Fuji Electric Frenic Mega Series User Manual

4.1 Test Run
4-4
4.1.5 Selecting a motor drive control
The FRENIC-MEGA supports the following motor drive controls.
Table 4.1-3
F42
*
data
Drive control
Basic
control
Speed
feedback
Drive
control
type
Speed control Other restrictions
0
V/f control with slip compensation
inactive
Frequency
control
―
1
Dynamic torque vector control ―
2
V/f control with slip compensation
active
Disabled V/f
Frequency
control
with slip
compensation
active
―
3
V/f control with speed sensor
4
Dynamic torque vector control
with speed sensor
V/f
control
Enabled PG V/f
Frequency
control
with automatic
speed regulator
(ASR)
Maximum frequency:
200 Hz
5
Vector control without speed
sensor
Estimated
speed
w/o PG
Maximum frequency:
120 Hz
Not available for
MD-mode inverters.
6
Vector control with speed sensor
Vector
control
Enabled w/ PG
Speed control
with automatic
speed regulator
(ASR)
Maximum frequency:
200 Hz
 V/f control with slip compensation inactive
The inverter outputs the voltage/frequency following the V/f pattern processor's output to drive a motor. This
control disables all automatically controlled features (such as the slip compensation), causing no
unpredictable output fluctuation and enabling stable operation with constant output frequency.
 V/f control with slip compensation active
Applying any load to an induction motor causes a rotational slip due to the motor characteristics, decreasing
the motor rotation. The inverter’s slip compensation function first presumes the slip value of the motor
based on the motor torque generated and raises the output frequency to compensate for the decrease in
motor rotation. This prevents the motor from decreasing the rotation due to the slip.
That is, this function is effective for improving the motor speed control accuracy.
The compensation value is specified by combination of function codes P12
*
(Rated slip frequency), P09
*
(Slip compensation gain for driving) and P11
*
(Slip compensation gain for braking).
H68
*
enables or disables the slip compensation function according to the motor driving conditions.
Table 4.1-4
Motor driving conditions Motor driving frequency zone
H68
*
data
Accl/Decel Constant speed Base frequency or
below
Above the base
frequency
0 Enabled Enabled Enabled Enabled
1 Disabled Enabled Enabled Enabled
2 Enabled Enabled Enabled Disabled
3 Disabled Enabled Enabled Disabled

Fuji Electric Frenic Mega Series Specifications

General

Brand	Fuji Electric
Model	Frenic Mega Series
Category	Inverter
Language	English