All kinds of mobile phone chargers in the actual use process, due to poor quality products or improper will cause safety accidents, causing great harm, so this paper has practical significance study risk and accident causes chargers. First all, through failure insulating materials between conductive parts charger, substandard artificial plug-ins production components, waste circuit boards board...

We have developed a new isolated AC/DC converter for electric vehicle on-board chargers. It consists of an AC/DC converter with Gradationally Controlled Voltage Inverter (GCVI AC/DC converter) and an isolated Zero-Voltage-Switching (ZVS) DC/DC converter, each of which is optimally controlled to convert in a highly efficient means. As a result, the new on-board charger has achieved a power conve...

The increase of electric vehicle (EV) battery chargers connected to electric networks could lead to future harmonic problems in power systems. These loads are nonlinear devices that inject harmonic currents and pollute network voltages. Thus, battery charger modeling must be studied in detail to determine their harmonic emissions and prevent future problems. This paper investigates EV battery c...

A deep review of the state electromobility in urban public transport by bus was conducted from all different charging strategies, types chargers, and e-buses with a general overview SWOT analysis. five case studies worldwide also real study data shown depth: EMT Madrid, where chargers systems were developed single operation center. Total Cost Ownership (TCO) literature for as compared technolog...

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...

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...

Due to their flexibility, Electric Vehicles (EVs) constitute an important asset for the integration of renewable energy sources in Smart Grid. In particular, they should have a dual role: as controllable load and mobile generator with low inertia. To perform these tasks, chargers must provide electronics power flow from grid vehicle vice versa. This bidirectionality can also be implemented wire...

Using natural hemp fibers to reinforce the tensile characteristics of polymer matrix composites is investigated in this article. The fibers were applied to the epoxy matrix in unidirectional and hybrid tissue forms. After preparation of standard tensile stress test specimens via manual layup, the standard tensile test was done.  Young’s modulus, ultimate tensile stress, and the amount of absorb...

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 ...