Armature Short-Circuit Braking - Siemens SINAMICS G220 Operating Instructions Manual

Functions
14.11 Drive functions
14.11.8

Armature short-circuit braking

Overview
Armature short-circuit braking brakes the load. During braking, armature short-circuit braking
converts the kinetic energy of the load in the motor into heat.
Requirement
Requirements:
• The armature short-circuit braking function is possible only for permanently excited
synchronous motors.
• Motor rated short-circuit current p0320 < Maximum motor current p0323
• Additional requirement for internal armature short-circuit braking:
Power unit maximum current r0209[0] ≥ 1.8 · rated short-circuit current r0331
Motor acceleration by pulling load
A pulling load may accelerate the motor significantly even if armature short-circuit braking is
active. An unexpectedly high speed can damage the machine or result in death or serious injury.
• If there is a pulling load, use a mechanical brake in addition to the armature short-circuit
Description of function
A "1" signal of the binary signal sink p1230 activates the "Armature short-circuit braking"
function.
A "0" signal of the binary signal sink p1230 deactivates the "Armature short-circuit braking"
function.
The "Armature short-circuit braking" function briefly closes the stator windings of the
synchronous motor. If the synchronous motor is rotating, a current flows that brakes the
motor.
596
WARNING
braking.
Operating Instructions, 04/2024, FW V6.2, A5E51781573B AB
SINAMICS G220 converter