Commissioning via the built-in BOP
5.6 Function commissioning
SINAMICS V20 Converter
94
Operating Instructions, 10/2019, A5E34559884-012
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.
Summary of Contents for SINAMICS V20 Inverter
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