Varispeed G7 Control Modes; Control Modes And Features - YASKAWA G7 Series Technical Manual

Varispeed G7 Control Modes

Details of the Varispeed G7-Series Drive control modes and their features are provided in this section.

Control Modes and Features

Varispeed G7-Series Drives support the following five control modes, allowing the selection of a control mode
to suit the required purpose. Table 10.1 provides an overview of the control modes and their features.
Control Mode
Parameter Setting
Basic Control
Main Applications
PG Speed Control Card
(Option)
Speed Control
*1
Range
Speed Control
Accuracy
Basic Speed
Perfor-
Response
mance
Maximum
Output Fre-
quency
Starting
*4
Torque
Applica-
tion
Autotuning
Func-
tions
-2
10
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Table 10.1 Overview and Features of Control Modes
V/f Control V/f Control
without PG
A1-02 = 0
Voltage/frequency
fixed ratio control
Voltage/frequency
with speed com-
fixed ratio control
pensation using a
Variable speed
control, particu- Applications
larly for control of requiring high-pre-
multiple motors cision speed con-
with a single Drive trol using a PG on
and for replacing the machine side
existing Drives
Required (PG-A2
Not required.
or PG-D2).
1:40
±2 to 3%
*2
Approx. 1 Hz Approx. 1 Hz
*3
400 Hz
150%/3 Hz 150%/3 Hz
Line-to-line resis- Line-to-line resis-
tance (Normally tance (Normally
not required.) not required.)
Open-loop Vec-
with PG tor Control 1
A1-02 = 2
A1-02 = 1
(factory setting)
Current vector con-
trol without a PG
PG
Variable speed
control, applica-
tions requiring
high performance
without a PG on
the motor side, and
for replacing open-
loop vector control
of the previous VS-
616G5.
Not required.
1:40 1:100
±0.03% ±0.2%
5 Hz
400 Hz 400 Hz
150%/1 Hz
Rotational autotun-
ing, stationary
autotuning, station-
ary autotuning for
line-to-line resis-
tance only
Flux Vector Open-loop Vec-
Control tor Control 2
A1-02 = 3 A1-02 = 4
Current vector con-
trol without a PG
using a high-per-
Current vector con-
formance mag-
trol with a PG
netic flux and
speed estimator
(software)
Very high-perfor-
mance control
Very high-perfor- without a PG on
mance control with the motor side
a PG on the motor (such as simple
side (simple servo- servodrives, torque
drives, high-preci- control, and torque
sion speed control, limiting), and func-
torque control, and tion applications
torque limiting) between flux vec-
tor and open-loop
vector 1 control.
Required (PG-B2
Not required.
or PG-X2).
*13
1:1000
1:200
±0.02% ±0.2%
40 Hz 10 Hz
*13
400 Hz
60 Hz
−1
150%/0.3 Hz
150%/0 min
Rotational autotun- Rotational autotun-
ing, stationary ing, stationary
autotuning, sta5 autotuning, station-
ionary autotuning ary autotuning for
for line-to-line line-to-line resis-
resistance only tance only