Pm Synchronous Motors; Motor Overload; Motor Data - KEB COMBIVERT F5 Instruction Manual

Initial Start Up
5.6 PM Synchronous Motors
5.6.1 Motor Overload
5.6.2 Motor Data
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The COMBIVERT drive is capable of providing solid state motor overload
protection. If it is desired that the drive provide this protection, turn the
function "on" in parameter LF.08. The drive uses the motor current from
LF.12. As the trigger level.
Depending on the motor manufacturer and the installed encoder, it may be
possible to read all motor data from the encoder and preset all data to the
manufacturer's values therefore eliminating the need to adjust the motor data.
Refer to section 5.8.3 for a description of this process. Otherwise proceed
with the adjustment steps below.
The PM motor power (hp) in LF.10 is calculated from the speed (LF.11) and
torque (LF.17). This value is for reference only.
Enter the motor rated speed (rpm) in LF.11. Note in some cases this speed
may be faster than the actual speed the motor will turn at. This parameter
must agree with parameters LF.13 based on the following equation. Do not
round the numbers enter exactly what is calculated.
Rated Freq. x 120 = Rated Speed
no. of poles
Enter the rated FLA of the motor in parameter LF.12.
Enter the rated nameplate frequency in parameter LF.13. Again refer to the
calculation 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 phase
voltage. 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 torque
in lbft. If this value is not listed on the motor you can calculate it as follows.
HP x 5258 = lbft
rpm
KW x 7043 = lbft
rpm
LF.18 is the motor stator phase to phase resistance. Follow the steps in
section 5.6.3 to measure this value.
LF.1 is the motor stator leakage inductance. Follow the steps in section
5.6.3 to measure this value.
Entry of the PM motor data is now complete!
(HP and rpm from motor nameplate)
(KW and rpm from motor nameplate)