Power Extraction From Direct Current Power Source

Patent Status: 

Patent Filed

Indian Patent Applicaton No: 


Date Filed: 



A converter-control arrangement with a buck converter which ensures arbitrary power evacuation, limited by maximum capacity, from individual dc voltage sources connected in a series string.

Key Features: 

  • A bi-directional power electronic interface module between the dc voltage source and the common wire connecting the dc voltage sources in series.
  • External load/sink is presented with a series connection of the output terminals of these interface modules.
  • Relative duration of conduction of each switch (source and load sides) decide the evacuated energy from the source.
  • A simple control is capable of ensuring arbitrary energy evacuation, subject to maximum capacity of the source and load, whichever is lower.


  • Series connection of dc power supplies to obtain high voltage dc.
  • Series connection of batteries allowing both controlled charging and discharging of each battery in the string at a rate commensurate with the health and SOC of that individual battery.

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