Danfoss AHF 010 Design Manual

Also see for AHF 005: Manual Operating instructions

Contents

Danfoss AHF 010 Design Manual Manual pdf 120 page image

130BD930.111.801.601.401.201.000.800.600.400.200.000 10 20 30 40 50 60 70 80 90 100n [%]P L,CDM (freq,load) [%]1231 100% load2 50% load3 25% loadIllustration 9.3 Drive Power Loss Data.CDM Relative Losses (PL, CDM) [%] versus Speed(n) [% of Nominal Speed].130BD931.11n [%]0 20 40 60 80 100100.0098.0096.0094.0092.0090.00η CDM (freq,load) [%]1231 100% load2 50% load3 25% loadIllustration 9.4 Drive Efficiency Data.CDM Efficiency (ηCDM(freq, load)) [%] versus Speed(n) [% of Nominal Speed].Interpolation of power lossDetermine the power loss at an arbitrary operating pointusing 2-dimensional interpolation.9.1.4 Losses and Efficiency of a MotorThe efficiency of a motor running at 50–100% of thenominal motor speed and at 75–100% of the nominaltorque is practically constant. This is valid both when thefrequency converter controls the motor, or when the motorruns directly on mains.The efficiency depends on the type of motor and the levelof magnetization.For more information about motor types, refer to themotor technology brochure at www.danfoss.com.9.1.5 Losses and Efficiency of a Power DriveSystemTo estimate the power losses at different operating pointsfor a power drive system, sum the power losses at theoperating point for each system component:• Drive• Motor• Auxiliary equipment9.1.6 Losses and Efficiency of a Power DriveSystem with Installed FilterThe MyDrive ecoSmart calculation tool can be used forsystem calculations and creating an energy efficiencyreport. The tool can be found viawww.ecosmart.danfoss.com.The power loss of the VLT® Advanced Harmonic FilterAHF005/AHF010 is specified in 5 different operating pointsas 0–100% load. The current load and power loss arespecified in each operating point. See Table 7.4 for powerlosses.The power loss in the AHF depends on the operating pointand is a function of the input current in the AHF. Theidentification point of operation of the AHF is based onthe input current to the frequency converter. The inputcurrent of the frequency converter equals the input currentto the AHF.IIn,AHF=IIn,VLTThe output current of the frequency converter consists ofthe torque-producing component and the motor magneti-zation component. Different factors affect the relationshipbetween the input current and output current of afrequency converter. For example, part load causes asignificant difference between the 2 currents.IIn,VLT≠Iout,VLTCalculate the input current of the frequency converter withthis formula:IIn,VLT=Iout,VLT x cos(phi) x fmotor [%] x loadmotor [%] x 1.02• Iout,VLT: Nominal output current from thefrequency converter. Find the data in thefrequency converter design guide or MyDriveecoSmart.• Cos (phi): Motor power factor. Find the data onthe motor nameplate. Alternatively, use areference value from IEC 61800-9-2, see Table 9.1.• fmotor [%]: Percentage value of the nominaloperating frequency in the motor in the range 0–1.Appendix VLT® Advanced Harmonic Filter AHF 005/AHF 010118 Danfoss A/S © 05/2019 All rights reserved. MG80C60299