Operating Instruction - Frequency Inverter 230V / 400V ... - opis.cz

17.7.2 Temperature AdjustmentThe field-orientated control modes are based on the most precise calculation of themachine model possible. The rotor time constant is an important machine variable forthe calculation. The value to be read out via the parameter Act. Rotor Time Constant227 is calculated from the inductivity of the rotor circuit and the rotor resistance. Thedependence of the rotor time constant on the motor temperature can be taken intoaccount in the case of particularly high precision requirements via a suitable measurement.Via Operation Mode 465 for the temperature adjustment, you can selectdifferent methods and actual value sources for temperature measurement.Operation modeFunction0 - Off The function is deactivated.Temperature synchronization(0 ... 200 ° C => 0 ... 10 V / 0 ... 20 mA),1 - Temp. Meas. on MFI1Aactual temperature value at multifunctional input1Determination of temperature by frequency invertervia measurement of the winding resistance4 - Temp. Meas. at Startwithout external temperature measurementOperation mode 1 requires an external temperature measurement system whichevaluates the temperature sensor and maps the temperature range from 0...200 °C toan analog voltage or current signal. The Operation Mode 452 of multifunction inputMFI1 must be selected accordingly.Operation mode 4 is available in configurations 210 and 230. When the signals Controllerrelease and Start clockwise or Start anticlockwise are present, the motor temperatureand the rotor time constant are synchronized by means of the measuredwinding resistance.The material used for the rotor winding of the motor is taken into account via theparameter Temperature Coefficient 466. This value defines the change of the rotorresistance 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 aluminumat a temperature of 20°C.The temperature characteristic within the software is calculated via the aforementionedtemperature coefficient and the parameter Temperature Adjustment 467. Theadjustment temperature enables an additional optimization of the rotor time constantalongside the parameter Rated Slip Correction Factor 718.ParameterSettingsNo. Description Min. Max. Fact. sett.466 Temperature Coefficient 0.00%/100 °C 300.00%/100 °C 39.00%/100 °C467 Adjusting Temperature -50 °C 300 °C 35 °CThe synchronization of the rotor time constant as a function of the winding temperaturecan be adjusted. The default values should normally be sufficiently precise so thatneither an adjustment of the rotor time constants via the parameter Rated Slip CorrectionFactor 718 nor an adjustment of the temperature synchronization via theparameter Temperature Coefficient 466 is necessary. If an adjustment is necessary,please remember that the rotor time constant is calculated by the guided commissioningvia the machine data. The Adjusting Temperature 467 is to be set to the temperatureat which the optimization of the extended machine data was carried out. Thetemperature can be read out via the actual value parameter Winding Temperature226 and can be used in the optimization for the parameter.02/06 169