Rockwell Automation Liqui-Flo AC GP Vector Drive Version 6.4 - Manual (Page 146)

4-64 LiquiFlo AC Drive, Software Reference Version 6.4
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Set H.018 = 0 for constant torque applications (such as extruders and conveyors).
Set H.018 = 1 for use with Reliance Electric RPM and XE AC motors. A special V/Hz
curve (with two different slopes) will provide wider constant torque capability and best
efficiency.
Set H.018 = 2 for centrifugal fan and pump motor applications.
Refer to figure 4.13.
H.018 Volts/Hertz Curve Type
This parameter
provides an
application-dependent
selection of nominal
motor voltage versus
frequency. This
selection is effective
from any control
source. Parameter Range: 0 = Linear V/Hz curve
1 = Optimized V/Hz curve
2 = Squared V/Hz curve
Default Setting: 0
Parameter Type: Configurable
Refer also to parameters: H.003 Torque Boost Voltage
Figure 4.13 – Volts/Hertz Curve Selection
Motor
Voltage
(H.000)
Volts
Hz
Motor
Base Frequency
(H.001)
Motor
Voltage
(H.000)
Volts
Hz
Motor
Base Frequency
(H.001)
Motor
Voltage
(H.000)
Volts
Hz
Motor
Base Frequency
(H.001)
Linear (0)
Optimized (1) Squared (2)