Chapter 4 Parameters
4-116
Group 7: Motor Parameters
07.00
Motor Rated Current (Motor 0)
Unit: A
Settings
30% FLA to 120% FLA
Factory Setting: FLA
Use the following formula to calculate the percentage value entered in this parameter:
(Motor Current / AC Drive Current) x 100%
with Motor Current=Motor rated current in A on type shield
AC Drive Current=Rated current of AC drive in A (see Pr.00.01)
Pr.07.00 must be greater than Pr.07.01.
Example: Suppose that the rated current of 460V/2.0HP(1.5kW) is 4.2A with the factory setting
4.2A. The range that user can set is from 1.3A(4.2X30%) to 5.0A(4.2X120%). But when
Pr.07.00 is set to less than 1.7A(4.2X40%), it needs to set Pr.07.01 to be less than 30% FLA
first. In this way, Pr.07.00 is greater than Pr.07.01.
Pr.07.00 and Pr.07.01 must be set if the drive is programmed to operate in Vector Control
mode (Pr.00.10 = 1). They also must be set if the "Electronic Thermal Overload Relay"
(Pr.06.06) or "Slip Compensation"(Pr.07.03 and Pr.07.06) functions are selected.
The full-load current should be less than the rated current of the AC motor drive and should be
greater than 1/2 rated current of the AC motor drive.
Related parameters: Pr.00.01(Rated Current Display of the AC motor drive),
Pr.06.06(Electronic Thermal Overload Relay Selection), Pr.06.07(Electronic Thermal
Characteristic), Pr.07.01(Motor No-Load Current (Motor 0)), Pr.07.03(Slip Compensation
(Used without PG) (Motor 0)) and Pr.07.06(Motor Rated Slip (Motor 0))
07.01
Motor No-load Current (Motor 0)
Unit: A
Settings
0% FLA to 99% FLA
Factory Setting: 0.4*FLA
This parameter is used to set the motor no-load current. The user must input motor no-load
current by the motor nameplate. The factory setting be set to 40% X the rated current of the
AC motor drive (refer to Pr.00.01 Rated Current Display of the AC motor drive).
Example: Suppose that the rated current of 460V/2.0hp(1.5kW) is 4.2A with factory setting
4.2A. The motor no-load current is 1.7A(4.2X40%) and it should set Pr.07.01 to 1.7.
This parameter must be set if the "Electronic Thermal Overload Relay" (Pr.06.06) or "Slip
Compensation"(Pr.07.03 and Pr.07.06) functions are selected.
If the motor no-load current can’t be read from the nameplate, operating the AC motor drive
after unloading and read it from the digital keypad (optional, refer to Appendix B for details).
The setting value must be less than Pr.07.00 (Motor Rated Current).
Related parameters: Pr.00.01(Rated Current Display of the AC motor drive), Pr.07.00(Motor
Rated Current (Motor 0)), Pr.07.03(Slip Compensation (Used without PG) (Motor 0)) and
Pr.07.06(Motor Rated Slip (Motor 0))
07.02
Torque Compensation (Motor 0)
Settings
0.0 to 10.0
Factory Setting: 0.0
For the induction motor characteristic, parts of the drive output voltage will be absorbed by the
impedance of stator windings when motor load is large. In this circumstance, the output current
will be too large and output torque is insufficient due to the motor voltage at inductance end of
motor is insufficient and insufficient air-gap magnetic field. Using this parameter, it will auto
adjust output voltage by the load to get the best operation with the air-gap magnetic field is
held.
In V/f control mode, the voltage will decrease by the decreasing frequency. It will cause lower
torque in low speed due to less AC impedance and constant DC resistor. Thus, this parameter
can be set for the AC drive increase its voltage output to obtain a higher torque in low speed.
Too high torque compensation can overheat the motor.
