The interest in electric trucks is there, but barriers remain before they can become widespread. Range concerns and a lack of infrastructure on the nation’s highways top the list. But one barrier—the need for charging stations, may be on the way to a solution as some EV truck makers contemplate a next generation approach to charging, one that would remove the wire from the equation. Wireless power transfer (WPT) is a no-contact technology that would allow EV trucks to power up when needed without having to find a charging station. While it has yet to take hold, it’s a solution that may not be far off in the future.
WPT works by using magnetic field transmission between a transmitter and receiver pad. These are low- to medium frequency magnetic fields and eliminate some of the potential hazards that come along with wired charging stations, such as tripping hazards and even electrocution. The magnetic fields can pass safely through the human body and other materials like wood, concrete and plastics. WPT does have its own set of risks, however, and these need to be part of the equation as the technology evolves. Wireless charging requires that nothing metallic passes through the transmission fields—something as simple as a coin or a paperclip can cause a risk of burns. Makers are working to offset that hazard, however, with foreign object detection and living object protection. Regardless, with a focus on an electric future, truck makers are looking at every option to ensure an optimal transition when the time comes.
