Abstract-The aim of this paper is to study the feasibility of fault detection and diagnosis in a three-phase inverter feeding an induction motor. The proposed approach is a sensor-based technique using the mains current measurement. A localization domain made with seven patterns is built with the stator Concordia mean current vector. One is dedicated to the healthy domain and the last six are to each inverter switch. A probabilistic approach for the definition of the boundaries increases the robustness of the method against the uncertainties due to measurements and to the PWM. In high-power equipment where it is crucial to detect and diagnose the inverter faulty switch, a simple algorithm compares the patterns and generates a Boolean indicating the faulty device. In low-power applications (less than 1 kW) where only fault detection is required, a radial basis function (RBF) evolving architecture neural network is used to build the healthy operation area. Simulated experimental results on 0.3-and 1.5-kW induction motor drives show the feasibility of the proposed approach.
Abstract-The aim of this paper is to study the feasibility of fault detection and diagnosis in a three-phase inverter feeding an induction motor. The proposed approach is a sensor-based technique using the mains current measurement. A localization domain made with seven patterns is built with the stator Concordia mean current vector. One is dedicated to the healthy domain and the last six are to each inverter switch. A probabilistic approach for the definition of the boundaries increases the robustness of the method against the uncertainties due to measurements and to the PWM. In high-power equipment where it is crucial to detect and diagnose the inverter faulty switch, a simple algorithm compares the patterns and generates a Boolean indicating the faulty device. In low-power applications (less than 1 kW) where only fault detection is required, a radial basis function (RBF) evolving architecture neural network is used to build the healthy operation area. Simulated experimental results on 0.3-and 1.5-kW induction motor drives show the feasibility of the proposed approach.
This paper proposes an algorithm of maximum power point tracking (MPPT) applied for photovoltaic (PV) power generation systems. The strategy of this algorithm considers the value of short circuit current to generate the current at the maximum power. In this work, the current reference is generated by genetic algorithm (GA). In this way, short-circuit current measurements are not necessary, thus overcoming the reduction in output that result. A robust control law using Linear Matrix Inequality (LMI) tools is developed to track the current reference at the optimum operating point of the PV-panel, in the sense of the MPPT algorithm. The performances of the proposed approach are ensured in simulation, using real proliles of irradiance and temperature measured on platform.
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