Siemens SINAMICS G130 Engineering Manual page 107

Partial load efficiency of SINAMICS S150 converters
The following diagrams show the efficiency at partial load for SINAMICS S150 converters for constant-torque drives.
Basis of the calculations is a typical value for the efficiency of the converter at full load of 96 %. The representation of
the efficiency is done in two different ways. The first representation shows the efficiency in dependency on the
converter output frequency for different values of the output current. The second representation shows the efficiency
in dependency on the converter output current for different values of the output frequency.
Fig. 1a) shows the converter efficiency for constant-torque drives in dependency on the converter output frequency
f /f , which is in proportion to the motor speed n/n
Out Rated
output current I /I , which is in proportion to the motor torque M/M
Out Rated
Fig. 1a)
Efficiency of SINAMICS S150 converters for constant-torque drives
in dependency on the converter output frequency (specified in %)
Fig. 1b) shows the converter efficiency for constant-torque drives in dependency of the converter output current
I /I , which is in proportion to the motor torque M/M
Out Rated
output frequency f /f
Out Rated
Fig. 1b)
Efficiency of SINAMICS S150 converters for constant-torque drives
in dependency on the converter output current (specified in %)
Fundamental Principles and System Description
, which is in proportion to the motor speed n/n
Engineering Information
. The representation is done for different values of the
Rated
.
Rated
. The representation is done for different values of the
Rated
.
Rated
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