58Initial Start Up5.6.1 Motor Overload5.6 PM Synchronous Motors5.6.2 Motor DataThe COMBIVERT drive is capable of providing solid state motor overloadprotection. If it is desired that the drive provide this protection, turn thefunction “on” in parameter LF.08. The drive uses the motor current fromLF.12. As the trigger level.Depending on the motor manufacturer and the installed encoder, it may bepossible to read all motor data from the encoder and preset all data to themanufacturer’s values therefore eliminating the need to adjust the motor data.Refer to section 5.8.3 for a description of this process. Otherwise proceedwith the adjustment steps below.The PM motor power (hp) in LF.10 is calculated from the speed (LF.11) andtorque (LF.17). This value is for reference only.Enter the motor rated speed (rpm) in LF.11. Note in some cases this speedmay be faster than the actual speed the motor will turn at. This parametermust agree with parameters LF.13 based on the following equation. Do notround the numbers enter exactly what is calculated.Rated Freq. x 120 = Rated Speedno. of polesEnter the rated FLA of the motor in parameter LF.12.Enter the rated nameplate frequency in parameter LF.13. Again refer to thecalculation above. Do not round this value enter exactly what is calculated.In LF.14 enter the rated, no load, motor back EMF rms phase to phasevoltage. Follow the steps in section 5.6.3 to measure this value.LF.17 is the motor rated torque. For PM motors enter the rated motor torquein lbft. If this value is not listed on the motor you can calculate it as follows.HP x 5258 = lbft (HP and rpm from motor nameplate)rpmKW x 7043 = lbft (KW and rpm from motor nameplate)rpmLF.18 is the motor stator phase to phase resistance. Follow the steps insection 5.6.3 to measure this value.LF.1 is the motor stator leakage inductance. Follow the steps in section5.6.3 to measure this value.Entry of the PM motor data is now complete!
