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2016 International Conference on Electrical Systems for Aircraft, Railway, Ship Propulsion and Road Vehicles & International Transportation Electrification Conference (ESARS-ITEC)
In this paper, a way to reduce steady-state errors of the state variables with a control technique based on the Lyapunov stability for a boost converter, which supplied by the power source through an input LC filter, is proposed. Lyapunov stability analysis gives the control switching command corresponding to the stable operation of the system at each sampling time. An observer is used to estimate...
This paper presents the hardware and software design of a battery monitoring circuit developed to be used in aviation applications employing lithium-ion batteries in their electrified powertrain. The considered aircraft is a manned sailplane able to take-off and climb by using its electric propulsion system supplied by NCA/Graphite lithium-ion batteries. The battery monitoring electronics was developed...
Spring stiffness is the key parameter of an active suspension consisting of an actuator and a mechanical spring. The effects of the spring stiffness on suspension performances are investigated comprehensively. A novel multi-objective optimization technique of the spring stiffness in automotive active suspension systems is developed in this study. The novel optimization objective is proposed as the...
In electrical drive applications based on induction machines, such as the propulsion drive of an electric vehicle, the rotor currents cannot be measured, so it needs to be estimated. This paper describes the rotor currents estimation through reduced order estimator known as Kalman filter to apply a speed-sensorless control of dual three-phase induction machines by applying a current inner loop based...
Currently, former DC supply systems reach their limits. In several European Railway networks, there are several sectors where it is not possible to operate locomotives at their nominal ratings or to increase traffic. Indeed, the line-voltage drops between substations leads to severe limitations. To improve the power capacity of the line, a three-wire supply system with voltage boosters based on Imbricated...
The TeDP concept has been presented as a possible solution to reduce aircraft emissions despite the continuing trend for increased air traffic. However, much of the benefit of this concept hinges on the reliable transfer of electrical power from the generators to the electrical motor driven propulsors. Protection and fault management of the electrical transmission and distribution network is crucial...
The layout of power modules is one of the key points in power module design, especially for high power densities, where couplings are increased. Stray inductances cause various problems in switching devices and should be minimized at an early design stage to avoid later required countermeasures and redesign after the device prototype has been built. In this paper, using Ansys® Q3D® Extractor, electromagnetic...
Powertrain design is all about finding compromises between the different components. This is a multidisciplinary task that requires a good knowledge of the factors driving the cost and size of the components and how they interact with each other. For the exposed reason, this work firstly presents a methodology to estimate the size and cost of power electronics converters, electrical machines and mechanical...
This paper compares the efficiency of DC/DC Boost converter using SiC fly-wheel diode or synchronous rectifier in different working modes. Analyze the high current spike during turn-on transient of main switch based on simulation. The method to realize soft switch without additional devices is discussed and the problems existing in this method can be solved by the application of the new device effectively.
All Electric Ships (AESs) are becoming a standard for what it concerns large ships with large power requirements (for both propulsion and onboard loads). At present, the design of shipboard complex power system (namely the IPS — Integrated Power System) is done through a well-proven process, relying on historical data and trial-and-error procedures developed in nearly 30 years of design experience...
The Ohio State University Buckeye Current is a student team formed in 2010 to provide practical experience in designing and building electric motorcycles, and to compete in national and international races. The mission of the team is to teach students about electric vehicles, promote electric vehicle events, and give students an engaging educational work environment through real-world experiences...
The paper deals with controlled induction motor for traction units of railways vehicles. Based on a conventional speed-sensorless vector-control of induction motor drives, some numerical investigations are carried out in order to verify the suitability of an open-loop observer in the context of railway traction applications with their specific requirements. In particular, the attention is focused...
The most recent GreenTeam race car, the E0711-7, has been designed and built to set a new level of high performance race cars made by GreenTeam. This paper investigates the E0711-7's high performance powertrain design process, powertrain structure and the unique oil-cooled battery pack. Experimental results from test bench measurements and race data have been reported to illustrate the powertrain...
In this paper, an electric naval propulsion system based with a Doubly Fed Induction Machine and two Voltage Source Inverters is proposed. So, in this propeller motor architecture the DFIM is fed by Stator and Rotor Voltage Source Inverters (VSIs). To produce more efficient and environmentally-friendly ships, a certain number of new concepts have been developed. So, the main idea of this study is...
A reliable and accurate estimation of the parameters of batteries equivalent models is of paramount importance in many applications. This paper is focused on electric vehicle framework. A simplified method for estimating these parameters is presented and validated. The proposed methodology introduces the concept of apparent state of discharge (ASOD), i.e., the traditional state of discharge adjusted...
It makes no doubt in most people's mind that future transportation will become more and more electrical. However the penetration rate of electrification will greatly depend not only on the performance of the system — autonomy being one of the most critical aspects — but also on cost and system reliability. In this paper, a novel system approach for driving 3 phase inverters power stages will be presented...
An electric vehicle (EV) energy management system concept is proposed in this work. Its goal is to prevent power outage in residences and delivery/receive energy to/from the utility grid, in case of local grid disturbances. Unlike the vehicle-to-home (V2H) systems known in the literature, the power system does not require structural changes in a typical home EV battery charging system. Such system...
Currently, lithium batteries are characterized by higher energy density but they require an accurate charge and discharge profile to increase its lifetime, and it is not easily to be obtained feeding urban railway systems. On the other hand, supercapacitors are powerful components, which can deliver very high power pulse for both traction and braking phases. The hybridization of these energy storage...
This paper presents an analytical modelling approach for Switched Reluctance Machines (SRMs) with a wide saturation range. There are many existing analytical modelling approaches in literature that give good accuracy, however most do not consider modelling accuracy in the deeply saturated region of operation. The proposed modelling method is suitable for SRMs operating under the entire saturation...
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