Installation manual

Wiring 08/04 Danaher Motion Kollmorgen
16 M-SS-001-01 Rev. T SERVOSTAR S Installation
The filters called out in the table above are used on a one-to-
one correspondence with the drive. If drives are paralleled off
one filter, it needs to be sized. Drives can be ganged off one
EMI filter as shown in the Sx Filter and Bonding Diagram.
4.4.2 MOTOR LINE FILTERING
Motor filtering may not be necessary for CE compliance of
SERVOSTAR systems. However, this additional filtering increases
the reliability of the system. Poor non-metallic enclosure surfaces
and lengthy, unbonded (or unshielded) motor cables that couple
noise line-to-line (differential) are just some of the factors that lead
to the necessity of motor lead filtering.
Motor lead noise may be either common-mode or differential. The
common-mode conducted currents occur between each motor lead
and ground (line-to-neutral). Differential radiated currents exist from
one motor lead to another (line-to-line). The filtering of the lines
feeding the motor provide additional attenuation of noise currents
that enter surrounding cables and equipment I/O ports in close
proximity.
Differential mode currents commonly occur with lengthy motor
cables. As the cable length increases, so does its capacitance and
its ability to couple noise from line-to-line. While every final system
is different and every application of the product causes a slightly
different emission profile, it may become necessary to use
differential mode chokes to provide additional noise attenuation to
minimize the radiated emissions. The use of a ferrite core (placed
at the drive end) on each motor lead (shown in the diagram below),
attenuates differential mode noise and lower frequency (30-60
MHz) broadband emissions to within specifications. Danaher
Motion recommends a Fair-Rite P/N 2643665702 (or equivalent)
ferrite core. You should wrap each motor lead through the core
several times.
Never wrap a ground lead through a core.
V
From Drive
To Motor
Common Mode
Filtering
From Drive Output
To motor
Differential Mode Filtering