Lenze 8615E - Manual (Page 98)

6 Additional open-loop and closed-loop control
6.1 Chopper frequency
The of the 8600 series offer the feature to adapt the
chopper frequency of the controller to the noise and smooth
running requirements of the motor. By increasing the chopper
frequency you
generally reduce the motor noises are
generated by the pulsating output voltage.
By reducing the chopper frequency the smooth running in the low
frequency range is often improved.
CO18 you
select a variable fixed chopper frequency.
Variable chopper frequency
With a chopper frequency, from 4 to 16 kHz variable, the set
chopper frequency is maintained us long as the switching losses in
the controller
for this. If an overload is recognized, the
chopper frequency is reduced automatically to the extent as it is
necessary to continue Operation. If the motor
is reduced
again, the chopper frequency is increased.
Fixed chopper frequency
When a fixed chopper frequency is set, the chopper frequency is
not reduced in
of overload. A fixed chopper frequency is
useful only when the of the motor noise is in
every operating state if motor noise filters are used. By reducing
the maximum internally, the overload is restricted.
Code Name
CO1 Chopper
frequency
Parameter (Factory setting is printed in bold)
1 kHz (field frequency max. 120 Hz)
(field frequency max. 240 Hz)
v a r i a b l e
variable
v a r i a b l e
-5- variable
-6- variable
12kHz fixed (for sine filter)
fixed (for sine filter)
Acceptance
[SH PRG]
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