Auto-Tuning and Variable Frequency Drives - 6

It also may be helpful to do
some pre-tune and post-tune
measurements. Try using the VFD's
built in monitoring displays to
complete a table with pre and post
monitor values (see Table 1)
If auto-tuning successfully adjusted
the VFD from factory default settings,
then all of the values in the post-tune
will be lower than the pre-tune, with
the exception of the DC bus voltage,
which at steady state will mostly stay
constant.
Frequency (Hz)
Monitor
6
10
Pre- and post-tune
measurements are a
good way to validate
the effectiveness of
your auto-tune
20
30
40
50
60
Output Current
Monitor
Amps
Amps
Amps
Amps
Amps
Amps
Amps
Another way to compare pre- and
post-tuning performance is through
free trending software offered by
many manufacturers with their Drive
Tools Software. (see Figure 2)
These baselines help with seeing
any differences in performance
and can be a benchmark for future
comparisons.
Output Voltage
Monitor
Vac
Vac
Vac
Vac
Vac
Vac
Vac
Table 1: Typical data to collect for pre- and post auto-tune monitoring
DC Bus Voltage
Monitor
Vdc
Vdc
Vdc
Vdc
Vdc
Vdc
Vdc
Figure 2: Many manufacturers offer free trending software to compare pre- and post
tuning performance
6 | Auto-tuning and Variable Frequency Drives

Auto-Tuning and Variable Frequency Drives

Table of Contents for the Digital Edition of Auto-Tuning and Variable Frequency Drives

Auto-Tuning and Variable Frequency Drives - 1
Auto-Tuning and Variable Frequency Drives - 2
Auto-Tuning and Variable Frequency Drives - 3
Auto-Tuning and Variable Frequency Drives - 4
Auto-Tuning and Variable Frequency Drives - 5
Auto-Tuning and Variable Frequency Drives - 6
Auto-Tuning and Variable Frequency Drives - 7
Auto-Tuning and Variable Frequency Drives - 8
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