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In Wireless Sensor Networks (WSNs), to supply energy to the sensor nodes, wireless energy transfer (WET) is a promising technique. One of the most efficient procedures to transfer energy to the sensor nodes consists in using a sharp wireless energy beam from the base station to each node at a time. A natural fundamental question is what is the lifetime ensured by WET and how to maximize the network...
Wireless Sensor Networks (WSNs) are becoming a key enabling technology for Internet of Things (IoT) by virtue of providing a highly unstructured cloud of wireless devices. Despite these advances, the current Internet architecture is not able to cater to the high volume of new traffic patterns delivered by these smart sensing devices. In this context, Software Defined Networking (SDN) has emerged as...
A dual-mode Single-Input-Dual-Output converter with fully digital time-based Maximum-Power-Point-Tracking is presented to efficiently harvest indoor solar energy. The converter uses only three power switches to minimize the chip area and reduce the switching power loss, and dual-mode to accommodate the power imbalance between the Photovoltaic (PV) cell supply and the load requirement. Under sufficient...
In recent years, due to the widespread use of EV, Vehicle to grid (V2G) has received wide attention. This paper considers power systems and provides an overview of some V2G issues. Two technical issues are detailed: bi-directional charger and charging/discharging strategy. Those two technical issues stems from two great problems of the electric vehicle (EV) integration into the power system: harmonics...
Multilevel inverters are used in several applications such as renewable sources, industrial drives, laminators, blowers, fans, and conveyors based power generation. The proposed multilevel inverter with boost converter plays a major role to minimize power demand and scarcity also provides desired Peak voltage. It synthesizes the desired ac output waveform from dc sources. This project focuses on reducing...
Wireless Sensor Network (WSN) is composed of high density sensor nodes randomly deployed to monitor a specific phenomenon. Due to high density the data sensed by these nodes is highly redundant and spatially correlated. Sensor node is usually battery operated. Hence, power conservation takes on additional importance. Traditional deployment for WSN is self organizing neighboring discovery on randomly...
Wireless Sensor Network is the set of homogeneous or heterogeneous sensor nodes; those can sense the data from different sensing areas of the network. There are different routing protocols exist for find the efficient route to transmits the data from source to destination. The performance of the routing protocols depends of the various factors in the network like packets size, types of signals, movement...
A bidirectional inverter is proposed based on a two phase Neutral Point Clamping type 2 (NPC2) topology combined with a grounded buck boost inverter. The proposed system can work without the need of a transformer thanks to the combination of the topology, switching pattern and inductive filter that prevents the discharge of parasitic stray capacitance to ground. The inverter has the ability to operate...
The last decade can be considered an embryonic period for seafloor networks with the introduction of sizeable networks off the West Coast of Canada, off the West Coast of the United States and in the Mediterranean Sea, as well as smaller networks spread throughout the world's oceans. The amount of data currently available is expected to pale in comparison to future prospects as the infrastructure...
This paper focuses on the hybrid energy storage system (HESS) utilizing and interfacing multiple energy storage system. The topology of the proposed multiport isolated bidirectional dc-dc converter (BDC) is the triple active full bridge (TAB) topology that interfaces battery as primary energy storage and supercapacitor as auxillary energy storage. Battery is the most matured technology in energy storage...
Multi-port converters have fewer components count and less conversion stage than the traditional power processing solution which adopts several independent two-port converters. This paper emphasis on the use of a single power processing stage to interface multiple power inputs integrates power conversion for a hybrid power source. The classification of various multiport dc-dc converters topologies...
A novel multiple-input converter with bidirectional power flow capability is proposed in this paper. By using bidirectional power flow approch, not only the buck mode but also the boost mode of operation can be possible. Moreover, by establishing single power converter for different sources we can reduce the components and so the size of overall system and cost can be reduced. In this topology independent...
This paper presents a reduced active switch count push-pull based DC fast charger for electric vehicles. The proposed system takes a 3-phase utility line voltage and produces a high frequency (HF) AC link employing only two active switches. A 5-limb HF transformer, in zig-zag connection, is employed for isolation. The primary side of the transformer is connected to a clamp circuit and two active semiconductor...
In this paper, a novel cell voltage equalizer using a series LC resonant converter topology is proposed for a series connection of energy storage devices, namely battery, or supercapacitor cells. The objective of the target project is to design an active voltage equalization circuit that is low cost, small in size and achieves a short voltage equalization time. The target application is electric vehicles...
The proliferation of electric vehicles (EV) creates a need for fast battery chargers. In order for systems of supercapacitors (SC) to reach adequate energy density levels to replace battery packs, fast SC chargers will also be required. However, when a fully discharged supercapacitor pack is charged from an ideal voltage source, the five-time-constant charging bottleneck comes into play. This issue...
In plug-in electric vehicles (PEVs), an isolated dc/dc converter with high step-down ratio is required to supply power to the onboard appliances. The wide battery pack voltage range on the input side brings significant challenges to the design and optimization of this dc/dc converter. This study comprehensively compares LLC resonant topology, series-resonant topology with delay-time control (DTC-SRC),...
This paper proposes a hierarchical battery balancing architecture for the series connected lithium-ion batteries. The battery cells are grouped into different packs and the bottom layer is the Adjacent Cell-to-Cell structure consisting of the packs. The top layer is connected to different packs and can deliver the energy from one pack to any other pack bi-directionally, leading to high flexibility...
The single phase multilevel inverter with a battery balance unit strategy is presented. Every input of inverters which are in system is directly connected to battery. And the output of all batteries that is unification of all batteries voltage can controlled battery voltage to fulfil battery balancing intent. In this topology the inverter is design as well as fulfilled to operate as a battery balancing...
In photovoltaic (PV) applications, power electronic converters play a vital role in transferring power from source to load. In general, operating voltages of PV arrays are low. To interface them with high voltage DC bus, a high voltage conversion system is needed which is provided by high gain topologies. Moreover, to increase the power density, efficiency of conversion and decrease cost, recent developments...
This paper proposes a four-switch single-phase single-stage isolated AC-DC converter with high efficiency for battery charging applications. By combining one LLC resonant unit and one T-type three-level unit with switch multiplexing technique, a single-stage single-phase isolated LLC resonant (SSPLLC) converter is proposed to achieve AC-DC conversion. In comparison with conventional two-stage isolated...
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