A ZVS THREE-PORT DC-DC CONVERTER OF DISTRIBUTED POWER SUPPLY SYSTEM APPLIED IN SPACECRAFT

Wang Shanshan; Gao Ming; Shi Jianjiang

doi:10.19912/j.0254-0096.tynxb.2021-1376

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Acta Energiae Solaris Sinica ›› 2023, Vol. 44 ›› Issue (4) : 384-392. DOI: 10.19912/j.0254-0096.tynxb.2021-1376

A ZVS THREE-PORT DC-DC CONVERTER OF DISTRIBUTED POWER SUPPLY SYSTEM APPLIED IN SPACECRAFT

Wang Shanshan, Gao Ming, Shi Jianjiang

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Abstract

This paper proposes a zero-voltage-switching （ZVS） three-port DC-DC converter （TPC） for spacecraft power system. For the TPC which integrates interleaved Buck/Boost converter （IBBC） with dual-active-bridge DC-DC converter （DAB）, due to the ZVS range of MOSFET of the primary side is related to the power transmitted between the two ports of the primary side, in order to expand the ZVS range of the main switch, an auxiliary circuit based on coupled inductor is introduced into the topology. Compared with the traditional ZVS implementation method, this topology can prevent the notch on the current waveform of the battery port, which is beneficial to prolong the life of the battery in the spacecraft power system. The magnetic coupling inductor reduces the number of inductors, plays a filtering role, and provides the ZVS condition for the main switch. Finally, a TPC experimental prototype was built to verify the effectiveness of the topology structure and control strategy.

Key words

zero voltage switching / zero current switching / DC-DC converter / soft switching （power electronics） / distributed power supply system

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Wang Shanshan, Gao Ming, Shi Jianjiang. A ZVS THREE-PORT DC-DC CONVERTER OF DISTRIBUTED POWER SUPPLY SYSTEM APPLIED IN SPACECRAFT[J]. Acta Energiae Solaris Sinica. 2023, 44(4): 384-392 https://doi.org/10.19912/j.0254-0096.tynxb.2021-1376

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