Chapter 5 Parameters
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VFD-B Series
Revision July 2008, BE16, SW V4.08 & V5.00
5-71
Group 7: Motor Parameters
07 - 00
Motor Rated Current
Unit: 1
Settings
30 to 120%
Factory Setting: 100
Use the following formula to calculate the percentage value entered into this parameter:
(Motor Current / AC Drive Current) x 100%
with Motor Current=Motor rated current in A shown to motor nameplate
AC Drive Current=Rated current of AC drive in A (see Pr.00-01)
Pr.07-00 and Pr.07-01 must be set if the drive is programmed to operate in Vector Control
mode (Pr.0-09 = 2 or 3). They also must be set if the "Electronic Thermal Overload Relay"
(Pr.06-06) or "Slip Compensation" functions are selected.
07 - 01
Motor No-load Current
Unit: 1
Settings
01 to 90%
Factory Setting: 40
The rated current of the AC drive is regarded as 100%. The setting of the Motor no-load
current will affect the slip compensation.
The setting value must be less than Pr.07-00 (Motor Rated Current).
07 - 02
Torque Compensation
Unit: 0.1
Settings
0.0 to 10.0
Factory Setting: 0.0
This parameter may be set so that the AC drive will increase its voltage output to obtain a
higher torque. Only to be used for V/f control mode.
Too high torque compensation can overheat the motor.
07 - 03
Slip Compensation (Used without PG)
Unit: 0.01
Settings
0.00 to 3.00
Factory Setting: 0.00
While driving an asynchronous motor, increasing the load on the AC motor drive will cause an
increase in slip and decrease in speed. This parameter may be used to compensate the slip by
increasing the output frequency. When the output current of the AC motor drive is bigger than
the motor no-load current (Pr.07-01), the AC drive will adjust its output frequency according to
this parameter.
07 - 04
Number of Motor Poles
Unit: 2
Settings
02 to 10
Factory Setting: 04
This parameter sets the number of motor poles (must be an even number).
