Siemens SINAMICS G150 - DC Braking

Functions, monitoring, and protective functions
9.2 Drive functions
Converter cabinet units
508 Operating Instructions, 07/2016, A5E03347396A
NOTICE
Material damage by using motors that are not short-circuit proof or an incorrectly
dimensioned Power Module/Motor Module
When using motors that are not short-circuit proof, activating the external armature short-
circuit braking can damage the motors or the Power Module/Motor Module.
• Only use motors that are short-circuit proof.
• Use suitable resistors for short-circuiting.
• Dimension the Power Module/Motor Module for 1.8 times the short circuit current of the
motor.
Function diagram
FP 7016
Technology functions - Internal armature short circuit
Parameters
•
p0300:
Mot type selection
•
p1230
BI: Armature short
-circuit/DC braking activation
•
p1231
Armature short
-circuit/DC braking configuration
•
4: Internal armature short-circuit/DC braking
•
r1239
CO/BO: Armatu
re short-circuit/DC braking status word
9.2.9.4
DC braking
Description
DC braking is only available for induction motors. It is used preferably when braking in a
hazardous situation, if controlled braking via the drive is no longer possible (for example, in
the event of a power failure, an EMERGENCY OFF, etc.) or if no regenerative infeed is
used.
DC braking is activated via p1231 = 4 or via p1231 = 14. It can be initiated via an input signal
p1230 (signal = 1) or a fault response.