Realisation of DC/DC high power and large current combined power supply for airborne radar

Abstract

With the development of radar power supply system, the power density of DC/DC power supply is becoming larger and larger, but the volume is becoming smaller and smaller, which makes the power density of the power supply increase, and the combination of power modules needs to be optimised to realise the power supply of the whole system. Here, a modular design scheme is introduced, which adopts a three-layer combined structure, and finally realises the DC/DC combined power supply with a total power of 15.6 kW in the total height of 105 mm. The heat design of the power supply is reasonable, the rectangular liquid cooling channel is arranged inside the cooling plate of the chassis, the rectangular heat exchanger fin is added inside the liquid cooling channel with concentrated heat source, and the series-parallel technology is used in the liquid cooling channel inside the plate. The series reliability prediction model can meet the requirements of radar overall design. The project is difficult to implement, and more precise process is needed in practical engineering to strictly control it. The successful implementation of this scheme provides a reference for the realisation of similar radar products.

Keywords

• heat transfer
• airborne radar
• heat exchangers
• DC-DC power convertors
• reliability
• cooling
• radar power supply system
• power density
• power modules
• rectangular liquid cooling channel
• DC-DC power supply
• large current combined power supply
• airborne radar
• modular design scheme
• three-layer combined structure
• heat design
• cooling plate
• chassis
• rectangular heat exchanger fin
• liquid cooling channel
• concentrated heat source
• series-parallel technology
• series reliability prediction model
• radar overall design
• power 15.6 kW
• size 105.0 mm