Feature: Displays
Displays are one of the key parameters for high-performance EV chargers
By Paul Hooper, Sales and Marketing Director, Display Technology W
ith countries around the world introducing mandates to cut the number
of diesel and petrol cars – including the UK government’s scheduled ban on the sale of new petrol and diesel cars from 2030 – we are looking toward a new dominant car technology, that of the electric vehicle (EV). Electric cars are by no means a new
invention, they’ve existed as long as their petroleum-fuelled counterparts. However, their recent explosion has been largely associated with two companies, Tesla and Nissan, with models like the Nissan Leaf and Tesla Model 3. Today there are some 245,000 pure
EVs on the UK’s roads, along with 515,000 plug-in hybrids; this growth is expected to accelerate as EVs become more aff ordable and charging-station networks expand. Consulting fi rm Deloitte forecasts that over 25.3 million pure electric vehicles will be sold by 2030, which will undoubtedly place pressure on the countries’ charging networks.
26 March 2022
www.electronicsworld.co.uk
Power T e fi rst hurdle system designers must overcome when developing and deploying public EV chargers is their huge power requirement. Whilst at-home chargers can plug straight into domestic mains to trickle- charge EVs overnight, for electric vehicles to be a viable alternative to petrol-powered cars, their batteries must charge quickly. T ere are three main types of EV
charging stations: AC Levels 1 and 2 and DC fast charging. AC Level 1 chargers, also known as trickle- or opportunity chargers, provide 120V charging to deliver outputs to 1.9kW. T ese are typically line-cord chargers sold with plug-in electric cars, and are not commonly found in public use. T ey are cheap to run and are a viable option for businesses like motels or parking lots to off er on their premises. For L1 stations, industrial power supply
manufacturer Mornsun recommends its LD05-R2 series of power modules, allowing for compact and reliable EV charging. AC Level 2 chargers provide 240V
charging, delivering from 3kW to 19kW, covering some 18-28 miles per hour of charging. L2 charging stations take an average of eight hours to charge an EV. To power
these chargers, Mornsun recommends its LS10 series of effi cient AC-DC converters. Alternative power supplies include Artesyn’s LCM3000 series, off ering 3kW of output power, with simple fi rmware options for battery-charging applications. Although currently L2 chargers are the
most prevalent type, they do very little to advance the rollout of electric cars, mainly because of their eight-hour charging time. T is is where the next level charger comes in. Colloquially known as a “Level 3”
charging stations, Direct Current Fast Chargers (DCFCs) are designed to charge an EV battery to 90% in as little as 20 minutes, delivering up to 350kW. T ese are the types of chargers that
are removing barriers to entry for EV consumers and are hugely popular, but are also far more expensive to run and maintain. Due to their high power draw, DCFCs are only viable for high-volume industrial and commercial locations, like busy petrol stations adjacent to major motorways, for example. Other power supply solutions for EV
chargers include the Artesyn iHP, whose intuitive digital control allows for seamless management of large DCFC fl eets.
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