FujiFilm FRENIC5000G11S Series, Техническая информация

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Chapter 8
Appendix 1. Advantageous Use of Inverters (with regard to Electrical Noise)
8-3
8
1.2.2 Types of noise
The noise generated in the inverter is propagated through the main circuit wiring to the power supply and the motor, and effects
a wide range from the power supply transformer to the motor.
The various propagation routes are shown in Fig. 2, but these are roughly classified into 3 routes of conduction noise, induction
noise and radiation noise.
(1) Conduction noise
Conduction noise is generated in the inverter, propagates through the conductor and power supply, and effects peripheral
devices of the inverter (Fig. 3) Some conduction noise
q
propagates through the main circuit. If the ground lines are con-
nected with a common connection, there is conduction through route
w
. There is also noise
e
through the signal line and
shielded wire.
Fig. 1 Outline of inverter configuration
Fig. 2 Noise propagation routes
Fig. 3 Conduction noise
Inverter part Converter part
Power supply
Control circuit
DC/DC
Con-
verter
C
C
M
Power supply
transformer
Inverter
Amplifier
Electronic
device
ELCB
M
Radio
Machine
Sensor
1
2
4
5
3
Power
supply
Inverter
Electronic
device
M
Sensor Signal line
1
2
3
Chapter8-1(P1˜10).p65
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