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6 Infeed Modules
6.7 DC link options
Engineering
information
6-188
The energy for dynamic operations is obtained as follows:
The following applies for braking or accelerating operations within time t
drive from one speed/velocity to another:
w = ½ S P S t
For rotary drives with
S (n
M
– n
Mot
Mot max
P =
9 550
For linear drives with
S (V
P = F
– V
Mot
Mot max
Mot min
with η
G:
η
= η
Braking
G
M
η
Acceleration
= 1/(η
G
w [Ws]
Energy
P [kW]
Motor power
t
[s]
Time of the operation
V
M
[Nm]
Max. motor torque when braking or accelerating
mot
F
[N]
Max. motor force when braking or accelerating
mot
n
[RPM]
Max. speed at the start or the end of the operation
mot max
n
[RPM]
Min. speed at the start or end of the operation
mot min
v
[m/s]
Max. velocity at the start or end of the operation
mot max
v
[m/s]
Min. velocity at the start or end of the operation
mot min
η
Total efficiency
G
η
Motor efficiency
M
η
Inverter efficiency
INV
Torque M and force F depend on the moved masses, the load, and the accel-
eration in the system.
If precise data is not available for the previously specified factors, then generally
rated/nominal data is used instead.
The central capacitor module should preferably be located at the end of the
system group. The connection is made using the DC link busbar.
SIMODRIVE 611 Configuration Manual (PJU) – 02/2012 Edition
V
)
Mot min
S η
G
S η
) S 10
–3
G
S η
INV
S η
)
M
INV
© Siemens AG 2012 All Rights Reserved
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