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Philippe Barrade

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Related publications (48)

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Series connection of supercapacitors, with an active device for equalizing the voltages

Alfred Rufer, Philippe Barrade, Serge Pittet

The paper presents an active sharing device, for equalizing the voltages across a series connection of supercapacitors. This ensures an optimal value for the stored energy. Based on a buck-boost topology, this device is designed and controlled to propose a ...

2000

Non-Isolated DC-DC Converters for High Power Appli-cations - Control of the Capacitive Voltage Divider

Alfred Rufer, Philippe Barrade

A non-isolated DC-DC converter is presented, based on the current diverter principle. The converter is foreseen for large power electronic applications where normally the converters are fed from DC supplies at a typical voltage level of around one or two k ...

2014

Replacement and emulation of a lead-acid battery with supercapacitors for a UPS application

Alfred Rufer, Philippe Barrade, Yannick Louvrier

This contribution proposes the study of an ‘On-Line’ UPS, where adaptations have been made to replace the initial batteries with supercapacitors. As the electrical behavior of supercapacitors is different from that one of lead-acid batteries, a power elect ...

2008

Multiphysic Modeling of a Hybrid Propulsion System for a Racecar Application

Alfred Rufer, Philippe Barrade

A hybrid propulsion system has been designed for an optional use in the Formula S2000, based on supercapacitive energy storage coupled to an ICE engine via a Synchronous PM machine. Because of the high level specification of the weight penalty in competiti ...

2008

New self-switching mechanisms for active bidirectional switches

Alfred Rufer, Philippe Barrade, Daniel Siemaszko

The self-switching principle is a synthesis of synchronous type switching and switch inner protection mechanisms. Both switch ON and switch OFF are performed on the base of current and voltage measurement across the switch. Applied to an active bidirection ...

2007

Voltage Step-Up Converter based on Multistage Stacked Boost Architecture (MSBA)

Alfred Rufer, Philippe Barrade, Gina Kristin Steinke

A non-isolated DC-DC converter is presented, based on the current diverter principle. The converter is foreseen for larger photovoltaic plants or other DC collection networks for renewable energy sources. The topology allows the DC-DC conversion as step-up ...

2014

Simulation tools for Power Electronics : Teaching and Research

Philippe Barrade

The LEI (Laboratoire d’Electronique Industrielle) is one of the laboratories of the DE (Département Electricité) of the EPFL. Its mission and goal are the research and the teaching in the domains of Industrial and Power Electronics. Simulation tools are us ...

2001

Weight and efficiency optimization strategy of an interleaved DC-DC converter for a solar aircraft

Alfred Rufer, Philippe Barrade, Yannick Louvrier

Today, energy saving is one of the main objectives for engineers. In the case of mobile applications, energy can be saved by two different ways. First, decreasing the total masse of the system, and second, increasing the efficiency of the overall system.Th ...

Ieee Service Center, 445 Hoes Lane, Po Box 1331, Piscataway, Nj 08855-1331 Usa2009

Influence of the mechanical limitations of a traction system on energy storage design

Philippe Barrade

An innovative subway without supply rail is presented. This article deals with the sizing of the required on-board energy between two stations in the worst case. The influence of the mechanical limitations is studied: acceleration, jerk and torque limitati ...

Elsevier2010

Maximum Control Structure of a Series Hybrid Electric Vehicle using Supercapacitor

Philippe Barrade

The main problem with Hybrid Electric Vehicles (HEV) is the management of batteries. We suggest to replace the batteries by an energy storage ystem made of supercapacitors on a series HEV with two traction drive. A maximum Control Structure (MCS) of such a ...

2005

Energetic Macroscopic Representation of a Hybrid Elevator – Considerations on Strategies for Energy Management

Alfred Rufer, Philippe Barrade

Accumulators are inserted on the DC bus of a conventional elevator, to increase its efficiency and limit the power demand on the main feeding grid. In the process that enable the identification of the control of such a system, The Energetic Macroscopic Rep ...

2013

An Energy-Flow Based Methodology - Application to hybrid vehicles

Alfred Rufer, Philippe Barrade

A new methodology is presented, based on energy-flow analysis on systems. The aim is to obtain a representation of energy flows between the various sources of a complex system, via energy storage devices connected together with electrical and mechanical co ...

2006

Renewable energy systems for racing sailboats - From simulations to an experimental device

Alfred Rufer, Philippe Barrade

Providing racing sailboats with renewable energy sources deals with boat performances, reliability and skipper’s security. In this study, an innovative solution is presented to feed a sailboat with green energy by using a hydro-generator. This paper also i ...

2013

Application de supercondensateurs dans le transport individuel Etude expérimentale d’un scooter électrique avec assistance en puissance

Alfred Rufer, Philippe Barrade

La plupart des véhicules électriques utilisent des accumulateurs électrochimiques qui sont sollicités par des puissances instantanées élevées. Ces derniers posent le problème de leur longévité et du rendement énergétique. Cet article présente une approche ...

2008

Control of a Modular DC-DC Converter Dedicated to Energy Storage

Alfred Rufer, Philippe Barrade, Émilien Luc Henri Coulinge

A DC-DC converter system is presented based on an Input-Series/Output-Parallel Dual Active Bridge structure, in a full modular design. The association of 4 elementary modules leads to a one stage DAB. The proposed converter is dedicated to interface a DC-v ...

2015

Fail-safe Modular Control Platform for Power Electronic Applications in R&D Environments

Alfred Rufer, Philippe Barrade, Nicolas Cherix, Simon Delalay

This paper presents a modular control platform which is tailored for teaching and research applications. It aims at being entirely “student-proof” and features software-independent safety mechanisms, extensive signal conditioning and easy-to-use interfaces ...

2013

Energy storage system using a series connection of supercapacitors, with an active device for equalizing the voltages

Alfred Rufer, Philippe Barrade, Serge Pittet

An energy storage system based on battery and supercapacitors is presented. It allows bigger amount of intantaneous power. The properties of the proposed system are oriented in high efficiency, in a special topology with parallel channels. The paper presen ...

2000

The Active Self-controlled Free-wheeling Management Principle Applied to Reverse Recovery Losses Reduction

Alfred Rufer, Philippe Barrade, Daniel Siemaszko

Several works suggest the imminent appearance of bidirectional active devices. The promised performances go in the direction of a reverse recovery effects reduction and efficiency improvement. Our purpose is the study of an active management for switches t ...

2007

Energy storage and applications with supercapacitors

Philippe Barrade

Dedicated for energy storage, supercapacitors offer new solutions in various applications. This contribution describes briefly main principles of supercapacitors, basics for the design of a supercapacitive tank, and the needed power electronics development ...

2003

Multiport Resonant DC-DC Converter

Drazen Dujic, Philippe Barrade, Yan-Kim Tran

his paper presents a multiport galvanically isolated LLC resonant DC-DC converter suitable for DC applications. A three-port structure is analyzed, with full bidirectional power flow capabilities, simple control and behavior similar to that expected from a ...

2015