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V/f Pattern Settings (E1-03)
The drive uses a V/f pattern to adjust the output voltage relative to the frequency reference. There are 15 different predefined
V/f patterns (setting 0 to E) from which to select, each with varying voltage profiles, saturation levels (frequency at which
maximum voltage is reached), and maximum frequencies. Additionally, one custom V/f pattern is available (setting F) that
requires the user to create the pattern using parameters E1-04 through E1-10.
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E1-03: V/f Pattern Selection
Selects the V/f pattern for the drive and motor from 15 predefined patterns or creates a custom V/f pattern.
No.
Parameter Name
Setting Range
Default
E1-03
V/f Pattern Selection
0 to F
F
<1> Parameter is not reset to the default value when the drive is initialized using A1-03.
Setting a Predefined V/f Pattern (Setting 0 to E)
Choose the V/f pattern that best meets the application demands from
. These settings are available only in
V/f Control modes. Set the correct value to E1-03. Parameters E1-04 to E1-13 can only be monitored, not changed.
Note:
1.
Setting an improper V/f pattern may result in low motor torque or increased current due to overexcitation.
2.
Drive initialization does not reset parameter E1-03.
Table 4.14 Predefined V/f Patterns
Setting
Specification
Characteristic
Application
0
50 Hz
Constant torque
For general purpose applications. Torque remains constant
regardless of changes to speed.
1
60 Hz
2
60 Hz (with 50 Hz base)
3
72 Hz (with 60 Hz base)
4
50 Hz, Variable torque 1
Variable torque
For fans, pumps, and other applications where the required
torque changes as a function of the speed.
5
50 Hz, Variable torque 2
6
60 Hz, Variable torque 1
7
60 Hz, Variable torque 2
8
50 Hz, mid starting torque
High starting torque
Select high starting torque when:
• Wiring between the drive and motor exceeds 150 m.
• A large amount of starting torque is required.
• An AC reactor is installed.
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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
Output voltage is constant when operating at greater than
60 Hz.
D
120 Hz (with 60 Hz base)
E
180 Hz (with 60 Hz base)
F
60 Hz
Constant torque
For general purpose applications. Torque remains constant
regardless of changes to speed.
to E1-13 are the same as those of setting 1.
The following tables show details on predefined V/f patterns.
Predefined V/f Patterns for Models 2A0004 to 2A0021, 4A0002 to 4A0011, and 5A0003 to 5A0009
The values in the following graphs are specific to 200 V class drives. Double the values for 400 V class drives. Multiply the
values by 2.875 for 600 V drives.
Table 4.15 Constant Torque Characteristics, Settings 0 to 3
Setting = 0
50 Hz
Setting = 1
60 Hz
Setting = 2
60 Hz
Setting = 3
72 Hz
0
9
200
1.3 2.5
50
15
V
oltage (V)
Frequency (Hz)
0
9
15
200
1.5 3
60
V
oltage (V)
Frequency (Hz)
0
9
15
200
1.5 3
60
50
V
oltage (V)
Frequency (Hz)
0
9
15
200
1.5 3
72
60
V
oltage (V)
Frequency (Hz)
4.6 Basic Drive Setup Adjustments
YASKAWA ELECTRIC TOEP YAIP1U 01B YASKAWA AC Drive - P1000 Quick Start Guide
103
4
Start-Up Programming & Operation
Summary of Contents for P1000
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