Siemens SINAMICS G110M - Protection Functions; Inverter Temperature Monitoring

Functions
8.7 Protection functions
SINAMICS G110M Operating Instructions
200 Operating Instructions, 04/2015, FW V4.7.3, A5E31298649B AD
Commissioning the torque control
The torque control only functions error-free if, during the basic commissioning, you correctly
set the motor data and performed the motor data identification with the motor in the cold
state.
See also section: Basic commissioning with IOP (Page 98).
Table 8- 14 The most important torque control parameters
Parameter
Description
p1300
Control mode:
22: Torque control without speed encoder
p0300 …
p0360
Motor data
is transferred from the rating plate during basic commissioning and calcu-
lated with the motor data identification
p1511
Additional torque
p1520
Upper torque limit
p1521
Lower torque limit
p1530
Motoring power limit
p1531
Regenerative power limit
Additional information about this function is provided in the parameter list and in function
diagrams 6030 onwards in the List Manual.
8.7
Protection functions
The frequency inverter offers protective functions against overtemperature and overcurrent
for both the frequency inverter as well as the motor. Further, the frequency inverter protects
itself against an excessively high DC link voltage when the motor is regenerating.
8.7.1
Inverter temperature monitoring
The inverter temperature is essentially defined by the following effects:
● The ambient temperature
● The ohmic losses increasing with the output current
● Switching losses increasing with the pulse frequency
Monitoring types
The inverter monitors its temperature using the following monitoring types:
● I
2
t monitoring (alarm A07805, fault F30005)
● Measuring the chip temperature of the Power Module (alarm A05006, fault F30024)
● Measuring the heat sink temperature of the Power Module (alarm A05000, fault F30004)