Motion between a magnet and conductor induces currents that resist movement.
What it is
Eddy-Current Damping happens when a magnet moves near a conductive, non-magnetic metal such as copper or aluminum. The motion induces small circulating electric currents, called eddy currents, in the metal, and those currents create a magnetic field that resists the movement. No power source is needed; the effect comes from the motion itself.
How it feels in your EDC
Eddy-current damping gives a smooth, silky resistance, as if the part is moving through something thick, with no contact or friction between the parts. The faster you move it, the stronger the resistance. It feels very different from a click or snap: calm, even and quiet.
What to look for
Look at which conductor and magnets the brand uses, since material, magnet strength and gap affect how strong the damping feels. A marketing name with words like “current” does not by itself mean eddy-current damping, so check the brand’s description of the mechanism. Keep strong magnets away from cards, phones and medical implants.
是什么
涡流阻尼（Eddy-Current Damping）发生在磁铁靠近紫铜或铝等导电、非磁性金属运动时。运动会在金属中感应出细小的环形电流，即涡流，而涡流产生的磁场会阻碍这一运动。它不需要任何电源，效果完全来自运动本身。
上手感受
涡流阻尼带来顺滑如丝的阻力，仿佛零件在浓稠的介质中移动，而零件之间没有接触或摩擦。移动越快，阻力越强。它和咔哒或吸合的感觉截然不同：沉静、均匀、安静。
选购要点
看品牌使用的导体和磁铁，材质、磁铁强度和间隙都会影响阻尼的强弱。宣传名称里带有“电流”等字眼，并不代表就是涡流阻尼，请以品牌对机构的说明为准。强磁铁要远离银行卡、手机和医疗植入物。
