YASKAWA SGM Series User Manual page 90

Application
5.7.1 Noise Control
IMPORTANT
5
J Correct Grounding
Motor Frame Grounding
If the Servomotor is grounded via the equipment frame, switching noise current (Cf dv/dt) will
flow from the SERVOPACK power unit (PWM) through motor stray capacitance (Cf). Always
connect the Servomotor ground terminal (FG) to the SERVOPACK ground terminal
vent adverse effects from switching noise. Be sure to ground the ground terminal.
SERVOPACK SG 0 V
If the reference input line is subjected to noise, ground the SG 0 V line. If the main circuit wiring
for the motor is in a metal conduit, ground the conduit as well as the junction box. Always ground
to one point only.
J Using a Noise Filter
Use an inhibit-type noise filter to block noise from the power supply line. Table 5.3 lists recom-
mended noise filters for each SERVOPACK. Also install a noise filter on the power supply line
for peripheral equipment if needed.
Always observe the installation and wiring instructions shown in Figs. 5.5 to 5.8. Incorrect use of a noise filter
reduces its benefits.
Noise Filters
Table 5.3
SERVOPACK Model SERVOPACK Model
0.5 kW SGDB-05AN
1.0 kW SGDB-10AN
1.5 kW SGDB-15AN
2.0 kW SGDB-20AN
3.0 kW SGDB-30AN
5.0 kW SGDB-50AN
6.0 kW SGDB-60AN
7.5 kW SGDB-75AN
11.0 kW SGDB-1AAN
15.0 kW SGDB-1EAN
* These noise filters other than model FN258-100 are made by Tokin Corp. Tokin
Corp. noise filters are available from Yaskawa. Contact your nearest Yaskawa
sales representative for those noise filters. A noise filter type FN258-100 is made
by SCHAFFNER.
Recommended Noise Filter*
Noise Filter Noise Filter
Connection
Model
LF-310
LF-315
(Correct) (Correct)
LF-320
LF-330
LF-340
(Incorrect) (Incorrect)
LF-350
LF-360
LF-380K
FN258-100
5 -14
to pre-
Specifications
Three-phase 200 VAC, 10 A
Three-phase 200 VAC, 15 A p ,
Three-phase 200 VAC, 20 A
Three-phase 200 VAC, 30 A
Three-phase 200 VAC, 40 A
Three-phase 200 VAC, 50 A
Three-phase 200 VAC, 60 A
Three-phase 200 VAC, 80 A
Three-phase 200 VAC, 100 A