2 Engineering
2.14 Regenerative braking
72
Rapid Link 5 · RAMO5 · RASP5
10/19 MN034004EN
www.eaton.com
2.14 Regenerative braking
In certain operating conditions, the motor may run as a generator in certain
applications (regenerative braking operation).
Figure 35: Regenerative braking with external braking resistance
a
Machine flywheel mass
b
Inverter with brake chopper (brake transistor)
c
Braking resistance (R
B
)
Examples include:
•
Lowering in hoisting gear and conveyor applications
•
Controlled speed reduction in the case of large load inertias
(flywheels)
•
A fast speed reduction in dynamic travel drives
When the motor operates as a generator, its braking energy will be fed into
the variable frequency drive's DC link via the inverter. The DC link voltage
U
DC
will be increased as a result. If the voltage value is too high, the RASP5
variable frequency drive will disable its inverter. The motor will then coast
uncontrolled.
A braking chopper is integrated in the RASP5 speed controller.
The function of the braking chopper must be activated in parameter P4-05.
The braking chopper will be switched on automatically if the braking energy
being fed back causes the DC link voltage to increase to the switch-on volt-
age of the braking chopper.
→
Only for RASP5-…-xxxx1xxS1
M
R
B
3
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Содержание Rapid Link RAMO5
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Страница 122: ...4 Operation 4 3 Manual control 118 Rapid Link 5 RAMO5 RASP5 10 19 MN034004EN www eaton com ...
Страница 136: ...5 RAMO5 Motor starter 5 7 Configure special settings 132 Rapid Link 5 RAMO5 RASP5 10 19 MN034004EN www eaton com ...
Страница 158: ...8 PC tool 8 2 Parameter Editor 154 Rapid Link 5 RAMO5 RASP5 10 19 MN034004EN www eaton com ...
Страница 164: ...9 Control Unit 9 2 Extended parameter set 160 Rapid Link 5 RAMO5 RASP5 10 19 MN034004EN www eaton com ...
Страница 194: ...10 Parameter list 10 4 Parameter groups for RASP 190 Rapid Link 5 RAMO5 RASP5 10 19 MN034004EN www eaton com ...
Страница 208: ...11 Communications 11 5 OP Bus 204 Rapid Link 5 RAMO5 RASP5 10 19 MN034004EN www eaton com ...
Страница 216: ...12 Error messages 12 3 RASP Error list 212 Rapid Link 5 RAMO5 RASP5 10 19 MN034004EN www eaton com ...