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PA3000 Four-channel, Multi-phase AC/DC Power Analyzer
Efficiency Testing Three Phase Applications
DEMONSTRATION GUIDE
8. To make the efficiency measurements, enable the Math function by pressing
and
then pressing the MATH soft key.
9. Select the desired function to edit and press
to enter the options.
NOTE: The Edit Function can be used to edit any specific math formula. While in the edit
function, press
to enter the Help menu for help in formatting the function or refer to
the information earlier in this manual.
10. For the efficiency calculation, enter (GRPB:SUM:W/CH1:W)*100 and then press
.
Press to go back to the Math menu where the function can be renamed and units can
be added, if desired.
11. Go back to the Math menu and scroll down to the newly edited function and select the
function by pressing
. Select all functions that need to be displayed on the screen.
12. Press
to view the Results screen.
13. To view selected math formulas, press
.
14. To view math formulas along with other results, go back to the Results screen and
press multiple times until the math window appears at the bottom of the screen.
You are now ready to take efficiency measurements on a PWM Motor drive with single
phase input and three phase output.
FURTHER SETTINGS IF REQUIRED
Torque and Speed Inputs. The overall efficiency of a motor drive system requires measuring real-
time speed and torque data.
The PA3000 has four analog and two counter inputs to enable various auxiliary input measurements
such as torque and speed.
• Refer to the pin number for desired analog or counter input under Auxiliary inputs/outputs and
connect the signal (torque, speed, or others) directly to the respective pin on the AUXILIARY
INPUTS/OUTPUTS connector on the rear panel.
• The auxiliary inputs can be enabled and viewed through the math screen. Press
and
then press the MATH soft key to enter options. Select any desired function and edit function
as ANA1, ANA2, ANA3, or ANA4 for analog inputs and COUNT1 or COUNT2 for counter inputs
to enable and view auxiliary inputs on the screen.
• To view the math screen along with other results, press
multiple times until the math
window appears on the bottom of the display.
Data Logging. The logging feature allows you to log data over time for prolonged efficiency
testing involving load and source sweeps. Use the DATA OUT key to log data to any compatible
flash drive connected to the front panel USB connector. The actual logging interval can be changed
by pressing
and going to
Interfaces
USB Host Data Out. The log file will be saved as
a .csv file.
