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THE MORE ELECTRIC AIRCRAFT FORUM |
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8-11 September 2009 |
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PROCEEDINGS Copyright © 2009 MOET Project Consortium – ALL RIGHTS RESERVED |
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Simulation Study of new Aircraft Electrical Network
performances - Aeroconseil
Synergies in Power Electronics between Aerospace &
Industry/Automotive applications - SIEMENS
Securing the Reliability of Power Electronics Systems
by Applying Robustness Validation - SIEMENS
Power electronics for aircraft application: push for
more standardization
- AIRBUS
SIC technology, a way to improve aerospace inverter
efficiency - hispano suiza
A review of active rectification in aircraft AC systems -
GOODRICH POWER SYSTEMS
130 kW / 200 kVA starter/generator and associated Power
Electronics - THALES AES
Large aircraft integration rig and tests results -
airbus
Alenia 10m test rig: overview and results -
ALENIA AERONAUTICA
More-electric airplane user-systems
Electric Environmental Control System -
LIEBHERR AEROSPACE and AIRBUS
Engine powerplant electrical systems - rolls-royce
More Electric propulsion system -
AIRBUS
The Use of Lightweight Materials in Electrical Power
Distribution - GE AVIATION SYSTEMS
Electrical distribution of high power: impacts,
technologies - zodiac aerospace
Power Quality and Stability Issues in More-Electric
Aircraft Electrical Power Systems
INSTITUT NATIONAL
POLYTECHNIQUE DE TOULOUSE and the UNIVERSITIES
OF MANCHESTER
This paper summarizes the work undertaken by four universities on various aspects of the power quality and stability in more-electric aircraft electrical systems.
Research to identify the stability limits of multiple load systems, the design and optimization of HVDC filters, the impact of regeneration into AC buses, and active damping of HVDC distribution systems are described together with simulation results
Simulation Study of new Aircraft Electrical Network performances
AEROCONSEIL
In the frame of new electrical network architectures development for future aircraft, system integration is a key issue. Advanced powerful simulation tools, such as SABER software, have demonstrated in previous European research projects and aircraft program that they are necessary to optimize designs and to validate electrical network performances.
In the MOET project, multilevel integrations of complex electrical systems are achieved for stability and power quality studies regarding standards requirements. Then, simulation contributes to design development and validation and through correlation with experimental data to perform extrapolation studies.
Model Based Design and Integration of More Electric Aircraft Systems Using Modelica
DLR, DEUTSCHES ZENTRUM FUR LUFT UND RAUMFAHRT
The development of future more-electric air-craft systems is a challenging process, since the respective subsystems are highly integrated in order to achieve an optimum efficiency and performance both at aircraft and at systems level. For mastering this multi-disciplinary challenge, the use of powerful modelling and simulation technologies such as Modelica in all phases of the system development process is a key success factor.
In this paper, new modelling and simulation methods and tools for the different tasks of the design process are presented. This includes the optimisation of the electrical net-work architecture, detailed design and assessment w.r.t. network stability, health status and power quality, as well as system integration using virtual testing.
Synergies in Power Electronics between Aerospace & Industry/Automotive applications
SIEMENS
Since several years, the aircrafts demand has been raised to support the passenger’s traffic growth and the fleet renewal: several hundred of deliveries illustrate this trend.
The A380 was the first aircraft (A/C) using more power electronics technology and with the perspectives of more electrical aircraft, the power electronics utilisation will be unavoidable.
This paper presents the specific requirements on power electronics for A/C applications and compares these requirements with industrial and automotive applications.
Securing the Reliability of Power Electronics Systems by Applying Robustness Validation
SIEMENS
In automotive electronics a paradigm
change took place recently organized by the German ZVEI and the US SAE. Two
handbooks on Robustness Validation are available today – one for Semiconductor
Components and the second for Electric/Electronic Modules.
Thermal Management of Power Electronics in the More
Electric Aircraft
UNIVERSITY OF NOTTINGHAM
The cooling of power electronics for the more electric aircraft presents challenges at both cooling system architecture level and power electronic device level. A range of cooling system architectures has been evaluated and their performance compared to a base architecture.
