YASKAWA GA700 - Page 29

Receiving
1
1.3 Features and Advantages of Control Methods
YASKAWA ELECTRIC SIEP C710617 05F YASKAWA AC Drive GA700 Technical Manual 29
Table 1.7 OLV/PM, AOLV/PM, CLV/PM and EZOLV Features and Advantages of Control Methods
Control
Method
Selection
PM Open Loop
Vector Control
(OLV/PM)
PM Advanced
Open Loop Vector
Control
(AOLV/PM)
PM Closed Loop
Vector Control
(CLV/PM)
EZ Open Loop
Vector Control
(EZOLV)
Notes
Controlled
Motor
PM Motor
Induction Motors/
PM Motors/SynRM
(Synchronous
Reluctance
Motors)
-
Parameter
Settings
A1-02 = 5 A1-02 = 6 A1-02 = 7 A1-02 = 8 -
Basic Control
PM Open Loop
Vector Control (no
speed controller)
PM Open Loop
Current Vector
Control (with speed
controller)
PM Closed Loop
Current Vector
Control (with speed
controller)
Open Loop Current
Vector Control
-
Main
Applications
• General-purpose
variable speed
control for PM
motors
• Applications in
which a high level
of responsiveness
and accurate speed
control are not
necessary.
• General-purpose
variable speed
control for IPM
motors
• Applications in
which high-
precision speed
control and torque
limits are
necessary.
Very high-
performance PM
motor control with
motor encoders
Example: Torque
control and torque
limits
Low-speed torque
applications
Example: Fans and
pumps
-
PG Option
Card
Not necessary Not necessary Necessary (PG-X3) Not necessary -
Maximum
Output
Frequency
590 Hz 400 Hz 400 Hz 120 Hz -
Speed Control
Range
1:20 AM
1:20 AM
1:100
*1 *2 *3
1:1500 1:100
This is the range of
variable control.
When you connect and
operate motors in this
mode, think about the
increase in motor
temperature.
Starting
Torque
100% / 5% speed
100% / 5% speed
200% / 0 min
-1
*1
200% / 0 min
-1
*4
100% / 1% speed
This is the motor torque
that the drive can supply at
low speed during start-up
and the related output
frequency (rotation speed).
You must think about drive
capacity when a large
quantity of torque is
necessary at low speed.
Auto-Tuning
*5
Stationary, Stator
Resistance, Rotational
Stationary, Stator
Resistance, Rotational
Stationary, Stator
Resistance, Z-phase,
Rotational
Line-to-Line
Resistance
Automatically tunes
electrical motor
parameters.
Torque Limits
*5
No Yes Yes Yes
Controls maximum motor
torque to prevent damage
to machines and loads.
Torque
Control
*5
No Yes
*6
Yes No
Directly controls motor
torque to control tension
and other parameters.
Droop Control
*5
No No Yes No
Sets load torque slip for
motors. Distributes motor
loads.
Zero Servo
Control
*5
No No Yes No
Locks servos without an
external position controller
to prevent movement
caused by external force.