Diameter compensator – Lenze 8615E User Manual
Page 117
9.9.2
Conversion of modulation of dancer-Position controller field
frequency
Code Cl 91 a calibration factor which is used convert the
modulation of the dancer-Position controller into a frequency. The
this
is
That means that the user assigns the
corresponding field frequency with 1% modulation of the dancer-
controller.
Example:
With Cl 91 = 290
100% modulation of the dancer-Position
controller corresponds to a field frequency of 29 Hz.
Parameter
( F a c t o r y s e t t i n g i s p r i n t e d i n b o l d )
Acceptance
10
10
(1
4800
ON-LINE
factor dancer-
pos. controller
Limitation of the modulation of the dancer-Position controller
The frequency which is determined by the modulation of the
dancer-Position controller and the factor programmed
Cl 91,
be limited permissible
C192. For
a
field frequency is entered
Cl92 which
the
calculated value to the
setting range”
is the
frequency range from
to the
frequency C015)
In the “field weakening range” (frequency range from the V/f-rated
frequency CO1 5
CO1 1) the
of the
is increased
and he field frequency is increased by the same factor squared.
Therefore, the increase of the limitation depends on the field
frequency.
The Ilimitation variable is calculated as follows:
2
Cl 92
momentary
F
Code
(Factory
setting is printed in bold)
1
0
4800
factor dancer-
pos. controller
Hz
0.0
Hz
(0.1 Hz)
Diameter compensator
The
compensator compensates errors
occur slowly
(e.g. unlinerarity of the
If the dancer-Position controller output exceeds the threshold set
Cl 94
compensator), a ramp generator
activated and counts from zero on. This
is added to
the
and
the value falls below the threshold set
Cl 94. As a
the
increases when
exceeding the positive threshold and thus the field frequency CO50
The
is increased if the value falls below
the negative threshold which has the same magnitude as the
positive threshold.
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