n
V/f Pattern Setting Examples
This section provides examples of how to set a V/f pattern using E1-04 to E1-10.
Table 4.7 V/f Pattern Examples
Example Specification Characteristic Application
A 50 Hz
Constant torque
For general purpose applications. Torque
remains
constant
regardless
of
changes
to
speed.
B 60 Hz (default setting)
C 60 Hz (with 50 Hz base)
D 72 Hz (with 60 Hz base)
E 50 Hz, Heavy Duty 2
Derated torque
For fans, pumps, and other applications
that
require
torque
derating
relative
to
the
load.
F 50 Hz, Heavy Duty 1
G 50 Hz, Heavy Duty 1
H 50 Hz, Heavy Duty 2
I 50 Hz, mid starting torque
High starting torque
Select high starting torque when:
•
Wiring between the drive an motor
exceeds 150 m
•
A large amount of starting torque is
required
•
An AC reactor is installed
J 50 Hz, high starting torque
K 60 Hz, mid starting torque
L 60 Hz, high starting torque
M 90 Hz (with 60 Hz base)
Constant output
When operating at greater than 60 Hz the
output voltage will be constant.
N 120 Hz (with 60 Hz base)
O 180 Hz (with 60 Hz base)
The following tables show details on V/f patterns.
The following graphs are for 200 V
class drives. Double the values when using a 400 V class
drive.
V/f Pattern Examples
Table 4.8 Constant Torque Characteristics, Examples A to D
Example A 50 Hz Example B
60 Hz
(default)
Example C 60 Hz Example D 72 Hz
0
12
200
1.3 2.5 50
16
Voltage (V)
Frequency (Hz)
0
12
16
200
1.5 3 60
Voltage (V)
Frequency (Hz)
0
12
16
200
1.5 3 6050
Voltage (V)
Frequency (Hz)
0
12
16
200
1.5 3 7260
Voltage (V)
Frequency (Hz)
4.5 Basic Operation
108
YASKAWA ELECTRIC TOEP C710606 25D YASKAWA AC Drive J1000 Installation & Start-Up Manual
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