Electric Charge Apparatuses

Charging Device - an overview | ScienceDirect Topics

www.sciencedirect.com

The infrastructures supplying electric energy for the recharging of PEVs are charging stations. These stations can be categorized into three types, namely residential, public and ultra-fast charging stations. The residential charging stations, installed at household areas, enable PEVs to be charged during night when the energy tariff is low and the peak hour demand can be avoided. An important issue of EVCS is the electrical structure design. Generally, the structure of EVCS can either be based on an AC micro-grid system or based on a DC micro-grid system [49], as shown in Fig. 4. In a DC micro-grid type of EV charging station, several DC chargers are connected to a common DC bus, and a high power AC/DC converter is used as the interlinking power converter between the DC system and the main AC grid. Charging devices provide the link between electricity grid and EVs by converting AC power into DC power, which can charge a battery. They can be on-board or off-board, depending on the type of charging. Generally, most PEVs have electric storage devices, and charging technologies are important on the way to commercializing the PEVs so that the range anxiety of the customers can be alleviated. There are two charging methods including inductive charging and conductive charging.

Electrostatic generator - Wikipedia

en.wikipedia.org

Oleg D. Jefimenko, "Electrostatic Motors: Their History, Types, and Principles of Operation". Electret Scientific, Star City, 1973. G. W. Francis (author) and Oleg D. Jefimenko (editor), "Electrostatic Experiments: An Encyclopedia of Early Electrostatic Experiments, Demonstrations, Devices, and Apparatus". His instrument was described as "an instrument which by turning a winch produces the two states of electricity without friction or communication with the earth". (Phil. Trans., 1788, p. 403) Nicholson later described a "spinning condenser" apparatus, as a better instrument for measurements. This apparatus was reinvented several times, by C. F. Varley, that patented a high power version in 1860, by Lord Kelvin (the "replenisher") 1868, and by A. D. Moore (the "dirod"), more recently. Lord Kelvin also devised a combined influence machine and electromagnetic machine, commonly called a mouse mill, for electrifying the ink in connection with his siphon recorder, and a water-drop electrostatic generator (1867), which he called the "water-dropping condenser". Francis Ronalds automated the generation process in 1816 by adapting a pendulum bob as one of the plates, driven by clockwork or a steam engine – he created the device to power his electric telegraph. Others, including T. Cavallo (who developed the "Cavallo multiplier", a charge multiplier using simple addition, in 1795), John Read, Charles Bernard Desormes, and Jean Nicolas Pierre Hachette, developed further various forms of rotating doublers. In 1798, the German scientist and preacher Gottlieb Christoph Bohnenberger, described the Bohnenberger machine, along with several other doublers of Bennet and Nicholson types in a book. A Pidgeon machine possesses fixed electrostatic inductors arranged in a manner that increases the electrostatic induction effect (and its electrical output is at least double that of typical machines of this type [except when it is overtaxed]). The essential features of the Pidgeon machine are, one, the combination of the rotating support and the fixed support for inducing charge, and, two, the improved insulation of all parts of the machine (but more especially of the generator's carriers).

TOPIC: ELECTRIC CHARGES→ Production, Types, Distribution and ...

fctemis.org

TOPIC: ELECTRIC CHARGES→ Production, Types, Distribution and Storage ... Electrostatics is the study of charges at rest. It is a type of electricity that does not move from · one point to another in the substance in which it is produced. ... There are two types of charges – positive and negative charges. The law states that like charges repel, unlike charges attract. ... Conductors are materials that allow electrons to pass through them easily. Insulators are materials that do not allow electrons to pass through them easily. Examples · of insulators are plastic, polythene, Bakelite, ebonite, paper, dry hair, silk, oils, glass, sulphur ... Experimental works have shown that charges are distributed where there is a sharp curve. area of a charged surface is called surface density. Fig. 2.3 Charge Distribution is greater at the edge (sharp edge) ... The electrophorus is a device for transferring and storing charges.

