• A new MPPT method for low-power solar energy harvesting 

      López Lapeña, Oscar; Penella López, María Teresa; Gasulla Forner, Manuel (2010-09)
      Article
      Accés obert
      This paper describes a new maximum-power-pointtracking (MPPT) method focused on low-power (< 1 W) photovoltaic (PV) panels. The static and dynamic performance is theoretically analyzed, and design criteria are provided. ...
    • A review of commercial energy harvesters for autonomous sensors 

      Penella López, María Teresa; Gasulla Forner, Manuel (2007-05-01)
      Text en actes de congrés
      Accés obert
      Current commercial autonomous sensors are mainly powered by primary batteries. Batteries need to be replaced and hence can become the largest and most expensive part of the system. On the other hand, our environment is ...
    • A simple and efficient MPPT method for low-power PV cells 

      Penella López, María Teresa; Gasulla Forner, Manuel (2014-01-01)
      Article
      Accés obert
      Small-size PV cells have been used to power sensor nodes. These devices present limited computing resources and so low complexity methods have been used in order to extract the maximum power from the PV cells. Among them, ...
    • Powering wireless sensor nodes: primary batteries versus energy harvesting 

      Penella López, María Teresa; Albesa, Joan; Gasulla Forner, Manuel (IEEE, 2009-05-31)
      Text en actes de congrés
      Accés obert
      Wireless sensor networks (WSNs) are increasingly used in many fields. Still, power supply of the nodes remains a challenge. Primary batteries are mainly used but energy harvesting offers an alternative, although not free ...
    • Runtime extension of low-power wireless sensor nodes using hybrid-storage units 

      Penella López, María Teresa; Gasulla Forner, Manuel (2010-03)
      Article
      Accés obert
      The sensor nodes of wireless sensor networks remain inactive most of the time to achieve longer runtimes. Power is mainly provided by batteries, which are either primary or secondary. Because of its internal impedance, a ...