Smc And Pi Disturbance Compensation Techniques By Using Nonlinear Speed Control For Pmsm System

Fig.3. shows algorithm for the proposed method. This algorithm uses voltage and current of the PV module. A permitted error of 0.06 as shown in (8) is used in modified algorithm to eliminate the steady state oscillation in the system. The permitted error is written as  I + V dI/dV   0.06 Using the permitted error of 0.06, the steady state error is approximately 0.7% based on the duty cycle step size of 0.005.

Functional verification was performed on combined circuit of the selected components for open loop network both in NI MULTISIM and on NI ELVIS. PWM based feedback network was successfully designed tested and implemented both in NI MULTISIM and in Hardware using NI ELVIS Suite. The Design and implementation of desired SMPS circuit was successfully completed. Controllable output power analysis of SMPS using PWM technique for DC appliances Sigma,

The main aim if this report is the investigation of a permanent magnet AC generator. It is required to construct the generator in COMSOL Multiphysics and understand the generator’s working. The report will also give an understanding of the working of a permanent magnet rotor that generates an induced EMF in stator winding and how it generates voltage during rotation.

In this paper we want to operate the dc motor by electronic lock based by using pic microcontroller (PIC16K877A) Microcontroller. The speed of the Dc motor is controlled by PIC microcontroller. Authorized persons are allowed to lock and unlock the system. Giving protection to the DC motor by setting password .For each password we can vary the speed. DC Motors can be used in various applications and can be used as various sizes and rates as per our applications. In this project we have control the actual speed of dc motor as per ours requirement. The modelling and simulation of this project is done through MP-LAB software.

Abstract—Different converter topologies have been introduced for high power applications in recent years. This paper shows Permanent Magnet Synchronous Motor in Hybrid electrical vehicle is proposed by an interface of boost converter, interleaved converter and inverter as an integrated circuit. An inverter/converter circuit is designed in such a way so as to operate or control the HEV during different modes of operation. The integrated circuit in HEV will operate as a boost converter or interleaved converter depending on the load condition. The proposed integrated circuit will reduce the current ripple and voltage ripple hence it will leads to reduction in switching, conduction losses, and thermal stress on the motor. The effectiveness of proposed integrated circuit is simulated in MATLAB/ Simulink. The simulation shows that the integrated circuit have a high efficiency and can be used at high power application.

Abstract—This paper proposes direct torque control of induction motor simulation using conventional method and space vector pulse width modulation technique for ripple reduction. Direct Torque Control is a control technique used in AC drive systems to obtain high performance torque control and thereby controlling the speed of induction motor. The principle is based on simultaneous decoupling of stator flux and electromagnetic torque of AC drive system. DTC drives use hysteresis comparators and they suffer from high torque ripple and variable switching frequency problem. The proposed SVM based DTC reduces torque ripples. The basis of the SVM-DTC methodology is the calculation of the required voltage space vector to compensate the flux and torque errors and its generation using the SVM at each sample period. The performance of this method is demonstrated by simulation using MATLAB/Simulink software. Simulation results presented in this paper show the torque, flux linkage and stator current ripple decreases with the proposed SVM-DTC algorithm.

This thesis deals with the configuration and investigation of control framework structures for electric drives furnished with changeless magnet synchronous machines (PMSM) in car application. With the expanding prominence of multi-level inverters, the opportunity to get better of the execution of voltage source inverters has persistently been tried for different applications. The fast improvement of high exchanging recurrence power gadgets in the previous decade leads towards more extensive use of voltage source inverters in AC power era. In this way, this prompts the requirement for a regulation method with less aggregate symphonious bending, less exchanging misfortunes, and more extensive direct balance range. The present theory highlights the examination of the customary two-level inverter and the three-level diode cinched inverters for the application in car industry.

Nowadays, because of the fast evolution of electronic device, The recent developments in permanent magnet materials, solid state devices and microelectronic have led to the appearance of a new energy efficient drives using permanent magnet brushless direct current motors (PMBLDCM).

