Varispeed G7 Control Methods; Control Methods And Features - YASKAWA varispeed G7 CIMR-G7B series Instruction Manual

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.
Control Method
Constant Setting
Basic Control
Main Applications
PG Speed Control Board
(Option)
Speed Control
*1
Range
Speed Control
Accuracy
Basic Speed
Perfor-
Response
mance
Maximum
Output Fre-
quency
Starting
Torque
-2
10
Table 10.1 Overview and Features of Control Methods
V/f Control with
V/f Control
A1-02 = 0
Voltage/frequency
fixed ratio control
Voltage/frequency
fixed ratio control
pensation using a
Variable speed
control, particu-
larly for control of
multiple motors
with a single control using a PG
Inverter and for
replacing existing
Inverters
Required (PG-A2
Not required.
1:40
±2 to 3%
*2
Approx. 1 Hz
*3
400 Hz
150%/3 Hz
*4
Open-loop Vec-
PG tor 1 Control
A1-02 = 2
A1-02 = 1
(factory setting)
Current vector
with speed com- control without a
PG
PG
Variable speed
control, applica-
Applications tions requiring
requiring high- high performance
precision speed without a PG on
the motor side,
on the machine and for replacing
side open-loop vector
control of the pre-
vious VS-616G5.
Not required.
or PG-D2).
1:40 1:100
±0.03% ±0.2%
Approx. 1 Hz 5 Hz
400 Hz 400 Hz
150%/3 Hz 150%/1 Hz
Flux Vector Con- Open-loop Vec-
trol tor 2 Control
A1-02 = 3 A1-02 = 4
Current vector
control without a
PG using a high-
Current vector
performance mag-
control with a PG
netic flux and
speed estimator
(software)
Very high-perfor-
mance control
Very high-perfor- without a PG on
mance control the motor side
with a PG on the (such as simple
motor side (sim- servodrives,
ple servodrives, torque control, and
high-precision torque limiting),
speed control, and function appli-
torque control, and cations between
torque limiting) flux vector and
open-loop vector 1
control.
Required (PG-B2
Not required.
or PG-X2).
1:200 (1:10 on
1:1000
regenerative side)
±0.02% ±0.2%
40 Hz 10 Hz
400 Hz 60 Hz, 120 Hz
−1
150%/0.3 Hz
150%/0 min