Mitsubishi Electric FR-F820-00046, Instruction Manual

Page: 712 / 940

(G) Control parameters Parameters
5 - 540
Application for variable-torque load (Pr. 14 = "1", initial value)
●
The output voltage will change in square curve against the output frequency at the base frequen-
cy or lower. (1.75th-power curve for FR-F820-01540(37K) or higher, and FR-F840-00770(37K) or
higher.)
●
Set this parameter when driving a load with load torque change proportionally against the square
of the rotation speed, such as fan and pump.
Fig. 5-262:
Variable-torque load
I002751E
NOTE Pr. 14 will become enabled at the time of V/F control.
Parameters referred to
Pr. 0 Torque boost => page 5-535
Pr. 3 Base frequency => page 5-537
Pr. 178 to Pr. 182 (input terminal function selection) => page 5-285
100%
Output frequency (Hz)
Pr. 3 Base frequency
Ou
tp
u
t v
o
lt
a
g
e