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Energy conversion and conditioning technologies, power electronics, adjustable speed drives and their applications, power electronics for smarter grid, energy efficiency,technologies for sustainable energy systems, converters and power supplies
APEC focuses on the practical and applied aspects of the power electronics business. Not just a power designer’s conference, APEC has something of interest for anyone involved in power electronics including:- Equipment OEMs that use power supplies and converters in their equipment- Designers of power supplies, dc-dc converters, motor drives, uninterruptable power supplies, inverters and any other power electronic circuits, equipments and systems- Manufacturers and suppliers of components and assemblies used in power electronics- Manufacturing, quality and test engineers involved with power electronics equipment- Marketing, sales and anyone involved in the business of power electronic- Compliance engineers testing and qualifying power electronics equipment or equipment that uses power electronics
The Annual IEEE PES General Meeting will bring together over 2900 attendees for technical sessions, administrative sessions, super sessions, poster sessions, student programs, awards ceremonies, committee meetings, tutorials and more
IEEE Global Communications Conference (GLOBECOM) is one of the IEEE Communications Society’s two flagship conferences dedicated to driving innovation in nearly every aspect of communications. Each year, more than 2,900 scientific researchers and their management submit proposals for program sessions to be held at the annual conference. After extensive peer review, the best of the proposals are selected for the conference program, which includes technical papers, tutorials, workshops and industry sessions designed specifically to advance technologies, systems and infrastructure that are continuing to reshape the world and provide all users with access to an unprecedented spectrum of high-speed, seamless and cost-effective global telecommunications services.
IECON is focusing on industrial and manufacturing theory and applications of electronics, controls, communications, instrumentation and computational intelligence.
The IEEE Aerospace and Electronic Systems Magazine publishes articles concerned with the various aspects of systems for space, air, ocean, or ground environments.
Component parts, hybrid microelectronics, materials, packaging techniques, and manufacturing technology.
Serves as a compendium for papers on the technological advances in control engineering and as an archival publication which will bridge the gap between theory and practice. Papers will highlight the latest knowledge, exploratory developments, and practical applications in all aspects of the technology needed to implement control systems from analysis and design through simulation and hardware.
Research, development, design, application, construction, installation, and operation of electric power generating facilities (along with their conventional, nuclear, or renewable sources) for the safe, reliable, and economic generation of electrical energy for general industrial, commercial, public, and domestic consumption, and electromechanical energy conversion for the use of electrical energy
Theory and applications of industrial electronics and control instrumentation science and engineering, including microprocessor control systems, high-power controls, process control, programmable controllers, numerical and program control systems, flow meters, and identification systems.
2016 Eleventh International Conference on Ecological Vehicles and Renewable Energies (EVER), 2016
Double-layer capacitors, known as ultra-capacitors (UCaps), are energy storage devices that can be connected in parallel with batteries to create a hybrid energy storage system (HESS) for electric vehicles (EV). This HESS plays an important role in increasing the efficiency and the performance of EV due to the use of the advantages of each technology; the high density energy of ...
IEEE Transactions on Vehicular Technology, 2015
This paper provides a detailed comparative analysis of optimal sizing of battery-only, ultracapacitor-only, and battery-ultracapacitor hybrid energy storage systems (ESSs) for a plug-in electric city bus (PECB). It is shown how the configuration affects the optimal size of the ESS. The problem of optimal sizing of the storage system for the PECB is formulated and solved for a specific set ...
2016 IEEE International Conference on Power Electronics, Drives and Energy Systems (PEDES), 2016
The development of Electric Vehicles is gaining momentum due to diminishing fuel resources and environmental concerns. In Electric Vehicle, batteries form the primary energy storage. Sometimes available power from battery may not be sufficient to meet peak load demands. So, a secondary storage like ultracapacitor can be used in parallel with battery source to meet the power demand, where in ...
2014 POWER AND ENERGY SYSTEMS: TOWARDS SUSTAINABLE ENERGY, 2014
“Energy stored is the energy produced”- this is a popular saying which emphasize the importance of efficient energy storage. Energy crises are very prominent nowadays. Hence, the energy storage devices have become a topic of intense research among the scientists and researchers all around the world. Ultracapacitor is the new name to the list of the energy storage devices that ...
