2.23 Decrease Noise
128 YASKAWA ELECTRIC SIEP C710617 05F YASKAWA AC Drive GA700 Technical Manual
■ Prevent Inductive Noise
In addition to installing a noise filter, you can also run all wiring through a grounded metal conduit to decrease
inductive noise occurring at the output side. Put the cables a minimum of 30 cm (11.8 in.) away from the signal
line to prevent induced noise. Ground the cables to metal conduits.
A - Power supply
B - Drive
C - Shielded motor cable
D - Motor
E - Minimum of 30 cm (11.8 in.) apart
F - Controller
G - Signal line
Figure 2.130 Prevent Inductive Noise
■ Decrease Radio Frequency Interference
The drive, input lines, and output lines generate radio frequency interference. Use noise filters on input and output
sides and install the drive in a steel box to decrease radio frequency interference.
Note:
Keep the cable between the drive and motor as short as possible.
A - Steel box
B - Power supply
C - Noise filter
D - Drive
E - Noise filter
F - Shielded motor cable
G - Motor
Figure 2.131 Decrease Radio Frequency Interference
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