Search results for "forme"
showing 10 items of 1192 documents
An improved Flyback converter
2009
This paper presents a modified Flyback converter able to operate with higher efficiency and smaller size, overcoming most of the conventional flyback converter drawbacks, and also keeping its low cost and simplicity. In particular, the proposed converter allows the mosfet off voltage to be reduced and clamped to the input, thus recovering the transformer leakage energy. As a consequence, the duty cycle can be extended to unity, thus reducing the voltage stress across the output rectifier, and lowering both the magnetizing inductance and the transformer bias current values. In addition, due to the auxiliary mosfet, the magnetizing current can become negative, eliminating the discontinuous co…
Small-Signal Modeling of a Controlled Transformer Parallel Regulator as a Multiple Output Converter High Efficient Post-Regulator
2004
This paper presents a post-regulator based on the use of a controlled transformer, which adds or subtracts an additional voltage to the output filter of a converter in order to regulate its output voltage. So, their actuation is complementary to that of more known post-regulators, such as the magnetic amplifier (magamp) and synchronous switch post-regulator (SSPR), because the regulation is achieved by controlling the voltage across the filter inductor instead of its charge time. Besides, the post-regulator processes the power in parallel to the one flowing from input to output and only handles a percentage of it. The post-regulation by controlled transformer is suitable of being employed i…
A high-efficiency regulation technique for a zero-voltage zero-current power switching converter
1998
This paper describes the application of a new regulation technique to a resonant converter that features zero-voltage (ZV) and zero-current (ZC) switching and works at constant frequency and duty cycle. The regulator utilizes the concept of regulating only a percentage of the total power in a bidirectional manner, thus allowing the converter to be optimized for both mass and efficiency. The proposed regulation technique has a wide range of applicability to almost all types of power converters or inverters that utilize a transformer to produce an isolated output. By using the concept of addition or subtraction of AC voltages, a fully regulated output voltage is achieved. The resultant effect…
A demagnetization circuit for forward converters
2009
This paper presents a demagnetization circuit able to operate the forward converter with an higher efficiency and with a wider input range. In particular, by the means of few added components, the magnetizing energy and the leakage one are continuously recovered, and the transformer reset and the primary mosfet OFF voltage clamp to the input, both under steady state and transient operations, are provided. The reduced voltage stress allows the converter to operate with a duty extended to unity over the typical 70% limit of the Active Clamp topology, with smaller output inductance, better converter dynamics and wider input range. Furthermore, thanks to this technique, by employing a duty appr…
Agreement on the Choice of Non-applicable Law or Law not in Accordance with Article 22(1) of the Twin Regulations: what Consequences for the Couple’s…
2021
Los Reglamentos (UE) 2016/1103 y 2016/1104 del Consejo autorizan a las parejas transfronterizas a elegir la ley aplicable a sus relaciones patrimoniales sobre la base de uno de los criterios enumerados en el artículo 22.1. Sin embargo, el acuerdo de elección de la ley puede tener un contenido diferente al señalado en la redacción del artículo 22 de los ?Reglamentos Gemelos?. El objetivo del análisis es ilustrar que sería incorrecto sostener que tales acuerdos son, a priori, inválidos o no permiten la autonomía de la voluntad. Esta cuestión requiere una evaluación de la finalidad concreta del acuerdo de las partes y debería, al menos, estar abierta al examen del tribunal competente.
Un convegno su Francesco Saverio Nitti e le riforme del sistema liberale
2021
E' una breve notizia sul convegno relativo alla figura di Francesco Saverio Nitti e alle sue riforme It is a brief note on a conference about Francesco Saverio Nitti and his reforms.
Campaniformes insulaires et continentaux de France et d'Italie méditerranéennes: Relations et échanges entre Corse, Sardaigne, Toscane et Midi frança…
2006
Les spectaculaires développements régionaux du Campaniforme dans le sud-est de la France, en Toscane et en Sardaigne traduisent, par un certain nombre d'éléments, une origine commune et des relations parfois suivies de contacts et d'échanges dans la seconde moitié du troisième millénaire avant notre ère. Cependant, leur profusion qui s'oppose à la quasi-absence de vestiges campaniformes en Corse, des décalages chronologiques d'implantation et des influences multiples (méditerranéennes, centre-européennes...) montrent l'existence de plusieurs réseaux de diffusion dans le temps et dans l'espace ainsi que des mécanismes historiques complexes.Ce court article propose de croiser différentes appr…
The Emergence of Pastoral Authority in the French Reformed Church (c.1555-c.1572)
2021
In The Emergence of Pastoral Authority in the French Reformed Church, c.1555-c.1572, Gianmarco Braghi offre un'ampia panoramica delle questioni e delle ambiguità connesse all'attuazione dell'autorità della prima generazione di pastori riformati francesi formati a Ginevra e delle loro implicazioni per il carattere e l'identità del primo movimento riformato francese in generale, utilizzandoli come prisma per l'analisi storica della transizione dall'evangelicalismo sciolto a una nascente rete sinodale-concistoriale di congregazioni riformate sparse nel regno di Francia. In The Emergence of Pastoral Authority in the French Reformed Church, c.1555-c.1572, Gianmarco Braghi offers a broad overview…
Bordón : revista de pedagogía
2014
Resumen tomado de la publicación La educación para la salud es una herramienta para conseguir un estado completo de salud para todos. La incorporación de la educación para la salud en el currículo escolar asegura que este completo estado de bienestar llegue a todos debido a la escolaridad obligatoria. A nivel europeo, las administraciones educativas y sanitarias abrieron un amplio cauce de actuación para el desarrollo de su inclusión en la escuela. Conseguir una cultura de la salud para todos es importantísimo y en esto la escuela cumple una labor fundamental. El aspecto más relevante de la investigación es el estudio comparado sobre las políticas educativas de educación para la salud en la…
Rogowski coil current transducer compensation method for harmonic active power error
2015
Abstract In the harmonic active power measurement, the highest uncertainties are generally introduced by the current and voltage transducers. In a previous paper, the authors showed that the current transformer (CT) can introduce significant errors in such measurement, especially if the phase shift between voltage and current is close to ±90°. In such condition the errors on harmonic power measurement are mainly due to the CT phase displacement. This paper shows that better results can be achieved with more linear transducers, such as the Rogowski coil current transducers (RCCTs), whose metrological performance in distorted condition can be improved, by means of a proper compensation method…