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A polymer electrolyte fuel cell power module is a complex system involving many couplings between various phenomena (hydraulic, thermal, electrical...). In this paper we present the dynamic system modelling tool that we have developed in order to address these problems. We will focus on the pneumatic, thermal and electrical couplings taken into account in the fuel cell sub-model. Then we propose a...
The time response of current viewing transformer (CVT) that uses a magnetic core to maximize the value of voltage induced in the secondary is limited by the diffusion rate of the magnetic field in the core material. When the current viewing transformer was excited by a capacitor discharge pulse with a rise time of 227 ns, only 95 percent of magnetic flux diffused into the core
Rotor slot design of the induction motor for hybrid electric vehicle drives is investigated in the paper. Rotor slot types of the induction machine for variable frequency drives are deferent from that of the induction machine for industry applications. Improper rotor slot design will lead to bad torque performance and unwished noise of the induction machine. Three common rotor slot types of the induction...
The object investigated in this paper is the induction motor driving system on FAW hybrid electric vehicle (HEV). The structure of entire car system is presented, and its operating mode is analyzed. Also the running states of induction motor system are analyzed with the entire car system in different operating mode. And we manufacture a prototype motor whose indexes are rated power: 40 kW; peak power...
This paper presents a control strategy based on the multilevel hierarchical control for the parallel hybrid electric vehicle (HEV). The simulation model of this control strategy is constructed by using Matlab/Simulink/Stateflow and is optimized by applying the improved particle swarm optimization algorithm. Under the satisfaction with the vehicle dynamic property and the balance of the state of charge...
There are some deficiencies in operation performance of the ordinary motors, as well as the staring performance of solid rotor motors. For the using of electric vehicle, a new type of induction motor with compound cage rotor (IMCCR) is proposed in this paper. To analyze its performance, the physical model and FEM method for the 2D sinusoidal time-varying electromagnetic field are given firstly. Taking...
A novel electromechanical converter - electrical variable transmission (EVT) is introduced. EVT comprises two concentric induction motors and two inverters and is suitable for hybrid electric vehicles. Firstly, an elementary EVT model is given. Next, the operation modes in an EVT-equipped vehicle are analyzed, and the prototype machine and the test bench with results analysis are presented. It is...
After a cursory overview of two key players in the embedded automotive industry, FlexRay and controller area networks, the feasibility for a change in CAN is assessed. CAN is a bus based communication protocol for embedded applications. CAN has well defined message delivery latencies and fills the requirements of a variety of applications that cannot be met by other protocols. FlexRay is a new protocol,...
The Swedish government and the automotive industry cooperate in HEV related research programs, which primarily are carried out as postgraduate university projects. The aim is both to achieve technical results and to educate PhD graduated researchers for the industry. Two coordinated programs have resulted in an extensive network of specialists from academia and industry. A number of courses have also...
This paper investigates operating status and control strategy of hybrid electric vehicle (HEV). It introduces the configuration of HEV system and analyses the typical operating modes, and then focuses on the control strategy of the vehicle. The paper also puts forward the operating status and control strategy of motor system during the vehicle shifting, which in order to solve the problems of HEV...
In a modern vehicle network, safety-critical systems must co-exist with current deterministic networks such as MilCAN. Additionally, it may be advantageous to use MilCAN to monitor the performance of a safety-critical system such as FlexRay. Following a brief overview of both MilCAN and FlexRay technologies, the progress of an ongoing investigation into bridging the two standards is presented. The...
This paper presents an overview of the research project and analysis of a multi-stack axial flux generator. The research project focuses on developing a series hybrid drive system, based on a diesel engine driven prime mover unit and flywheel technology as energy storage, for light rail vehicles. A diesel engine is directly connected to a three-phase AC generator. Finite element analysis, manufacturing...
Electromagnetic launchers can be used to reduce unit costs of payload to orbit. Such launchers are expected to be powered by compulsators. Cross sectional current density distribution in compulsator wires are caused by inductive phenomena, load characteristics and the highly transient nature of the problem. It is necessary to ensure proper current density distribution in order to avoid overheating...
Integrated starter and generator (ISG) can be applied on both internal combustion engine (ICE) vehicles and hybrid electric vehicles. High starting torque and wide working speed range are main features of ISG for quick starting and wide speed range generating coupling with the engine. But it is difficult for motor drives to be large torque and large power at high speed at the same time. A novel hybrid...
This paper introduces a novel in-wheel switched reluctance motor (SRM) with high power density and torque density. The main feature of motor is a special stator-rotor-stator structure that results in substantial reduction of iron usage for a given power output, when compared with conventional SRM and other motor types. Other benefits of this special structure, such as zero net radial force on the...
At the input of AC-DC switching mode power supply, we often use a full wave rectifier and a parallel capacitor to get the direct voltage smooth and level. Because rectifier is non-linear and filter capacitor is an energy-stored component, the combination of those two will make the input alternating current distort greatly. The input pulse shape current contains a lot of harmonic waves. This will reduce...
Multi-converter power electronic distribution systems are being considered for advanced vehicles. The stability of the DC power electronics based power distribution systems is a significant design consideration because of the potential for negative impedance induced instabilities. In order to mitigate the problem of negative impedance instability, this paper presents a novel digital control technique...
Multi-wheel mobile robotic vehicles require speed and torque measurements, which are constrained within practical error bounds. The paper systematically analyses the multiple sensor uncertainty and guarantees bounded input signals for the general case of a PMDC actuator within the context of wheel electrically actuated vehicles. For such vehicles often complex sensors and feedback systems are required...
Power electronics is an inevitable part of vehicular multi-converter power systems. In a multi-converter power system, various buses and loads are connected through different power electronic converters and inverters. These systems consist of a few to tens of converters in electric and hybrid electric vehicles to hundreds of converters in more electric aircraft, sea vehicles, and international space...
Electric bus with supercapacitors (SCs) as the only on-board power source could realize fast and effective recuperation of energy in frequent braking and deceleration in city. However, it's a very challenging task to design a bi-directional DC-DC converter because of wide voltage range and high current order of SCs. This paper presents an analysis and comparative study of several non-isolated bi-directional...
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