Both one- and two-phase cooling systems can be used to provide accurate temperature control of power electronic components. Two-phase systems are shown to have potential weight advantages. Five single-phase liquid coolers for power electronic devices were tested and their relative performance evaluated. Jet impingement systems are shown to offer the best performance based on pumping power and weight.
Power electronics for aircraft application: push for more standardization
AIRBUS
The standardization concept is identified as a major driver to reduce the costs of A/C systems.
The standardization of power electronics is expected to expand the use of power electronics through reduced costs and higher reliability. Part of the cost reduction comes from the simplification in the design process that is obtained by using standard modules.
After a short overview of Integrated Modular Avionics concept, the standardization approach for power electronics is outlined. In particular, this paper analyzes the approaches at different levels presenting some ideas about the design of power converters based on standard power cores.
SIC technology, a way to improve aerospace inverter
efficiency
HISPANO SUIZA
Silicone carbide (SiC) components are now becoming commonly known from electrical power designers, but what is the real interest of a such technology for airframer?
In this paper we discuss and argue the potential benefit for aeronautical application to use or not SiC component. A first trade off based on Safran Power results on MOET project will be done with SiC diode and a second one with full SiC components.
A review of active rectification in aircraft AC systems
GOODRICH POWER SYSTEMS
As part of the activities Goodrich Power Systems have completed for the MOET programme we were able to run our Motor Control Unit from the standard 3 phase 230V AC and a 540V DC bus.
Under the 3 phase 230V AC input our Motor Control Unit is capable of both passive and active rectification of the input power to generate a local DC bus voltage. In the case of the 540V DC input this circuitry is bypassed and input power is supplied directly.
This paper explores the possible benefits of Active Rectification at the aircraft level.
Development of permanent magnet brushless starter
generator and associated power electronic for an APU
PBS - Prvni Brnenska Strojirna velka bites and ELCOM
This paper presents a 77 kVA starter generator and its power converter which had been designed, manufactured and tested in the frame of work done within the MOET program [1], a FP6 European Integrated Project, dedicated to establishing the new standards for aircraft electrical system. Details on the experimental starter generator and bi-ways converter design as well as its tests results are given in the paper. Also the way how to further reduce the weight of bi-ways converter is suggested here.
130 kW /
200 kVA starter/generator and associated Power Electronics
THALES AES
In the frame of MOET, THALES AES (TAES) realized and tested a high power starter – generator (S/G) able to generate a 200 kVA permanent power and to deliver a 130 kW mechanical power in starting mode.
The S/G system was tested on the AIRBUS 100m test rig where it operated connected at an Electrical Power Centre and high power converters delivered also by TAES, like an ATRU and a motor inverter.
Large aircraft integration rig and tests results
AIRBUS
In the frame of the MOET project (More Open Electrical Technologies) in the 6th European Research Framework, AIRBUS FRANCE has designed, built, integrated and performed tests on the integration benches called the “100m test rig”.
This test rig has been designed for integration of electrical equipment systems and characterization of new aircraft power networks for large aircraft.
It has been made as much representative as possible in accordance with the needs and with sufficient versatility to be reused for further research projects.
The successful test campaign has led to a better understanding mainly of the 230 VAC network called High Voltage Alternative Current and the +/- 270 VDC network called High Voltage Direct Current, as well as for the electrical engine starting.
Alenia 10m test rig: overview and results
ALENIA AERONAUTICA
Test campaign on the 10m Test Rig integrated in Alenia Laboratories, for the MOET research project, with the Dassault and Eurocopter cooperation and the equipment supplier partnership, Thales, PBS, ECE, UNAP, GAS-F, has investigated the solutions for “all electric aircraft” systems; in particular the 10m Test Rig is fitted for regional aircraft, business aircraft and helicopters.
This paper describes the 10m test rig components and how the test campaign has been performed in terms of test types and in term of measurement.
