在使用精确平衡技术的电动汽车高功率感应功率传输系统中分析和减少常态噪声
Ying Mei1, Wanying Weng1, Jiande Wu2
1College of Electrical Engineering, Zhejiang University, Hangzhou, 310027, China.
Scientific reports
|December 7, 2025
概括
本研究引入了一种新的平衡技术,以减少电动汽车感应功率传输系统中的常态噪声. 该方法有效地减轻了无需额外硬件的电磁干扰,提高了系统兼容性.
科学领域:
- 电气工程 电气工程
- 电磁兼容性 电磁兼容性 电磁兼容性
- 电力电子 电力电子 电力电子
背景情况:
- 电动汽车 (EV) 感应功率传输 (IPT) 系统中的屏蔽金属减少了电磁场 (EMF) 辐射,但引入了常态 (CM) 噪声,影响了电磁兼容性 (EMC).
- 减轻CM噪声的现有方法往往需要额外的硬件或在广泛的频率范围内效率较低.
研究的目的:
- 为了研究IPT线圈中CM阻抗的不对称性.
- 为IPT系统开发一种新的CM噪声模型.
- 提出和验证一个有效的平衡技术来减少CM噪声,而无需额外的硬件.
主要方法:
- 开发了一个分布式电路模型来表示IPT线圈中的迷路容量.
- 进行了全面的分析,以确定CM阻抗,并得出完整的CM噪声模型.
- 设计和实施了一种利用对称补偿电路拓学的平衡技术.
- 一个11千瓦的IPT原型与一个LCC补偿网络被建造和实验测试.
主要成果:
- 拟议的分布式电路模型准确地反映了迷路容量和CM阻抗.
- 新的CM噪声模型为有效的降噪提供了基础.
- 实验结果显示,低频率 (150 kHz5 MHz) 的导电CM噪声减少了5 dB.
- 在高频率 (5MHz30MHz) 实现了显著的13dB的CM噪声降低.
结论:
- 开发的平衡技术有效地减少了IPT系统中的CM噪声,确保符合CISPR22等标准.
- 拟议的方法提供了一种硬件效率高的解决方案,用于提高电动汽车充电中的EMC性能.
- 实验验证证证实了该技术在广泛频谱的有效性.
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