
Functions
7.9 Application-specific functions
Frequency inverters with Control Units CU230P-2 HVAC, CU230P-2 DP, CU230P-2 CAN
226
Operating Instructions, 01/2011, FW 4.4, A5E02430659B AD
Main features of the braking functions
DC braking
The motor converts the regenerative power into
heat.
•
Advantage: The motor brakes without the
inverter having to process the regenerative
energy
•
Disadvantages: significant increase in the
motor temperature; no defined braking
characteristics; no constant braking torque; no
braking torque at standstill; regenerative
power is lost as heat; does not function when
the line supply fails
Compound braking
The motor converts the regenerative power into
heat.
•
Advantage: Defined braking characteristics,
the motor brakes without the inverter having to
convert any regenerative energy
•
Disadvantages: significant motor temperature
rise; no constant braking torque; regenerative
power is dissipated as heat; does not function
when the line supply fails
a
a
0RWRU
%UDNH
SRZHU
/RDG
,QYHUWHU
0
Dynamic braking
The inverter converts the regenerative
power into heat using a braking resistor.
•
Advantages: defined braking
characteristics; no additional motor
temperature increase; constant
braking torque; in principle, also
functions when the power fails
•
Disadvantages: Braking resistor
required; regenerative power is
dissipated as heat
a
a
,QYHUWHU
%UDNLQJUHVLVWRU
%UDNLQJUHVLVWRU
0RWRU
%UDNH
SRZHU
/RDG
,QYHUWHU
%UDNLQJ FKRSSHU
0
Summary of Contents for SINAMICS G120 CU230P-2
Page 2: ......