Piezoelectric Transformers for Ultra-low Voltage Energy Harvesting Applications

Piezoelectric Transformers for Ultra-low Voltage Energy Harvesting Applications ¬リニ

This work shows the possibility to exploit piezoelectric transformers (PTs) for implementing step-up oscillators for ultra-low DC voltage energy harvesting (EH) applications. Oscillation is achieved by coupling a common source stage made up of nchannel JFETs with a piezoelectric transformer acting like a high gain notch filter. A voltage doubler is used to store energy in a capacitor. A mathema...

A parallel-SSHI rectifier for ultra-low-voltage piezoelectric vibration energy harvesting

An idling scheme of Synchronous Switch Harvesting on Inductor (SSHI) is proposed for piling up output voltage of the piezoelectric energy (PE) harvester cycle by cycle, to deal with the PE harvester’s low output voltage. The proposed rectifier integrates active diodes and a parallel-SSHI technique with a simple control scheme, and therefore has a high efficiency. The simulation results demonstr...

Piezoelectric Energy Harvesting Devices for Low Frequency Vibration Applications

Energy harvesting from low frequency applications using piezoelectric materials

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Piezoelectric Transformers for Space Applications

Piezoelectric transformers (PTs) have been successfully applied as step-up transformers for backlighting Cold Cathode Fluorescent Lamp s (CCFL) used in the liquid crystal displays of notebook computers. In the last decade, the interest in PTs has evolved to a second group of applications. Worldwide companies are now investigating the use of PTs for power applications, including battery chargers...