Load Pattern Selection (Pr. 14) - Mitsubishi Electric FR-E700 Instruction Manual

Set V/F pattern
6.5.2

Load pattern selection (Pr. 14)

You can select the optimum output characteristic (V/F characteristic) for the application and load
characteristics.
Pr. No. Name
14
Load pattern selection
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.
6 - 58
Initial Value Setting Range Description
0 For constant torque load
1 For variable torque load
For constant torque elevators (at reverse
0
2
rotation boost of 0%)
For constant torque elevators (at forward
3
rotation boost of 0%)
Pr. 3 Base frequency
Output frequency
Pr. 3 Base frequency
Output frequency
Parameters referred to
0 Torque boost
46 Second torque boost
3 Base frequency
178–184 Input terminal function
selection
General-purpose
magnetic flux vector
control
Advanced magnetic flux
vector control
Fig. 6-14:
Constant-torque load
Fig. 6-15:
Variable-torque load
Parameter
Refer to
Section
6.3.1
6.3.1
6.5.1
6.10.1
6.3.3
6.3.2
I001322C
I001323C