This presentation will discuss fault analysis, protection and switch-disconnection in Electric Vehicle Charging Infrastructure from transformer LV side, passing through the AC/DC front-end converter to the DC fast-chargers. This session will analyze the short-circuit and ground fault transient and steady-state condition considering all the contributions coming from the AC grid and the all the… Read more »
Search Results Found For: "bidirectional charging"
Webinar: Designing silicon carbide solutions for EV fast charging
EV fast chargers bypass the vehicle’s on-board chargers (OBCs) for rapid direct battery charging. This allows batteries to be charged in just 30 minutes versus 4+ hours from OBCs. But the demands of these systems are significant. Design goals for fast chargers call for highly efficient power electronics and very high power density that’s possible… Read more »
ORNL demonstrates bi-directional wireless charging on UPS delivery van
Researchers at the DOE’s Oak Ridge National Laboratory (ORNL) recently demonstrated a 20-kilowatt bi-directional wireless charging system installed on a UPS medium-duty, plug-in hybrid electric delivery truck. In the demo, the system transferred power at more than 92% efficiency between the truck and a charging pad across an 11-inch air gap, using two electromagnetic coupling… Read more »
Fermata receives UL certification for vehicle-to-grid EV charging system
Underwriters Laboratories (UL) has announced that Fermata Energy’s bidirectional EV charging system is the first in the world to be certified to a new North American safety standard, UL 9741. The standard covers bidirectional equipment that charges EVs from an electric power system (EPS) and also allows the vehicle to export power to an EPS,… Read more »
Wallbox’s bidirectional DC home charger turns heads at CES
Bidirectional charging encompasses several applications that can be collectively referred to as V2x (vehicle-to-grid, vehicle-to-home, maybe someday vehicle-to-brain). It’s expected to play an important role in tomorrow’s electrified, connected transportation ecosystem, but to date it exists only in pilots, most of them involving commercial fleets. So the new Quasar bidirectional EV charger from Barcelona-based Wallbox,… Read more »
SAE updates J2954 wireless charging standards for EVs up to 11 kW
SAE International has published a second version of Recommended Practice (RP) SAE J2954, its standard for wireless power transfer (WPT) for EVs of up to 11 kW power levels. The RP establishes specifications for interoperability, electromagnetic compatibility, EMF, minimum performance, safety, and testing for wireless charging of light-duty electric and plug-in EVs. SAE is seeking… Read more »
MAHLE licenses wireless EV charging technology from WiTricity
Automotive supplier MAHLE announced that it has licensed magnetic resonance wireless charging technology from WiTricity. “With the acquisition of licenses for WiTricity’s magnetic resonance technology, we’re now progressing to the concrete development stage,” said MAHLE’s Otmar Scharrer. “This will involve our expertise in control electronics, software, and thermal management. In the development of our solution,… Read more »
Duke Energy pilot supports charging infrastructure in South Carolina
Duke Energy has proposed a three-year, $10.4-million pilot initiative to support the installation of charging stations in South Carolina. The pilot is comprised of four programs with the overarching goal of understanding the impact increased EV adoption will have on the electrical grid: Residential EV Charging Program – Provides rebates for up to 400 residential… Read more »
SAE releases new J3068 specification for charging of medium- and heavy-duty EVs
SAE International has published its recommended practice for plug-in charging of heavy-duty EVs. The new J3068 standard allows vehicles to fully utilize three-phase AC power. Presenting a symmetric three-phase load enhances grid stability, especially at high power levels. SAE J3068 standardizes an AC three-phase-capable charging coupler and digital control protocols, offering sufficient power and reliability… Read more »
New study finds V2G discharging harmful to EV batteries
Vehicle-to-grid (V2G) technology is seen as a potentially valuable resource for balancing electrical grids and facilitating the use of renewable energy. However, a new study by a team at the University of Hawaii suggests that the additional cycling to discharge vehicle batteries to the grid is detrimental to battery performance. In “Durability and reliability of… Read more »
