动态无线电力传输中脉冲密度调制接收电流控制效率评价

2021 IEEE PELS Workshop on Emerging Technologies: Wireless Power Transfer (WoW) Pub Date : 2021-06-01 DOI:10.1109/WoW51332.2021.9462879

Sakahisa Nagai, Toshiyuki Fujita, H. Fujimoto, S. Tsuge, Toshiya Hashimoto

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引用次数: 1

摘要

电动汽车动态无线电力传输(DWPT)技术是一种能够提高电动汽车行驶里程和减少电池容量的创新技术。接收电流控制是防止电池过充的重要手段。本文主要研究了采用有源整流器的接收电流控制。脉冲密度调制(PDM)与脉冲宽度调制相比，在整流器的开关损耗方面是有效的。在以前的关于PDM的论文中，对平稳WPT系统的操作进行了评估。本文利用DWPT高速旋转试验台，对PDM接收电流控制的传输能量效率进行了评估。并对集中式PDM (CPDM)和分布式PDM (DPDM)进行了实验比较。结果表明，尽管在40km /h时互感发生了动态变化，但CPDM和DPDM的电流控制性能是相同的。DPDM的能量效率比CPDM的能量效率高3.3-7.9%，因为它可以减少滤波器电流和滤波器电感的损耗。因此，DPDM对于DWPT系统的接收电流控制是有效的。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Efficiency Evaluation of Receiving Current Control Using Pulse Density Modulation for Dynamic Wireless Power Transfer

Dynamic wireless power transfer (DWPT) for electric vehicles (EVs) is an innovative technique that enables the EVs to enhance the driving range and reduce the capacity of the battery. The receiving current control is important to prevent the battery from overcharging. In this paper, the receiving current control using an active rectifier is focused on. Pulse density modulation (PDM) is effective in terms of the switching loss in the rectifier compared with pulse width modulation. In the previous papers regarding to the PDM, the operation is evaluated in stationary WPT systems. In this paper, the transmission energy efficiency of the receiving current control with the PDM is evaluated using a high-speed rotational testbench for the DWPT. In addition, centralized PDM (CPDM) and distributed PDM (DPDM) are experimentally compared. As a result, it was confirmed that the current control performances using the CPDM and DPDM are the same in spite of the mutual inductance dynamic change at 40 km/h. The energy efficiency of the DPDM was 3.3–7.9% higher compared with one of the CPDM because it can reduce the filter current and loss in the filter inductance. Therefore, the DPDM is effective for the receiving current control of the DWPT system.

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来源期刊

2021 IEEE PELS Workshop on Emerging Technologies: Wireless Power Transfer (WoW)

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