Ernane Antônio Alves Coelho

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Temporary voltage sags are the main cause of untimely arrest in automated systems that use adjustable speed drives (ASDs). In this context, this paper presents an analysis of a new hybrid three-phase rectifier designed to correct the power factor and to promote voltage sag ride-through capability to ASDs. To prove the effectiveness of the proposed solution,(More)
Due to the considerable increase of electronic power processing devices in various segments of industry, the necessity to control and limit the harmonic content of current injected into the distribution systems through the development of pre-regulator converters, has become ever more apparent. Concomitantly, the development of new microprocessors has(More)
This paper presents a quadratic boost converter using a single quasi-resonant network to reach soft commutation. A resonant inductor, a resonant capacitor, and an auxiliary switch form the resonant network and the main switch operates in a zero-current-switching way. A complete analysis of this converter is presented. According to the simulation and(More)
One of the most interesting areas for researchers in<lb>power electronics is the use of microprocessor circuits replacing the<lb>existent analog circuits employed in converter control. Due to the increasing progress in microprocessor<lb>circuitry, there have been high technology components available that<lb>are perfectly suitable to converter control. The(More)
This paper presents the study and implementation of an electronic load for fuel cell testing. In a typical fuel cell electrical testing, it is necessary to draw a controllable dc current from it, thus an electronic load based on the boost converter is connected to the cell to control its output current. The design procedure and simulation results are(More)
This paper presents the design of a controller based on Internal Model Control (IMC) applied to a grid-connected single-phase PWM inverter. The mathematical modeling of the inverter and the LCL output filter, used to project the 1-DOF IMC controller, is presented and the decoupling of grid voltage by a Feedforward strategy is analyzed. A Proportional -(More)