Armature Short-Circuit Braking For Permanent-Magnet Synchronous Motors; Internal Armature Short-Circuit Braking - Siemens SINAMICS S120 Function Manual

6.11.1

Armature short-circuit braking for permanent-magnet synchronous motors

Preconditions
● This function has been released for Motor Modules in the booksize and chassis formats.
● Short-circuit-proof motors (p0320 < p0323)
● One of the following motor types is used:
● The maximum current of the Motor Module (r0209.0) must be at least 1.8x the motor
6.11.1.1

Internal armature short-circuit braking

With the internal armature short-circuit braking, the motor windings are short-circuited using
the Motor Module.
Setting
The internal armature short-circuit braking is set with p1231 = 4.
Activation
The function is activated and initiated if the signal source of p1230 is set to a "1".
Deactivation
The function is deactivated if the signal source of p1230 is set to a "0". When triggered by a
fault, the fault must have been removed and acknowledged.
Drive functions
Function Manual, (FH1), 01/2013, 6SL3097-4AB00-0BP3
– rotating permanent-magnet synchronous motor (p0300 = 2xx)
– linear permanent-magnet synchronous motor (p0300 = 4xx)
short-circuit current (r0331).
Note
Internal short-circuit braking despite power failure
If armature short-circuit braking should still be maintained despite a power failure, you
must buffer the 24 V power supply for the Motor Module. For this purpose, you can use
for example a dedicated SITOP unit for the Motor Module or a Control Supply Module
(CSM).
6.11 Armature short-circuit braking, DC braking
Basic functions
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