Rockwell Automation 8720SM High Performance AC Induction Motors - Manual (Page 7)

Publication 8720SM-IN001A-EN-P — February 2003
8720SM High Performance AC Induction Motors 7
with the motor. Sheave or coupling should be balanced with a 1/2
height shaft key.
Preventing Electrical Noise
Use Electromagnetic Compatibility (EMC) techniques to reduce
Electromagnetic Interference (EMI), commonly called noise. Noise
adversely impacts motor performance by inducing stray signals.
Effective techniques to counter EMI include filtering the AC power,
shielding and separating signal carrying lines, and practicing good
grounding techniques.
To help avoid EMI:
•
Filter AC power by using isolated AC power transformers or
properly installed AC line filters.
•
Physically separate signal lines from motor cabling and power
wiring. Do not route signal wires with motor and power wires, or
over the vent openings of servo drives.
•
Ground all equipment using a single-point parallel ground system
that employs ground bus bars or large straps.
Refer to System Design for Control of Electrical Noise Reference
Manual (GMC-RM001x-EN-P) for information on additional electrical
noise reduction techniques.
Building Your 8720SM
Motor Cables Proper cable construction and routing improves system
ElectroMagnetic Compatibility (EMC). Refer to the 8720MC High
Performance Drive Installation Manual (publication
8720MC-IN001x-EN-P) for information regarding cable construction.