BENSHAW RSi GM2 Series - Sensorless Vector Control Operation Guide for Induction Motors

Learning Advanced Features
122
890054-00-00
GM2 Series VFD
Sensorless Vector Control Operation Guide for Induction
Motors
Problem
Relevant
Function Code
Troubleshooting
If the number of motor
rotations drops due to
the lack of torque
Cn.22 Out Trq.
Comp. Gain
If there is a severe drop in the motor rotation
to 36 RPM or more, increase the Cn.22 Out Trq.
Comp. Gain value in 10% units.
If the motor rotation
count error factor is 18
RPM or greater even
though there is a
sufficient amount of
torque.
Cn.23 Spd. Comp.
Sub Gain
Cn.24 Spd. Comp.
Main Gain
Change the Cn.24 Spd. Comp. Main Gain value
in 5% units. Refer to the load-rotation count
gradient according to the Cn.24 Spd. Comp.
Main Gain value below.
Example: The gradient slants counterclockWise
as the Cn.24 Spd. Comp. Main Gain value
increases.
Change the Cn.23 Spd. Comp. Sub Gain value
in 5% units. Refer to the load-rotation count
gradient according to the Cn.23 Spd. Comp.
Sub Gain value below.
Example: The gradient slants clockWise as
Cn.23 Spd. Comp. Sub Gain value increases.
If torque is lacking due
to a load increase in
low speed (5 Hz or
less)
Cn.21 Out Trq.
Comp. Gain at
Low Spd
If torque is lacking under low speed, increase
the Cn.21 value in 5% units.
If rotating in reverse
direction due to a load
increase in low speed
(5 Hz or less)
Cn.21 Out Trq.
Comp. Gain at
Low Spd
If rotating in reverse direction due to a load
increase in low speed, decrease the Cn.21 value
5% at a time.