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.

道路交通温室气体排放存在广泛的社会政治问题，英国的战略是鼓励广泛采用电动汽车（EV）。无电缆无线功率传输 (WPT)（也称为感应功率传输）可以潜在地克服有线电动汽车充电器的缺点，并代表了一种改善电动汽车操作和用户体验的潜在变革方法，特别是在机会充电方面，例如装货区的一辆货车。除了便利性之外，WPT 还可以显着缩小车载电动汽车电池的尺寸，并具有在行驶中为电动汽车动态充电的潜力。WPT 存在重大障碍。电力传输效率高度依赖于车辆上的发射器线圈（通常埋在地下）和接收器线圈的精确对准。重型电动汽车还需要比 WPT 目前所能提供的更高的充电率。提高 WPT 系统的工作频率可以提高功率密度，解决这两个问题，并使 WPT 更具全面吸引力。最先进的系统在 85 kHz 下工作有多种原因，包括铁氧体磁芯的使用、集肤效应和可用的电力电子设备。Inducing Power Projection Ltd 最近发明并保护了一种创建 VHF 磁场的新方法针对不同的应用。我们没有频率限制，因此在 VHF 频段（大致定义为 30MHz-300MHz）内运行。在咨询了先进推进中心后，我们意识到 VHF-WPT 对于电动汽车充电的潜在价值，并且在与 Warwick Materials Group 进行技术同行评审后，很明显，通过使用 VHF，我们可以避免高于 85kHz 的“困难频率区域”。根据我们目前的了解，我们的 VHF-WPT 充电方法可以以非常高的效率投射超过 400 kW 每个模块的功率，轻松达到 800 毫米（无线部分> 99%）；与当前最先进的 WPT 系统相比，50 kW/模块被认为是优秀的，并且远大的目标是达到 300 毫米。已经确定了 500 毫米横向不对中的严格目标，即使没有大型车辆侧接收器线圈，我们也可以超过该目标。然而，VHF-WPT 的可行性需要进行研究和测试，以便更好地了解其局限性，而这个项目就是利用我们已经拥有的设备以及我们之前工作中开发的技术来做到这一点的。我们有一个巨大的市场机会。解决方案，但我们的两个研究组织合作伙伴将解决两个已确定的技术差距。