Siemens SINAMICS S120

Cabinet design and EMC Booksize
12.12 Power losses of the components
Booksize Power Units
768 Manual, (GH2), 07/2016, 6SL3097-4AC00-0BP8
12.12.10
Typical power losses for Motor Modules
The information on the power losses in the previous chapters are maximum values, which
occur in the most unfavorable case. For typical applications, the losses are lower.
The following applies as typical application:
● Maximum motor cable length, 30 m
● 4 kHz pulse frequency
● DC link voltage 540 V - 600 V
The power loss for typical applications can be calculated using the following formula:
P
V
[W] = a + S
1
• (I
1
+ I
2
) + S
2
• (I
1
2
+ I
2
2
)
a
Electronics losses of the Motor Module
S
1
, S
2
Coefficients to calcu
late power loss
I
1
Current (arithmetic mean value) of the 1st axis
I
2
Current (arithmetic mean value) of the 2nd axis
Overview of required coefficients
Table 12- 43 Coefficients to calculate the power loss in the control cabinet for internally cooled Mo-
tor Modules for typical applications
Motor Module
a [W]
S
1
[W/A]
S
2
[W/A
2
]
Single Motor Module 3 A
14
3.29
0.205
Single Motor Module 5 A
14
3.29
0.205
Single Motor Module 9 A
14
3.29
0.205
Single Motor Module 18 A
14
3.29
0.205
Single Motor Module 30 A
20
4,71
0,113
Single Motor Module 45 A
25
5,50
0,054
Single Motor Module 60 A
25
5,50
0,054
Single Motor Module 85 A
36
6,11
0,030
Single Motor Module 132 A
150
6,01
0,018
Single Motor Module 200 A
150
6,01
0,017
Double Motor Module 3 A
19
5,20
0,200
Double Motor Module 5 A
19
5,20
0,200
Double Motor Module 9 A
19
5,18
0,247
Double Motor Module 18 A 22 5,57 0,091