DC−bus operation
Application examples
Example 1
7
361
EDS94SPP101 EN 10.2
7.7 Application examples
7.7.1 Example 1 − supply module with multi−axis controllers
Assumptions:
ƒ 400 V, 3 AC/PE
ƒ 7 axes in 2 power categories
ƒ no particular dynamic performance requirements
The following motors (Mx) are selected:
Motor type Rated power Efficiency Rated current
Index [kW] [A]
M1 ... M5 MCS14H15 2.5 0.92 6.6
M6 ... M7 MCS09F38 1.2 0.90 2.5
For the above motor data, the following controllers (Gx) are selected:
Controller Rated power Typical motor
power
Power loss P
l
Rated current
Index [kW] [kW] [kW] [A]
G1 ... G5 E94AMxE0074 4.8 3.0 0.19 7.0
G6 ... G7 E94AMxE0034 1.7 0.75 0.12 2.5
The power required by the drive system is determined with the below formula ( 7.5.5):
P
DCtotal
= 5 * (2.5 kW / 0.92 + 0.19 kW) + 2 * (1.2 kW / 0.90 + 0.12 kW)
P
DCtotal
= 17.4 kW
The calculated power requirement is used to select the supply module:
Supply module (+ mains filter) Rated power (P
DC100%
)
Index [kW]
V1 E94APNE0364
+ E94AZMP0294
17.5
Note: Only the supply module with mains filter reaches the required power.
Checking the power efficiency:
With 17.5 kW > 17.4 kW, P
DC100%
> P
DCtotal
.
Select cables and fuses in accordance with the Technical data.
L2L1
L3
MMM
3
AC
M
...
V1
G1 Gx
Fig. 7−4 Basic circuit diagram
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