YASKAWA G7 Series Technical Manual page 98

Setting the Control Method
Any of the following five control methods can be set.
Control Mode
V/f control
V/f control with PG
Open-loop vector
control 1
Flux vector control
Open-loop vector
control 2
Note With vector control, the motor and Drive must be connected 1:1. The motor capacity for which stable control is possible is 50% to 100% of the capacity
of the Drive.
PG Control without PG (A1-02 = 0)
Set either one of the fixed patterns (0 to E) in E1-03 (V/f Pattern Selection) or set F in E1-03 to specify a
•
user-set pattern as required for the motor and load characteristics in E1-04 to E1-13 in advanced program-
ming mode.
Simple operation of a general-purpose
motor at 50Hz:
Simple operation of a general-purpose
motor at 60Hz:
Perform stationary autotuning for the line-to-line resistance only if the motor cable is 50 m or longer for
•
the actual installation or the load is heavy enough to produce stalling. Refer to the following section on
Autotuning for details on stationary autotuning.
V/f Control with PG (A1-02 = 1)
Set either one of the fixed patterns (0 to E) in E1-03 (V/f Pattern Selection) or set F in E1-03 to specify a
•
user-set pattern as required for the motor and load characteristics in E1-04 to E1-13 in advanced program-
ming mode.
Simple operation of a general-purpose
motor at 50Hz:
Simple operation of a general-purpose
motor at 60Hz:
Set the number of motor poles in E2-04 (Number of Motor Poles)
•
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Parameter
Basic Control
Setting
A1-02 = 0 Voltage/frequency ratio fixed control
Voltage/frequency ratio fixed control
A1-02 = 1
with speed compensation using a PG
A1-02 = 2
Current vector control without a PG
(factory setting)
A1-02 = 3 Flux vector control
Current vector control without a PG
with an ASR (speed controller)
A1-02 = 4
(Always perform rotational autotun-
ing.)
Main Applications
Variable speed control, particularly
control of multiple motors with one
Drive and replacing existing drives
Applications requiring high-precision
speed control using a PG on the
machine side
Variable speed control, applications
requiring speed and torque accuracy
using vector control without a PG
Very high-performance control with a
PG (simple servo drives, high-preci-
sion speed control, torque control, and
torque limiting)
Very high-performance control with-
out a PG (torque control without a PG,
torque limiting, applications requiring
a 1:200 speed control range without a
PG)
E1-03 = 0
E1-03 = F (default) or 1
If E1-03 = F, the default setting in the user setting from
E1-04 to E1-13 are for 60Hz
E1-03 = 0
E1-03 = F (default) or 1
If E1-03 = F, the default setting in the user setting from
E1-04 to E1-13 are for 60Hz