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Rockwell Automation Publication 35-UM001A-EN-P - May 2022
149
Chapter 7 Configure the Armor PowerFlex Drive
Configure Motor Control Mode
Control mode specifies what parameters the motor control in the device is
controlling. Basically it indicates the property or properties of the motor
output that are being actively managed by the motor control algorithms.
Armor PowerFlex drives use velocity control.
1. On the Motor Control page, choose a Motor Control Mode.
Volts/Hertz Control Mode
The Volts/Hertz Control Mode uses a a fixed relationship between frequency
and voltage, forming what is known as a "Volts per Hertz" curve. When you
select Volts/Hertz mode, you can adjust the Frequency Control settings to
influence the curve.
Figure 71 - Volts per Hertz Curve Example
2. On the Motor Control page, choose a Boost Select method.
Motor Control Mode
Description
Volts/Hertz
If you choose this mode, you can adjust the Frequency control settings as described in
Voltz/Hertz Control Mode See
Sensorless Vector
The motor is controlled using current feedback, assuming that the total current is the
vector sum of the torque- and flux-producing components. In this mode, you cannot
adjust the Frequency Control settings. See
Configure Advanced Motor Control
next steps.
Velocity Vector Control
(VVC)
A high-speed bandwidth regulator and adaptive controller are used to provide
continuous regulation of the motor speed and improved overall control.. It is
recommended to use an encoder when using VVC mode. In this mode, you cannot
adjust the Frequency Control settings. See
Configure Advanced Motor Control
, for next
steps.
Boost Select Types
Description
Custom V/Hz
Custom V/Hz allows a wide variety of patterns for the V/Hz ratio. The default
configuration is a straight line from zero to rated voltage and frequency. The volts/
hertz ratio can be changed to provide increased torque performance when required.
See
Variable
Variable frequency control selects a curve suitable for variable torque loads such as
fans and pumps. This type of curve has no starting / acceleration boost. See
.
Constant
Constant frequency control selects a curve suitable for constant torque loads such as
conveyors and compressors. See
Frequency,
max
Base Frequency,
(nameplate)
Break Voltage
Start Boost
Base Voltage
(nameplate)
Voltage, max
Break
Frequency