Humusoft CE 150) which represents a nonlinear and highly cross-coupled system. The controller is composed of two fuzzy logic controllers for azimuth and elevation controls. The main objective of the paper is to obtain robust and stable controls for wide range of azimuth and elevation angles changing during the...
This paper deals with the Direct torque control of PMBLDC motor using hybrid controller (Genetic algorithm and fuzzy logic) to reduce the torque ripple. Though the conventional controllers are commonly used in practice, they have failed to perform satisfactorily under non linear conditions and parameter variations. In the proposed work, a hybrid controller (using genetic algorithm and fuzzy logic...
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