5 Motor control (MCTRL)
5.14 Monitoring
304
Lenze · 8400 HighLine · Reference manual · DMS 12.0 EN · 06/2017 · TD23
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
Temperature model
[5-35] Signal flow for monitoring the brake resistor
The monitoring function calculates the braking current I
Br
from the current DC-bus voltage U
DC_act
and the brake resistance parameterised in C00129:
• The calculation considers the thermal utilisation of the brake resistor based on the following
parameters:
• Resistance value (C00129
)
• Continuous power (C00130
)
• Thermal capacity (C00131
)
• In the Lenze setting these parameters are preset with the corresponding power-adapted Lenze
brake resistor.
• C00133
indicates the calculated utilisation of the brake resistor in [%].
• A utilisation of 100 % corresponds to the continuous power of the brake resistor depending
on the maximally permissible temperature limit.
Related topics:
Braking operation/brake energy management
( 286)
Error message: "oC12: I2xt overload brake resistor"
J
C00138
C00130
C00131
I
Br
I=1
On
I=0
Off
Ixt
2
C00572 C00574
C00129
)
Temperature model
Note!
The monitoring function can also be triggered due to a value entered in C00129
although a brake resistor is not even connected.
I
Br
U
DC_act
C00129
--------------------
=
To Next Page
Loading...
