کنفرانس مهندسی برق ایران

صفحه اصلی / سی و چهارمین کنفرانس بین المللی مهندسی برق

An Enhanced Duty-Cycled Based MPPT PEH Scavenging Interface Circuit Using a Low-Profile Hybrid (FOCV+P&O) Scheme For a Fluctuating Vibration

نویسندگان :

Saman Shoorabi Sani¹

1- Research and Development Department Ararat Intelligent Electrical and Electromechanical Systems Company, Mashhad, Iran

کلمات کلیدی :

Maximum Power Point Tracking (MPPT،Duty Cycle-Based Perturb and Observe (P&O)،Piezoelectric Energy Harvester (PEH) Interface Circuit.

چکیده :

In this paper, a fundamental issue of the well-established duty cycle-based Perturb and Observe (P&O) scheme of Maximum Power Point Tracking (MPPT) Piezoelectric Energy Harvester (PEH) interface circuits is introduced and addressed. The issue occurs when the circuit is subjected to a change in the magnitude of the input vibration excitation, resulting in decreased energy extraction performance due to two factors: Dead Energy Zones (DEZs) and Systematic MPPT Offset (Δstandard). By introducing a hybrid Fractional Open Circuit Voltage (FOCV) and P&O scheme, the proposed circuit tries to mitigate the issue, increasing ηMPPT and FoMMOPIR. In the proposed low-profile integrated circuit, all of the comparison tasks required for the operation of the hybrid FOCV&P&O scheme are performed by the built-in AC/DC active rectifier’s comparator and a few switches. The proposed circuit is designed and simulated using a 180nm standard design kit. Post-layout simulations and post-simulation calculations reveal that for the fluctuation case study, the values of ɳHarvest, FoMMOPIR, and ɳMPPT are 68%, 7.5%, and 0.9%, respectively. For the periodic case study, the values of the ɳHarvest, FoMMOPIR, and ɳMPPT are 80%, 7.8, and 0.92, respectively.