Lenze 8200 Frequency inverters - Manual (Page 166)

Configuration
8200SHB0199 7-29
7.5.9.2 Chopper frequency
820X setting range: Fixed chopper frequency up to 9.2 kHz.
Automatic lowering of the chopper frequency is not
possible.
Setting range 821X/822X/824X:
Code Name Possible settings IMPORTANT
Lenze Choice Info
C018 ¤ Chopper frequency C018 ¤
821X/822X/824X -1- -0- 4 kHz
-1- 8 kHz
-2- 12 kHz
-3- 16 kHz
-4- 12 kHz reduced noise emission
-5- 16 kHz reduced noise emission
-4- 4 kHz reduced noise emission
-5- 8 kHz reduced noise emission
-6- 12 kHz reduced noise emission
-7- 16 kHz reduced noise emission
HVAC only
HVAC only
HVAC only
HVAC only
C144 ¤ Chopper-frequency
reduction
821X/822X/824X -1- -0- No chopper-frequency lowering
-1- Automatic chopper-frequency at
J
max
- 10 •C
Function C018 With this function, you set the chopper frequency of the inverter. With factory setting, the chopper
frequency (C018) is set to 8 kHz. Reasons for other parameter settings may be:
- < 8 kHz:
- Improved running performance with smaller field frequencies
- > 8 kHz:
- Reduced noise emission in the connected motor
- Good sine wave of the motor current for applications with field frequencies > 150 Hz, e.g.
middle frequency drives (C018 = -4- or -5-)
Important With chopper frequencies > 8 kHz, the unit suffers high power losses, which must be compensated
by derating the output current. Please observe the indications in chapter 3.4 and the corresponding
parameter setting of the current limit under C022/C023 to ”I
max
for 60 s”.
- Filters and chokes in the motor cable must meet the requirements of chopper frequency (e.g. sine
interference suppression filter, if C018 = -5-). Please observe the notes of the manufacturers.
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