TIDT292 June   2022

 

  1.   Description
  2.   Features
  3.   Applications
  4. 1Test Prerequisites
    1. 1.1 Voltage and Current Requirements
    2. 1.2 Required Equipment
    3. 1.3 Dimensions
    4. 1.4 Test Setup
  5. 2Testing and Results
    1. 2.1 Efficiency Graphs
    2. 2.2 Efficiency Data
    3. 2.3 Power Factor and iTHD Versus Load, VAC and Frequency
      1. 2.3.1 Power Factor and iTHD Tables
    4. 2.4 Thermal Image
    5. 2.5 Bode Plots
    6. 2.6 Input AC Current Measurements: Compliance to DO160 Harmonic Limits
  6. 3Waveforms
    1. 3.1 Switching
    2. 3.2 Output Voltage Ripple
    3. 3.3 AC Waveforms (Input Voltage and Current, PFC Output Voltage)
    4. 3.4 Load Transients
    5. 3.5 Inrush Current
    6. 3.6 Start-Up Sequence
    7. 3.7 Shutdown

2.3 Power Factor and iTHD Versus Load, VAC and Frequency

The power factor value was measured by varying the converter output power in the whole load range, for different VAC, repeated at 400-Hz and 800-Hz mains frequency.

GUID-20220527-SS0I-FZNL-8RFL-D96JSK40X8FB-low.jpg Figure 2-2 Power Factor Versus Output Power at 400 Hz
GUID-20220527-SS0I-3CZS-ZTHF-GNTNTCVXV8RS-low.jpg Figure 2-3 Power Factor Versus Output Power at 800 Hz
GUID-20220527-SS0I-M12K-CPBM-8DJQVFKWLTHP-low.jpg Figure 2-4 iTHD Versus Output Power at 400 Hz
GUID-20220527-SS0I-PWJM-6XL4-6TVQ0SVJRPJ0-low.jpg Figure 2-5 iTHD Versus Output Power at 800 Hz