94 Chapter 7 - Parameters Description
User Manual
Code
Name
[Code] & Function.
Default
MIN
MAX
Unit
Variation
IPA
P.100
Slip compensat
0
0
250
%
419
P.101
Slip comp filter
0.1
0
10
sec
0.1
420
Boost
P.120 Manual boost [%]
The resistive impedance of the stator windings causes a voltage drop within the motor, which result in a reduction
in torque in the lower speed range.
Compensation can be made for this effect by boosting the output voltage.
This compensation is carried out continuously across the whole speed range in proportion to the output current
but it is most effective at low speed.
F.020
P.120
P.061
P.062
V
F
(n)
P.064
Figure 7.6.8: Manual Boost Voltage
The setting is in percentage of the
Max out voltage (P.061
)
.
P.121 Boost factor src
(Factor extension source of manual Boost)
The manual Boost level can be linearly regulated through an analog reference signal.
The regulation of the Boost level will be between 0% (setting the inputs at 0V - 0mA - 4mA) and 100% of the
percentage value set in
P.120
(+/- 10V - 20mA).
This parameter selects the source from where this function is provided and controlled.
P.122 Auto boost en
(Automatic boost enabling)
The boost can be automatically controlled by the enabling of this parameter. The control is continuously carried
out in the whole speed range.
N
OTE
!
The automatic boost is automatically calculated during the execution of drive/motor self tuning (
P.043
parameter). It is anyway possible to obtain an "Oveboost" at low speed, increasing the value of the
manual boost (
P.120
parameter).
The Auto boost must be disabled when a multiple motor connection is being used.
Code
Name
[Code] & Function.
Default
MIN
MAX
Unit
Variation
IPA
P.120
Manual boost [%]
1
0
25
% of P.061 0.1
421
P.121
Boost factor src
[0] Null
0
0
3
422
[1] Analog inp 1 (setting through I.200 I.204)
P.122
Auto boost en
[0] Disable
1
0
1
423
[1] Enable