2013 25th Chinese Control and Decision Conference (CCDC), 2013
The ultracapacitor/battery hybrid system makes the best of the characteristics of high energy density of battery and long cycle life of ultracapacitor. The mathematical model of ultracapacitor/battery hybrid system was set up, and the characters of it such as peak power enhancement were studied and the correlative factors were analyzed in this paper. Ultracapacitor and battery are connected in parallel ...
Double-layer capacitors, known as ultra-capacitors (UCaps), are energy storage devices that can be connected in parallel with batteries to create a hybrid energy storage system (HESS) for electric vehicles (EV). This HESS plays an important role in increasing the efficiency and the performance of EV due to the use of the advantages of each technology; the high density energy of the battery as well as the high power of the ultracapacitor. Moreover, batteries subjected to pulsed transient power generate dc voltages with dips that can exceed the voltage regulation band. So, it is revealed that this HESS can assist in maintaining the bus voltage within the regulatory limits, resulting in reduced system losses and prolonged power system life. The purpose of this paper is to investigate the performance of a HESS which consists of an ultracapacitor placed in parallel with a battery, following the injection of constant power pulses. A comparison study between two hybrid configurations is achieved: (i) a battery-RC ultracapacitor circuit and (ii) a battery- multibranch ultracapacitor circuit.
This paper provides a detailed comparative analysis of optimal sizing of battery-only, ultracapacitor-only, and battery-ultracapacitor hybrid energy storage systems (ESSs) for a plug-in electric city bus (PECB). It is shown how the configuration affects the optimal size of the ESS. The problem of optimal sizing of the storage system for the PECB is formulated and solved for a specific set of vehicle parameters, battery, and ultracapacitor cell data, as well as a specific daily drive cycle. A modified particle swarm optimization algorithm is used to solve the optimal sizing problem. The optimization platform developed by the authors and used for this study is highly flexible and accepts different component data, vehicle parameters, and drive cycles as the input for determining the optimal sizes of the storage system.
The development of Electric Vehicles is gaining momentum due to diminishing fuel resources and environmental concerns. In Electric Vehicle, batteries form the primary energy storage. Sometimes available power from battery may not be sufficient to meet peak load demands. So, a secondary storage like ultracapacitor can be used in parallel with battery source to meet the power demand, where in the high frequency current requirements are met by ultracapacitor. The regeneration current transients can be taken by ultracapacitor, preventing battery recharge with high current transients. During regeneration, charging of battery with high current, affects battery life. The control logic can be formulated to meet these conditions, thus maintaining battery conditions optimum, thereby, reducing battery size and increasing the vehicle performance. Since, battery can be operated within safe limits battery life can be enhanced. This paper discusses Power Management strategy implementation for parallel operation of Ultracapacitor and Battery in EV Configuration. In this scheme, Ultracapacitor is connected to DC bus using bidirectional DC DC converter in CCM. Battery system is connected to bus using another bidirectional converter in VCM. Power Split Mechanism is implemented such that, drive current requirement, is met by the ultracapacitor depending on its voltage condition and remaining current requirement is met by battery. Thus the entire drive cycle requirement can be suitably achieved by using ultracapacitor in parallel with battery.
“Energy stored is the energy produced”- this is a popular saying which emphasize the importance of efficient energy storage. Energy crises are very prominent nowadays. Hence, the energy storage devices have become a topic of intense research among the scientists and researchers all around the world. Ultracapacitor is the new name to the list of the energy storage devices that are available today. Ultracapacitors have the highest available capacitance values per unit volume and the greatest energy density of all capacitors. In research work, a new model of ultracapacitor i.e. “zigzag” type had been developed. In this paper, the comparative study of this type of model with two other common models i.e. stack and rolled type is done. All the experimental results have been presented in the paper to support the newly proposed model.
The ultracapacitor/battery hybrid system makes the best of the characteristics of high energy density of battery and long cycle life of ultracapacitor. The mathematical model of ultracapacitor/battery hybrid system was set up, and the characters of it such as peak power enhancement were studied and the correlative factors were analyzed in this paper. Ultracapacitor and battery are connected in parallel by a bi-directional buck-boost converter. Model the ultracapacitor/battery hybrid system under MATLAB 7 and use a double loop PWM to control. The result shows that battery and ultracapacitor could work in optimizing discharge condition when the load power is pulsating. The bi- directional buck-boost converter has better performance and practicability.
