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How Fast Charging Is Becoming The Leading Technology

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Fast charging is becoming the leading technology used to reenergize electric vehicles in 30 – 60 minutes. With the ownership of EVs doubling each year, the need to implement efficient, fast charging infrastructure is progressively increasing. There are two technical approaches to establish fast charging 1. via a high power, 3-phase AC connection from an AC charging post at the charging station to an on-board high power charger in the EV or 2. via a high power DC connection from a high power DC charger at the charging station directly to the terminals of the battery in the EV. In this section, we will review AC level 2, DC/AC level 3 charging stations to improve our knowledge and the design of our project.
A. Durastation EV Charger
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It supplies 22 Kw at rated working voltage 400Vac and rated current of 32 amps to the vehicle charging system. At those rates, it is capable of fully charging a 24kWh battery in 1 – 2 hours, thus making it considerably faster than 230 Vac as well as Level 1 charging – which uses 120V AC, supplying 1.9kWh at max. current of 16 amps, charging the same battery in 12-18 hours. The higher voltage transfer of AC level 2 charging shortens charging time to roughly 60%. The components used in an AC level 2 charging include:
1. The Electric Vehicle Supply Equipment (EVSE), a general term used for any off-board equipment used for the purpose of delivering energy from the premises wiring to the electric vehicle. The interface between the EVSE and the Utility 's premises wiring may be a direct "hard-wire" or plug and receptacle interface. EVSE includes: Vehicle Charge Cord, Charge stands (public or residential), attachment plugs, power outlets, vehicle connector, miscellaneous infrastructure. The main functions of Electric vehicle supply equipment include: Providing enclosure and method of attachment to AC mains (plug or direct connect), generation of control pilot signal, protection from ground faults, switching power to vehicle based on vehicle command, displaying the presence of AC input.
2. The EV battery located on-board the vehicle.
3. The Inlet, which is considered part of the

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