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9. Basic functions
9-17 SV-iC5
Manual Torque Boost
Group LED display Parameter name
Set
Value
Min/Max
range
Factory
defaults
Unit
F27 [Torque boost select] 0
0/1 0
F28
[Torque boost in forward
direction]
Function
group 1
F29
[Torque boost in reverse
direction]
- 0/15 5 %
Set F27 to 0 {Manual torque boost}.
The values of [Torque boost in forward/reverse direction] are set separately in F28 and F29.
CAUTION
If the boost value is set much higher than required, it may cause motor overheating due to over-
energizing.
Auto Torque Boost
Group LED Display Parameter Name
Set
Value
Min/Max
Range
Factory
Defaults
Unit
Function
group 1
F27 [Torque boost select] 1
0/1 0
H34
[No Load Motor Current]
-
0.1/12 - A
H41
[Auto tuning]
0
0/1 0
Function
group 2
H42
[Stator resistance (Rs)]
-
0/5.0 -
Ω
Before Auto Torque Boost setting, H34 and H42 should be set correctly (See page 10-6, 10-8).
Set F27 to 1 {Auto torque boost}.
The inverter automatically boosts the output voltage by calculating torque boost value using motor parameters.
FX
Time
RX
Voltage
FX torque
boost
No torque boost
100%
RX torque
boost