BONFIGLIOLI active cube 201, Руководство по эксплуатации

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246 Operating Instructions ACU 12/16
19.7.2 Temperature Adjustment
The field-oriented control systems are based on the most precise calculation of the machine model
possible. The rotor time constant is an important machine variable for the calculation. The figure to
be read out via the parameter
Act. Rotor Time Constant
227 is calculated from the inductance of
the rotor circuit and the rotor resistance. The dependence of the rotor time constant on the motor
temperature can be taken into account in the case of particularly high precision requirements via a
suitable measurement. Via
Operation Mode
465 for the temperature adjustment, you can select
different methods and actual value sources for temperature measurement.
Operation Mode 465 Function
0 - off The function is deactivated.
1 - Temp. meas. on MFI1A
Temperature synchronization
(0 ... 200
°
C => 0 ... 10 V / 0 … 20 mA),
actual temperature value at multifunction input 1
4 - Temp.meas. upon start
Determination of temperature by frequency inverter via
measurement of the winding resistance without external
temperature measurement
11 -
Vectron temp. meas. on
MFI1A
Temperature synchronization; act. temperature value across
analog multi-function input.
(-26.0 °C … 207.8 °C => 0 ... 10 V / 0 … 20 mA)
Operation mode 1 requires an external temperature measurement system which evaluates the
temperature sensor and maps the temperature range from 0...200 °C to an analog voltage or
current signal.
Operation Mode
452 of multifunction input MFI1 must be selected accordingly.
Operation mode 4 is available in configurations 210, 211 and 230. When the signals Controller
release and Start clockwise or Start anticlockwise are present, the motor temperature and the rotor
time constant are synchronized by means of the measured winding resistance.
For Operation Mode 11, an optional temperature measurement board from Bonfiglioli Vectron MDS
GmbH is required. This board can be connected to the 20 V power supply on the frequency inverter.
This board converts the temperature to an analog voltage or current signal in a range from -26.0 °C
to 207.8 °C. The resistance of the measuring resistor KTY84/130 to be used is 1000 Ω at a
temperature of 100 °C.
The material used for the rotor winding of the motor is taken into account via the parameter
Temperature Coefficient
466 . This value defines the change of the rotor resistance as a function of
the temperature for a certain material of the rotor winding. Typical temperature coefficients are
39%/100 °C for copper and 36%/100 °C for aluminum at a temperature of 20°C.
The temperature characteristic within the software is calculated via the aforementioned temperature
coefficient and the parameter
Adjusting Temperature
467 . The adjustment temperature enables an
additional optimization of the rotor time constant alongside the parameter
Rated Slip Correction
Factor
718 .
Parameter Setting
No. Description Min. Max. Factory setting
466 Temperature coefficient 0.00%/100 °C 300.00%/100 °C 39.00%/100 °C
467 Adjusting temperature -50 °C 300 °C 35 °C
The synchronization of the rotor time constant as a function of the winding temperature can be
adjusted. The default values should normally be sufficiently precise so that neither an adjustment of
the rotor time constants via the parameter
Rated Slip Correction Factor
718 nor an adjustment of
the temperature synchronization via the parameter
Temperature Coefficient
466 is necessary. If an
adjustment is necessary, please remember that the rotor time constant is calculated by the guided
commissioning via the machine data. The
Adjusting Temperature
467 is to be set to the
temperature at which the optimization of the extended machine data was carried out. The
temperature can be read out via the actual value parameter
Winding Temperature
226 and can be
used in the optimization for the parameter.