Thermal Design, Analysis and Packaging of an Airborne Multi-output Power Supply Unit

  • Sogunuru Annapurna DRDO-Centre for Airborne Systems, Bengaluru - 560 037
  • Pradapan Vikram DRDO-Centre for Airborne Systems, Bengaluru - 560 037
  • Suma Varughese DRDO-Centre for Airborne Systems, Bengaluru - 560 037
Keywords: Multi output power supply unit, Transmit and receive multi module, TRMM, Antenna system, Power device

Abstract

Design of airborne multi-output power supply unit (MOPS) is restricted by space, weight and predefined geometry of air flow path. The unit is cooled by ram air and hence, exposed to the extreme external thermal environment that changes typically from +55°C to -40°C, from ground to cruising altitude within a few minutes. Hence the design should meet the thermal requirements of the electronics inside the packaging adequately, for both the positive and negative extremities of the temperature, so that device limiting temperatures are not exceeded. At the same time, it must accommodate the necessary circuitry. Details of the thermal and mechanical design and performance of the MOPS unit at various altitudes, hot spot location, flow requirements and optimal heat sink design are presented in this paper.

Author Biographies

Sogunuru Annapurna, DRDO-Centre for Airborne Systems, Bengaluru - 560 037
Ms S.Annapurna received her BTech (Mechanical Engineering) in 1995 and MTech (Heat Power-Refrigeration &Air Conditioning) from J.N.T.U. College of Engineering, Anantapur, Andra Pradesh, in 2004. Presently she is working as Scientist at DRDO-Centre for Air Borne Systems, Bengaluru. Her areas of interest include: Electronics cooling, thermal design and analysis.
Pradapan Vikram, DRDO-Centre for Airborne Systems, Bengaluru - 560 037
Mr P. Vikram received his BTech (Mechanical Engineering) from Pondicherry Engineering College, in 2001 and ME (Aeronautical Engineering) from Madras Institute of Technology, Chennai, Tamil Nadu, in 2003. Presently he is working as Scientist at DRDO-Centre for Air Borne Systems, Bengaluru. His areas of interest are thermal design and analysis.
Suma Varughese, DRDO-Centre for Airborne Systems, Bengaluru - 560 037
Ms Suma Varughese received her MS(Engineering) from Indian Institute of Science, Bengaluru, in 2000. Presently she is working as Scientist and Program Director of Indian AEW&C system at DRDO-Centre for Air Borne Systems, Bengaluru.
Published
2018-04-16
How to Cite
Annapurna, S., Vikram, P., & Varughese, S. (2018). Thermal Design, Analysis and Packaging of an Airborne Multi-output Power Supply Unit. Defence Science Journal, 68(3), 235-240. https://doi.org/10.14429/dsj.68.12252
Section
Aeronautical Systems

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