Danfoss VLT FC 102 Operating Instructions Manual

Also see for VLT HVAC Drive FC 102: Operating instructions Service guide Programming guide Installation guide Installation guide

Contents

Programming motor dataAfter selecting PM motor in parameter 1-10 MotorConstruction, the PM motor-related parameters inparameter groups 1-2* Motor Data, 1-3* Adv. Motor Data,and 1-4* are active.The necessary data can be found on the motor nameplateand in the motor data sheet.Program the following parameters in the listed order:1. Parameter 1-24 Motor Current.2. Parameter 1-26 Motor Cont. Rated Torque.3. Parameter 1-25 Motor Nominal Speed.4. Parameter 1-39 Motor Poles.5. Parameter 1-30 Stator Resistance (Rs).Enter line to common stator winding resistance(Rs). If only line-line data are available, divide theline-line value with 2 to achieve the line tocommon (starpoint) value.It is also possible to measure the value with anohmmeter, which takes the resistance of thecable into account. Divide the measured value by2 and enter the result.6. Parameter 1-37 d-axis Inductance (Ld).Enter line to common direct axis inductance ofthe PM motor.If only line-line data are available, divide the line-line value with 2 to achieve the line-common(starpoint) value.It is also possible to measure the value with aninductancemeter, which takes the inductance ofthe cable into account. Divide the measuredvalue by 2 and enter the result.7. Parameter 1-40 Back EMF at 1000 RPMEnter line-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: If back EMFis for example 320 V at 1800 RPM, it can becalculated at 1000 RPM as follows: Back EMF =(Voltage/RPM)x1000 = (320/1800)x1000 = 178.Program this value for parameter 1-40 Back EMF at1000 RPM.Test motor operation1. Start the motor at low speed (100–200 RPM). Ifthe motor does not turn, check installation,general programming and motor data.2. Check if start function in parameter 1-70 PM StartMode fits the application requirements.Rotor detectionThis function is the recommended choice for applicationswhere the motor starts from standstill, for example pumpsor conveyors. On some motors, an acoustic sound is heardwhen the impulse is sent out. This does not harm themotor.ParkingThis function is the recommended choice for applicationswhere the motor is rotating at slow speed for examplewindmilling in fan applications. Parameter 2-06 ParkingCurrent and parameter 2-07 Parking Time can be adjusted.Increase the factory setting of these parameters forapplications with high inertia.Start the motor at nominal speed. If the application doesnot run well, check the VVC+ PM settings. Table 5.7 showsrecommendations in different applications.Application SettingsLow inertia applicationsILoad/IMotor <5Increase parameter 1-17 Voltage filtertime const. by factor 5–10Reduce parameter 1-14 DampingGain.Reduce parameter 1-66 Min. Currentat Low Speed (<100%).Low inertia applications50>ILoad/IMotor >5Keep calculated values.High inertia applicationsILoad/IMotor > 50Increase parameter 1-14 DampingGain, parameter 1-15 Low Speed FilterTime Const. and parameter 1-16 HighSpeed Filter Time Const..High load at low speed<30% (rated speed)Increase parameter 1-17 Voltage filtertime const..Increase parameter 1-66 Min. Currentat Low Speed (>100% for aprolonged time can overheat themotor).Table 5.8 Recommendations in Different ApplicationsIf the motor starts oscillating at a certain speed, increaseparameter 1-14 Damping Gain. Increase the value in smallsteps. Depending on the motor, a good value for thisparameter can be 10% or 100% higher than the defaultvalue.Starting torque can be adjusted in parameter 1-66 Min.Current at Low Speed. 100% provides nominal torque asstarting torque.Commissioning VLT® HVAC Drive FC 102 Low Harmonic Drive60 Danfoss A/S © 04/2015 All rights reserved. MG16I30255