A Management Circuit for Vibrating Energy Harvester
نویسندگان
چکیده
A piezoelectric/magnetostrictive composite vibrating energy generator is introduced, and its output characteristic is analyzed. In order to increase the maximum output power of the vibrating energy harvester, a new up-conversion matching circuit is proposed, which can change the low frequency vibrating signal into a narrow bandwidth signal focused on a higher frequency. The matching circuit with a small-size permalloy transformer has a stronger capacitor charging power due to up-conversion. It can obviously improve the charging time and the storing energy at capacitor. In order to increase the output power, a power management circuit can release the energy for driving power load in a short time. Experiments show that the management circuit can drive a WSN node with an output power of 75mW at a distance of over 60m.
منابع مشابه
Segmentation of a Vibro-Shock Cantilever-Type Piezoelectric Energy Harvester Operating in Higher Transverse Vibration Modes
The piezoelectric transduction mechanism is a common vibration-to-electric energy harvesting approach. Piezoelectric energy harvesters are typically mounted on a vibrating host structure, whereby alternating voltage output is generated by a dynamic strain field. A design target in this case is to match the natural frequency of the harvester to the ambient excitation frequency for the device to ...
متن کاملPeculiarities of the Third Natural Frequency Vibrations of a Cantilever for the Improvement of Energy Harvesting
This paper focuses on several aspects extending the dynamical efficiency of a cantilever beam vibrating in the third mode. A few ways of producing this mode stimulation, namely vibro-impact or forced excitation, as well as its application for energy harvesting devices are proposed. The paper presents numerical and experimental analyses of novel structural dynamics effects along with an optimal ...
متن کاملEnergy Harvesting from Fluid Flow in Water Pipelines for Smart Metering Applications
In this paper a rotational, radial-flux energy harvester incorporating a three-phase generation principle is presented for converting energy from water flow in domestic water pipelines. The energy harvester together with a power management circuit and energy storage is used to power a smart metering system installed underground making it independent from external power supplies or depleting bat...
متن کاملSmart Adaptive Power Management in Electrostatic Harvester of Vibration Energy
This paper reports a new functional design and modeling of a vibration energy harvester composed from a mechanical resonator (MEMS), capacitive transducer and a conditioning circuit based on the BUCK DCDC converter architecture. The basic configuration of conditioning circuit from [1][2] is enhanced with two major features for the power management allowing, firstly, to adapt dynamically to the ...
متن کاملA Shoe-Embedded Piezoelectric Energy Harvester for Wearable Sensors
Harvesting mechanical energy from human motion is an attractive approach for obtaining clean and sustainable electric energy to power wearable sensors, which are widely used for health monitoring, activity recognition, gait analysis and so on. This paper studies a piezoelectric energy harvester for the parasitic mechanical energy in shoes originated from human motion. The harvester is based on ...
متن کامل