Triple Hybrid Energy Harvesting Interface Electronics

16th International Conference on Micro and Nanotechnology for Power Generation and Energy Conversion Applications

物理学;能源学

Uluan, H.^1 ; Chamanian, S.^1 ; Pathirana, W.M.P.R.^2 ; Zorlu, Ö.^3 ; Muhtarolu, A.^2 ; Külah, H.^1

METU, Department of Electrical and Electronics Engineering, Ankara, Turkey^1

METU Northern Cyprus Campus, Department of Electrical and Electronics Engineering, Güzelyurt, Mersin

10, Turkey^2

Mikro Biyosistemler Inc., Ankara, Turkey^3

关键词: Differential inductors;    Forward bias voltage;    Hybrid energy harvesting;    Independent sources;    Interface electronics;    Negative-voltage-converter;    Power management circuits;    Standard CMOS technology;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/773/1/012027/pdf
DOI  :  10.1088/1742-6596/773/1/012027

来源: IOP

【 摘 要 】

This study presents a novel triple hybrid system that combines simultaneously generated power from thermoelectric (TE), vibration-based electromagnetic (EM) and piezoelectric (PZT) harvesters for a relatively high power supply capability. In the proposed solution each harvesting source utilizes a distinct power management circuit that generates a DC voltage suitable for combining the three parallel supplies. The circuits are designed and implemented in 180 nm standard CMOS technology, and are terminated with a schottky diode to avoid reverse current flow. The harvested AC signal from the EM harvester is rectified with a self-powered AC-DC doubler, which utilizes active diode structures to minimize the forward- bias voltage drop. The PZT interface electronics utilizes a negative voltage converter as the first stage, followed by synchronous power extraction and DC-to-DC conversion through internal switches, and an external inductor. The ultra-low voltage DC power harvested by the TE generator is stepped up through a charge-pump driven by an LC oscillator with fully- integrated center-tapped differential inductors. Test results indicate that hybrid energy harvesting circuit provides more than 1 V output for load resistances higher than 100 kΩ (10 μW) where the stand-alone harvesting circuits are not able to reach 1 V output. This is the first hybrid harvester circuit that simultaneously extracts energy from three independent sources, and delivers a single DC output.