KEB COMBIVERT F5, Справочное руководство, Страница: 146 / 349

146
LM - Motor Data Parameters
The motor power factor, according to nameplate.
This parameter is not the efficiency of the motor but the ratio of the magnetizing
current to the total phase current of the motor. Lower power factor values will
increase the magnetizing current to the motor and thus incr
ease the field
strength resulting in tighter control of the motor. Higher values decrease the
magnetizing current and the field strength.
If not known, a value of 0.9 is recommended for old high slip motors and
a value of 0.75 is recommended for gearless induction motors.
This parameter is not applicable to PM Synchronous motors and therefore
will not appear.
The rated motor torque in lb-ft or Nm, depending on selection of US02 System
Units.
For IM the torque value is calculated from the rated speed (LM02) and rated
power (LM01) and is therefore read-only. Refer to Motor Power (LM01).
For PM motors the torque value must be entered and is used to establish the
torque constant. Enter the rated name plate torque.
Since the desired unit for rated motor torque may not appear on the motor
nameplate, below are the appropriate conversions:
• lb-ft = HP x 5258 / Rated Speed (rpm)
• lb-ft = kW x 7043 / Rated Speed (rpm)
• lb-ft = Nm / 1.355
• Nm = HP x 7125 / Rated Speed (rpm)
• Nm = kW x 9543 / Rated Speed (rpm)
• Nm = lb-ft x 1.355
LM06
Motor Power Factor
i
LM07
Motor Torque