Dc Braking - Siemens SINAMICS G220 Operating Instructions Manual

Functions
14.11 Drive functions
p0861
r0863.0...1
p0867
c0870
14.11.7

DC braking

Overview
With DC braking, the motor brakes the load by converting the kinetic energy of the load into heat.
Requirement
Suitable for applications in which the motor must be braked electrically but neither a converter
with energy recovery nor a braking resistor is available.
Typical applications are:
• Centrifuges
• Saws
• Grinding machines
• Conveyor belts
Applications involving suspended loads, e.g. hoisting gear/cranes or vertical conveyors, are
not permitted.
The DC braking function is not possible in the event of a power failure.
The DC braking function is possible only for induction motors.
NOTICE
Motor overheating as a result of DC braking
DC braking can subject the motor to thermal overload. A thermal overload damages the motor.
• Monitor the motor temperature.
• Allow the motor to cool down between braking operations.
Description of function
The motor brakes the load without the converter having to process regenerative power.
The motor converts braking energy of the load into heat.
590
Line contactor monitoring time
Drive coupling status word/control word
Power unit main contactor holding time after OFF1
Close main contactor
Operating Instructions, 04/2024, FW V6.2, A5E51781573B AB
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[ms]
SINAMICS G220 converter