Mitsubishi Electric fr-e700 series, Instruction Manual

Page: 212 / 608

Set V/F pattern Parameter
6 - 58
6.5.2 Load pattern selection (Pr. 14)
You can select the optimum output characteristic (V/F characteristic) for the application and load
characteristics.
The above parameter can be set when Pr. 160 "User group read selection" = 0.
For constant-torque load (Pr. 14 = 0, initial value)
At or less than the base frequency voltage, the output voltage varies linearly with the output frequen-
cy. Set this value when driving the load whose load torque is constant if the speed varies, e.g. con-
veyor, cart or roll drive.
For variable-torque load (Pr. 14 = 1)
At or less than the base frequency voltage, the output voltage varies with the output frequency in a
square curve. Set this value when driving the load whose load torque varies in proportion to the
square of the speed, e.g. fan or pump.
Pr. No. Name Initial Value Setting Range Description Parameters referred to
Refer to
Section
14
Load pattern selection 0
0 For constant torque load 0
46
3
178–184
Torque boost
Second torque boost
Base frequency
Input terminal function
selection
General-purpose
magnetic flux vector
control
Advanced magnetic flux
vector control
6.3.1
6.3.1
6.5.1
6.10.1
6.3.3
6.3.2
1 For variable torque load
2
For constant torque elevators (at reverse
rotation boost of 0%)
3
For constant torque elevators (at forward
rotation boost of 0%)
Fig. 6-14:
Constant-torque load
I001322C
Fig. 6-15:
Variable-torque load
I001323C
Pr. 3 Base frequency
Output frequency
Output v
oltage
Pr. 3 Base frequency
Output frequency
Output v
oltage