Setting The Braking Function - Siemens SINAMICS V20 Operating Instructions Manual
Low voltage converters
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Also See for SINAMICS V20:
- Operating instructions manual (404 pages) ,
- Getting started (66 pages) ,
- Manual (40 pages)
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Commissioning via the built-in BOP
5.6 Function commissioning
5.6.2.5
Setting the braking function
Functionality
The motor can be electrically or mechanically braked by the converter via the following
brakes:
● Electrical brakes
– DC brake
– Compound brake
– Dynamic brake
● Mechanical brake
– Motor holding brake
DC braking
DC braking causes the motor to stop rapidly by applying a DC braking current (current
applied also holds shaft stationary). For DC braking, a DC current is impressed in the stator
winding which results in a significant braking torque for an asynchronous motor.
DC braking is selected as follows:
● Sequence 1: selected after OFF1 or OFF3 (the DC brake is released via P1233)
● Sequence 2: selected directly with the BICO parameter P1230
Sequence 1
1. Enabled using P1233
2. DC braking is activated with the OFF1 or OFF3 command (see figure below)
3. The converter frequency is ramped down along the parameterized OFF1 or OFF3 ramp
down to the frequency at which DC braking is to start - P1234.
4. The converter pulses are inhibited for the duration of the de-magnetizing time P0347.
5. The required braking current P1232 is then impressed for the selected braking time
P1233. The status is displayed using signal r0053 bit 00.
The converter pulses are inhibited after the braking time has expired.
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SINAMICS V20 Converter
Operating Instructions, 10/2019, A5E34559884-012
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