Lifasa SV030iH-2U, Manual, Page: 48 / 98

Chapter 5 - Parameter Description (Function Group)
46
[FUN 16] through [FUN 19].
[Auto Boost] pattern is used where high starting
torque is applications. This pattern will automatically
boost the torque by sensing load current. It has a high
torque characteristic at low speed. [Auto] pattern
cannot be used when operating several motors with
one inverter.
FUN 09: Manual Torque Boost – Forward
FUN 10: Manual Torque Boost - Reverse
FUN
¢º
Fwd boost
09 2 %
Setting Range: 0 to 20 %
Factory Default: 2 %
FUN
¢º
Fwd boost
10 2 %
Setting Range:
0 to 20 %
Factory Default: 2 %
[FUN 09] and [FUN 10] establish the level of torque
boost in the Forward and Reverse direction. These
functions are used to increase the output voltage to
the motor at low speeds for a higher V/F ratio loads
that require higher than normal starting torque.
n Note: If the torque boost is set higher than needed, it is
possible to over-flux or saturate the motor. This can result in
the motor overheating.
n Note: The manual torque boost value can be added to
“Linear” or “2.0” V/F pattern, but not to “User” or “Auto Boost”
V/F pattern.
[Linear V/F Pattern: ‘Torque Boost’]
[2.0 V/F Pattern: ‘Torque Boost’]
Output Voltage
Output
Frequency
Freq. Base
100%
User-2v
User-1v
User-1f
User-2f
Output Voltage
Output
Frequency
Freq. Base
100%
Manual
boost
value
Output Voltage
Output
Frequency
Freq. Base
100%
Manual
boost
value
Output Voltage
Output
Frequency
Freq. Base
100%
Manual
boost value
Auto
boost value
Output Voltage
Output
Frequency
Freq. base
100%
Manual
Boost value
Auto
Boost value
Auto Boost
FUN 08 [V/F Pattern]
Manual Boost FUN 09, FUN 10