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检索条件"机构=PPGEE - Graduation Program in Electrical Engineering"

共 28 条记录，以下是1-10 订阅

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MOS Capacitor Modeling and Optimization for Fully Integrated DC-DC Converters 7

MOS Capacitor Modeling and Optimization for Fully Integrated...

引用

7th International Symposium on Instrumentation Systems, Circuits and Transducers, INSCIT 2023

作者： Bernardo, Marcos G. Freire, Raimundo C. S. De Souza, Antonio A. L. Souza, Arthur S. Silva, Henrique D. Federal University of Campina Grande Ufcg Post-Graduation Program in Electrical Engineering PPgEE/UFCG Campina Grande Brazil Federal University of Paraiba Ufpb João Pessoa Brazil

ISBN: (纸本)9798350326512

In this paper, we propose a model for the rapid characterization of MOS-type capacitors in the accumulation region. Closed-form analytical expressions have been used to estimate the equivalent circuit elements, which are calculated as a function of the design parameters of the layout and of the technological process. To verify the modeling carried out, a set of MOS capacitors with different geometries were simulated in ADS® and the main characteristics of the capacitor were compared. Based on the model, an analysis/optimization was implemented in MATLAB® in order to determine the capacitor/cell layout parameters that optimize its structure, based on a figure of merit. Compared to another work in the literature, the proposed method showed a chip-area reduction of 20.82% and an ESR of 16.38% smaller for the same capacitance value. Capacitor optimization not only contributes to reducing costs but also to improving the performance of the circuit it will make part of. © 2023 IEEE.

关键词： DC-DC converters

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Evaluation of a Wireless Power Transfer System with Helmholtz and 3D coils for Biomedical Capsules 6

Evaluation of a Wireless Power Transfer System with Helmholt...

引用

6th International Symposium on Instrumentation Systems, Circuits and Transducers, INSCIT 2022

作者： Magnaguagno, Jeferson Bertotti, Fabio Luiz Universidade Tecnológica Federal Do Paraná-UTFPR Electrical Engineering Post-Graduation Program-PPGEE Pato Branco Brazil

ISBN: (数字)9781665471688

ISBN: (纸本)9781665471688

Wireless Power Transfer (WPT) systems are commonly found in battery charging solutions for electronic devices such as smartphones and tablets. In medicine, they are applied in biotelemetry systems with implantable units and in capsules to monitor parameters of the gastrointestinal tract. Several studies explored WPT systems with inductive links formed by two or more coils. However, few studies have considered inductive links with Helmholtz coils for application in capsules. This paper presents the development of a prototype of a WPT system suitable for monitoring capsules formed by live coils, three of which are a set of 3D receiver coils. The development of a class E amplifier allowed the power delivery to the link. In the experiments performed, the maximum energy (power) received in the load was 662.2 mW for the closest distance between transmitter and receiver coils, while the efficiency reached 3.31 %. Furthermore, the maximum achieved distance that maintained the regulated 3.3 Vcc power supply at load was 240 mm, even with changes in the orientation of the set of 3D receiver coils. © 2022 IEEE.

关键词： Power amplifiers

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MOS Capacitor Modeling and Optimization for Fully Integrated DC-DC Converters

MOS Capacitor Modeling and Optimization for Fully Integrated...

引用

International Symposium on Instrumentation Systems, Circuits and Transducers (INSCIT)

作者： Marcos G. Bernardo Raimundo C. S. Freire Antonio A. L. de Souza Arthur S. Souza Henrique D. Silva Post-Graduation Program in Electrical Engineering PPgEE/UFCG Federal University of Campina Grande UFCG Campina Grande Brazil Federal University of Paraiba UFPB João Pessoa Brazil

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Scalable modeling and synthesis of on-chip spiral inductors 4

Scalable modeling and synthesis of on-chip spiral inductors

引用

4th International Symposium on Instrumentation Systems, Circuits and Transducers, INSCIT 2019

作者： Bernardo, Marcos Gomes Freire, Raimundo Carlos S. De Souza, Antonio Augusto Lisboa Melo, Erico Castro A. Post-Graduation Program in Electrical Engineering PPgEE/UFCG Federal University of Campina Grande UFCG Campina Grande PB Brazil Federal University of Paraiba UFPB João Pessoa PB Brazil

