Table 4.6 V/f Pattern Examples
Setting
Example
Specification Characteristic Application
0 50 Hz
Constant torque
For general purpose applications, torque
remains constant regardless of speed changes.
1
60 Hz
(default setting)
2
60 Hz
(with 50 Hz base)
3
72 Hz
(with 60 Hz base)
4
50 Hz
Heavy Duty 3
Reduced or
variable torque
For applications where torque changes with the
speed like fans, pumps, and others that
require
reduced torque relative to the load.
5
50 Hz
Heavy Duty 2
6
60 Hz
Heavy Duty 3
7
60 Hz
Heavy Duty 2
8
50 Hz
mid starting torque
High starting
torque
High starting should be selected only when:
• Wiring between the drive and motor
exceeds 150 m
• Large amount of starting torque
is required
• AC reactor is installed
• Motor exceeds the largest motor
recommended for that drive used
9
50 Hz
high starting torque
A
60 Hz
mid starting torque
B
60 Hz
high starting torque
C
90 Hz
(with 60 Hz base)
Constant output
When operating at speeds greater than 60 Hz
motor requires constant voltage.
When operating at speeds greater than 60 Hz
motor operates in constant power range.
D
120 Hz
(with 60 Hz base)
E
180 Hz
(with 60 Hz base)
n
V/f Pattern Characteristics
These graphs apply to 200 V class drives; double the values for 400 V class drives.
•
Constant Torque Characteristics
4.5 Basic Operation
YASKAWA ELECTRIC TOEP C710606 25B YASKAWA AC Drive J1000 Installation & Start-Up Manual
101
4
Start-Up Programming
& Operation
2/6/2008-14:44
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