Functions Of Sensorless Control; Slip Compensation - BONFIGLIOLI Agile Operating Instructions Manual

Parameter descriptions
Backlash
440
Motor Power off
0 - Off
1 - Active, Fixed Frequency 1
The Switch off behavior, which is set up by the Stopping behavior (
630) is not changed by
mode
switched on, the power stage is additionally switched off if the control deviation <
Backlash
motor is switched on again as soon as the control deviation is larger again than the
set up threshold of
7.9.4

Functions of sensorless control

The configurations of the sensorless control contain the following additional functions, which supple-
ment the behavior according to the parameterized V/f characteristic (
7.9.4.1

Slip compensation

660 Operation Mode (slip compensation)
The load-dependent difference between the reference speed and the actual speed of the 3-phase
motor is referred to as the slip. This dependency can be compensated by the current meas-urement in
the output phases of the frequency inverter.
The activation of
Operation Mode
feedback. The stator frequency and speed are corrected depending on the load.
660
Operation Mode
0 - Off
1 - On
The slip compensation is activated during the guided commissioning. The
required to ensure a correct function and is measured during the guided commissioning.
If no guided commissioning is executed, the slip compensation can be activated manually. In these
cases, enter the value for the
For parameter
Configuration
selected.
661 Amplification
662 Max. Slip Ramp
663 Frequency Lower Limit
The control behavior of the slip compensation can only be optimized via the parameters in the case of
specific applications. The parameter
the effect of the slip compensation proportionally to the change of load. Parameter
662 defines the maximum frequency change per second in order to avoid an overload in the case of a
load change.
The parameter
Frequency Lower Limit
sation becomes active.
Parameters
No. Description
661 Amplification
662 Max. Slip Ramp
663 Frequency Lower Limit
Control functions
The switch off of the power stage is not influenced.
Factory setting.
If the control deviation <
Actual Frequency <
power stage is switched off.
Backlash Motor Power off
618 and Actual Frequency <
618.
Backlash
660 for the slip compensation enables as speed control without
The slip compensation is deactivated. Factory setting.
The load-dependent slip speed is compensated
377 manually according to the motor data sheet.
Stator Resistance
30, setting "110 - IM: sensorless control" (V/f characteristic) must be
Amplification
663 determines the frequency as from which the slip compen-
Min.
0%
0.01 Hz/s
0.01 Hz
227
Function
618 and at the same time the
Backlash
Switch-Off Threshold Stop Function
616. While this function is
Switch-Off Threshold Stop Function
Configuration
Function
661 determines the correction of the speed and
Setting
Max. Fact. sett.
300.0% 100.0%
650.00 Hz/s 5.00 Hz/s
999.99 Hz 0.01 Hz
06/2013 Operating Instructions
637 the
Operation
637. The
30 = 110).
377 is
Stator Resistance
Max. Slip Ramp
Agile