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3.3.1 Noise supression
The noise generated by the drive may affect the instrument and equipment nearby, and the influence is
determined by various factors, including the noise immunity of the drive control system and the equipment,
the wiring, the installation distance, the grounding method, etc.
Noise type
Fig. 3-22 Schematic diagram for noise classification
Noise transmission path:
Fig. 3-23 Schematic diagram for noise transmission path
Basic policies for noise suppression:
Meter
Drive
Radio device
⑧
⑤
⑥
④
③
③
④
⑦
②
①
⑤
Sensor
Motor
Power supply
of sensor
Phone
ESD induction
noise
Path ○
1
Electromagnetic
Induction noise
Path ○
7
○
8
…
Circuit conduction
noise
Path ○
3
Path ○
2
Noise
Space
transmission noise
…
…
…
…
Path ○
6
…
…
Noise from leakage
current to earth
Transmission noise
from power cable
Radiation noise
of motor cable
Radiation noise
of power cable
Radiation noise
of drive
Path ○
5
Path ○
4
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