Rockwell Automation 20G PowerFlex 750-Series AC Drives - Manual (Page 24)

24 Rockwell Automation Publication 750-RM002B-EN-P - September 2013
Chapter 1 Drive Configuration
So plug in the numbers.
So 14 amps is realized when the voltage is 129.8 on the output. A drive with a
voltage rating of 240V AC could be selected.
Below is a waveform of voltage and current at a resistor. The output of the drive
runs through a sine wave filter. Then this is connected to a one to one
transformer. This output is then sent to a bridge rectifier giving us pure DC.
With the use of a feedback board and the drives PI loop, the voltage at the resistor
was steady even if the resistance changed while running.
Other
Setting the frequency acceleration time to zero results in the drive outputting a
DC voltage waveform.
If the frequency accel time is set between 0 and 1, this could trigger and anomaly
where the drive outputs a frequency not equal to the commanded frequency. The
V 14 5.35
Ч
1.73
Ч
129.8
= =
DC Voltage Resistor Current
Times
DC V
oltage
Re
sist
or
C
urr
en
t