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2016 International Conference on Electrical Systems for Aircraft, Railway, Ship Propulsion and Road Vehicles & International Transportation Electrification Conference (ESARS-ITEC)
The multiple main motor drive system for railway vehicles is more excellent than another circuit system of one inverter and one induction motor, from the viewpoint of cost and space-saving of electric equipment. On the other hand, the motors fed by one inverter are controlled collectively. As a result, when re-adhesion control is executed, the traction force and vehicle acceleration of the former...
Voltage stability is a key problem in Medium Voltage DC (MVDC) power systems. A model of a power system able to give proper stability information as a function of load converters control bandwidth is of fundamental importance, particularly if simple and of simple application. In this paper, a notional system composed by two cascaded DC-DC buck converters is considered. It is modeled at small-signals...
In this paper, a novel model considering iron losses for calculating synchronous machines is presented. The model is used for a study on a permanent magnet synchronous machine (PMSM) for traction applications. However, the main idea is a general approach and can be transferred to other types of synchronous machines. The introduced iron loss model is implemented as an extension of the calculation method...
In this paper, a Buck-Boost operation in a bidirectional ZVS DC-DC converter is proposed. Initially, the static analysis of the proposed operation is presented, providing fundamental knowledge for a project methodology. Finally, in order to prove the theoretical analyses, simulation results are presented and discussed.
The authors present a 3-chip mixed integration approach that combines monolithic silicon multi-terminal power chips and flip-chip assembly on a printed circuit board (PCB) for the realization of a multiphase power converter. The overall approach allows for taking advantage of the degrees of freedom offered by silicon and PCB technologies with a limited and well-mastered complexity. The multiphase...
The current trend for future aircraft is the adoption of the More Electric Aircraft (MEA) concept. The electrical based starter-generator (S/G) system is one of the core ideas from the MEA concept. The PI based control scheme has been investigated in various papers for the permanent magnet based S/G system. Different control schemes are to be considered to improve the control performance of the S/G...
Due to automotive industrial constraints, the number of sensors on the electric powertrain has to be reduced. Thus, the stator phase currents of the wound rotor synchronous machine are not directly available and they have to be estimated. In this paper, different solutions of estimation are proposed. The first one is based on the extended Kalman filter, and the second one is a non-linear estimator...
This paper proposes a robust predictive current control with total disturbance observer for a synchronous motor drive. The traditional predictive current control is sensitive to system parameters, because its predictive model is based on the precise system description. However the parameter variations in electric motors are inevitable due to ambient temperature and magnetic saturation effect. To solve...
This article assesses the potential benefits of transient energy storage for a hybrid regional aircraft. The mission profile of a reference aircraft is analyzed according to energetic intermittence and the results are compared to typical figures for cars, trains, and ships. Also, the opportunity of recovering energy in descent and during landing is studied. This article shows that energy saving potential...
In recent years, there has been an increasing interest in the adoption of drones for monitoring a variety of infrastructures. Infrastructure monitoring systems are widely adopted to detect faults before they can lead to severe failures. They can be found in a number of civil structures, including bridges and viaducts, and also in many other applications of smart-maintenance, prognostics, health and...
Lightning is one of the most unpredictable and destructive forces in nature, and ensuring the protection and safety of aircraft in flight, as well as other modes of airborne transport, when struck by lightning presents a unique set of engineering challenges. In order to progress into a new generation of conductive carbon composites and/or embedded light-weight lightning protection systems, further...
This paper presents an advanced modelling of an Electric Propulsion System (EPS) for light-duty Electric Vehicles (EVs). It is developed within the Matlab Simulink environment by taking into account suitable models of each EPS components, namely the energy storage system, the electrical drive and the transmission system, as well as the overall vehicle model. Particularly, a Li-ion battery is considered,...
The lead-acid battery of an electric minibus has been replaced with a smaller size lithium-ion battery system consisting of standard 12 V modules and a hierarchical battery management system. The minibus has experimentally been tested to show that the reduced battery capacity, which also cuts costs, does not affect the daily operational mission. This is assuming that the driving phases are alternated...
Dynamic wireless charging of Electric Vehicles (EVs), can lead to an increase of EV range while reducing battery size and associated costs. Moreover, charging that uses energy from renewables could lead to decisive CO2 emissions' reduction. Such large scale development requires intelligent power management control ensuring the demand-supply balance and grid stability. Deployment of such ICT solutions...
The railway traffic is rising and implying an increase in electrical power consumption. However, reducing the energy consumption is required. The railway traffic system is observed as a chain of distributed loads while trains are in the accelerating mode and also as distributed generators while trains are in the decelerating mode. Therefore a distributed smart energy management is needed to take full...
Battery's modelling for an aeronautical application is presented in this paper. An electric equivalent circuit model is chosen to represent battery's behavior and is identified with a large characterization test matrix using a LiFePO4/graphite cell. Temperature dependencies have been then modelled using Arrhenius law for some of model's parameters in order to lighten their lookup tables for further...
For electric vehicle applications, it is desirable to achieve maximum torque output of the traction motor for fast acceleration and minimize electrical losses, from energy saving point of view, which is achieved by Maximum Torque Per Ampere (MTPA) and Maximum Efficiency (ME) control methods, respectively. This paper introduces a compromise solution between MTPA and ME approaches obtained for Interior...
Higher efficiency, power density, reliability and longer lifetime of power electronic devices would stem from progresses in material science. In this work, we propose to use a high performance thermoplastic polymer PAEK as packaging box to extend the operating temperature above 200°C. More, the laser transmission welding process has been applied to PAEK to join the two-part module. In order to validate...
Novel power semiconductor devices such as GaN High Electron Mobility transistors and SiC MOSFET are allowing significant improvements on switching speeds. Currently, gate drivers are one of the main limitations preventing the highest switching speed operation of wide bandgap power transistors. More especially, isolation barriers are limiting the Common-Mode Transient Immunity (CMTI) of dedicated gate...
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