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Synchronous switch inductor energy collection interface circuit without secondary overturning

A technology of self-supply and circuit, which is applied in piezoelectric effect/electrostrictive or magnetostrictive motors, generators/motors, electrical components, etc., can solve the problems of frequent replacement and achieve reduction in number, high output voltage, The effect of high energy conversion efficiency

Active Publication Date: 2021-10-26
SHANDONG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The invention can convert the alternating current generated by the piezoelectric transducer into a stable direct current through the circuit, and then supply the energy storage unit for energy storage or directly supply power to the load, solving the problem of frequent replacement of traditional energy supply methods and realizing long-term automatic powered by

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  • Synchronous switch inductor energy collection interface circuit without secondary overturning
  • Synchronous switch inductor energy collection interface circuit without secondary overturning
  • Synchronous switch inductor energy collection interface circuit without secondary overturning

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Embodiment Construction

[0016] In order to make the circuits proposed by the present invention, the technical problems to be solved and the beneficial effects clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and specific implementations.

[0017] figure 1 Shown is the self-powered synchronous switching inductance energy harvesting circuit proposed by the present invention without secondary flipping. Such as figure 2 As shown, according to the working mode of the circuit, taking the half energy harvesting cycle as an example, the whole working process of the circuit is divided into four steps.

[0018] The following is a detailed description of the four working processes of the circuit:

[0019] 1. Natural charging process: at t 0 -t 1 phase, the piezoelectric element voltage V after inversion p has not yet reached the rectified voltage V rect , at this time, as the piezoelectric element moves forward, the equivalent curren...

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Abstract

The invention discloses a synchronous switch inductor energy collection interface circuit without secondary overturning. The synchronous switch inductor energy collection interface circuit comprises a piezoelectric element equivalent electrical model, a synchronous switch inductor module, a rectifier bridge module and a filtering and voltage stabilizing unit. According to the circuit, a high-frequency capacitance-inductance oscillation loop is formed by a piezoelectric element and an inductor by utilizing a peak detection switch circuit which is mainly composed of a triode and a capacitor, and the voltage overturning moment and the extreme moment of motion displacement are synchronized in real time, so that the output voltage of a piezoelectric transducer is increased; by utilizing the unilateral conductivity of the diode, the secondary overturning phenomenon in the existing self-powered synchronous switch inductance circuit is eliminated, and the adverse effect on energy collection caused by the secondary overturning process can be effectively avoided; in addition, peak detection capacitors in the positive and negative directions of the piezoelectric elements are multiplexed, and the number of the electronic elements of the type is reduced.

Description

technical field [0001] The invention relates to the technical field of energy conversion, and more specifically, relates to a self-powered piezoelectric energy collection interface circuit that eliminates the secondary reversal phenomenon. Background technique [0002] At present, the development of wireless sensing technology is becoming more and more mature, and some of these sensors have been gradually applied to various fields such as production and life. Due to the limited capacity of the traditional energy supply method represented by the battery, it needs to be disassembled and replaced when the service life is reached, and it is easy to cause pollution to the environment. It gradually no longer meets the energy supply requirements of wireless sensor nodes. Therefore, it has become a research hotspot to extract energy from the environment and convert it into usable electrical energy for wireless sensing. Among them, the piezoelectric energy harvesting technology is c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M7/04H02N2/18
CPCH02M7/04H02N2/18
Inventor 张斌柳洪生高峰
Owner SHANDONG UNIV