According to a recent report from the Physics Organization Network, scientists at the University of British Columbia (UBC) in Canada have made significant progress in the field of wireless charging for electric vehicles. They’ve developed a unique technology that uses a "long-distance magnetic transfer device" to charge electric vehicles without any physical connection. This innovation was successfully demonstrated on campus service vehicles, marking an important step towards widespread adoption of electric vehicles across Canada.
Wireless charging has long been a popular technological solution for everything from smartphones to electric cars. However, concerns persist regarding the potentially harmful effects of high-power, high-frequency electromagnetic fields commonly associated with this method. To address these issues, Ron Whitehead, a physicist at UBC, and his team have come up with a novel approach. Their technology operates at a frequency 100 times lower than traditional wireless charging systems, significantly reducing exposure to electric fields. Instead of relying on radio waves, their solution employs a "long-distance magnetic transfer device." This device consists of a rotating magnetic base located at the charging station and another similar base installed in the vehicle itself. When the car parks over the charging station, the magnetic base in the station initiates a remote rotation, generating electricity to charge the vehicle's battery.
The UBC researchers installed four wireless charging stations on their campus and integrated this new technology into several service vehicles for testing. Results showed that the system is approximately 90% more efficient than conventional cable charging. A full charge takes around four hours, while an already charged vehicle can maintain its charge for up to eight hours.
David Woodson, the director of infrastructure operations at the university, highlighted one of the biggest advantages of this system: it eliminates the hassle of connecting power cords, especially in adverse weather or crowded situations. Since the introduction of the wireless charging stations, feedback from drivers has been overwhelmingly positive. Simply parking the car in the designated spot is enough to activate the automatic charging process.
Interestingly, the original concept behind this project was quite different. The team initially aimed to create a magnetically driven charging system for smaller medical devices like pacemakers. However, scaling up this technology led to the current large-scale system, which has received support from the National Research Council of Canada’s Innovation Fund. The campus serves as a real-world testing ground, providing valuable data for ongoing research and future improvements. In fact, the team has already submitted a patent application through the University Industry Liaison Office. This breakthrough could pave the way for more convenient and environmentally friendly electric vehicle charging solutions. (By Feng Weidong)
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