11. OPTIONS AND PERIPHERAL EQUIPMENT
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(d) Line noise filter (FR-BSF01/FR-BLF of Mitsubishi Electric Corparation)
This filter is effective in suppressing noises radiated from the power supply side and output side
of the driver and also in suppressing high-frequency leakage current (0-phase current). It
especially affects the noises between 0.5 MHz and 5 MHz band.
Use the line noise filters for lines of the main power supply (L1,
L2, and L3) and of the servo motor power (U, V, and W). Pass
each of the wires through the line noise filter an equal number of
times in the same direction. For the main power supply, the effect
of the filter rises as the number of passes increases, but
generally four passes would be appropriate. For the servo motor
power lines, passes must be four times or less. Do not pass the
grounding wire through the filter. or the effect of the filter will drop.
Wind the wires by passing through the filter to satisfy the required
number of passes as shown in Example 1. If the wires are too
thick to wind, use two or more filters to have the required number
of passes as shown in Example 2.
Place the line noise filters as close to the driver as possible for
their best performance.
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