Siemens SINAMICS V20 Series - Page 73

Commissioning
5.6 Function commissioning
SINAMICS V20 Inverter
Operating Instructions, 07/2012, A5E03728167
73
NOTICE
The compound braking depends on the DC link voltage only (see threshold in the above
diagram). This will happen on OFF1, OFF3 and any regenerative condition. Compound
braking is deactivated, if:
• flying start is active
• DC braking is active.
Dynamic braking
Dynamic braking converts the regenerative energy, which is released when the motor
decelerates, into heat. An internal braking chopper or an external dynamic braking module,
which can control an external braking resistor, is required for dynamic braking. The inverter
or the external dynamic braking module controls the dynamic braking depending on the DC
link voltage. Contrary to DC and compound braking, this technique requires that an external
braking resistor is installed.
a
a a
'\QDPLFEUDNLQJ
PRGXOH
%UDNLQJUHVLVWRU
Frame size A / B / C
9
'&
'&
5
5
For more information about the dynamic braking module, refer to the Appendix "
Dynamic
braking module (Page
257)".
a
a a
%UDNLQJUHVLVWRU
%UDNLQJ
FKRSSHU
Frame size D
9
5
5