Braking Functions; Braking Functions Of The Inverter - Siemens SINAMICS G110D Operating Instructions Manual

Functions
6.9 Technological functions
6.9.2

Braking functions

6.9.2.1

Braking functions of the Inverter

A differentiation is made between electrically braking and mechanically braking a motor:
● The motor is electrically braked by the inverter. An electrical braking is completely wear-
● Mechanical brakes are generally motor holding brakes that are closed when the motor is
Electrical braking and regenerative energy
● If an induction motor electrically brakes the connected load and the kinetic energy that is
● Regenerative braking is not available on the SINAMICS G110D Inverter.
Inverter braking methods
Depending on the particular application and the inverter type, there are different technologies
to handle regenerative energy.
● The regenerative energy is converted into heat in the motor (DC braking)
● The inverter converts the regenerative energy to heat using a braking resistor (dynamic
Different electrical braking methods for different applications
Table 6- 37
Application examples
Pumps, fans, compressors, extruders, mixers
Fans, grinding machines, conveyor belts
Centrifuges, conveyors, hoisting gear, cranes, winders
112
free. Generally, a motor is switched off at standstill in order to save energy and so that
the motor temperature is not unnecessarily increased.
at a standstill. Mechanical operating brakes, that are closed while the motor is rotating
are subject to a high wear and are therefore often only used as an emergency brake.
released exceeds the mechanical and electrical losses, then it operates as a generator.
In this case, the motor converts kinetic energy into electrical energy.
braking)
Braking methods depending on the application
Electrical braking method
Not necessary
DC braking
Dynamic braking
Operating Instructions, 2009-05-15, A5E02385577A AB
SINAMICS G110D