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2016 International Conference on Electrical Systems for Aircraft, Railway, Ship Propulsion and Road Vehicles & International Transportation Electrification Conference (ESARS-ITEC)
Network reconfiguration is the key technology to realize the autonomous operation and safety enhancement in aircraft power distribution system. The goal of reconfiguration is to achieve maximal power supply under different fault conditions. This paper proposes a power priority based reconfiguration algorithm. To verify the validity of the algorithm, an aircraft power distribution system is discussed...
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...
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 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...
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...
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...
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...
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...
Charging electric vehicles, especially if carried out without any coordination, can cause significant voltage variations on some existing distribution networks in low voltage. Especially because the latter are not designed to take account of a strong variability of the loads, both in charging, but in some cases also in the generation, if the vehicle is supposed as an energy storage element. In this...
In this paper, a universal circuit breaker for aeronautic testing is proposed. The aim of the work is to discuss the design and simulations of a circuit breaker that can work with a low/high and AC/DC voltage source. Furthermore, the breaker can work in single or three phase mode synchronizing more devices. Thanks to the high performance DSP installed on board and the general purpose protection system...
Medium voltage DC (MVDC) grid has quite a lot advantages for the application of large power electric ships, while the DC breaker and DC distribution are the key equipment. Solid state transformer (SST) composed by power electronics transformer and high-frequency transformer has high power density and high efficiency, so it can be used for the power conversion from MVDC to low voltage DC or AC, especially...
This paper presents the design of a control strategy for Hybrid Photovoltaic — Battery Generator for Onboard Automotive Application. The proposed strategy is based on maximum power point tracking (MPPT) controller using adaptive fuzzy logic approach combined with an energy management supervisor in order to ensure system efficiency under variation of operating conditions: load requirements, meteorological...
This paper presents the results of a system analysis of different options for electric inverters for the traction drive of an electrical helicopter. The article explains the optimal choice, in terms of the design requirements and future operation conditions, and the type and topology of electric inverter, to supply the traction permanent magnet synchronous motor from the batteries. The main focus...
In this paper, three electric vehicle (EV) powertrain simulators are analyzed by combining their modeling methodologies into a single MATLAB script file. A simplified electric vehicle powertrain (SEVP) simulator is compared with two widely used powertrain simulators, ADVISOR and FASTSim. Validation of the simulators is carried out using dynamometer test data on two models of the Nissan LEAF from the...
Electric Vehicle (EV) technology is advancing rapidly. Battery storage technology is a prime contributor to vehicle range increases, charging time reductions, and cost reductions. These technology improvements are predicted to rapidly change the popularity and usage of EVs. These advances will cause the need for comprehensive models of EV usage and charging, and the resulting requirements on the electric...
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