Siemens SINAMICS S120 - Comparison of the Properties of the Motor-Side Reactors and Filters

Fundamental Principles and System Description
Engineering Information
SINAMICS Engineering Manual – November 2015
Ó Siemens AG
157/528
1.10.4 Comparison of the properties of the motor-side reactors and filters
The table below provides an overview of the key properties of the motor-side reactors and filters.
Converter output:
Without
reactor or filter
With
motor reactor
With
dv/dt filter
With
sine-wave filter
Voltage rate-or-rise dv/dt
at the motor terminals
High
(see chart
on next page)
Medium
(see chart
on next page)
Low
(see chart
on next page)
Very low
(see chart
on next page)
Peak voltage V
PP
at the motor terminals
High
(see chart
on next page)
Relatively high
(see chart
on next page)
Low
(see chart
on next page)
Very low
(see chart
on next page)
Permitted
pulse modulation systems
No restrictions No restrictions No restrictions
Space vector
modulation SVM only
Permitted
pulse frequencies
No restrictions ≤ 2x factory setting ≤ 2x factory setting
Exactly 2x factory
setting
Permitted
output frequencies
No restrictions ≤ 150 Hz ≤ 150 Hz ≤ 150 Hz
Permitted
control modes
Servo control
Vector control
V/f control
Servo control
Vector control
V/f control
Servo control
Vector control
V/f control
Vector control
V/f control
Control quality and
dynamic response
Very high High High Low
Stray losses
in reactor or filter
relative to converter
losses in rated operation
– Approx. 10 % Approx. 10 – 15 % Approx. 10 – 15 %
Stray losses in motor
due to converter supply
relative to rated operation
Approx. 10 % Approx. 10 % Approx. 10 % Very low
Reduction in motor noise
caused by converter
No Minimal Minimal Significant
Reduction in bearing currents
in the motor
No Medium Yes Yes
Max. cable length shielded
Max. cable length unshielded
300 m
450 m
300 m
450 m
100 m or 300 m
150 m or 450 m
300 m
450 m
Volume – Low Medium Medium
Price – Low Medium to high High
Comparison of the key propertiesof motor-side reactors and filters