I 2 T Monitoring - HEIDENHAIN iTNC 530 Service Manual

2
3.3.9 I t monitoring
HEIDENHAIN inverter systems feature individual I
General
motor.
information
An I
Function
stage model during operation.
The calculation is based on:
A first-order temperature model is available for monitoring power modules, first and second-
order models are available for motors. These models make it possible to permanently calculate
the temperature of the stator winding in the motor or the semiconductor in the power module.
Temperature model in an example comparison (motor)
The I
Because temperature increase and heat dissipation are uneven when the motor is stationary or
moving slowly, the I
This limit range is defined in a motor table or power module table.
The following entries are important:
3 – 676
2
t monitor calculates and supervises the temperature pattern in a thermal motor or power-
The momentary current
The rated or standstill current
(with motors multiplied by MP 2302.x and with power stages multiplied by MP 2304.x)
A device-specific temperature model
T [°C]
200
180
160
140
120
100
80
60
40
20 20
0
0 100
First-order temperature model
Second-order temperature model
Motor temperature
2
t monitor responds if this calculated temperature exceeds a certain limit.
2
t monitor distinguishes between standstill and traversing mode.
F-AC (transition frequency in traversing mode [Hz])
F-DC (transition frequency at standstill [Hz]; only CC 424(B))
2
t monitors, one for each power module and
200 300 400 500
HEIDENHAIN Service Manual iTNC 530
600 700 800 900 1 000
t [s]