Siemens Simovert Masterdrives Compendium page 96

05.2003
Siemens AG 6SE7087-6QX70 (Version AD)
SIMOVERT MASTERDRIVES
Instructions for Design of Drives in Conformance with EMC Regulations
Mains
1
Filter
Line reactor
Frequency
converter
Machine
M
3~
Fig. 3-7 Block diagram of a drive system
The purpose of a frequency converter is to drive a motor. The
frequency converter, the relevant open-loop control and sensor system
are accommodated in a cabinet. The emitted noise has to be limited at
the mains connection point and therefore radio interference
suppression filters and line reactors are installed in the cabinet.
Assuming that all requirements are met at Point
that electromagnetic compatibility exists?
This question cannot just be answered with "yes" because EMC has to
be reliably ensured inside the cabinet as well. It is possible that the
control system produces electromagnetic influences at interfaces
and , and the sensor system at interfaces
Therefore, a radio interference suppression filter by itself cannot ensure
EMC!
See the following sections.
Compendium Motion Control
Cabinet
Control
e.g. Simatic
2
Sensors
(e.g. temp.,
position,
pressure)
3
Mechanical system
4
- can it be supposed
and .
3-9