Charging station - Wikipedia

en.wikipedia.org

NEC-1999 also defined the term "electric vehicle supply equipment" as the entire unit "installed specifically for the purpose of delivering energy from the premises wiring to the electric vehicle", including "conductors ... electric vehicle connectors, attachment plugs, and all other fittings, devices, power outlets, or apparatuses". Tesla, Inc. uses the term charging station as the location of a group of chargers, and the term connector for an individual EVSE. A charging station, also known as a charge point, chargepoint, or electric vehicle supply equipment (EVSE), is a power supply device that supplies electrical power for recharging the onboard battery packs of plug-in electric vehicles (including battery electric vehicles, electric trucks, electric buses, neighborhood electric vehicles, and plug-in hybrid vehicles). There are two main types of EV chargers: alternating current (AC) charging stations and direct current (DC) charging stations. The Society of Automotive Engineers (SAE International) defines the general physical, electrical, communication, and performance requirements for EV charging systems used in North America, as part of standard SAE J1772, initially developed in 2001. SAE J1772 defines four levels of charging, two levels each for AC and DC supplies; the differences between levels are based upon the power distribution type, standards and maximum power. Charge rates vary from residential rates for electricity to many times higher. The premium is usually for the convenience of faster charging. Vehicles can typically be charged without the owner present, allowing the owner to partake in other activities. Sites include malls, freeway rest areas, transit stations, and government offices. Typically, AC Type 1/Type 2 plugs are used. Additional standards released by SAE for charging include SAE J3068 (three-phase AC charging, using the Type 2 connector defined in IEC 62196-2) and SAE J3105 (automated connection of DC charging devices). In 2003, the International Electrotechnical Commission (IEC) adopted a majority of the SAE J1772 standard under IEC 62196-1 for international implementation.

Charging Equipment - an overview | ScienceDirect Topics

www.sciencedirect.com

In order to ensure that the routine tests specified for subsequent units are satisfactory and can be performed without serious problems arising, they are carried out on the type-tested unit. Any difficulties arising can then be resolved before the further production units become available, resulting in a saving of time and space in a test bay. On completion of erection, each charger is subjected to a series of tests designed to ensure that it has been correctly assembled, that the correct components have been used and that the equipment functions correctly. These tests comprise: ... Testing of electronic equipment in accordance with routine tests listed in CEGB General Specification for Electronic Equipment, EES 1980. Battery swapping station (BSS) also known as battery switching station is a place where electric vehicle owners can rapidly exchange their empty battery with a fully charged one (see Fig. 17). This concept has been proposed as a new method to handle the obstacles regarding to the aforementioned traditional charging methods [272,273]. There are currently three battery swap types on the industry: chassis power swap, sub-box power swap, and side power swap [274]. The general outline of battery swap systems is given by the IEC 62840-1,-2 [275,276], and NB/T 33006-2013, NB/T 33020-2015 with a maximal voltage up to 1 000 V AC and up to 1 500 V DC. The Electric Power Research Institute (EPRI), Society of Automotive Engineers (SAE), and the International Electrotechnical Commission (IEC) have a substantial role to play in categorizing charging modes and levels in each country as well as managing the differences in safety standards. Various charging types are outlined in established standards, including alternating current (AC) Level-1, alternating current (AC) Level-2, and direct current fast charging (DCFC). According to a study published in Schroeder and Traber (2012), residential charging infrastructure is the most common method for charging EVs, with Level-1 and Level-2 as the most popular There are many types of charging techniques, as shown in Table 1. Table 1. An overview of charging techniques. Level 1 (L1) charge cables are included with every EV. The device is universally compatible, does not require installation fees, and is pluggable into any standard grounding 120-V outlet. Depending on the price of electricity and the efficiency rating of your EV, L1 charging can cost anywhere from two to six dollars per mile.

Charger Types and Speeds | US Department of Transportation

www.transportation.gov

If you are deaf, hard of hearing, or have a speech disability, please dial 7-1-1 to access telecommunications relay services. EVs can be charged using electric vehicle service equipment (EVSE) operating at different charging speeds. Level 2 equipment offers higher-rate AC charging through 240V (in residential applications) or 208V (in commercial applications) electrical service, and is common for home, workplace, and public charging. Level 2 chargers (left) are common in home, workplace, and public settings and can charge a BEV from empty in 4-10 hours. Direct current fast chargers (right) are common as public chargers and along highway corridors and can charge a BEV to 80 percent in under an hour. These new standards aim to ensure that charging is a predictable and reliable experience for EV drivers. This includes ensuring that drivers can easily find a charger, do not need multiple apps and/or accounts to charge, chargers work when drivers need them to, and are designed to be compatible in the future with forward-looking charging capabilities.