Chapter 6 - Parameter Description [FU1]
93
[Auto Torque Boost]: Inverter outputs high starting
torque by automatic boosting according to the load.
☞ Note: Auto torque boost is only available for the 1
st
motor.
Manual torque boost must be used for the 2
nd
motor.
☞ Note: The auto torque boost value is added to the
manual torque boost value.
☞ Note: Auto torque boost is available only when FU2-40
[Control Mode] is set to ‘V/F’.
☞ Note: Conduct Auto tuning in FU2-41 [Auto tuning] to use
Auto torque boost effectively.
[Constant Torque Loads: Conveyor, Moving Equip. etc.]
[Ascending and Descending Loads: Parking, Hoist etc.]
FU1-29: Volts/Hz Pattern
This is the pattern of voltage/frequency ratio. Select the
proper V/F pattern according to the load. The motor
torque is dependent on this V/F pattern.
[Linear] pattern is used where constant torque is
required. This pattern maintains a linear volts/frequency
ratio from zero to base frequency. This pattern is
appropriate for constant torque applications.
[Square] pattern is used where variable torque is
required. This pattern maintains squared volts/hertz ratio.
This pattern is appropriate for fans, pumps, etc.
[User V/F] pattern is used for special applications. Users
can adjust the volts/frequency ratio according to the
application. This is accomplished by setting the voltage
and frequency, respectively, at four points between
starting frequency and base frequency. The four points
of voltage and frequency are set in FU1-30 through FU1-
37.
[V/F Pattern: ‘Linear’]
[V/F Pattern: ‘Square’]
[V/F Pattern: ‘User V/F’]
Output Voltage
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