In a world striving to reduce its carbon footprint, electric vehicles (EVs) and e-mobility represent the future of transportation. To ensure the cost-effectiveness of battery-powered vehicles, it is crucial that electric vehicle chargers are highly efficient and economical. While advancements in topologies and semiconductor technologies have improved power conversion stages at multi kW levels, AC/DC auxiliary supplies must also meet the requirements of EV chargers in terms of efficiency and value.
Charging wall boxes and charging stations, which are often installed in overvoltage category three (OVC III) environments, face challenges such as significant dips, surges, and transients caused by lightning strikes. It is imperative that power supplies for these applications can withstand such conditions. Furthermore, temperature variations can be extreme, and the available AC supply voltage may be three-phase 480VAC or 277VAC. In addition to these external factors, auxiliary AC/DC modules must reliably operate alongside switching regulators and DC/DC converters that provide internal voltage conversion and isolation.
The reliability and performance of AC/DC modules in this demanding environment are crucial for the smooth operation of EV charging systems. Efficient power supplies and supporting components play a vital role in ensuring the sustainability and viability of e-mobility solutions.