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Wireless charging of electric or hybrid vehicles is a modern technology based on power electronics with high prospects of extension both due to the advantages it offers against the plug-in charging and as an integral part of the technology for achieving autonomous vehicles, a highly topical issue. Although the theory of these wireless systems is well known, at practical achievement one should take...
Wireless Sensor Network (WSN) is an integration of simple sensing, processing, storage and communication technology into cheap miniature sized devices. Distributed WSN is used for ambient intelligence, where tiny senor nodes sense, process and communicate signals to the base station (BS) for smart decision making. Nodes are deployed randomly in any unattended area for monitoring any physical attribute...
This paper presents a new control technique for battery charging using AC-DC Active Front End (AFE) PWM rectifier for UPS application. The topology is based on sensorless adaptive control of charging current by varying the DC voltage level of AFE rectifier. System mathematical modelling via dq axes transformation is prepared for the derivation of the control law. Further the derived control algorithm...
This paper proposes a single stage multi-port converter and control based on Flyback Principle for solar PV module integrated micro-inverter application. This configuration can be used for grid connected as well as standalone applications with battery backup. The topology provides galvanic isolation between solar PV, battery, and the load and achieves high voltage gain. Moreover, the battery does...
Low Voltage Direct Current (LVDC) has attained extensive significance and substantial impact on the global community in the recent past, as it has the wider scope for generation and distribution of electricity and superior efficiency of DC equipment. This paper presents an LVDC architecture to investigate the power and control architecture to evolve the specifications, to implement LVDC for residential...
A fault tolerant three phase five-level inverter configuration for the application of islanded photovoltaic (PV) systems is proposed. The fault tolerant five-level inverter configuration is achieved by stacking a two-level inverter, a three-level neutral point clamped inverter along with three bidirectional switches. This configuration is fed with two DC sources. The proposed configuration shows fault...
This paper studies and explores feasibility of wireless inductive power transfer (IPT) systems using current source inverter (CSI) topology for electric vehicle battery charging applications. Possible IPT systems with CSI topology includes current-fed push-pull, half-bridge and full-bridge converters. Also the possible compensation or resonant tank network at transmitter side is parallel LC or CCL...
This paper presents a three-level ZSI for photovoltaic (PV) application to achieve single stage buck-boost (as per the solar variation). A single LC impedance network is used between DC voltage source (including PV array and a bidirectional buck-boost system) and neutral-point clamped (NPC) inverter. Alternative phase opposition and disposition (APOD) modulation technique with proper triplen offset...
AC and DC sub-grids in a hybrid microgrid are connected through interlinking AC-DC bi-directional converter. The storage was connected to either of the AC or DC sub-grids. Because of storage system integration, it requires a more number of power conversions and device count. So, power quality and overall efficiency of the hybrid microgrid system is decrease. On this intend, this paper proposes a new...
A bidirectional flyback boost/buck integrated converter with high conversion ratio is designed and implemented in this paper. When batteries release energy to DC bus, this converter functions like flyback and boost integrated converter, with outputs of flyback and boost converter cascoded to obtain high voltage gain. Energy in leakage inductor is recycled through boost converter, neglecting the need...
The charge unbalancing decreases the total storage capacity and the entire life cycle of batteries. In order to prevent the charge differences among cells, cell balancing system or charge equalization have been proposed. This paper proposes an active balancing system based on switched-capacitor charge equalization for series-connected batteries. This circuit topology allows two series-connected cells...
An EV (Electric Vehicle) is becoming more popular these days in transport sector due to its environment friendly operation as well as availability at reduced cost. The battery charging process is the prominent matter of concern in an EV because of power quality issues in the input current drawn by the charger. These issues are generated mainly because of the nonlinear nature of the diode bridge rectifier...
Conventional PFC circuits in EV (Electric Vehicle) battery chargers have the efficiency limitation due to high conduction loss associated with a diode bridge rectifier (DBR) at the input. To mitigate this issue, a bridgeless single ended primary inductance converter (SEPIC) with improved power quality is presented in this paper. The input current drawn by the charger shows a unity power factor operation...
Electric Vehicle (EV) has come into attention within automotive industry over the years. The feature of EV that uses electric as primary source provides benefits to customers. As electrical system is the major appeal of an EV, the present study focuses on the charging system where it involves DC-DC converter for high voltage charger. The phase-shifted-full bridge and LLC are used in high power application...
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...
This paper proposes a new power management strategy based on pq-Theory for fuel cell and electric vehicle applications. Using a modular cascaded converter topology, more than one power source could be combined with capacitors to supply active and reactive power in an efficient manner to the electric motor. The control strategy to separate mean and oscillating active power and reactive power, as well...
This paper reviews the existing structures for converter stages in renewable energy and motor drive systems that offer high voltage gain at the input of an inverter. The inverter may also connect the DC supply to the utility grid. For traction motor drives in vehicle and rail transport and in high-frequency transformer connected grids, bi-directional power flow capability is also required. Cascaded...
Due to their properties such as high energy density, lithium-ion battery packs are more and more widespread for many kinds of applications. Although a classical Battery Management System (BMS) can improve the performance and safety of a battery pack, it cannot deal with issues related to aging and cell faults. This paper presents a fault-response approach for battery packs operating at the cell level...
Dynamic wireless power transfer is a practical method to solve electric vehicle range anxiety and reduce the cost of on-board batteries. However, the power cannot be transferred between different coupler structures. In this paper, DDQ coupler is adopted in primary side for delivering power to any secondary coupler. A novel multiple legs inverter topology and reflected load identification method is...
As off-board battery charger for electric vehicles (EVs) has little limitations of weight, volume and power capacity, this paper introduces a new architecture for off-board battery charger. It is based on multi-pulse flexible-topology thyristor rectifier, which operates in series or parallel mode via flexible-topology switching, according to battery voltage. By flexible-topology operation, the proposed...
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