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现代电力系统中,变频器、整流器等非线性器件虽然提高了能源效率,但也产生了大量的谐波电流。 这些高频干扰会加速设备老化,导致电缆过热,甚至导致系统瘫痪。 对于抑制谐波,谐波电感起着关键作用,其磁芯类型包括:
铜反应釜
它采用高纯度铜线绕制,利用感性阻抗特性阻断谐波电流流入电网。 铜的低电阻特性减少了自身发热,适合大电流场景(如工业变频柜),并且可以有效滤除5次、7次特征谐波。
固定电感
对于 LL1608-FSL 等表面贴装型号,可通过磁芯层压技术实现精确的电感值(1.2 至 270nH)。 它具有很强的温度稳定性,常被集成到电路板中,用于开关电源等中高频谐波的局部抑制。
谐波电感
对于谐波频谱定制,需要匹配系统的谐振频率。 例如并联电容可以防止谐波放大; 串联在整流器输入端时,直接衰减谐波电流,将电网畸变率降低到国家标准GB/T14549限定值以内
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