INDUSTRY RADAR | 工商動態 saturation, reducing core loss, increasing power density, and enhancing system flexibility and feasibility. A new four-quadrant switching optimisation scheme is proposed for highpower new semiconductor silicon carbide (SiC) device power converters to achieve zero-voltage switching for nearly all power devices. Laboratory measurements show that the DC system efficiency reaches 96%, with AC transmission efficiency between the magnetic coupling mechanisms as high as 97%. Together with the University of Cambridge in the UK, this project marks the world’s first breakthrough in developing high-power and efficient nanocrystalline wireless charging technology. Aligned with recommendation three of Hong Kong’s innovation and technology development blueprint – to strengthen support for strategic industries and promote the research, development, and production of new energy automobile parts – this technology will further advance smart wireless charging devices. It provides a solid foundation for the development of Hong Kong’s new energy automobile parts industry and contributes significantly to green transportation, helping Hong Kong meet its climate change obligations and improve air quality. This technology has the potential to transform how we charge and use electric vehicles, offering numerous practical applications that enhance convenience, efficiency, and sustainability. One of the most straightforward applications is in public charging stations. EV WPT systems can be installed in parking lots, shopping centres, and street parking, allowing EVs to charge wirelessly while parked. This eliminates the hassle of plugging in and out, making the charging process more seamless for users. Home installations of EV WPT systems can provide a convenient way for owners to charge their vehicles overnight without the need for cables. Driveway or garage-based wireless charging pads can ensure the vehicle is always ready with minimal user intervention. Furthermore, dynamic or in-motion wireless charging involves embedding WPT systems into roadways. This allows EVs to charge while driving, extending their range and reducing the need for large onboard batteries. Dynamic charging can be particularly beneficial for long-haul trucks and public transport systems, such as buses, which can charge while picking up passengers. Additionally, as autonomous vehicles become more common, EV WPT can play a crucial role in their operation. Wireless charging systems can be integrated into autonomous vehicle infrastructures, ensuring these vehicles can efficiently recharge without human intervention, which is critical for truly autonomous operation. By integrating EV WPT technology into various aspects of daily life and infrastructure, we can significantly improve the adoption and practicality of electric vehicles, contributing to a more sustainable and efficient transportation ecosystem. Currently, the technical parameters and advantages of the R&D team’s work are comparable to those of major electric vehicle manufacturers, including Tesla, BMW, Porsche, Toyota, and SAIC, who are actively working on implementing efficient wireless electric vehicle charging devices. The success of this project will provide valuable insights for designing next-generation wireless charging systems for advanced modern electric vehicles, promoting the use of electric vehicles as green transportation. This initiative will attract more electric vehicle users and accelerate Hong Kong’s progress towards achieving zero vehicle emissions by 2050. 磁飽和度，減少了鐵芯損耗，增加了功率密度，並提 高了系統靈活性和可行性。針對高功率新型半導體 碳化矽（SiC）器件功率變換器，提出了一種新的四 象限開關優化方案，以實現幾乎所有功率器件的零 電壓開關。實驗室測量顯示，系統效率達到96%，磁 耦合機制之間的傳輸效率高達97%。該項目與英國 劍橋大學合作，標誌著全球首個高功率高效納米晶 無線充電技術的突破。 這技術與香港創新科技發展藍圖中的第三項建議— 「加強對戰略性產業的支持，促進新能源汽車零部 件的研發和生產」相一致，將進一步推動智能無線 充電設備的發展，為香港新能源汽車零部件產業的 發展奠定堅實基礎，並對綠色交通做出重大貢獻， 幫助香港履行應對氣候變化的義務，改善空氣質 量。這項技術有潛力改變我們為電動車充電和使用 電動車的方式，並提供眾多可提高便利性、效率和可 持續性的實際應用。最直接的應用之一是公共充電 站。EV WPT系統可以安裝在停車場、購物中心和路 邊停車位，讓電動車在停車時無線充電，免除插拔充 電線纜的麻煩，使充電過程更加流暢。家用EV WPT 系統的安裝可以為車主提供一種方便的方式，在夜 間為車輛充電而無需使用電纜。車道或車庫的無線 充電墊可以確保車輛隨時準備就緒，減少用戶干預。 此外，動態或行駛中的無線充電涉及在道路上嵌入 WPT系統。這允許電動車在駕駛時充電，延長其續 航里程，減少對大電池的需求。動態充電特別有利 於長途卡車和公共交通系統（如巴士），這些系統可 以在乘客上車時充電。此外，隨著自動駕駛車輛變得 越來越普及，EV WPT技術在其運行中可以發揮關鍵 作用。無線充電系統可以集成到自動駕駛車輛的基 礎設施中，確保這些車輛在無需人為干預的情況下 高效充電，實現真正的自動無人駕駛操作。通過將 EV WPT技術融入日常生活和基礎設施的各個方面， 我們可以顯著提高電動車的採用率和實用性，促進 更可持續和高效的交通生態系統。 目前，研發團隊的技術參數和優勢可媲美主要電動 車製造商，包括特斯拉、寶馬、保時捷、豐田和上汽 等，這些企業正在積極實施高效的無線電動車充電 設備。該項目的成功將為設計下一代現代電動車的 無線充電系統提供寶貴的意見，推動電動車作為綠 色交通工具的使用。這一倡議將吸引更多電動車用 戶，加速香港在2050年前實現零車輛排放的進程。 Novel Nanocrystalline magnetic arrangement 新型納米晶磁芯磁路設計 Nanocrystalline wireless EV charger coupler design 城大納米晶無線充電器磁耦合器設計 34 | 8-10/2024
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