App-30 IM 760301-01E
• Setting the Synchronization Period When Measuring the Efficiency of a Power
Conversion Device
Power Transformer with Single-Phase Input and Single-Phase Output
If a device that converts single-phase AC power to single-phase DC power is
measured with input elements 1 and 2, set the synchronization source of input
elements 1 and 2 to the voltage (or current) on the AC power end. In the example
shown in the figure below, set the synchronization source of input element 1 and 2
to U1 (or I1).
In effect, the measurement periods of input element 1 (input end) and input
element 2 (output end) match, and the power conversion efficiency of the device
can be measured more accurately.
Power transformer
Input: AC power U1 and I1 Output: DC power U2 and I2
U1 (or I1)
Input element 1
Input element 2
Synchronization source setup example
Likewise, if a device that converts single-phase DC power to single-phase AC
power is measured with input elements 1 (DC end) and 2 (AC end), set the
synchronization source of input elements 1 and 2 to the voltage (or current) on the
AC power end (input element 2). In the example shown in the figure below, set the
synchronization source of input element 1 and 2 to U2 (or I2).
Power transformer
Input: DC power U1 and I1 Output: AC power U2 and I2
U2 (or I2)
Input element 1
Input element 2
Synchronization source setup example
Power Transformer with Single-Phase DC Input and Three-Phase AC Output
If the device that converts single-phase DC power to three-phase AC power is
connected and measured as shown on the next page, set the synchronization
source of all input elements to the same voltage and current of element 2 and 3 on
the AC power end.
In this example, set the synchronization source of input elements 1, 2, and 3 to U2
(or I2, U3, or I3). In effect, the measurement periods of the input signal and all
output signals match, and the power conversion efficiency of the power conversion
device can be measured more accurately.
• Single-phase DC power: Connect to input element 1.
• Three-phase AC power: Connect to input elements 2 and 3 using three-phase,
three-wire system.
Appendix 6 Setting the Measurement Period
To Next Page
Loading...
Need help?
General
