531 research outputs found
Predictive middle point modulation: a new modulation method for parallel active filters
When designing an Active filter, using a current-controlled voltage source inverter, there are two main tasks : to generate an appropiate reference, for nulling harmonic current and reactive power, ant, on the other side, to generate a switching pattern that permits to follow the reference as close as it can be done. Predictive Middle Point Modulation (PMPM) is a novel modulation technique, specially suited for Active Filters. This method is derived from predictive Dead-Beat controller, improving its dynamic response and current error. Simulation results confirm the validity of the proposed method. Experimental results will be provided in the final paper
New controllability criteria for 3-phase 4-wire inverters applied to shunt active power filters
In shunt active filter applications, the 3-phase 4-wire topology is frequently used when dealing with unbalanced loads containing zero sequence components. A new design criteria for this topology is presented, based on the well-known existing method for the 3-phase 3-wire system. Simulation and experimental results confirms the validity of this new criteria, providing an easy method for the design of the reactive elements involved in a shunt active filter
Microwave-driven synthesis of bisphosphonate nanoparticles allows in vivo visualisation of atherosclerotic plaque
A fast and reproducible microwave-driven process has allowed us to synthesise neridronate-functionalised nanoparticles. Contrary to tradition, the phosphate groups decorate the outside layer of the particles providing Ca2+ binding properties in vitro and selective accumulation in vivo in the atheroma plaque. In vivo and ex vivo detection by T2-weighted MRI is demonstrated and validated by histology. The accumulation in the plaque takes place in less than one hour following the intravenous injection, which is particularly suitable for clinical applications
Educational software interface for power electronic applications
The design of friendly user tools for power electronics applications is a hot topic among the researchers all over the world. In fact, the digital signal processors programming is a hard task which requires a deep knowledge of the specific hardware platform where the user control program is implemented. In this paper, a user interface for programming digital signal processors (DSP) to control a power electronic converter is presented. The proposed program, called jscomm, is currently used as a useful tool to understand how the DSP is programmed, to control a power converter safely and to monitor all the interesting variables of the power converter operation
Incremental SVM of controlled full-bridge rectifiers to allow IEC 61000-3-2 enforcement in power grid connection of modern elevator systems
The purpose of this paper is the study of different power converters and control techniques to allow power grid connection of modern vertical operation systems, verifying IEC 61000-3-2. We focus on the harmonic current analysis produced by the industrial standard AC/DC/3-phase AC machines system. Different AC/DC converters and control techniques have been compared to determine the one that minimizes low frequency harmonic current production. An incremental space vector modulator to regulate power grid current flow in electrical reference frame with a full-bridge controlled rectifier has been proven as the best power grid connection system. A general purpose test rig has been designed to evaluate the different power grid interface policies. Experimental results have been provided to show the effectiveness of the method
SMARTeaching: Uso de dispositivos móviles en el aula y eficacia de las clases presenciales
Sección Deptal. de Bioquímica y Biología Molecular (Biológicas)Fac. de Ciencias BiológicasFALSEsubmitte
Fuzzy logic application for improving speed control and captured energy using the wind speed information for wind turbines
This paper describes a fuzzy logic application for improving the variable speed and blade pitch wind
turbine performance. The simulated model is going to be implemented using a programmable logic
controller as the fuzzy controller designed. The used fuzzy controller as well as improving transition
between power optimization and power limitation of the wind turbine at rated wind speed, it also
permits to improve the captured wind energy at high wind speed working conditions using wind speed
as input controller
Cartografía de la vegetación submarina en el enclave natural protegido de las Encañizads del Mar Menor
Fundación Biodiversida
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