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Robust Safety Circuits for DC Powered Home Appliances in Transient State

  • Ahn, Jung-Hoon ;
  • Kim, Yun-Sung ;
  • Lee, Byoung-Kuk
  • Received : 2013.11.25
  • Accepted : 2014.05.28
  • Published : 2014.11.01

Abstract

In this paper, for the development of a safe and reliable DC home appliance suitable for DC home power supply system, we classified a number of inherent problems with help of the comparative analysis of existing AC and new DC home appliance. Several new technical problems of DC home appliances are mainly linked to the DC transient state. Among them, this paper concentrates on start-up inrush current problem, uni-polarity problem, and heavy DC load control problem. And to address these problems, we herein present an implementation of robust safety circuits for DC home appliances. Specifically, we investigate several multi-circuit countermeasures and select the best among them through comparative evaluation, based on theoretical, simulational, and experimental results.

Keywords

DC home power supply system;DC home distribution system;DC home appliance;startup inrush current

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