Powtran PI9000 series - Page 127

Chapter 5 Function parameter
121
This group of function code is only valid to V/F control, invalid to vector control.
V/F control is suitable for fans, pumps and other universal loads, or one inverter
with multiple motors, or for the applications that inverter power is significantly different
from the motor power.
Code
Parameter name
Setting range
Factory
setting
Change
Limit
F4.00
V/F curve setting
Linear V/F
0
0
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Multi-point V/F
1
Square V/F
2
1.2th power V/F
3
1.4th power V/F
4
1.6th power V/F
6
1.8th power V/F
8
Reserve
9
V/F completely
separate
10
V/F half separate
11
0: linear V/F
Suitable for ordinary constant torque load.
1: multi-point V/F
Suitable for dehydrator, centrifuge and other special loads any V/F relationship curves
can be obtained by setting parameters F4.03 to F4.08.
2: square V/F
Suitable for fans, pumps and centrifugal loads.
3 to 8: V/F relationship curve between linear V/F and square V/F.
10:VF separate completely mode. In this mode, the output frequency and output voltage
is separated completely, no any relationship at all, the output frequency controlled by
frequency source setting , but output voltage determined by F4.12 setting.(V/F separate
voltage supply source )
V/F separated completely mode can suitable for in inductive heating, inverter power
supply, torque motor, etc applications.
11: V/F semi-separate mode.
V is proportional to F in this mode, but the proportional relationship can be set by F4.12
parameters, furthermore, the V and F proportion also relate to rated voltage of motor and
rated frequency in b0 group.
Assume that input voltage source is X ( X value range from 0~100%), the output
voltage V and output frequency F proportion relationship can be defined as : V/F=2*X*
（rated voltage of motor）/（rated frequency of motor）
F4.01
Torque boost
0.0%: automatic torque
boost
0.1% to 30.0%
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