Electric Environmental Control System
LIEBHERR AEROSPACE and AIRBUS
Considering the additional challenges of the current aeronautical industries a More-electric Environmental Control System has to meet more demanding requirements by the customers.
Consequently Airbus and Liebherr defined an aircraft meeting the requirements that a More-electric Environmental Control System has to fulfil supply of fresh air, pressurization of the cabin and temperature and humidity control of the cabin
Use of automotive data bus in avionics: CAN and Flexray
ZODIAC AEROSPACE, TTTECH COMPUTERTECHNIK and EADS Innovation Works
This paper describes the potential use in avionics for the FlexRay data bus which was initially developed for the automotive field. The goal is to discuss the same type of migration for the FlexRay as it happened for the CAN bus.
This paper is presented in the scope of the MOET European project which by the end of 2009 will bring the baseline for a more electrical aircraft.
EMA technology
development
GOODRICH ACTUATION SYSTEMS and DLR – DEUTSCHES ZENTRUM FUR LUFT UND
RAUMFAHRT
One of the objectives of the MOET project is to resolve and to validate the transformation of power consumption into all electrical solutions. The Electro-Mechanical Actuators (EMA) technology for primary flight controls is logically considered. The validation of this technology has to go through the achievement of the safety critical requirements.
The chosen case study is close to an A320 flight control actuator, with mandatory simplex direct drive architecture.
The intent of this paper is to display the different tasks and facilities set up to substantiate that the most recent EMA technologies can achieve the extremely low jamming probability.
Engine powerplant electrical systems
ROLLS-ROYCE
As the aerospace industry is moving towards the More
Electric Aircraft, there is a growing demand for electrical power to feed the
increasing electrical loads in the aircraft. More Electric Aircraft (MEA) and
More
Electric Engine (MEE) are terms that are sometimes
mistakenly being used interchangeably, but that are actually very different.
This paper outlines some of the issues that have been considered in the MOET
program that relate to the effects of increased electrical power provision on
design of the aircraft engines and the differences between MEE and MEA from the
authors perspective.
More Electric propulsion system
AIRBUS
Airbus have developed for the A380 for the first time
in Civil Aviation an Electrical Thrust Reverser System that open the way to the
industrial development of More Electrical Powerplant Systems. So far, its
in-service reliability records and performance versus former hydraulic systems
have encouraged Airbus.
In the frame of MOET research activities the
contribution of Powerplant has been devoted to
• the definition of
Main Engine starting requirement to help defining the power needs for aircraft electrical
generation
• the analysis of
performance impact at aircraft level
The Use of Lightweight Materials in Electrical Power Distribution
GE AVIATION SYSTEMS
This paper presents an overview of the MOET Primary Electrical Power Distribution Centres (PEPDCs) and the investigations into the use of alternative materials, such as carbon composites and polycarbonates, and the associated manufacturing processes. With the objective to reduce weight and hence aircraft fuel costs the use of standard materials and processes are challenged and the relative performance characteristics for Primary Power Distribution are evaluated.
Standardizing solid state electric distribution
components for a greener and cheaper aircraft
CROUZET AUTOMATISMES
Through its role in MOET, Crouzet has approached the problem of electric distribution in the More Electric Aircraft with a bottom up approach. This bottom up approach has led us to develop stand alone power distribution units (SPDU), a modular approach to the solid state power distribution standardization problem.
Electrical distribution of high power: impacts, technologies
ZODIAC AEROSPACE
In the MOET program, ECE, from Zodiac Aerospace group,
was in charge of the development of high voltages distribution centers. The
Primary Electrical Power Distribution Centers were specifically designed for
the MOET objectives using new technologies : contactors 230VAC and moreover
contactor +/-270VDC, protections redesigned to fit with these new voltages and
high currents, and specific functionalities (e.g. pre-charge system).
The final design of the equipments and their testing on test rigs demonstrate that the distribution of high electrical power (total of 1 MW) with high voltages is possible, in particular through the direct connection to high DC voltage, and feasible with the developed technologies.