Asymmetric Charge Transfer Scheme Model in ML-SSHC with Consistent Power Extraction Improvement for Piezoelectric Energy Harvesters

This paper demonstrates an asymmetric charge transfer scheme model for bias-flipping in multilevel synchronized switch harvesting on capacitor (ACT ML-SSHC). The asymmetric charge transfer model maintains consistent power extraction improvement (PEI) across various piezoelectric energy harvester specifications without having to reconfigure the control parameters of the circuit. Consistency in PEI is also demonstrated for different N-levels with an upper bound of N=3. The resulting PEI has a maximum range of 2.40-3.52 for N=1.