Rockwell Automation 1398-DDM-xxx USE MNL/ULTRA 200 DIG.SERVO.DR User Manual
Page 284
Publication 1398-5.0 – October 1998
E-4
Electromagnetic Compatibility Guidelines for Machine Design
The only reasonable filtering at the drive output terminals is the use of
inductance. Capacitors would slow the output switching and
deteriorate the drive performance. A common mode choke, as is used
in the ULTRA 200 Series, can be used to reduce the HF voltage at the
drive output. This will reduce emission coupling through the drive
back to the AC line. However, the motor cable still carries a large HF
voltage and current. Therefore, it is very important to segregate the
motor cable from the AC power cable. More information on cable
shielding and segregation is contained in the section on shielding.
Table E.1:
AC Line Filter Installation
Intro
AC
LINE
RADIATED
EMI
DRIVE
RADIATED
EMI
FILTER
CONDUCTED EMI
CONDUCTED EMI
POOR
AC
LINE
DRIVE
RADIATED
EMI
FILTER
CONDUCTED EMI
GOOD
!
Intro
ATTENTION: Before applying power, the filter must be
safety grounded. Without a proper ground, current leakage
could build to a hazardous level.