ISBN: (纸本)9781728121093

In this paper, an efficient synthesis for integrated spiral inductors based on particle swarm optimization is presented. The synthesis/optimization process aims to determine the inductor layout parameters that maximize the quality factor while considering the imposed restrictions (project specifications). The spiral inductors are modeled using a double-π scalable model, in which the design parameters of inductor are taken as input. All the elements of the scalable model are calculated from the scalable expressions and process parameters. Particle swarm optimization is used to explore the design space and resolution of the optimization problem. Three design examples of inductors with inductance values of 3 nH, 5.5 nH and 8 nH, and with operating frequency of 2 GHz, 3.5 GHz and 5 GHz are used to evaluate the synthesis process. The obtained results confirm the validity of the adopted methodology and the PSO efficiency in determining the most adequate inductor structure to the project specifications. © 2019 IEEE.

关键词： Particle swarm optimization (PSO)

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Small-signal modeling and analysis of an isolated bidirectional battery charger 13

Small-signal modeling and analysis of an isolated bidirectio...

引用

13th IEEE International Conference on Industry Applications, INDUSCON 2018

作者： Carvalho, Edivan Laercio Carati, Emerson Da Costa, Jean Patric De Stein, Carlos Marcelo Oliveira Cardoso, Rafael Federal University of Technology - Paraná - UTFPR Pato Branco - PR Brazil Post-Graduation Program in Electrical Engineering - PPGEE Static Power Converters Engineering Research Group - ECEE Brazil

ISBN: (纸本)9781538679951

This paper presents the small-signal modeling and analysis of an isolated bidirectional DC-DC converter. The converter is implement based on two Full-Bridge converters. The system is designed to act as a charge/discharge controller for battery banks. The model for each mode of operation is developed using the average state-space model approach. To verify the models, simulations are performed using PSIM software in addition to experimental results obtained from a 200 W prototype that connects a 60 V battery bank to a 230 V DC link. © 2018 IEEE.

关键词： DC-DC converters

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Analytical modeling for the characterization of on-chip spiral inductor in 0.13 μm 3

Analytical modeling for the characterization of on-chip spir...

引用

3rd International Symposium on Instrumentation Systems, Circuits and Transducers: Chip in the Pampa, INSCIT 2018

作者： Bernardo, Marcos Gomes Raimundo Freire, C.S. De Souza, Antonio Augusto L. Erico Melo, C.A. Post-Graduation Program in Electrical Engineering PPgEE/UFCG Brazil Federal University of Campina Grande UFCG Campina Grande Brazil Federal University of Paraiba UFPB Joao Pessoa Brazil

ISBN: (纸本)9781538672983

In this paper, we present the modeling for a rapid characterization of integrated spiral inductors. Closed-form has been used to estimate the parameters of the equivalent circuit, which are calculated as a function of the parameters of the inductor physical design. The double-$\pi$ equivalent circuit was adopted to model the physical phenomena resulting from electromagnetic coupling and high-frequency operation. The method for calculating the oxide capacitance has included the contribution of the fringing electric fields for better prediction of the inductor characteristics. In order to verify the performed modeling, a set of octagonal on-chip spiral inductors with different geometries were simulated in the Momentum ADS and the main figures of merit of the inductor were compared. The mean error between the model and EM simulation was 3.6% for the DC inductance, 7.7% for the maximum value of the quality factor and 1.3% for the self-resonance frequency. © 2018 IEEE.

关键词： Equivalent circuits

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Design and analysis of a bidirectional battery charger 8

Design and analysis of a bidirectional battery charger

引用

8th IEEE International Symposium on Power Electronics for Distributed Generation Systems, PEDG 2017

作者： Carvalho, Edivan Laercio Carati, Emerson Giovani Da Costa, Jean Patric De Oliveira Stein, Carlos Marcelo Cardoso, Rafael Federal University of Technology-Paraná-UTFPR Post-Graduation Program in Electrical Engineering-PPGEE Static Power Converters Engineering Research Group-ECEE Pato Branco-PR Brazil

ISBN: (纸本)9781509053384

This work proposes the design and analysis of a bidirectional and isolated battery charger for applications that involve energy storage like UPS or hybrid generation systems. Bidirectional characteristic is fundamental to allow the charge and discharge of batteries in a single equipment, reducing the number of systems and volume in applications that involve energy storage. In addition, the proposed converter provides low voltage and current ripple that are important to reduce electromagnetic interference and to improve the battery life cycle, as well as reducing semiconductors requirements. © 2017 IEEE.

