An Inductorless Self-Starting Energy Harvesting System for Piezoelectric Energy Harvesting

Abstract

The invention relates to the technical field of power management, and specifically relates to an inductive self-starting energy collection system for piezoelectric energy collection. The system comprises a synchronous capacitive switch circuit, a zero-crossing detection module, a pulse generation module, a pulse ranking module, a gate overdrive voltage level VDDA generation module, a cold start module and an LDO circuit. The inductive self-starting energy collection system for the piezoelectric energy collection provided by the invention has the following beneficial effects that a design ideaof ultra-low power consumption design and system miniaturization is adopted, a new structure is adopted, an existing piezoelectric energy collection system is improved and optimized, the power consumption of the system is reduced, the volume of the system is reduced, and meanwhile, the cold start module is added into the proposed system, and the self-starting problem of a system in the prior piezoelectric energy extraction technology is solved. When the vibration energy of the environment is sufficient, excess energy is stored in a large capacitor, power is supplied to a load after the voltageis stabilized by the LDO circuit, and the utilization efficiency of the energy is improved.

Description

technical field [0001] The invention relates to the technical field of power management, in particular to a non-inductor self-starting energy harvesting system for piezoelectric energy harvesting. Background technique [0002] With the decreasing of fossil energy, looking for a new energy has always been the work that people never stop. Among several common energy sources in daily life, such as solar energy, thermal energy, and vibration energy, vibration energy has a high power density, and piezoelectric energy harvesting technology has attracted extensive research interest in the power supply of wireless sensor network nodes. In order to effectively utilize the harvested energy, scholars at home and abroad have carried out a series of research on piezoelectric energy harvesting interface circuits. In terms of improving energy extraction efficiency, synchronous switching inductor technology is considered to be one of the most effective methods at present, but its cold star...

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Problems solved by technology

[0003] The purpose of the present invention is to overcome the existing problems in the prior art, and provide a non-inductive self-starting energy harvesting system for piezoelectric energy harvesting, which reduces the volume of the system, solves the problem of cold start of the system, and effectively The energy harvested by the system is fully utilized

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