19.2 Actual Values of the Machine
The frequency inverter controls the behavior of the machine in the various operating
points. As a
function of the configuration selected and the expansion cards installed,
control variables and further actual value parameters of the machine can be dis-
Actual Values of the Machine
210
Stator Frequency
The output voltage (motor voltage) of the frequency
inverter.
211
R.m.s current
Calculated effective output current (motor current) of
the frequency inverter.
212
Output voltage
Calculated R.m.s. figure of the phase-to-phase volt-
age (motor voltage) of the frequency inverter.
213
Active power
Active power calculated from the voltage, the current
and the control variables.
214
Active current
Active current calculated from the rated motor pa-
rameters, the control variables and the current.
215
Isd
Current component of the field-orientated control
forming the magnetic flux.
216
Isq
Torque-forming current component of field-orientated
control.
217
sor 1
Calculated from the data on speed sensor 1, the No.
of pole pairs
373 and the speed sensor signal.
Calculation from speed sensor 1 frequency.
221
Slip frequency
Difference from the synchronous frequency calculated
from the rated motor parameters, the control varia-
224
Torque
Torque at the current output frequency calculated
from the voltage, the current and the control varia-
225
Rotor flux
Current magnetic flux relative to the rated motor
parameters.
226
Winding temperature
Measured temperature of the motor winding ac-
cording to Operation mode 465 for temperature ad-
227
Act. rotor time constant
Time constant calculated for the operating point of
the machine from the rated motor parameters, the
rated and control variables.
235
Flux-forming voltage
Voltage component of the field-orientated control
forming the magnetic flux.
236
Torque-forming voltage
Voltage component of the field-orientated control
forming the torque.
238
Flux value
Magnetic flux calculated according to the rated values
and the operating point of the motor.
239
Reactive current
Reactive current calculated from the rated motor
parameters, the control variables and the current.
240
Actual speed Measured or calculated speed of drive.
241
Actual frequency Measured or calculated frequency of drive.
The actual values can be read out and monitored in the VAL menu branch of the oper-
ating unit. The parameter
Operation level 28
in the PARA menu branch defines the
selection of the actual value parameters to be selected.
260 Operating Instructions ACU 06/13