VHF Wireless Power Transfer

VHF 无线功率传输

• 批准号: 53637
• 金额: $ 19.44万
• 依托单位: INDUCTIVE POWER PROJECTION LTD
• 依托单位国家: 英国
• 项目类别: Study
• 财政年份: 2020
• 资助国家: 英国
• 起止时间: 2020 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=53637
• 关键词: VHF; Wireless; Power; Transfer

There are wide sociopolitical issues concerning road transportation's greenhouse gas emissions, and the UK's strategy is to encourage wide adoption of electric vehicles (EVs). Cable-free wireless power transfer (WPT) (also known as inductive power transfer) can potentially overcome the drawbacks of wired EV chargers, and represents a potentially transformational method for improving the EV operation and user experience, especially with opportunity charging, for example for a van in a loading bay. Aside from its convenience, WPT can enable significant downsizing of the onboard EV battery, and has the potential for dynamically charging EVs on the move.Significant snags for WPT exist. The power transfer efficiency is highly reliant on precise alignment of the transmitter coils (usually buried in the ground) and the receiver coils on the vehicle. Heavy-duty EVs also require much higher charge rates than WPT can currently offer.Increasing the operating frequency of WPT systems increases the power density, solving both these issues and making WPT far more attractive all-round. State-of-the-art systems work at 85 kHz for a host of reasons including the use of ferrite cores, the skin effect, and available power electronics.Inductive Power Projection Ltd have recently invented and protected a new way to create VHF magnetic fields for different applications. We're not frequency-limited and so operate in the VHF band (loosely defined as 30MHz-300MHz). After consulting with the Advanced Propulsion Centre, we realised the potential value for VHF-WPT for charging EVs, and following a technical peer review with Warwick Materials Group, it became clear that by using VHF we avoid a "difficult frequency region" above 85kHz.With our present understanding, our VHF-WPT charging method can project in excess of 400 kW per module, easily to 800 mm at very high efficiencies (\> 99% for the wireless part); this compares with current state-of-the-art WPT systems where 50 kW/module is considered excellent, and an ambitious target for reach is 300 mm. A tough target of 500 mm lateral misalignment has been identified, which we can exceed even without a large vehicle-side receiver coil. However, the feasibility of VHF-WPT needs to be studied and tested in order to better understand the limitations, and this project does that, using the equipment we already own, and techniques developed during our previous work.There's a significant market opportunity for our solution, but two identified technology gaps will be worked on by our two research organisation partners.

关于道路运输的温室气体排放，社会政治问题广泛，英国的战略是鼓励广泛采用电动汽车（EV）。无电缆的无线功率传输（WPT）（也称为电感功率传输）可以潜在地克服有线EV充电器的缺点，并代表了一种可能改善EV操作和用户体验的潜在转化方法，尤其是在加载舱中的货车。除了方便之外，WPT还可以对车载电动汽车电池电池进行大量缩小尺寸，并有可能在移动中动态充电电动汽车。存在着重要的WPT障碍。功率传输效率高度依赖于发射器线圈（通常埋在地面上）和接收器线圈上的精确比对。重型电动汽车还需要比WPT目前所能提供的高电费要高得多。介绍WPT系统的工作频率增加了功率密度，解决这两个问题并使WPT的全方位更具吸引力。最先进的系统在85 kHz工作，原因有很多，包括使用铁氧体内核，皮肤效应和可用的电力电子产品。感应功率投影有限公司最近发明并保护了一种新的方法来为不同应用创建VHF磁场。我们不是频率限制的，因此在VHF频段（松散定义为30MHz-300MHz）中运行。 After consulting with the Advanced Propulsion Centre, we realised the potential value for VHF-WPT for charging EVs, and following a technical peer review with Warwick Materials Group, it became clear that by using VHF we avoid a "difficult frequency region" above 85kHz.With our present understanding, our VHF-WPT charging method can project in excess of 400 kW per module, easily to 800 mm at very high efficiencies (\> 99% for the无线部分）；这与当前最新的WPT系统相比，其中50 kW/模块被认为是极好的，雄心勃勃的目标是300毫米。已经确定了500毫米横向错位的艰难目标，即使没有大型车辆接收器线圈，我们也可以超越。但是，为了更好地了解局限性，需要研究和测试VHF-WPT的可行性，并且该项目使用我们已经拥有的设备以及在我们以前的工作中开发的技术来做到这一点。我们的解决方案是一个很大的市场机会，但是我们的两个研究差距将由我们的两个研究组织组成。