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This paper presents an investigation of an inverter fault tolerant direct torque control (DTC) of permanent magnet synchronous motor (PMSM) with loss of one leg. In case of faulty inverter, continuous operation is necessary and thus a breakdown of the PMSM drive is unacceptable. The basic idea of this work consists in analyzing performance of a three legs inverter and two legs inverter fed PMSM drive...
this paper proposes a fault tolerant control (FTC) for permanent magnet synchronous motors (PMSM) using field-oriented control (FOC) and direct torque control (DTC) strategy. In order to ensure continuity of operation and without losing PMSM performance in fault, the proposed FTC allows transition from FOC to DTC. The FOC of PMSM drive needed a mechanical sensor to measure rotor position but with...
This document deals with a sensorless field oriented control (FOC) for permanent magnet synchronous motor (PMSM) drives by using a full order sliding mode observer (FOSMO). We have constructed a FO-SMO to estimate the position and velocity. The Lyapunov theorem is used to verify the FO-SMO stability. The experimental findings indicate the robustness of SM observer under parametric variations.
This paper deals with a new method of on-line stator resistance identification based on model reference adaptive systems (MRAS) technique for high performance sensorless speed control of interior permanent magnet synchronous motor (IPMSM) drive. In order to estimate the rotor position, a nonlinear position observer algorithm based on the IPMSM fluxes is proposed. The nonlinear observer is constructed...
The aim of this article is to present the performance of field oriented control (FOC) and direct torque control (DTC) of a permanent magnet synchronous motor (PMSM) using the technique of space vector pulse width modulation (SVPWM). First, after developing a mathematical model of PMSM we present the principle of space vector modulation technique to use in commands. Secondly, we developed a field oriented...
In this document, an sensorless field oriented control (FOC) for PMSM utilizing the SMO is proposed. We have building a new sliding mode observer to estimate the rotor velocity/position from the back EMF, in which a continuous function (called sigmoid) is applied instead the sign method. The stability verification of our observer was made by the Lyapunov theorem. The effectiveness of sensorless FOC...
In this paper, an Adaptive Type-2 Fuzzy Sliding Mode Control is designed for a class of nonlinear Multi-Input Multi-Output (MIMO) systems with unknown partially dynamics and in presence of external disturbances. To estimate the unknown functions, a Sliding Mode Control (SMC) combined with Type-2 Fuzzy Logic are developed. The discontinuous term of the classical sliding mode law is substituted with...
This paper deals with an observer based output feedback controller for a class of controllable and observable nonlinear systems with an admissible tracking capability. Two fundamental features are worth to be mentioned. The first one consists in the high gain nature of the underlying state feedback control and observer designs. More specifically, a unified high gain control design framework is proposed...
Nonlinear control laws become the most important strategies to control electropneumatic actuator. To get high accuracy and performance, we need the knowledge of all state variables. This paper focus on the design of high gain observer which estimates the unmeasured states (velocity and pressure in chamber N) from the measurements of the position and pressure in chamber P. Simulations results are presented...
This paper proposes a sensorless speed control strategy for a permanent-magnet synchronous motor (PMSM) based on a sliding-mode observer (SMO). In order to apply a sensorless PMSM control which is robust against parameter fluctuations and disturbances, a high-speed SMO is proposed, which estimates the rotor position and the angular velocity. The stability of the proposed SMO was verified using the...
An Adaptive Sliding Mode Control (ASMC) for a class of nonlinear Multi Input Multi Output (MIMO) systems is presented in this paper. In order to reduce the chattering phenomenon without deteriorating the tracking performance, the discontinuous term of the classical sliding mode law is substituted with an adaptive Proportional Derivative (PD) term. The effect of the approximation error which arises...
The effects of climate change and the exponential increase in needs, the issue of saving water wastage becomes more important. The objective of this work is to improve the performance of a station of irrigation by sprinkling which we tried to incorporate a new control law guaranteeing a certain performance. Development is done on a real pumping station. The appearance of a temporal delay and the existence...
This paper presents a comparative study for two frequency control strategy applied to a self excited induction generator equipping a wind turbine in remote site. This study was conducted through the analysis of the frequency in the steady state and transient case using a developed induction generator numerical model. The simulation results obtained by numerical model are validated using an experimental...
This paper deals with the modeling of a centrifugal pump system driven by a three-phase induction motor, which is powered by a photovoltaic generator. The system includes solar panel, a DC / DC converter equipped with its MPPT control, a the three-phase PWM (Pulse Width Modulation) voltage inverter and a centrifugal pump driven by a three phase induction motor. Several algorithms of maximum power...
Permanent Magnet Synchronous Motors (PMSM) are many used to high performance applications. Accurate faults detection can significantly improve system availability and reliability. This paper investigates the experimental implementation and detection of open phase faults in interior permanent magnet synchronous motor (IPMSM). The proposed method of open phase fault detection is based only on stator...
In this paper, a stable adaptive sliding mode based on tracking control is developed for a class of nonlinear Multi Input Multi Output (MIMO) systems with external disturbances. In order to reduce the chattering phenomenon without deteriorating the tracking performance, the discontinuous term in the classical sliding mode technique is replaced by an adaptive Proportional Derivative (PD) term. The...
Low earth orbit satellites networks are capable of providing wireless connectivity to any part of the world while guaranteeing lower delays and better bit error rate performance. During the last years, there have been many growing interests towards the development of small satellites. Using these miniaturized systems as a cooperating network allows cost saving and a short development period. However,...
This paper deals with a new approach for single and multiple open-circuit faults diagnoses in voltage source inverter (VSI) fed induction motors. The diagnosis procedure is based on the knowledge of the outputs inverter currents distribution in α-β frame combined with additional diagnosis variables which use their mean values. In a first step, twenty seven patterns built with output inverter currents...
This paper deals with parameter identification of Hammerstein model having a unified model of several discontinuous nonlinearities containing hysteresis, saturation, preload and dead-zone. This model contains different parameters the choice of which may generate nine different nonlinearities. Contrary to the nonlinearity block structure which is unknown, the structure of linear block is assumed to...
In this paper, a modified fuzzy c-regression model (FCRM) clustering algorithm for identification of Takagi-Sugeno (T-S) fuzzy model is proposed. The FCRM clustering algorithm has considerable sensitive to noise. To overcome this problem, a modified FCRM clustering algorithm is presented. This latter is based to adding a second regularization term in the alternative optimization process of FCRM. This...
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