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Your search keyword '"FREQUENCY modulation detectors"' showing total 3 results
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3 results on '"FREQUENCY modulation detectors"'

1. Architecture and design of an inductive contactless energy transfer system with two mobile loads for residential applications

Author

Miguel Castilla, Fredrik F.A. van der Pijl, Javier Morales, Arash Momeneh, Ramon Guzman, Universitat Politècnica de Catalunya. Departament d'Enginyeria Electrònica, Universitat Politècnica de Catalunya. Departament d'Enginyeria de Sistemes, Automàtica i Informàtica Industrial, and Universitat Politècnica de Catalunya. SEPIC - Sistemes Electrònics de Potència i de Control

Subjects
Engineering, Contactless system, Complex system, Characteristic impedance, Impedància (Electricitat), Mobile loads, Electronic engineering, Frequency modulation detectors, Impedance (Electricity), Inductance, Inducció elèctrica, business.industry, Moduladors (Electrònica), Electrical engineering, Power (physics), Magnetizing inductance, Electromagnetic coil, Enginyeria electrònica::Electrònica de potència [Àrees temàtiques de la UPC], Enginyeria de la telecomunicació::Radiocomunicació i exploració electromagnètica::Comunicacions mòbils [Àrees temàtiques de la UPC], Mobile telephony, Frequency modulator, Engineering design process, business, Frequency modulation
Abstract

Inductive contactless energy transfer systems with multiple mobile loads are very complex systems. Main challenges of these systems are to propose a suitable architecture and to design their power components. These challenges are particularly more noticeable in residential areas where various types of consumers (loads) are expected. This paper introduces a new architecture and design guidelines for a high-frequency resonant transformer operating with frequency modulation. The design process includes the effects of 1) the resonant frequency, 2) the magnetizing inductance, and 3) the characteristic impedance. The excellent performance of the designed system is validated by simulation results.

Published
2015
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2. Interleaving and switching pattern modulation to conducted EMI reduction

Author

Mon González, Juan, González Díez, David, Gago Barrio, Javier, Balcells Sendra, Josep, Bogónez Franco, Francisco, Universitat Politècnica de Catalunya. Departament d'Enginyeria Electrònica, Universitat Politècnica de Catalunya. TIEG - Terrassa Industrial Electronics Group, and Universitat Politècnica de Catalunya. (TIEG) - Terrassa Industrial Electronics Group

Subjects
Demanat el text complet a Juan Mon (14/12/2012), Lògica de matrius programables, Enginyeria electrònica::Electrònica de potència [Àrees temàtiques de la UPC], Field programmable gate arrays, Frequency modulation detectors, Convertidors de corrent elèctric, Interferència electromagnètica, Power resources, Electromagnetic interference
Abstract

This paper explores new techniques to reduce the conducted EMI generated by switched power converters operating in multiconverter arrangement. These techniques are based in the combined application of interleaving and the modulation of some characteristics of the switching patterns. The effectiveness of such methods in terms of EMI reduction is theoreticaly developed and experimentally validated in a four channel parallel buck converter operating in closed loop. The technique that provides the best attenuation results is identified. Finally, undesired sideeffects produced by these techniques, such as an increase in the output voltage ripple, are evaluated.

3. A new switching frequency modulation scheme for EMI reduction in multiconverter topology

Author

Mon, J., Gago, J., González, D., Balcells, J., Fernández, R., Ignacio Gil, Universitat Politècnica de Catalunya. Departament d'Enginyeria Electrònica, Universitat Politècnica de Catalunya. (TIEG) - Terrassa Industrial Electronics Group, and Universitat Politècnica de Catalunya. TIEG - Terrassa Industrial Electronics Group

Subjects
Moduladors (Electrònica), Enginyeria electrònica::Electrònica de potència [Àrees temàtiques de la UPC], Field programmable gate arrays, Frequency modulation detectors, Interferència electromàgnetica, Electromagnetic interference
Abstract

This paper presents a modulation scheme in order to reduce conducted Electromagnetic Interference (EMI) generated by modular power converters with parallel topology. The proposed scheme is based on a combination of interleaving and Switching Frequency Modulation (SFM) techniques. The objective of this modulation scheme is to cancel certain harmonics of EMI and to reduce the amplitude of the remaining harmonics. The proposed scheme has been implemented in a field programmable gate array and a four channel parallel buck converter has been used in order to verify it. A significant EMI reduction has been obtained in comparison to use the interleaving and Switching Frequency Modulation separately.

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