Mitsubishi Electric FR-F800, Instruction Manual

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Parameters (G) Control parameters
FR-F800 5 - 519
5.13.3 Load pattern selection
Optimal output characteristics (V/F characteristics) for application or load characteristics can be se-
lected.
Application for constant-torque load (Pr. 14 = "0")
●
The output voltage will change linearly against the output frequency at the base frequency or
lower. Set this parameter when driving a load that has constant load torque even when the
rotation speed is changed, such as conveyor, dolly, or roll drive.
Pr. Name
Initial
value
Setting
range
Description
14
G003
Load pattern selection 1
0 For constant-torque load
1 For variable-torque load
Fig. 5-248:
Constant-torque load
I002750E
NOTE Select for constant-torque load (setting value "0") even for fan and pump in following cases.
●
When accelerating a blower with large moment of inertia (J) in a short period of time.
●
When it is a constant-torque load such as rotary pump or gear pump.
●
When the load torque increases in low speed such as screw pump.
V/F V/F V/F
100%
Output v
o
lt
ag
e
Pr. 3 Base frequency
Output frequency (Hz)