关键词： Charging (batteries)

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Development and evaluation of a linear variable differential sensor

Development and evaluation of a linear variable differential...

引用

International Symposium on Instrumentation Systems, Circuits and Transducers (INSCIT)

作者： Juliano de Pelegrin Bruno Monte de Carvalho Fábio Luiz Bertotti Jean-Marc Stephane Lafay Jessé de Pelegrin PPGEE - Graduation Program in Electrical Engineering UTFPR - Federal University of Technology - Pato Branco Campus. Pato Branco Paraná Brazil PPGEE - Graduation Program in Electrical Engineering UTFPR - Federal University of Technology Pato Branco Paraná Brazil Industrial Automation Departament IFC - Catarinense Federal Institute - Luzerna campus Luzerna Santa Catarina Brazil

This paper presents the development of a displacement measurement system formed by a Linear Variable Differential Transformer (LVDT) and an electronic instrumentation circuit. A mechanical structure was constructed as a coil to be elaborated from a preliminary analysis of the response of the device. A circuit was developed for the excitation of the LVDT, analog processing and signal conditioning in order to obtain a proportional DC signal for the displacement in its core. The response of the measuring system was obtained for a total range of 80 mm of displacement. The measurement deviations were less than + 0.16 mm and - 0.15 mm.

关键词： Demodulation Transducers Synchronization Magnetic cores Shafts Instruments Displacement measurement

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Analysis, Design and Implementation of an Isolated Full-Bridge Converter for Battery Charging

Analysis, Design and Implementation of an Isolated Full-Brid...

引用

Brazilian Power Electronics Conference

作者： Edivan Laercio Carvalho Emerson Giovani Carati Jean Patric da Costa Carlos Marcelo de Oliveira Stein Rafael Cardoso Federal University of Technology - Paraná - UTFPR Pato Branco - PR Brazil Static Power Converters Engineering Research Group - ECEE Post-Graduation Program in Electrical Engineering - PPGEE Pato Branco PR Brazil

This paper purposes the development of an isolated battery charger. In energy storage systems, these devices are essential, performing batteries charging in the way to maintain their lifecycle and safety since they are main responsible for the costs associated with these systems. In many works theses circuits are implemented through bidirectional Full-Bridge converters. These converters require auxiliary circuits to reduce their switching losses. However, circuits such as snubbers or voltage clampers are not adequately addressed in these works since their use is undesirable for bidirectional operation. To eliminate these circuits in isolated converters, this work presents a switching technique applied in a Full-Bridge converter with the objective to reduce overvoltage in semiconductors and make it suitable for use in bidirectional converters, as in the charge of battery banks.

关键词： Charge controllers Batteries chargers Isolated converters Snubber less converter

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Event-triggered control co-design for discrete-time systems subject to actuator saturation

Event-triggered control co-design for discrete-time systems ...

引用

IEEE International Symposium on Computer Aided Control System Design (CACSD)

作者： L. B. Groff L. G. Moreira J. M. Gomes da Silva Department of Automation and Energy (DELAE) Pos-Graduation Program in Electrical Engineering (PPGEE) Porto Alegre-RS Brazil

In this paper we present a method to simultaneously design a static state feedback gain and the trigger function to stabilize discrete-time LTI systems subject to actuator saturation under an event-triggered strategy. We derive LMI-based conditions that ensure local (or global, when possible) asymptotic stability of the origin based on the Lyapunov theory. To tune the parameters, we propose convex optimization problems aiming at reducing the sampling activity. The efficiency of the proposed method is illustrated by numerical examples.

关键词： Actuators Asymptotic stability State feedback Closed loop systems Discrete-time systems Symmetric matrices

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