Relation Between Torque Boost And V/F Characteristics; Control Method (V/F Characteristics); Constant Torque Characteristics (Vc); Reduced Torque Characteristics (Vp 1.7Th Power) - Omron JX User Manual

Relation Between Torque Boost and V/f Characteristics

Determine the relation of output voltage against output frequency.
Parameter No. Function name
A041 Torque boost selection
*
A241 2nd torque boost selection
A042 Manual torque boost voltage
*
A242 2nd manual torque boost voltage
A043 Manual torque boost frequency
2nd manual torque boost
*
A243
A044 V/f characteristics selection
*
A244 2nd V/f characteristics selection
A045 Output voltage gain
A245 2nd output voltage gain
Related parameters
* To switch to the 2nd control, allocate 08 (SET) to the multi-function input terminal and then turn it on.

Control Method (V/f Characteristics)

Constant Torque Characteristics (VC)

•Ouput voltage is proportional to output frequency.
While proportional from 0 Hz to base frequency, the output voltage is constant from base to
maximum frequencies regardless of the frequency.

Reduced Torque Characteristics (VP 1.7th power)

•Suitable for a fan or pump that does not require large torque in a low speed range.
These provide high efficiency, reduced noise and vibration, owing to reduced output voltage in a
low speed range.
00: Manual torque boost
01: Automatic (simple) torque boost
0.0 to 20.0
(Ratio to the value of AVR voltage
selection A082)
0.0 to 50.0
(Ratio to base frequency)
frequency
00: Constant torque characteristics
(VC)
01: Reduced torque characteristics
(VP 1.7th power)
06: Special reduced torque
characteristics (Special VP)
20. to 100.
Output
voltage
(100%)
0
Base frequency
(A003/A203)
Output
voltage
VP (1.7th
(100%)
power of VP)
0
Base frequency
(A003/A203)
Data
A082, H003/H203, H004/H204
Output
frequency (Hz)
Max. frequency
(A004/A204)
Output
frequency (Hz)
Max. frequency
(A004/A204)
4-2 Function Mode
Default setting Unit
⎯
00
5.0
%
0.0
2.5
%
0.0
⎯
00
100. %
4-15
4