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In an electric vehicle (EV) or hybrid electric vehicle (HEV) the control of motor drive under aberrant conditions plays a dominant role. One of it is the stator inter turn faults in the motor. It creates huge abnormality in the machine speed and torque pulsations which finally makes the operation of a drive to standstill. This paper mainly describes an algorithm to control the drive in fault-tolerant...
Due to the inconvenience and safety issues caused by exposed plugs and damaged cables, wireless charging of electric vehicles (EV) has gained popularity. Inductive wireless power transfer has been successfully applied up to 30kW involving the charging of EV batteries. The capacitive wireless power transfer system is new for the EV charging application, but can address the transfer of power across...
Traditional speech separation systems enhance the magnitude response of noisy speech. Recent studies, however, have shown that perceptual speech quality is significantly improved when magnitude and phase are both enhanced. These studies, however, have not determined if phase enhancement is beneficial in environments that contain reverberation as well as noise. In this paper, we present an approach...
Fast Charging (FC) stations for Electric Vehicles (EV) are gaining popularity as it has become evident that all modes of transportation will be electrified in the not so distant future. The lack of range in the currently available electric vehicles have also fueled the need for these quick charging stations. The typical power levels of these FC stations are 50kW and above, these are generally an off-board...
Solar energy is a promising alternative energy source for a sustainable pollution-free future. Due to the requirements of high efficiency, reliability, power density and low cost, transformerless PV inverters can be utilized in a grid-connected solar energy system. However, this suffers from no galvanic isolation and leakage currents through the stray capacitances between the PV array and the ground...
Switched Reluctance Motor (SRM) presents simple construction, high starting torque, wide speed range, high efficiency and high reliability which are appropriate for an Electric Vehicle (EV) drive system. However, SRM has some issues such as high torque ripple, acoustic noise, vibration due to non-linearities, and require a position sensor for control. The purpose of this paper is to compare two different...
The use of renewable sources of energy to charge electric vehicle (EV) batteries have drawn tremendous interest at present. The need for charging of EVs at convenient locations such as residential areas and semi commercial locations such as office parking lots and shopping malls have generated great interest in the use of solar energy for charging of the EV batteries where there is space restrictions...
The position of a magnetic null in the coupling profile of a charging pad decides the operating area over which power transfer can take place. For circular charging pads, employing an Archimedean spiral, a magnetic null occurs at a misalignment distance equal to about 40% of the pad diameter (or 70% of the coil's diameter) irrespective of the coil separation. However, this is true only for identically...
In the development stage of electric vehicle drive, simulation plays a vital role. It's a powerful tool which allows the developer to investigate various control strategies and test hardware systems in harmless work environment. The software simulations platform does have constraints. In that the complex mathematical operations take longer time to solve and eventually increases the overall simulation...
The future of transportation is inevitably all-electric, and its driving forces are electric energy storage devices. This is particularly true for urban mass transit modes, such as trains, trams, buses, and public utility trucks. Ultracapacitors (UCs) are gaining popularity in transportation storage applications to supply peak power and power transient demands, especially in mass transit electrification...
Over the last two decades, motor drives comprising of power electronic converters and advanced electric machines have deeply penetrated into the transportation sector, where new technologies are explored, in order to electrify various modes of transportation systems. Electric transportation puts much greater demand on power electronics than conventional fossil fuel powered automobiles. In many cases...
In the past decade wireless power transfer with the help of magnetic field has been most popular. Contactless capacitive power transfer (CPT) system is an alternate form of wireless power transfer that is currently gaining popularly. However, capacitive power transfer systems are predominantly utilized in low power and small air gap applications applications due to low efficiency and high voltage...
Use of renewable sources of energy for charging of electric vehicle(EV) batteries have generated tremendous interest. The use of off-board DC chargers to reduce the weight and increase space inside an electric vehicles has been an important area of interest. Harvesting solar energy to charge electric vehicle batteries can result in large inefficient systems when multiple power conversion stages are...
Contactless Capacitive Power Transfer (CPT) is one of the emerging fields in the area of wireless power transfer. The system is fairly analogues to the inductive power transfer system. The CPT systems was primarily used for low power and small distance applications due to the development of unsafe voltages across the capacitive interface. However, the use of new compensation networks have enabled...
In electromagnetic resonance based wireless inductive power transfer (WIPT) system, voltage gain is determined by the coil inductances and the coupling coefficient of the power transmitting coils and frequency of operation. In this paper, voltage gain of an electromagnetic resonance based series-parallel compensated WIPT system is analyzed. Different control schemes are discussed to achieve high efficiency...
In this paper a comparative study of primary side control strategies for a series-series compensated inductive power transfer (IPT) system has been presented. Since output power of an IPT system is directly affected by deviation from perfect tuning condition, only narrow frequency-range control techniques has been considered for the comparison purposes. For this purpose Symmetrical voltage cancellation,...
One of the major issues in a single phase inverter topology is the 120Hz ripple which needs large decoupling capacitors. Big bulky electrolytic capacitors can be an issue in applications where compact size and high power density are requirements such as solar converter chargers. In z source inverter systems, the design of the impedance network is critical. In single phase z source inverter systems,...
In this paper small-signal model of a symmetrical clamped mode controlled series-series compensated inductive power transfer (IPT) system has been derived using the extended describing function (EDF) method. The derived model has duty cycle, input voltage and switching frequency as control variables and an output voltage as an output variable. A voltage controller has been designed for symmetrical...
This paper provides an approach to use novel ferrite core geometries and winding configurations to improve effectiveness for electric vehicle wireless charging systems using magnetic resonant inductive power transfer (RIPT). Using ferrite magnetic cores improves the efficiency of IPT and magnetic resonance based IPT systems, and can reduce unwanted stray magnetic radiation in addition to improving...
This paper is focused on the analysis and design of the capacitive plates of the capacitive wireless power transfer system. The coupling structure resembles a loosely coupled capacitor. The electric field coupling interface is the most vital part of the wireless technology. The coupling interface determines the capacitance of the coupling capacitors, maximum power transfer, frequency and overall efficiency...
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