Chroma 66203 - Efficiency Test for AC Motor Driver

Operation
4-5
4.3.2 Efficiency Test for AC Motor Driver
When using the 66204 Digital Power Meter to test the AC motor driver’s efficiency, the driver
will convert the single phase power to 3-phase power output in order to drive the motor.
Following is the installation and setup procedure.
Wiring
1. To determine the wiring mode for 66204 and the 3-phase power system of motor driver
secondary side, it can be 3P3W (two wattmeter method) or 3P4W (three wattmeter
method). If 3P3W wiring mode is selected, it can decide the wiring distribution of each
channel (wattmeter) on the 66204 Digital Power Meter for efficiency test as the figure
shown below. See the detail description in section 4.6.2 for the application of efficiency
test and se
ction 4.7 for wiring mode.
Figure 4-8 Power Meter Configuration for Testing Motor Driver’s Efficiency
%100%100
4
21
×
+
=×=
W
WW
powerinput
poweroutput
Efficiency
2. Wiring for testing 66204:
Figure 4-9 Wiring Diagram of 66203/66204 & Motor Driver for Efficiency Test