Options
‑137‑
5.4.8 Magnetic Ring and Ferrite Clamp
Model
The magnetic ring can be used on the input or output side of the AC drive. Install it as
close to the AC drive as possible. When installed on the input side, the magnetic ring
can suppress the noise in the input power supply system of the drive. When installed
on the output side, the magnetic ring can suppress interference generated by the AC
drive to external devices and reduce the bearing current.
In applications with leakage current and signal cable interference, install a magnetic
ring or a ferrite clamp.
● Amorphous magnetic ring: It features high magnetic conductivity when the
frequency is within 1 MHz and can efficiently suppress interference of the AC drive.
However, it is relatively expensive.
● Ferrite clamp: It features high magnetic conductivity when the frequency is above
1 MHz and can efficiently suppress interference of signal cables and low‑power AC
drives at a low cost.
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