This paper presents a simulation for the sensorless operation of a BLDC motor drive with the estimation of initial rotor position at standstill. The system determines the actual rotor position of the motor at standstill and provides appropriate starting pulses to inverter switches to turn on. Once the motor starts to rotate, it then directly extracts the back EMF from the motor terminals between the floating phase and the midpoint of DC link. Inductance variation sensing method is used for estimating the initial rotor position of the motor followed by a sensorless operation by back EMF sensing method. The principle behind the rotor position estimation is detection and comparison of phase voltage and dc link current responses and relating it with stator inductances.

This thesis deals with the design and analysis of control system structures for electric drives equipped with permanent magnet synchronous machines (PMSM) in automotive application.With the increasing popularity of multi-level inverters, the room for improvement of the performance of voltage source inverters has continuously been tested for various applications. The rapid development of high switching frequency power electronics in the past decade leads towards wider application of voltage source inverters in AC power generation. Therefore, this prompts the need for a modulation technique with less total harmonic distortion, fewer switching losses, and wider linear modulation range.The present thesis highlights the comparison of the conventional two-level inverter and the three-level diode clamped inverters for the application in automotive industry.

The controller for the SSSC can be isolated, generally, into two main controllers, namely internal and external controllers. The main function of the internal controller is to give the control signal to drive the gate pattern generator of the power converter keeping in mind to generate a fundamental output voltage waveform with the desired magnitude and phase angle in synchronism with the ac power system. The function of the external controller, if exists, is to alter the reference signals which decides the practical operation of the SSSC so as to accomplish the desired system performance. The block diagram of the SSSC controller is represented in Figure 3.13.

Abstract: - SEDC motors are used extensively in industrial variable speed applications because of most demanding speed-torque characteristics and are simple in controlling aspects. This paper presents an implementation of internal model control (IMC) for speed control of separately excited SEDC motor based on LabVIEW. A mathematical model of the process has been developed using real plant data and then conventional controller has been designed. A comparative analysis of performance evaluation of controller has been done.

MEMS vibratory device requires actuation mechanism for moving the mass structure. Up till now wide range of actuation mechanism were proposed, which includes capacitive, piezoelectric, magnetic. Selection of actuation mechanism totally depends on the ease of application, integration complexity and ability to compact with manufacturing process. After all the choice of mechanism depends on user specified performance and characteristics of the design.

The stability of an interconnected power system is the ability of the system to return to its normal or stable condition after having been subjected to some form of disturbance. With the interconnected systems continually increasing in size and extending over whole geographical regions, it is becoming increasingly more difficult to maintain synchronism between various parts of the power system. This paper work presents an advanced adaptive Particle swarm optimization technique to optimize the SVC controller parameters for enhancement of the steady state stability & overcoming the premature convergence & stagnation problems as in basic PSO algorithm & Particle swarm optimization with shrinkage factor & inertia weight approach (PSO-SFIWA). In this paper SMIB system along with PID damped SVC controller is considered for study. The generator speed deviation is used as an auxiliary signal to SVC, to generate the desired damping. This controller improves the dynamic performance of power system by reducing the steady-state error. The controller parameters are optimized using basic PSO, PSO-SFIWA & Advanced Adaptive PSO. Computational results show that Advanced Adaptive based SVC controller is able to find better quality solution as compare to conventional PSO & PSO-SFIWA Techniques.

The control of active power and frequency in a power system is referred to as load frequency control (LFC). Stable operation of interconnected power system requires both constant frequency and constant tile-line power exchange [1]. An area control error (ACE), defined as a linear combination of tie line power and frequency deviations, is taken as the controlled output of LFC. LFC regulates ACE to zero such that frequency and tie-line power errors are forced to zeros. PID controller is widely used in LFC due to its simplicity but is gives long settling time and produces large frequency deviation [2]. In recent years, active disturbance rejection control (ADRC) developed by J. Han [3] and modified by Z. Gao [4, 5] has been proposed for the LFC controller [6-9].