Triple Hybrid Energy Harvesting Interface Electronics

2016-12-09
Ulusan, H.
Chamanian, S.
Pathirana, W. M. P. R.
Zorlu, O.
Muhtaroglu, A.
Külah, Haluk
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 k Omega (10 mu W) 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.
Citation Formats
H. Ulusan, S. Chamanian, W. M. P. R. Pathirana, O. Zorlu, A. Muhtaroglu, and H. Külah, “Triple Hybrid Energy Harvesting Interface Electronics,” 2016, vol. 773, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/46910.