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Noise generated from the motor is conducted to the main board and other
cables via the motor cable and radiated.
EMI filters are installed on the motor side to suppress the noise.
When EMI filters cannot be installed on the motor side, NFM21C Series
(Chip Solid "EMIFIL®") are installed on the motor cable
connections. However, the noise suppression effect is lower than that
obtained by installing EMI filters on the motor side.
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