Losses In Partial-Load Operation - Siemens SINAMICS S120 Combi Equipment Manual

12.9.4.6

Losses in partial-load operation

Losses in the partial-load range for the S120 Combi
The losses of the S120 Combi in partial-load operation can be calculated using the following
formula:
P = a + b + IN1 x P1 + S1 x I1 + S2 x I2 + S3 x I3 + S4 x I4
V
With:
a: Electronics losses of the S120 Combi
b: Electronics losses of the external fan unit (Article No.: 6SL3161-0EP00-0AA0)
IN1, S1 - S4: Coefficients to calculate the power loss
P1: Infeed power [kW] (LINE X1)
I1: Spindle current [A] (SPINDLE X2)
I2: Current of the 1st feed axis (servo X3)
I3: Current of the 2nd feed axis (servo X4)
I4: Current of the 3rd feed axis (servo X5)
Table 12- 22 Overview of the coefficients to calculate the total power loss P
Power Module
3 axes Power Module
16 kW / 18 A
16 kW / 24 A
20 kW / 30 A
4-axis Power Module
10 kW / 24 A
16 kW / 18 A
16 kW / 24 A
20 kW / 30 A
For a pulse frequency of 4 kHz / 8 kHz
1)
Table 12- 23 Overview of the coefficients to calculate the power loss P
Power Module
3 axes Power Module
16 kW / 18 A
16 kW / 24 A
20 kW / 30 A
4-axis Power Module
10 kW / 24 A
16 kW / 18 A
16 kW / 24 A
20 kW / 30 A
For a pulse frequency of 4 kHz / 8 kHz
1)
SINAMICS S120 Combi
Manual, (GH9), 07/2016, 6SL3097-4AV00-0BP5
a b
36 19.2
36 19.2
36 19.2
38.4 19.2
38.4 19.2
38.4 19.2
38.4 19.2
a b
36 0
36 0
36 0
38.4 0
38.4 0
38.4 0
38.4 0
in the partial-load range
V
IN1 S1
11.05 7.1
11.2 7.2
11.5 7.3
9.1 14.3 / 7.2
1)
11.05 7.1
11.4 7.2
11.7 7.3
in the control cabinet for external cooling
V
IN1 S1
1.95 0.6
2.1 0.6
2.03 0.6
3.3 1.2 / 0.6
1)
1.95 0.6
2.3 0.6
2.23 0.6
Cabinet design and EMC
12.9 Note on control cabinet cooling
S2 S3
6.5 6.5
7.2 7.2
7.2 7.2
7.7 7.7
7.2 6.5
7.2 7.2
7.7 7.2
S2 S3
0.4 0.4
0.4 0.4
0.4 0.4
0.4 0.4
0.4 0.4
0.4 0.4
0.4 0.4
S4
7.7
6.5
7.2
7.2
S4
0.4
0.4
0.4
0.4
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