In this paper, new modulation schemes are proposed to minimise the circulating power flow, minimise RMS currents and maximise the operating efficiency of a voltage-fed phase-shifted bidirectional DC-DC converter for an ultracapacitor energy buffer, with an IGBT voltage doubler circuit. The mathematical analysis to obtain an optimum power flow controller of the bidirectional converter is presented. Theoretical and simulation results show that the proposed method can maintain minimum circulating power flow even if the ultracapacitor voltage is fluctuating between 50% and 100% of the rated voltage. Furthermore, using the proposed modulation methods a considerable improvement in converter efficiency (up to 93.4%) is achieved in comparison to that for the conventional phase-shift modulation method (around 80%). The proposed modulation scheme is verified by PSpice/Simulink co-simulation using SLPS.
Our team is currently the global technology leader in the field of both carbon-carbon ultracapacitors and hybrid lithium-carbon devices. Main expertise includes R&D in material science, electrochemistry, process engineering, manufacturing engineering, electrical system design and manufacture of ultracapacitor electrodes, cells and modules. The team participated in a number of international research projects, and prototypes of ultracapacitors and hybrids were tested in the Institute of Transportation Studies, UC Davis, in JME Inc., in Wayne State University, and some other labs. All the test results confirm the superlative performance of the devices developed: carbon-carbon ultracapacitors demonstrate the extremely low inner resistance resulting in the highest power capability and efficiency that also reduces the cooling requirements and improves safety. Our “parallel” hybrid devices demonstrate substantially higher energy and power density than competing LIC technologies. In order to make ultracapacitor technology even more attractive to automakers, new organic electrolytes have been developed and are currently under testing (not ionic liquids) at temperatures about 100 °C and voltages up to 3.0 V.
This paper proposes a new method for extracting some equivalent-circuit model parameters of an ultracapacitor using Genetic Algorithm (GA) approach. Ultracapacitors have two main parameters that dictates their performance: internal resistance and the capacitance. These parameters change drastically with temperature variations and age conditions. These parameters also vary from an ultracapacitor to another even if they were from the same manufacturer due to the manufacturing process. Hence, in order to allow accurate prediction of the ultracapacitor performance, an accurate value of these parameters is vital. The proposed algorithm is presented in this paper followed by experimental verification using a BCAP3000 2.7V, 3000F Maxwell ultracapacitor. The accuracy of the algorithm is evaluated and compared to the traditional Least-square Algorithm (LSA).
Electrification of performance vehicles brings several challenges, such as the necessity of high-power sources, which can satisfy the power requirements during acceleration and efficiently retrieve energy during deceleration without performance and life cycle deterioration of such sources. In addition, the limited space under the hood for these vehicles eliminates the possibility of utilizing large volume high-power propulsion machines. This paper proposes a fuzzy logic supervisory wavelet-transform frequency decoupling-based energy management strategy implemented on a new powertrain deploying two propulsion machines rated at different powers with a hybrid battery/ultracapacitor (UC) energy storage system (ESS). The proposed control and energy management strategy guarantees that battery and UC provide the base and transient-free powers, respectively, while state of charge (SOC) of UC is maintained at an optimal value. The torque demand is split among the propulsion machines by solving the formulated unconstrained optimization problem. With the proposed hybrid ESS and energy/power decoupling strategy, power density of the ESS can be increased, vehicle performance can be improved, and battery lifetime can be prolonged.
Electrical vehicles are the really important innovation for improved environmental conditions in the world. Electrical vehicle involves many hardware inside like battery pack. Battery pack has significant role for getting distance and it should be used carefully. Therefore, it is necessary to use additional device for recovering battery from high energy flow. When ultracapacitor technology combined with battery, energy will be used more efficiently and the life of the battery is increased. A solution to the rapid change in power cycle of the vehicle on uneven path is the use of hybrid electric vehicle which gets power from battery and ultracapacitor where battery satisfies energy requirement and ultracapacitor satisfies power requirement. High energy demand of the driver can be fulfilled through the ultracapacitor, which is connected in shunt with battery. Because high energy means high current and ultracapacitor structure is available to ensure this state instead of battery. In this paper, motoring, regenerative braking and several energy management methods are discussed for hybrid electric vehicle with the help of MATLAB. The results of this scheme are being compared with only battery and combination of battery and ultracapacitor. The speed control of DC motor is also compared at different reference speeds and load torque using bi-directional converter and PI controller.
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