Temperature Model - Baumuller b maXX BM3000 Operating Manual

Description of the Software Modules and Parameters

4.11.3.2 Temperature model

The PU temperature model separately emulates and monitors the thermal load of the dif-
ferent device components on the basis of motor currents, the peak current time, the
mains- and DC link voltage as well as the thermal data of the semiconductors. The PU
temperature model is divided into two sub-models. The I
conductors/capacitors and the power electronics sub-model, which protects the power
electronics.
Main voltage, 130.8, 141.12
dc link voltage, 130.3
Heat Sink temperature,
J Ist
130.1,
Iu, Iv, Iw actual values
47.32, 47.33, 47.34
LT-I2t-Ini
N
D
PU I2t max. continuous current actual value, 175.8
Figure 225:
Phase current Iu, Iv, Iw
Voltage Udc
Mains voltage
PU heat sink temperature actual value
PU power electronic temperature actual value (
PU thermal load
Output value of the I2t sub model
Temperature threshold as current limit
Temperature threshold as PWM reduction
PU time constant I
PU max. continuous current actual value
PU I
Correction factors and current derating
The maximum continuous current of the I
continuous current of the device
it" of the temperature model (as displayed in
Power electronic submodel
Therm. therm.
J el
N
model model
N
semicon- semi-
D
conductor ductors
D
J Lim
Initialization
PT1
N
t
I2t
D
Overload monitoring of the power unit (temperature model)
2
t model
2
t max. continuous current actual value
t >30s
J LimPwmRed
t >30s
100
105%
. .
max( , )
PU-I 2 t-Act [%]
max 100
95% 105%
I2t submodel
[A]
[V]
[V ]
eff
( ) [°C]
ist
) [°C]
el
(ThL-Istwert) [%]
2
(LT-I t-Istwert) [%]
( ) [°C]
lLim
( ) [°C]
Lim
( ) [s]
LT-I2t
[A ]
eff
[A ]
eff
2
t-sub-model
Z175.7–
is emulated for the safety function "Current lim-
ZFig.
226–).
Parameter manual b maXX BM3000
Document no.: 5.12001.07
2
t-sub-model, which protects
no PWM reduction
=0 PWM reduction on
=1
Mode
PU temperature model
175.1. bit 0
Status PU temperature model
175.2 bit 5
Current limited to
PU max. continuous current
actual value, 175.7, on
175.15
OR
ThL-Act [%]
responded maximal
torque current limited
Status PU temperature model
175.2 bit 4
5000_0298_rev02_int.cdr
47.32, 47.33, 47.34
130.3
130.8
130.1
175.15
175.7
175.8
Z175.8–
and also the maximum
4
Warning 216
Power unit
responded
PWM reduced
Warning 206
Power unit
727
of 820