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通过注入合成与同步信号主动抵消电机逆变器输入端的周期性共模EMI

Active Cancellation of Periodic CM EMI at the Input of a Motor Inverter by Injecting Synthesized and Synchronized Signals (S3-AEF)

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中文摘要

本文提出了一种主动电磁干扰(EMI)抵消技术,旨在减小无源滤波器的体积。针对稳态运行下由周期性控制信号产生的周期性干扰,利用傅里叶理论将其分解为一系列正弦波,并通过注入合成与同步的抵消信号进行抑制。

English Abstract

Active electromagnetic interferences (EMI) cancellation is a promising solution to reduce the size of passive filters. Power electronic systems may generate periodic disturbances if they are controlled by periodic signals in steady-state operation. Periodic disturbances can be represented by a set of sine waves, according to the Fourier theory, and can be suppressed by an appropriate set of cancel...
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SunView 深度解读

该技术对阳光电源的组串式光伏逆变器及PowerTitan/PowerStack储能变流器具有重要参考价值。随着功率密度的不断提升,EMI滤波器的体积已成为限制整机小型化的关键瓶颈。通过引入S3-AEF主动抵消技术,可以在保证电磁兼容性(EMC)合规的前提下,显著减小磁性元件的体积与重量,从而降低成本并提升产品功率密度。建议研发团队在下一代高频化逆变器设计中评估该方案,特别是在应对复杂电网环境下的共模噪声抑制方面,以提升产品的市场竞争力。