40
4. Parameter description
Parameter
4.1
Torque Boost (P.0, P.46)
P.0 “Torque boost”
P.46 “The second torque boost”
Related parameters
P.19
“
Base frequency voltage
”
P.80~P.84 , P.86
“
Multi-function terminals selection
”
P.3
“
Base frequency
”
P.47
“
The second base frequency
”
● For an inverter controlled by V/F mode, when the motor starts up, the output voltage of the inverter
is so inadequate that the starting torque is usually inadequate.
In this case, the output voltage can
be improved by properly setting the torque boost (P.0), and thus a better starting torque can be
acquired.
Parameter
Factory setting
Setting range
Remarks
0
6%(0.2Kw~0.75Kw)
0~30%
---
4%(1.5Kw~3.7Kw)
3%(5.5Kw~7.5Kw)
2%(11Kw)
46
9999
0~30%, 9999
9999: function invalid
the set value of
P.0
、
P.46
Output
voltage
Base frequency
Output frequency
100
％
<Setting>
• If P.0=6% and P.19=220V, and when output frequency of the inverter is 0.2Hz, the output voltage
is:
0.2Hz
50Hz
+
P.0
(
)
P.19
×
=
220V
×
0.004
+
(
)
6%
=
14.08V
• If RT is ‘on’, P.46 “The Second Torque Boost” is valid.
Note: 1. If the set value of P.0 is too high, it will result in the action of the current protection of the inverter or the
inverter will be disabling to start smoothly.
2. The Second Function is valid only when P.44≠9999.
3. RT referred in this paragraph is the name of ‘multi-functional control terminal’. For the selection of the
function and use of the multi-function control terminal, please refer to P.80~P.84, P.86. For the wiring,
please refer to section 2-5.
