Abstract:
The field oriented control emerged as an important approach for the control of AC machines, and continues to be explored and developed in the literature. The estimation of the rotor flux from the measurable variables was the only method used to implement the vector control of the induction machine. To replace the estimator based on the mathematical model of the system, which can lead to unintended errors due to uncertainties on the model and on the measures we use an appropriate observer.

Presented By:
Ch ....etc

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microcontroller based speed control of separately excited dc motor

Abstract

A PIC microcontroller based closed loop speed control scheme has been developed for the speed control of a separately excited DC motor fed from PV array. An IGBT based boost converter is used as an interface between PV array and the DC motor. The microcontroller has been programmed to automatically vary the duty cycle of the boost converter depending upon the set/required speed of the motor. The DC motor model has been developed and the complete simulink model of the ....etc

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A variable-speed controller, for an existing 225 kW fixed-speed wind power generator, is presented in this paper. A sensorless direct torque control algorithm-based controller is proposed for the squirrel-cage induction generator. Generator torque reference is derived based on sensorless maximum power tracking mode algorithm, up to the base speed of the generator. A three-phase front-end converter is used here to deliver the generated power to the grid with unity-power-factor operation at all wind speeds. This algorithm is based on direct activ ....etc

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This article is presented by:
O. Barambones , A.J. Garrido , F.J. Maseda and P. Alkorta Speed Sensorless Vector Control of Induction Motors Based on
Robust Adaptive Variable Structure Control Law

ABSTRACT
A novel sensorless adaptive robust control law is proposed to improve the trajectory tracking performance of induction motors. The proposed design employs the so called vector (or field oriented) control theory for the induction motor drives and the designed contro ....etc

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FLUX ESTIMATORS FOR SPEED-SENSORLESS
INDUCTION MOTOR DRIVES



Abstract

This thesis deals with flux estimators for speed-sensorless induction motor drives. To enhance
the stability and the performance of state-of-the-art sensorless drives, new flux estimator
designs based on the standard motor model are proposed. Theoretical and experimental
research methods are both used. The dynamics and stability of flux estimators
are analyzed using linearized models, and the effects of parameter errors are investig ....etc

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SPEED SENSORLESS SEPARATELY EXCITED DC MOTOR DRIVE WITH AN ADAPTIVE OBSERVER


ABSTRACT
This project deals with a speed sensorless separately excited dc motor drive which uses the adaptive observer to estimate the rotor speed. The stability analysis of speed estimation is carried out. The modified feed forward control is integrated with the adaptive observer to simplify the implementation. The design guideline for feedback gain and the speed controller are also given to assure system stability for the entire operat ....etc

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Abstract

Inverter-based distributed generation has large potential to provide premium power quality.An adaptive grid-voltage sensorless interfacing scheme for inverter-based distributed generation (DG) units based on an
adaptive grid-interfacing model. First, a discrete-time model of a current controlled grid- connected inverter is presented.Then, an adaptive grid- interfacing model is designed with low computational demand to estimate, in real-time, the interfacing (impedance) parameters seen by the inverter and the grid vo ....etc

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Presented by:
Reza Raoufi
Hamid Khaloozadeh


Abstract

A robust/adaptive stochastic observer is presented for stochastic nonlinear dynamics having excessive uncertainties. It was shown through a new theorem that the proposed nonlinear robust sliding mode observer has very accurate state estimate error characteristic. The observer uses the sliding mode technique for the robustness and a deterministic adaptive law to guarantees a globally asymptotically convergence observation error. Finally, an example is given to illustrate t ....etc

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please sir send me the sensorless induction motor ppt ....etc

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To get full information or details of transfer function of a separately excited dc generator please have a look on the pages

http://seminarsprojects.net/Thread-speed-sensorless-separately-excited-dc-motor-drive-with-an-adaptive-observer-report

if you again feel trouble on transfer function of a separately excited dc generator please reply in that page and ask specific fields ....etc

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