H-61 High Speed Load Compensation
Range:
Function:
100 %
*
[0 - 300
%]
Enter the % value to compensate voltage in
relation to load when the motor is running
at high speed and obtain the optimum U/f
characteristic. The motor size determines
the frequency range within which this
parameter is active.
Motor size
Change-over
0.25 kW - 7.5 kW
> 10 Hz
Table 3.14
H-64 Resonance Dampening
Range:
Function:
100 %
*
[0 - 500
%]
Enter the resonance dampening value. Set
and
H-65 Resonance Dampening Time Constant
to
help eliminate high-frequency resonance
problems. To reduce resonance oscillation,
increase the value of
NOTE
will not have effect when
P-20 Motor Construction
=
[1] PM
, non salient SPM.
H-65 Resonance Dampening Time Constant
Range:
Function:
5 ms
*
[5 - 50 ms] Set
H-65 Resonance Dampening Time Constant
to
help eliminate high-frequency resonance
problems. Enter the time constant that
provides the best dampening.
NOTE
H-65 Resonance Dampening Time Constant
will not have
effect when
P-20 Motor Construction
=
[1] PM
, non salient
SPM.
H-66 Min. Current at Low Speed
Range:
Function:
100
%
*
[1 -
200 %]
Enter the minimum motor current at low speed,
see
. Increasing this
current improves motor torque at low speed.
H-66 Min. Current at Low Speed
[0] Speed open loop
only.
The frequency converter runs with constant
current through motor for speeds below 10 Hz.
For speeds above 10 Hz, the motor flux model in
the frequency converter controls the motor.
and/or
automatically adjust
. The parameter with the
H-66 Min. Current at Low Speed
Range:
Function:
highest value adjusts
. The current setting in
is composed of the torque generating
current and the magnetizing current.
Example: Set
to 100%
and set
H-66 Min. Current at Low Speed
automatically
adjusts to about 127%, depending on the motor
size.
3.7.6 H-7# Adjustable Warnings
Parameters to configure the warnings limits for current,
speed, reference, and feedback.
Warnings are shown on the keypad, and can be
programmed to be outputs or to be read out via serial bus
in the Extended Status Word.
Illustration 3.31 Adjustable Warnings
H-70 Warning Current Low
Range:
Function:
0 A
*
[0 - par.
H-71 A]
Enter the I
LOW
value. When the motor current
falls below this limit, the display reads
Current
Low
. The signal outputs can be programmed
to produce a status signal on terminal 27 or
29 and on relay output 01 or 02. Refer to
H-71 Warning Current High
Range:
Function:
par.
DR-37 A
*
[par. H-70
- par. DR-37
A]
Enter the I
HIGH
value. When the motor
current exceeds this limit, the display
reads
Current High
. The signal outputs
can be programmed to produce a status
signal on terminal 27 or 29 and on relay
output 01 or 02. Refer to
Parameter Descriptions
AF-650 GP Programming Guide
DET-618C
67
3
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