6-2
CZM auxiliary capacitance module
ECODRIVE DKC02.1 Drive Controller
DOK-ECODRV-DKC02.1****-PRJ2-EN-P
DKC01.-40-7 with AC motor MKD 071 B with the following data:
Designation
Value
Rotor inertia of the MKD 071 B
J
M
= 0.00087 kgm²
Maximum effective motor speed
n
NUTZ
= 3200 min-1
Load inertia of the application
J
LAST
= 0.00261 kgm²
Cycle time
tZ =0.8 s
Line voltage
U
N
= 400 V
Fig. 6-4: Technical data for application example DKC02.1 with MKD
tz
t1
t2
t3
n
P
R
W
ROT
PRD =
WROT
tz
DG0202D4.fh5
t
t1
= Accel time in seconds
t2
= Delay time in seconds
t3
= Dwell time in seconds
tz
= Cycle time in seconds
W
ROT
= Rotary energy in Ws
n
= RPM in min
-1
= Peak feedback output in kW
= Average of the regenerated power
ir a during cycle (continous
regenerated power)
P
P
RS
RD
Fig. 6-5: Calculating the regenerative power in the processing cycle
This produces the following results:
W
ROT
= 195 Ws
W
ZW, DKC+CZM
= 209 Ws
This indicates that the condition
W
ROT
≤
W
ZW, DKC+CZM
has been fulfilled. If
the same amount of energy were released via a bleeder, then, due to the
cycle time, a continuous regenerative power of 243 Watts would result.
This would remain within the cabinet in the form of dissipated power.
Application example
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