Parameter descriptions
The rated magnetizing current determined during the guided commissioning procedure is set to an
optimized value and does not have to be adjusted.
718 Rated slip correction factor (asynchronous motor, field-orientated control)
T
he rotor time constant results from the inductivity of the rotor circuit and the rotor resistance. Due to
the temperature-dependence of the rotor resistance and the satura-tion effects of the iron, the rotor
time constant is also dependent on temperature and current. The load behavior and thus the rated
slip depend on the rotor time constant. The guided commissioning determines the machine data dur-
ing the parameter identification and sets the parameter
Rated slip correction factor 718 accordingly.
The value calculated by the rotor time constants can be read out via the actual value
Current rotor
time constant
227. Parameter identification (during guided commissioning "Setup") should be done
while the motor is cold.
No. Description Min. Max. Fact. sett.
718 Rated slip correction factor 0.01% 300.00% 100.00%
383 Voltage constant (synchronous motor)
In Configuration 610 (parameter
Configuration 30) for control of synchronous motors, the control
behavior should be optimized by setting parameter
Voltage constant 383.
The auto-setup during the guided commissioning (setup) identifies the voltage constant of the syn-
chronous motor. If a value > 0 mV was entered before manually, the voltage constant will not be
determined during auto-setup. The entered value is maintained.
For the voltage constant, refer to the motor data sheet. In the motor data sheet, the value may be
indicated in
. This value can be taken over for Parameter Voltage constant 383.
If the guided commissioning (Setup) is not carried out, the auto-setup should be carried out via pa-
rameter
SETUP selection 796 in order to improve the drive behavior, particularly for small speeds.
Select one of the settings 10 … 14 for
SETUP selection 796.
During the guided commissioning (via keypad and VPlus) for Bonfiglioli motors the voltage constant is
pre-allocated.
For Non-Bonfiglioli motors the voltage constant should be entered if it is known. If the voltage con-
stant is unknown, set
Voltage constant 383 to 0 mV before the commissioning to ensure the auto-
matic calculation and measurement.
The voltage constant should be optimized after the guided commissioning procedure: In no-load op-
eration, set 50% of the rated speed. Change the voltage constant in small steps until parameter
Rotor
flux
225 displays the value 101% (±0.5%).
In the case of motors with a very high number of pole pairs (e.g. higher than 20), it is
possible that the maximum setting range of the parameter is not sufficient. In this
case, divide the voltage constant by 10 and enter the value. The
division by 10 is co
384 Stator inductance (synchronous motor)
In configuration 610 for the control of synchronous machines, the control behavior can be improved
for high dynamic requirements by setting the parameter
Stator inductance 384.
116
Operating Instructions
Agile
06/2013 Machine data
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