YASKAWA Varispeed G7 Series User Manual

10 -2
Varispeed G7 Control Methods
Details of the Varispeed G7-Series Inverter control methods and their features are provided in this section.
 Control Methods and Features
Varispeed G7-Series Inverters support the following five control methods, allowing the selection of a control
method to suit the required purpose. Table 10.1 provides an overview of the control methods and their fea-
tures.
Table 10.1 Overview and Features of Control Methods
Control Method V/f Control
V/f Control with
PG
Open-loop Vec-
tor 1 Control
Flux Vector Con-
trol
Open-loop Vec-
tor 2 Control
Constant Setting A1-02 = 0 A1-02 = 1
A1-02 = 2
(factory setting)
A1-02 = 3 A1-02 = 4
Basic Control
Voltage/frequency
fixed ratio control
Voltage/frequency
fixed ratio control
with speed com-
pensation using a
PG
Current vector
control without a
PG
Current vector
control with a PG
Current vector
control without a
PG using a high-
performance mag-
netic flux and
speed estimator
(software)
Main Applications
Va r ia bl e s pe e d
control, particu-
larly for control of
multiple motors
with a single
Inverter and for
replacing existing
Inverters
Applications
requiring high-
precision speed
control using a PG
on the machine
side
Variable speed
control, applica-
tions requiring
high performance
without a PG on
the motor side,
and for replacing
open-loop vector
control of the pre-
vious VS-616G5.
Very high-perfor-
mance control
with a PG on the
motor side (sim-
ple servodrives,
high-precision
speed control,
torque control, and
torque limiting)
Very high-perfor-
mance control
without a PG on
the motor side
(such as simple
servodrives,
torque control, and
torque limiting),
and function appli-
cations between
flux vector and
open-loop vector 1
control.
PG Speed Control Board
(Option)
Not required.
Required (PG-A2
or PG-D2).
Not required.
Required (PG-B2
or PG-X2).
Not required.
Basic
Perfor-
mance
Speed Control
Range
*1
1:40 1:40 1:100 1:1000
1:200
*13
Speed Control
Accuracy
*2
±2 to 3% ±0.03% ±0.2% ±0.02% ±0.2%
Speed
Response
*3
Approx. 1 Hz Approx. 1 Hz 5 Hz 40 Hz 10 Hz
Maximum
Output Fre-
quency
400 Hz 400 Hz 400 Hz 400 Hz 60 Hz, 120 Hz
Starting
Torque
*4
150%/3 Hz 150%/3 Hz 150%/1 Hz
150%/0 min
−1
150%/0.3 Hz
TOE-S616-60.1.book 2 ページ ２０１７年８月４日 金曜日 午後３時４１分

YASKAWA Varispeed G7 Series Specifications

General

Brand	YASKAWA
Model	Varispeed G7 Series
Category	Inverter
Language	English