Lenze 8400 - Manual (Page 243)

Lenze · 8400 protec HighLine · Reference manual · DMS 3.0 EN · 03/2013 · TD05
243
5 Motor control (MCTRL)
5.10 Parameterisable additional functions
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Settable switching frequencies

Tip!
The Lenze setting
C00018 = 2 (8 kHz var./drive-opt.) is the optimal value for standard
applications.
Lowering the switching frequency due to high heatsink temperatures
Exceeding the maximally permissible heatsink temperature would lead to an inhibited drive due to
the "Overtemperature" error and a torquelessly coasting motor. Therefore, if the Lenze setting is
selected, the switching frequency is reduced to the next frequency below when the heatsink
temperature has risen to 5 °C below the maximally permissible temperature. After the heatsink has
cooled down, the controller automatically switches to the next frequency above until the set
switching frequency is reached.
Switching frequency reduction due to high heatsink temperature can be deactivated via
C00144 . If
the switching frequency reduction is deactivated, the "OH1: Heatsink overtemperature" error
message will be issued when the maximally permissible heatsink temperature is reached. An "Error"
response is the result and the motor is coasting.
Selection in C00018
1 4 kHz var./drive-optimised 21 8 kHz var./drive-opt./4 kHz min
2 8 kHz var./drive-optimised 22 16 kHz var./drive-opt./4 kHz min
3 16 kHz var./drive-optimised 23 16 kHz var./drive-opt./8 kHz min
5 2 kHz constant/drive-optimised 31 8 kHz var./min. Pv/4 kHz min
6 4 kHz constant/drive-optimised 32 16 kHz var./min. Pv/4 kHz min
7 8 kHz constant/drive-optimised 33 16 kHz var./min. Pv/8 kHz min
8 16 kHz constant/drive-optimised Abbreviations used:
• "var.": Adaptation of the switching frequency
depending on the current
• "drive-opt.": drive-optimised modulation ("sine/delta
modulation")
• "fixed": fixed switching frequencies
• "min. Pv": additional reduction of power loss
11 4 kHz var./min. Pv
12 8 kHz var./min. Pv
13 16 kHz var./min. Pv
15 2 kHz constant/min. Pv
16 4 kHz constant/min. Pv
17 8 kHz constant/min. Pv
18 16 kHz constant/min. Pv
Parameter Info Lenze setting
C00144 Switching frequency reduction (temp.) 1: On