Lenze 8615E - Manual (Page 99)

6.1 Automatic chopper frequency reduction
you want to operate the frequency controller with 4 kHz (Cl43
to or a chopper frequency, but also require an
improved smooth running with low Speeds, you activate an
automatic chopper frequency reduction, restricted to this range. For
this, enter the output frequency
C143, below which the
chopper frequency is to be reduced automatically to 2 kHz.
When selecting the chopper frequencies fixed”
(CO1 8 = and “16 kHz fixed” (CO18 = you must set Cl43
“Threshold for automatic chopper frequency reduction to 2 to
0.0 Hz. Otherwise the controller would reduce its chopper
frequency to 2 kHz below the set threshold. This may darnage or
destroy connected filters.
C o d e N a m e Parameter (Factory is printed in bold) Acceptance
Threshold for Hz 0.0 Hz (0.1 Hz} 10.0 Hz ON-LINE
a u t o m a t i c
chopper
Hz = automatic chopper-frequency
frequency
l i m i t a t i o n s w i t c h e d o f f
to
* extended set
6.2 Automatic DC-injection brake
CO19 you enter an output frequency below which
the DC-injection brake is automatically
Code Name Parameter (Factory is printed in bold) Acceptance
CO19 Threshold for 0.0 Hz 7 . 5 H z Hz} 100.0 Hz ON-LINE
automatic 1 0 0 H z 480 Hz
brake
INFO: 0.0 Hz = automatic brake
switched off
For information setting the DC-injection brake see
page 82.
6 . 3 S l i p
load, the of an asynchronous is considerably
reduced.
You eliminate this load-dependent reduction,
also referred to as by using the
In a frequency range from approximately 5 Hz to V/f-rated
frequency (CO1
an accuracy of 1% be obtained.
The value to be entered CO21 is directly proportional to the
rated of the
Code Name Parameter (Factory setting is printed in bold) Acceptance
S l i p 0 . 0 % 0.0 (0.1 20.0 % ON-LINE
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