Wireless power transfer (WPT) is emerging as the preeminent way to charge electric vehicles, but there appears to be no fair way to measure the power transfer. In this article, Faraday coil transfer-power measurement (FC-TPM) is presented. FC-TPM employs non-contact, open-circuited sense coils to measure the electromagnetic field from WPT and calculates the real power propagating through the air gap between the transmitter and receiver coils. What is measured is the real electromagnetic power, representing the pure dispensation of energy that unambiguously demarcates the losses on either side. FC-TPM was demonstrated to be 0.1% accurate in hardware over an Rx coil misalignment of up to 10 cm using a 1-kW WPT system. Fair metering incentivizes businesses and individuals to make choices that conserve energy and advance technology by providing more information and by properly assigning the financial loss. This article is accompanied by a video highlighting the essential contributions of this article.

中文翻译：

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使用非接触式方法进行传输功率测量，以公平、准确地计量电动汽车中的无线电力传输


无线电力传输 (WPT) 正在成为电动汽车充电的卓越方式，但似乎没有公平的方法来测量电力传输。本文介绍了法拉第线圈传输功率测量 (FC-TPM)。 FC-TPM 采用非接触式开路感应线圈来测量 WPT 产生的电磁场，并计算通过发射器和接收器线圈之间的气隙传播的有功功率。测量的是真实的电磁功率，代表纯粹的能量分配，明确划分了两侧的损耗。事实证明，使用 1 kW WPT 系统时，FC-TPM 在硬件中的精确度为 0.1%，接收线圈错位高达 10 厘米。公平计量通过提供更多信息和正确分配经济损失，激励企业和个人做出节约能源和先进技术的选择。本文附有一个视频，重点介绍了本文的重要贡献。