Listado de la categoría: Semiconductores

Introduction

These challenges will have to be mastered, for EVs are the future of transportation: As many as 120 million EVs could be up and running by 2030 [1], and the more EVs are on the road, the greater the collective eet’s appetite for energy. Today charging energy demand amounts to around 20 billion kilowatt-hours, with forecasts calling for it to rise to 100 billion kilowatt-hours by 2025 and 280 billion kilowatt- hours by 2030 [1]. This is a tall order to ll – 2030 is just ten years down the road. More ef cient EV chargers could help meet rising en- ergy demands and deliver more power, faster. This article investigates various system architectures and topologies. It trains the spotlight on the DC-DC converters that are the heart of off-board chargers.

System architectures

There are two main scenarios to ponder, public charging and home charging. Demand for each option varies by region. In view of China’s infrastructural constraints and densely populated cities, public charg- ing is likely to be the far more frequent application in that country. In much of the USA, in contrast, home charging will dominate because so many people live in single-family houses. Then there is the nature of the charging device to contemplate – is it to be a slow charger, a fast charger or a high-power charger?