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Transformer Rectifier Unit (TRU) and Auto-Transformer Rectifier Unit (ATRU)

Power Supplies and Systems

Excelitas designs and manufactures multi-phase transformer rectifier units and light weight auto-transformer rectifier units suitable for airborne and shipboard applications. TRUs are a high-reliability solution for applications requiring reduction of input line current harmonics, such as:

  • Avionics and aircraft systems
  • Military shipboard electronics

Key Features:

  • Standard 3-phase AC input voltages, 50/60 Hz, 400 Hz or 360-800 Hz (wild frequency)
  • 28V, 270V 320V or custom DC output voltages
  • Power levels 100 W to 25kW
  • High reliability with >100,000 hours mean time between failure (MTBF)
  • 15-phase (30-pulse) rectification requires less external filtering
  • Isolated design or weight-saving non-isolated “ATRU”

Electrical Performance:

  • Peak to peak output ripple <5% of output voltage
  • Power factor typically >.99
  • Designed to meet DO-160G and MIL-STD-1399 Section 300 harmonics
    • Environmental Conditions:

      • Baseplate temperature range of -55°C to +85°C