VHF rectification for fleet and HGV wireless charging solutions

针对车队和 HGV 无线充电解决方案的 VHF 整改

• 批准号: 76675
• 金额: $ 14.03万
• 依托单位: INDUCTIVE POWER PROJECTION LTD
• 依托单位国家: 英国
• 项目类别: Collaborative R&D
• 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=76675
• 关键词: VHF; rectification; fleet; HGV; wireless

This project aims to develop VHF rectification as a key part of fleet and HGV wireless charging solutions. Inductive Power Projection Ltd is the project lead, and Warwick Manufacturing Group is to provide the academic support.There are wide-ranging socio-political issues concerning road transportation's greenhouse gas emissions, and the UK's strategy is to encourage broad adoption of 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. Aside from its convenience, WPT can significantly downsize the onboard EV battery, and has potential for dynamically charging EVs on the move. Although WPT solutions are being widely explored, charging rates are slow because the power density is low; and while manufacturers claim WPT is market ready, the transmission distance (reach) is poor, and angular misalignment of transmitter/receiver coils regularly results in batteries not receiving full charge. However, the greatest challenge is with heavy-duty vehicles. These require much higher charge-rates and more reach than WPT can currently offer. The only way to solve the charge-rate problem, as well as the reach and misalignment problems, is to significantly increase power density in the magnetic field.Power density can be increased in several ways, but the state-of-the-art copper-coil based WPT systems are already highly optimised. Increased operating frequency will meet the technical challenge but leads to unacceptable power losses and therefore more operating costs. There's no way out for conducting coils. The emerging 2nd-generation frequency standard for automotives is 85kHz, rising from 20kHz with 1st-generation. A "difficult region" exists above 85kHz. Nevertheless, there's a strong business need to significantly increase charging rates, reach and robustness to misalignment tolerance of WPT systems by increasing the power density, at reduced costs. To this end, we offer a completely new capability using VHF technology that transcends the "difficult region" and delivers greatly enhanced power densities.Until now, nobody has been able to formulate high-power VHF-WPT, but rectification is a major barrier and needs to be addressed before the commercial potential of our technology can be realised. Power diodes already used in WPT can't switch fast enough. VHF diodes that can switch fast enough are used in the context of smaller signals where moderate efficiency is tolerable. This project will therefore start to build a new capability for high-powered VHF rectifier solutions for VHF-WPT.

该项目旨在开发VHF纠正，作为车队和HGV无线充电解决方案的关键部分。归纳力投影有限公司是项目负责人，沃里克制造集团（Warwick Manufacturing Group）将提供学术支持。关于道路运输的温室气体排放，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。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电动汽车充电器的缺点，并代表了改善EV操作和用户体验的潜在转化方法。除了方便之外，WPT还可以显着缩小车载电动汽车电池的尺寸，并且有可能动态为电动汽车充电。尽管WPT解决方案正在广泛探索，但由于功率密度较低，充电率很慢。尽管制造商声称WPT已经准备好了，但传输距离（触及到）很差，并且发射器/接收器线圈的角度未对准会导致电池无法获得全额充电。但是，最大的挑战是重型车辆。这些需要比WPT目前所能提供的更高的充电率和更多的覆盖范围。解决电荷率问题以及覆盖范围和未对准问题的唯一方法是显着提高磁场的功率密度。功率密度可以通过多种方式增加，但是最先进的基于铜芯的WPT系统已经高度优化。增加的运营频率将满足技术挑战，但会导致不可接受的功率损失，从而导致更多的运营成本。进行线圈没有办法。汽车的新兴第二代频率标准为85kHz，从20kHz上升为第一代。一个“困难地区”的存在于85kHz以上。然而，强大的业务需要大大提高通过成本降低功率密度来提高功率密度，以提高WPT系统未对准的电荷率和稳健性。为此，我们使用VHF技术提供了一种全新的功能，它超越了“困难地区”并提供了极大的增强功率密度。直到现在，没有人能够制定高功率VHF-WPT，但重新构建是一个主要障碍，需要在我们技术的商业潜力之前实现我们技术的主要障碍。 WPT中已经使用的功率二极管不能足够快地切换。可以在较小效率的较小信号的背景下使用可以快速切换的VHF二极管。因此，该项目将开始为VHF-WPT的高功率VHF整流器解决方案建立新的功能。