User Manual

Application examples
The PWM Mode is n
ot required for the input line frequency measurements.
The PWM Mode and other modes are described under the Modes section.
(See page 42, Modes.)
8. To enable sum measurements for the three phase output on group B, enable the
Sum Results column by entering the Main Menu and going to Measurement
Configuration → Sum Results Column → Enabled.
9. To make the efficiency measurements, enable the Math function by pressing
andthenpr
essing the MATH soft key.
10. 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 h elp in formatting the
function or refer to the information earlier in this manual. (See page 56, Math
results.)
11. 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.
12. 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.
13. Press
to view the Results screen.
14. To view selected math formulas, press
.
15. 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.
F
urther settings if required
T
orque and speed inputs. The overall efficiency of a motor drive system requires
measuring real-time speed and torque data. PA3000 has four a nalog and two
counter inputs to enable various auxiliary input measurements such as torque
and speed. More information on specifications of this inputs can be found under
Auxiliary inputs and output section of this manual. (See page 149, Auxiliary
inputs/outputs.)
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