The on-site inspection of high-power DC chargers results in new high-current measurement and energy traceability system requirements. This paper studies the technology electric value for automotive chargers, including: (1) method built-in meter shunt charger; (2) precision high current small voltage output technology. designs a 0.1 mA~600 A proposes 0.005 level power system. uncertainty evaluat...

Distribution system operators face a challenging environment marked by increased decentralization, digitalization, and the decarbonization of transport heating sectors. In particular, integration large numbers electric vehicles (EVs) will pose challenges for distribution grid operation planning. However, EVs also open opportunity to offer flexibility services different actors in electricity usi...

The contents of this report reflect the views of the authors, who are responsible for the facts and the accuracy of the information presented herein. This document is disseminated under the sponsorship of the University of Central Florida and the U.S. Department of Transportation’s University Transportation Centers Program in the interest of information exchange. UCF and the U.S. Government ass...

Integrated chargers, where the traction inverter is used as primary charging interface, have emerged a solution for reducing cost and footprint of electric vehicle (EV) charging. This article proposes bidirectional nonisolated integrated charger topology that also provides benefits to motor lifetime reliability through reduction in bearing currents voltages. achieved by adding an EV drive: <inl...

in this paper, a new cascaded multilevel inverter by capability of increasing the number of output voltage levels with reduced number of power switches is proposed. the proposed topology consists of series connection of a number of proposed basic multilevel units. in order to generate all voltage levels at the output, five different algorithms are proposed to determine the magnitude of dc volta...

Class-D full bridge is the most common inverter topology at the primary side for wireless electric vehicles (EVs) charging systems. This study takes a novel topology of a phase-controlled inverter as the power amplifier and puts it in a context of the whole charging system. The proposed inverter topology regulates the charging power through adjusting the phase-shift angle among phases with a co...

Because the charging process for Li+ batteries can take an hour or longer, testing a Li+ battery charger using its natural load (i.e., a battery) is time consuming and inconvenient. This application note presents a simple circuit for simulating the behavior of a Li+ battery, thus providing a more convenient method for testing Li+ battery chargers than using real batteries. A similar version of ...

After a brief historical introduction to the hosting-capacity approach, the hosting capacity is presented in this paper as a tool for distribution-system planning under uncertainty. This tool is illustrated by evaluating the readiness of two low-voltage networks for increasing amounts of customers with PV panels or with EV chargers. Both undervoltage and overvoltage are considered in the studie...

Wireless power transfer is a promising technology to extend the lifetime of, and thus enhance the usability of, the energy-hungry battery-powered devices. It enables energy to be wirelessly transmitted from power chargers to energy receiving devices. Existing studies have mainly focused on maximizing network lifetime, optimizing charging efficiency, minimizing charging delay, etc. Different fro...

Using spatial, longitudinal travel data of 415 vehicles over 3–18 months in the Seattle metropolitan area, this paper estimates the operating costs of plug-in hybrid electric vehicles (PHEVs) of various electric ranges (10, 20, 30, and 40 miles) for 3, 5, and 10 years of payback period, considering different charging infrastructure deployment levels and gasoline prices. Some key findings were m...