Cantilever beam oscillating ferroelectric generator

Abstract

The invention relates to a cantilever beam oscillating ferroelectric generator. The current piezoelectric generator has low generating efficiency. And the invention comprises a metal cantilever beam, a mass block, a base, a ferroelectric film and an accumulator circuit. The base can oscillate up and down, one end of the strip metal cantilever beam is fixedly connected with the base and the other end thereof is fixedly connected with the mass block. The upper surface and the lower surface of the metal cantilever beam are respectively provided with the ferroelectric films in array, the top and the bottom of each ferroelectric film are provided with electricity collecting points in matrix, all collecting points on the top thereof are connected with top electrode wires by conductors, and all collecting points on the bottom thereof are connected with bottom electrode wires by the conductors. The top electrode wires are connected with one end input by the accumulator circuit, the bottom electrode wires are connected with the other end input by the accumulator circuit. Because the invention adopts the ferroelectric material as an electromechanical converter of the generator, susceptiveness is largely improved and larger output voltage and generation efficiency can be obtained.

Description

technical field [0001] The invention belongs to the technical field of energy and electronics, and in particular relates to a cantilever beam vibration type ferroelectric generating device. Background technique [0002] With the development of integrated circuit and MEMS technology, there are more and more researches on power generation devices based on vibration mechanical energy capture and conversion. For the output voltage of the power generation device, the larger the better, that is, it is required to convert the vibration mechanical energy into electrical energy as much as possible. Traditional vibrating piezoelectric power generation devices use piezoelectric materials as electromechanical converters. Due to the linear constitutive relationship of piezoelectric materials, only a small part of vibrational mechanical energy is converted into electrical energy, resulting in low output voltage and low power generation efficiency. At the same time, the input vibration fr...

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Problems solved by technology

However, the current piezoelectric power generation device uses piezoelectric materials as electromechanical converters. Under the same strain conditions, no electrical polarization and polarization reversal are induced in piezoelectric materials, and the electrical polarization induced by strain in the material is small, and the mechanical energy There is also less conversion to electric energy, which greatly affects the power generation efficiency of the power generation device

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