Danfoss VLT AutomationDrive FC 360 Quick Manual

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Danfoss VLT AutomationDrive FC 360 Quick Manual Manual pdf 31 page image

5.4 PM Motor SetupInitial Programming Steps1. Select [1] PM, non salient SPM in 1-10 MotorConstruction to activate PM motor operation.2. Select [0] Open Loop in 1-00 Configuration Mode.NOTICEEncoder feedback is not supported for PM motors.Programming motor dataAfter selecting PM motor in 1-10 Motor Construction, thePM motor-related parameters in parameter groups 1-2*Motor Data, 1-3* Adv. Motor Data and 1-4* are active.The information can be found on the motor nameplateand in the motor data sheet.The following parameters must be programmed in thelisted order1. 1-24 Motor Current2. 1-26 Motor Cont. Rated Torque3. 1-25 Motor Nominal Speed4. 1-39 Motor Poles5. 1-30 Stator Resistance (Rs)Enter line to common stator winding resistance(Rs). If only line-line data is available, divide theline-line value by 2 to achieve the line tocommon (starpoint) value.It is also possible to measure the value with anohmmeter, which also takes the resistance of thecable into account. Divide the measured value by2 and enter the result.6. 1-37 d-axis Inductance (Ld)Enter line to common direct axis inductance ofthe PM motor.If only line-line data is available, divide the line-line value with 2 to achieve the line-common(starpoint) value.It is also possible to measure the value with aninductance meter, which also takes theinductance of the cable into account. Divide themeasured value by 2 and enter the result.7. 1-40 Back EMF at 1000 RPMEnter line-to-line back EMF of PM Motor at 1000RPM mechanical speed (RMS value). Back EMF isthe voltage generated by a PM motor when nofrequency converter is connected and the shaft isturned externally. Back EMF is normally specifiedfor nominal motor speed or for 1000 RPMmeasured between 2 lines. If the value is notavailable for a motor speed of 1000 RPM,calculate the correct value as follows: Forexample, if back EMF at 1800 RPM is 320 V, theback EMF at 1000 RPM is:Back EMF=(Voltage/RPM)*1000=(320/1800)*1000=178.Program this value for 1-40 Back EMF at 1000RPM.Test Motor Operation1. Start the motor at low speed (100 to 200 RPM). Ifthe motor does not turn, check installation,general programming and motor data.ParkingThis function is the recommended choice for applicationswhere the motor is rotating at slow speed e.g. windmillingin fan applications. 2-06 Parking Current and 2-07 ParkingTime are adjustable. Increase the factory setting of theseparameters for applications with high inertia.Start the motor at nominal speed. In case the applicationdoes not run well, check the VVC+ PM settings. Table 5.7shows recommendations in different applications.Application SettingsLow inertia applicationsILoad/IMotor <5• Increase the value for1-17 Voltage filter time const. byfactor 5 to 10• Reduce the valuefor1-14 Damping Gain• Reduce the value (<100%) for1-66 Min. Current at Low SpeedLow inertia applications50>ILoad/IMotor >5Keep calculated valuesHigh inertia applicationsILoad/IMotor > 50Increase the values for1-14 Damping Gain, 1-15 Low SpeedFilter Time Const. and 1-16 HighSpeed Filter Time Const.High load at low speed<30% (rated speed)1-17 Voltage filter time const. shouldbe increased1-66 Min. Current at Low Speedshould be increased (>100% forlonger time can overheat the motor)Table 5.7 Recommendations in Different ApplicationsIf the motor starts oscillating at a certain speed, increase1-14 Damping Gain. Increase the value in small steps.Starting torque can be adjusted in 1-66 Min. Current at LowSpeed. 100% provides nominal torque as starting torque.Local Control Panel and Pro... Quick GuideMG06A502 Danfoss A/S © Rev. 06/2014 All rights reserved. 295 5