A self-powered and efficient rectifier for electromagnetic energy harvesters

Creative Commons License

ULUŞAN H., Zorlu Ö., Muhtaroʇlu A., KÜLAH H.

13th IEEE SENSORS Conference, SENSORS 2014, Valencia, İspanya, 2 - 05 Kasım 2014, cilt.2014-December, ss.182-185 identifier

  • Yayın Türü: Bildiri / Tam Metin Bildiri
  • Cilt numarası: 2014-December
  • Doi Numarası: 10.1109/icsens.2014.6984963
  • Basıldığı Şehir: Valencia
  • Basıldığı Ülke: İspanya
  • Sayfa Sayıları: ss.182-185
  • Anahtar Kelimeler: Electromagnetic power generation, Low voltage AC/DC conversion, Self-powered rectifier, Vibration-based energy harvesting
  • Orta Doğu Teknik Üniversitesi Adresli: Evet

Özet

This paper presents an interface circuit for efficient rectification of voltages from electromagnetic (EM) energy harvesters operating with very low vibration frequencies. The interface utilizes a dual-rail AC/DC doubler which benefits from the full cycle of the input AC voltage, and minimizes the forward bias voltage drop with an active diode structure. The active diodes are powered through an AC/DC quadrupler with diode connected (passive) transistors. The interface system has been validated to drive 22 μA load at 1.1 V, with 86% efficiency, when 0.1g vibration is applied to an in house energy harvester at 8 Hz. The circuit is functional down to 150 mV input. The rectified voltage deviates at most 38 mV from the theoretical value of twice the input peak voltage. The system was demonstrated for feasibility in portable applications through a prototype placed to the waist of a jogger.