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This paper presents a novel low frequency vibration energy harvester with a contact based frequency upconversion and hybrid electromagnetic-piezoelectric transduction. The electromagnetic generator is proposed as the power source for wearable electronic devices, while an independent piezoelectric generator is used to provide power to an active rectification circuit for conditioning of the electromagnetic...
devices show pronounced bipolar multilevel resistive switching behaviors and negative capacitance effects. The active layer was grown on Nb-doped by molecular beam epitaxial technology. With the aid of forward or reverse bias, the devices can be switched to insulating or different conductive states. The devices show prominent...
This paper presents the design and implementation of contactless power couplers for transferring power to heat up the breathing tube and sensors of respiratory devices produced by Fisher & Paykel Healthcare Ltd, NZ. The respiratory device supplies humidified air to the patient through an air delivery tube. The air needs to be heated along the tube to prevent condensation and a sensor has to be...
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